POMPE MULTISTADIO

POMPE
MULTISTADIO
MULTISTAGE PUMPS
28
Pompe Multistadio
Multistage Pumps
PRESENTAZIONE
PRESENTATION
CR - CRI - CRN
CARATTERISTICHE GENERALI:
Le pompe CR, CRI e CRN sono pompe centrifughe multistadio
verticali. La costruzione in linea consente di installare la pompa
in un impianto orizzontale ad un tubo dove le bocche di
aspirazione e di mandata si trovano sullo stesso piano orizzontale
e presentano le stesse dimensioni del tubo. Questa costruzione
consente di avere una maggiore compattezza della struttura
della pompa e della tubazione. Le pompe Grundfos CR sono
disponibili in diverse taglie e grandezze. Le pompe CR sono
idonee per una varietà di applicazioni dal pompaggio di
acqua potabile e al trasferimento di liquidi chimici. Le pompe
sono disponibili per diverse applicazioni di pompaggio dove
le richieste e i materiali incontrono specifiche richieste. Le
pompe CR comprendono due componenti principali: il motore
e l'unità pompa. Il motore della pompa CR è un motore
Grundfos conforme alle norme EN. L' unità pompa comprende
componenti idraulici ottimizzati, diversi tipi di attacchi, una
camicia esterna, una testa pompa e diverse altre parti. Le
pompe CR sono disponibili in diverse versioni di materiali a
seconda del liquido pompato.
MATERIALE DELLA POMPA
La variante di materiale deve essere scelta sulla base del
liquido da pompare, vedere. La gamma dei prodotti è costituita
dai tre tipi di base:
• CR, CRI per liquidi puliti, non aggressivi, come acqua potabile
e sostanze oliose
•CRN CRN per liquidi industrialie acidi (contattare l' ufficio
tecnico Hytek). Per liquidi salini o a contenuto di cloruro, come
ad esempio l'acqua di mare, sono disponibili pompe CRT in
titanio.
ATTACCHI DELLA POMPA
La scelta dell' attacco della pompa dipende dalla pressione
nominale e dalla tubazione. Le pompe CR, CRI e CRN offrono
un'ampia gamma di attacchi flessibili per soddisfare tutte le
esigenze, tra i quali:
•Flangia ovale (BSP)
•Flangia DIN
•Giunto PJE
•Altri tipi di attacco a richiesta.
GENERAL FEATURES
Grundfos multistage in-line centrifugal pumps, types CR,
CRI and CRN, are designed for a wide range of
applications.CR, CRI, CRN pumps are suitable for liquid
transfer, circulation and pressure boosting of cold or hot
clean liquids. CRN pumps is used in systems where all parts
in contact with the liquid are made of high-grade stainless
steel. Pumped liquids Thin, clean, non-explosive liquids, not
containing solid particles or fibres. The liquid must not attack
the pump materials chemically. When pumping liquids with
a density and/or viscosity higher than that of water, use
motors with correspondingly higher outputs, if required.
The CR pumps include two principals component: the motor
and the unit pump. The CR motor pump is a Grundfos
motor and It is EN compliance. The pump unit includes
optimized hydraulic components, different types of
connections, an external protection, a head pump, and
other different spare parts. The CR pumps are available in
different models and materials in according to the pumped
liquid.
MATERIAL OF THE PUMP
The material of the pumps has to be select on the base of the
liquid to pump. The range of the products is constituted by
three base types:
• CR, CRI for clean liquids, not aggressive, as drinkable water
and oils substances.
• CRN CRN for industrials acid liquids (contact the
technical Hytek office). For salty liquid or liquid with
chloride, as the sea water, are available pumps in titanium
(series CRT).
PUMPS CONNECTIONS
The choice of the connections pump depends from the nominal
pressure and from the pipeline. The CR, CRI and CRN pumps
offer an ample range of flexible connections to satisfy all the
demands, among which:
• Oval flange (BSP)
• DIN flenge
• PJE joint
• Other types of connections on request.
www.hytekintl.com
CR - CRI - CRN
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI / VERTICAL MULTISTAGE CENTRIFUGAL
PUMPS
DIN
OVALE
O VA L
PJE
902
Pompe Multistadio
Multistage Pumps
PRESENTAZIONE
PRESENTATION
info@hytekintl.com
Minima pressione di ingresso - NPSH
Si consiglia di calcolare la pressione di ingresso "H" quando:
• la temperatura del liquido è elevata;
• la portata è notevolmente superiore alla portata nominale
della pompa
• l'acqua viene aspirata da grandi profondità
• le condizioni di aspirazione sono critiche.
Per evitare la cavitazione, assicurarsi che sia presente una
pressione minima in aspirazione della pompa. È possibile
calcolare il massimo sollevamento di aspirazione "H" in metri di
prevalenza come segue:
H = pb x 10,2 – NPSH – Hf – Hv – Hs
- pb = Pressione barometrica in bar. (La pressione barometrica
può essere impostata a 1 bar). Nei sistemi chiusi, pb indica la
pressione di sistema in bar.
- NPSH = Prevalenza di aspirazione netta positiva (Net Positive
Suction Head) espressa in metri di prevalenza. (Da leggersi
sulla curva NPSH nella massima portata erogata dalla pompa).
- Hf = Perdite per attrito nel tubo di aspirazione espresse in metri
di prevalenza.(Alla portata massima erogata dalla pompa).
- Hv = Pressione del vapore espressa in metri di prevalenza. (Da
leggersi sulla scala di pressione del vapore. "Hv" dipende dalla
temperatura del liquido "Tm").
- HS = Margine di sicurezza = minimo 0,5 metri di prevalenza.
Se il valore "H" risultante è positivo, la pompa può funzionare
con un dislivello in aspirazione di max. "H" metri di prevalenza.
Se il valore "H" risultante è negativo, è necessaria una pressione
di ingresso di almeno "H" metri di prevalenza.
Minimum inlet pressure
We recommend to calculate the inlet pressure "H" when:
• the temperature of the liquid is elevated;
• the flow rate is notably superior to the nominal flow rate of
the pump
• water is suction by great depths
• the suction conditions are critical.
To avoid the cavitation, to make sure that a least pressure is
present in aspiration of the pump. It is possible to calculate
the maximum load aspiration "H" in meters of prevalence as
it follows:
H = pb x 10,2 – NPSH – Hf – Hv – Hs
- pb = Barometric pressure in bar. (Barometric pressure can be
set to 1 bar.) In closed systems, pb indicates the system pressure
in bar.
- NPSH = Net Positive Suction Head in metres head (to be read
from the NPSH curve at the highest flow the pump will be
delivering).
- Hf = Friction loss in suction pipe in metres head at the highest
flow the pump will be delivering.
- Hv= Vapour pressure in metres head (to read it on the graphic
vapour pressure range. Hv depend to the Liquid temperature
"Tm"
- Hs = Safety margin = minimum 0.5 metres head.
If the calculated “H” is positive, the pump can operate at a
suction lift of maximum “H” metres head. If the calculated “H”
is negative, an inlet pressure of minimum “H”metres head is
required.
www.hytekintl.com
Hf
H
NPSH
Pb
Hv
Minima pressione di ingresso - NPSH Minimum inlet pressure - NPSH
Nota: per evitare la cavitazione non scegliere mai una pompa
il cui punto di lavoro è situato troppo a destra sulla curva NPSH.
Verificare sempre il valore NPSH della pompa in corrispondenza
della massima portata possibile.
903
Due to the risk of overheating, do not use the pump at flows
below the minimum flow rate.The curves below show the
minimum flow rate as a percentage of the nominal flow rate
in relation to the liquid temperature
Pompe Multistadio
Multistage Pumps
CR1- CRN1
CR1 - CRN1
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –20 a +120
- Max rendimento pompa (%): ___________________________ 48
- Portata nominale in (m3/h): _________________________ 0,7-2,4
- Pressione max. (bar): ___________________________________ 22
- Potenza motore [kW]: _____________________________ 0,37-2,2
- Attacco tubazione:
• Flangia ovale (BSP): _________________________________ Rp 1
• Flangia: _____________________________________ DN 25/DN 32
• Giunto PJE (Victaulic): _________________________ R 1¼DN 32
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –20 to +120
- Max pump performance (%): ___________________________ 48
- Nominal flow rate (m3/h): _________________________ 0,7-2,4
- Max. pressure (bar): ___________________________________ 22
- Motor power [kW]: _____________________________ 0,37-2,2
- Piping connection:
• Oval Flange (BSP): _________________________________ Rp 1
• Flangia: _____________________________________ DN 25/DN 32
• PJE joint (Victaulic): _________________________ R 1¼DN 32
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR1 - CRN1
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR1- CRN1 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR1- CRN1
CR 1
CRI 1
CRN 1
904
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR1/ TECHNICAL DRAW CR1
www.hytekintl.com
DIMENSIONI E PESI CR1/ DIMENSIONS AND WEIGHT CR1
905
CR1- CRN1
CR1- CRN1
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN1/ TECHNICAL DRAW CRN1
www.hytekintl.com
DIMENSIONI E PESI CRN1/ DIMENSIONS AND WEIGHT CRN1
906
Pompe Multistadio
Multistage Pumps
CR1- CRN1
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR1 - CRN1/ CURVES OF THE PERFORMANCES CR1 - CRN1
www.hytekintl.com
CR1 - CRN1
907
Pompe Multistadio
Multistage Pumps
CR3- CRN3
CR3 - CRN3
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –20 a +120
- Max rendimento pompa (%): ___________________________ 58
- Portata nominale in (m3/h): _________________________ 1,2-4,5
- Pressione max. (bar): ___________________________________ 24
- Potenza motore [kW]: _____________________________ 0,37 - 3
- Attacco tubazione:
• Flangia ovale (BSP): _________________________________ Rp 1
• Flangia: _____________________________________ DN 25/DN 32
• Giunto PJE (Victaulic): _________________________ R 1¼DN 32
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –20 to +120
- Max pump performance (%): ___________________________ 58
- Nominal flow rate (m3/h): _________________________ 1,2-4,5
- Max. pressure (bar): ___________________________________ 24
- Motor power [kW]: _____________________________ 0,37 - 3
- Piping connection:
• Oval Flange (BSP): _________________________________ Rp 1
• Flangia: _____________________________________ DN 25/DN 32
• PJE joint (Victaulic): _________________________ R 1¼DN 32
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR3 - CRN3
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR3- CRN3 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR3- CRN3
CR 3
CRI 3
CRN 3
908
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR3/ TECHNICAL DRAW CR3
www.hytekintl.com
DIMENSIONI E PESI CR3/ DIMENSIONS AND WEIGHT CR3
909
CR3- CRN3
CR3- CRN3
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN3/ TECHNICAL DRAW CRN3
www.hytekintl.com
DIMENSIONI E PESI CRN3/ DIMENSIONS AND WEIGHT CRN3
910
Pompe Multistadio
Multistage Pumps
CR3- CRN3
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR3 - CRN3/ CURVES OF THE PERFORMANCES CR3 - CRN3
www.hytekintl.com
CR3 - CRN3
911
Pompe Multistadio
Multistage Pumps
CR5- CRN5
CR5 - CRN5
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –20 a +120
- Max rendimento pompa (%): ___________________________ 66
- Portata nominale in (m3/h): _________________________ 2,5-8,5
- Pressione max. (bar): ___________________________________ 24
- Potenza motore [kW]: ____________________________ 0,37 - 5,5
- Attacco tubazione:
• Flangia ovale (BSP): ________________________________ Rp 1¼
• Flangia: _____________________________________ DN 25/DN 32
• Giunto PJE (Victaulic): _________________________ R 1¼DN 32
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –20 to +120
- Max pump performance (%): ___________________________ 66
- Nominal flow rate (m3/h): _________________________ 2,5-8,5
- Max. pressure (bar): ___________________________________ 24
- Motor power [kW]: _____________________________ 0,37 - 5,5
- Piping connection:
• Oval Flange (BSP): _________________________________ Rp 1¼
• Flangia: _____________________________________ DN 25/DN 32
• PJE joint (Victaulic): _________________________ R 1¼DN 32
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR5 - CRN5
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR5- CRN5 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR5- CRN5
CR 5
CRI 5
CRN 5
912
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR5/ TECHNICAL DRAW CR5
www.hytekintl.com
DIMENSIONI E PESI CR5/ DIMENSIONS AND WEIGHT CR5
913
CR5- CRN5
CR5- CRN5
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN5/ TECHNICAL DRAW CRN5
www.hytekintl.com
DIMENSIONI E PESI CRN5/ DIMENSIONS AND WEIGHT CRN5
914
Pompe Multistadio
Multistage Pumps
CR5- CRN5
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR5 - CRN5/ CURVES OF THE PERFORMANCES CR5 - CRN5
www.hytekintl.com
CR5 - CRN5
915
Pompe Multistadio
Multistage Pumps
CR10- CRN10
CR10 - CRN10
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –20 a +120
- Max rendimento pompa (%): ___________________________ 70
- Portata nominale in (m3/h): _________________________ 5-13
- Pressione max. (bar): ___________________________________ 22
- Potenza motore [kW]: ____________________________ 0,37-7,5
- Attacco tubazione:
• Flangia ovale (BSP): ________________________________ Rp 1½
• Flangia: ____________________________________________ DN 40
• Giunto PJE (Victaulic): __________________________ R 2 DN 50
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –20 to +120
- Max pump performance (%): ___________________________ 70
- Nominal flow rate (m3/h): _____________________________ 5-13
- Max. pressure (bar): ___________________________________ 22
- Motor power [kW]: _____________________________ 0,37 - 7,5
- Piping connection:
• Oval Flange (BSP): _________________________________ Rp 1½
• Flangia: ____________________________________________ DN 40
• PJE joint (Victaulic): _____________________________ R 2 DN 50
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR10 - CRN10
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR10- CRN10 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR10- CRN10
CR 10
CRI 10
CRN 10
916
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR10/ TECHNICAL DRAW CR10
www.hytekintl.com
DIMENSIONI E PESI CR10/ DIMENSIONS AND WEIGHT CR10
917
CR10- CRN10
CR10- CRN10
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN10/ TECHNICAL DRAW CRN10
www.hytekintl.com
DIMENSIONI E PESI CRN10/ DIMENSIONS AND WEIGHT CRN10
918
Pompe Multistadio
Multistage Pumps
CR10- CRN10
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR10 - CRN10/ CURVES OF THE PERFORMANCES CR10 CRN10
www.hytekintl.com
CR10 - CRN10
919
Pompe Multistadio
Multistage Pumps
CR15- CRN15
CR15 - CRN15
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –20 a +120
- Max rendimento pompa (%): ___________________________ 72
- Portata nominale in (m3/h): _________________________ 9-24
- Pressione max. (bar): ___________________________________ 23
- Potenza motore [kW]: _______________________________ 1,1-15
- Attacco tubazione:
• Flangia ovale (BSP): _________________________________ Rp 2
• Flangia: ____________________________________________ DN 50
• Giunto PJE (Victaulic): __________________________ R 2 DN 50
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –20 to +120
- Max pump performance (%): ___________________________ 72
- Nominal flow rate (m3/h): _____________________________ 9-24
- Max. pressure (bar): ___________________________________ 23
- Motor power [kW]: _________________________________ 1,1 - 15
- Piping connection:
• Oval Flange (BSP): __________________________________ Rp 2
• Flangia: ____________________________________________ DN 50
• PJE joint (Victaulic): _____________________________ R 2 DN 50
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR15 - CRN15
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR15- CRN15 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR15- CRN15
CR 15
CRI 15
CRN 15
920
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR15/ TECHNICAL DRAW CR15
www.hytekintl.com
DIMENSIONI E PESI CR15/ DIMENSIONS AND WEIGHT CR15
921
CR15- CRN15
CR15- CRN15
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN15/ TECHNICAL DRAW CRN15
www.hytekintl.com
DIMENSIONI E PESI CRN15/ DIMENSIONS AND WEIGHT CRN15
922
Pompe Multistadio
Multistage Pumps
CR15- CRN15
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR15 - CRN15/ CURVES OF THE PERFORMANCES CR15 CRN15
www.hytekintl.com
CR15 - CRN15
923
Pompe Multistadio
Multistage Pumps
CR20- CRN20
CR20 - CRN20
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –20 a +120
- Max rendimento pompa (%): ___________________________ 72
- Portata nominale in (m3/h): _________________________ 11-29
- Pressione max. (bar): ___________________________________ 25
- Potenza motore [kW]: ______________________________ 1,1-18,5
- Attacco tubazione:
• Flangia ovale (BSP): _________________________________ Rp 2
• Flangia: ____________________________________________ DN 50
• Giunto PJE (Victaulic): __________________________ R 2 DN 50
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –20 to +120
- Max pump performance (%): ___________________________ 72
- Nominal flow rate (m3/h): ____________________________ 11-29
- Max. pressure (bar): ___________________________________ 25
- Motor power [kW]: ________________________________ 1,1 - 18,5
- Piping connection:
• Oval Flange (BSP): __________________________________ Rp 2
• Flangia: ____________________________________________ DN 50
• PJE joint (Victaulic): _____________________________ R 2 DN 50
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR20 - CRN20
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR20- CRN20 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR20- CRN20
CR 20
CRI 20
CRN 20
924
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR20/ TECHNICAL DRAW CR20
www.hytekintl.com
DIMENSIONI E PESI CR20/ DIMENSIONS AND WEIGHT CR20
925
CR20- CRN20
CR20- CRN20
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN20/ TECHNICAL DRAW CRN20
www.hytekintl.com
DIMENSIONI E PESI CRN20/ DIMENSIONS AND WEIGHT CRN20
926
Pompe Multistadio
Multistage Pumps
CR20- CRN20
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR20 - CRN20/ CURVES OF THE PERFORMANCES CR20 CRN20
www.hytekintl.com
CR20 - CRN20
927
Pompe Multistadio
Multistage Pumps
CR32- CRN32
CR32 - CRN32
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –30 a +120
- Max rendimento pompa (%): ___________________________ 78
- Portata nominale in (m3/h): _________________________ 15-40
- Pressione max. (bar): ___________________________________ 28
- Potenza motore [kW]: _______________________________ 1,5-30
- Attacco tubazione:
• Flangia: ____________________________________________ DN 65
• Giunto PJE (Victaulic): ________________________ 3" (su richiesta)
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –30 to +120
- Max pump performance (%): ___________________________ 78
- Nominal flow rate (m3/h): ____________________________ 15-40
- Max. pressure (bar): ___________________________________ 28
- Motor power [kW]: _________________________________ 1,5 - 30
- Piping connection:
• Flangia: ____________________________________________ DN 65
• PJE joint (Victaulic): ___________________________ 3" (on request)
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR32 - CRN32
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR32- CRN32 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR32- CRN32
CR 32
CRI 32
CRN 32
928
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR32/ TECHNICAL DRAW CR32
www.hytekintl.com
DIMENSIONI E PESI CR32/ DIMENSIONS AND WEIGHT CR32
929
CR32- CRN32
CR32- CRN32
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN32/ TECHNICAL DRAW CRN32
www.hytekintl.com
DIMENSIONI E PESI CRN32/ DIMENSIONS AND WEIGHT CRN32
930
Pompe Multistadio
Multistage Pumps
CR32- CRN32
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR32 - CRN32/ CURVES OF THE PERFORMANCES CR32 CRN32
www.hytekintl.com
CR32 - CRN32
931
Pompe Multistadio
Multistage Pumps
CR45- CRN45
CR45 - CRN45
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –30 a +120
- Max rendimento pompa (%): ___________________________ 79
- Portata nominale in (m3/h): _________________________ 22-58
- Pressione max. (bar): ___________________________________ 33
- Potenza motore [kW]: _______________________________ 3-45
- Attacco tubazione:
• Flangia: ____________________________________________ DN 80
• Giunto PJE (Victaulic): ________________________ 4" (su richiesta)
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –30 to +120
- Max pump performance (%): ___________________________ 79
- Nominal flow rate (m3/h): ____________________________ 22-58
- Max. pressure (bar): ___________________________________ 33
- Motor power [kW]: ___________________________________ 3 - 45
- Piping connection:
• Flangia: ____________________________________________ DN 80
• PJE joint (Victaulic): ___________________________ 4" (on request)
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR45 - CRN45
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR45- CRN45 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR45- CRN45
CR 45
CRI 45
CRN 45
932
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR45/ TECHNICAL DRAW CR45
www.hytekintl.com
DIMENSIONI E PESI CR45/ DIMENSIONS AND WEIGHT CR45
933
CR45- CRN45
CR45- CRN45
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN45/ TECHNICAL DRAW CRN45
www.hytekintl.com
DIMENSIONI E PESI CRN45/ DIMENSIONS AND WEIGHT CRN45
934
Pompe Multistadio
Multistage Pumps
CR45- CRN45
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR45 - CRN45/ CURVES OF THE PERFORMANCES CR45 CRN45
www.hytekintl.com
CR45 - CRN45
935
Pompe Multistadio
Multistage Pumps
CR64- CRN64
CR64 - CRN64
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –30 a +120
- Max rendimento pompa (%): ___________________________ 80
- Portata nominale in (m3/h): _________________________ 30-85
- Pressione max. (bar): ___________________________________ 22
- Potenza motore [kW]: _______________________________ 4-45
- Attacco tubazione:
• Flangia: ___________________________________________ DN 100
• Giunto PJE (Victaulic): ________________________ 4" (su richiesta)
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –30 to +120
- Max pump performance (%): ___________________________ 80
- Nominal flow rate (m3/h): ____________________________ 30-85
- Max. pressure (bar): ___________________________________ 22
- Motor power [kW]: ___________________________________ 4 - 45
- Piping connection:
• Flangia: ___________________________________________ DN 100
• PJE joint (Victaulic): ___________________________ 4" (on request)
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR64 - CRN64
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR64- CRN64 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR64- CRN64
CR 64
CRI 64
CRN 64
936
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR64/ TECHNICAL DRAW CR64
www.hytekintl.com
DIMENSIONI E PESI CR64/ DIMENSIONS AND WEIGHT CR64
937
CR64- CRN64
CR64- CRN64
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN64/ TECHNICAL DRAW CRN64
www.hytekintl.com
DIMENSIONI E PESI CRN64/ DIMENSIONS AND WEIGHT CRN64
938
Pompe Multistadio
Multistage Pumps
CR64- CRN64
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR64 - CRN64/ CURVES OF THE PERFORMANCES CR64 CRN64
www.hytekintl.com
CR64 - CRN64
939
Pompe Multistadio
Multistage Pumps
CR90- CRN90
CR90 - CRN90
CARATTERISTICHE GENERALI:
- Base pompa:
• CR: ___________________________________ ghisa e acciaio inox
• CRN: _________________________________________________ Inox
- Temperatura (°C): ______________________________ –30 a +120
- Max rendimento pompa (%): ___________________________ 81
- Portata nominale in (m3/h): _________________________ 45-120
- Pressione max. (bar): ___________________________________ 20
- Potenza motore [kW]: _______________________________ 5,5-45
- Attacco tubazione:
• Flangia: ___________________________________________ DN 100
• Giunto PJE (Victaulic): ________________________ 4" (su richiesta)
- Forma costruttiva:
• Fino a 4 kW: _________________________________________ V 18
• Da 5,5 kW: __________________________________________ V 1
- Classe di isolamento: ___________________________________ F
- Classe di rendimento : _____________EFF 1(da 0,37 a 0,75 kW
le pompe sono con motori EFF 2)
- Classe di protezione: _________________________________ IP 55
- Tensione di alimentazione (tolleranza: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Frequenza di alimentazione: _________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
GENERAL FEATURES
- Base of the pompa:
• CR: ________________________________ brass and stainless steel
• CRN: _________________________________________________ steel
- Temperature (°C): ______________________________ –30 to +120
- Max pump performance (%): ___________________________ 81
- Nominal flow rate (m3/h): ___________________________ 45-120
- Max. pressure (bar): ___________________________________ 20
- Motor power [kW]: _________________________________ 5,5 - 45
- Piping connection:
• Flangia: ___________________________________________ DN 100
• PJE joint (Victaulic): ___________________________ 4" (on request)
-Constructive form:
• Up to 4 kW: _________________________________________ V 18
• From 5,5 kW: _________________________________________ V 1
- Isolation class: __________________________________________ F
- Performance class : _____________EFF 1(from 0,37 to 0,75 kW
the pumps are with motors EFF 2)
- Protection class: _________________________________ IP 55
- Power supply (tollerance: ±10 %):
• P2: ____________________ 0,37-1,5 kW: (3 x 220-240/380-415 V)
• P2: ______________________________ 2,2-11 kW: (3 x 380-415 V)
• P2: ______________________ 15-75 kW: (3 x 380-415/660-690 V)
- Electrical frequency: _________________________________ 50 Hz
CERTIFICATI
- 98/37/CE (Standard EN 809: 1998)
- 2006/95/CE (Standard EN 60204-1: 1997 e EN 60034-1)
- 2004/108/CE
www.hytekintl.com
CR90 - CRN90
info@hytekintl.com
POMPE MULTISTADIO CENTRIFUGHE VERICALI CR90- CRN90 / VERTICAL MULTISTAGE
CENTRIFUGAL PUMPS SERIES CR90- CRN90
CR 90
CRI 90
CRN 90
940
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CR90/ TECHNICAL DRAW CR90
www.hytekintl.com
DIMENSIONI E PESI CR90/ DIMENSIONS AND WEIGHT CR90
941
CR90- CRN90
CR90- CRN90
Pompe Multistadio
Multistage Pumps
info@hytekintl.com
DISEGNO TECNICO CRN90/ TECHNICAL DRAW CRN904
www.hytekintl.com
DIMENSIONI E PESI CRN90/ DIMENSIONS AND WEIGHT CRN90
942
Pompe Multistadio
Multistage Pumps
CR90- CRN90
info@hytekintl.com
CURVE DELLE PRESTAZIONI CR64 - CRN64/ CURVES OF THE PERFORMANCES CR90 CRN90
www.hytekintl.com
CR90 - CRN90
943