CONTROL DAMPER

CONTROL DAMPER
C.V.B. Valvole Industriali s.r.l.
COMPANY PROFILE
C.V.B. valvole industriali S.r.l. is an Italian leading manufacturing company located at 25 Km. north of
Milan and established in 2004 to provide top quality metal to metal triple offsets torque seated quarter
turn valve solution to the Oil and Gas Market. Although their relatively newly built story as Company
they can present a thirty year experience in the Valve Market due to both their management and employees consolidated presence either in the Industrial and Petrochemical Valve Markets. During these
years C.V.B. s.r.l. have performed a constant growth business wise and size wise following the increased
demand for a vast range of products and solutions so far.
Product wise C.V.B. s.r.l. went through an internal re-organization with different product lines in such a
way it would be possible to serve the Market with specific products and services.
Presently the Product Range consist of:
• Triple eccentric metal to metal torque seated quarter turn valve ANSI standard from 3 up to 48” ,
from 150 up to 900 pressure class– Materials: WCB, LCB, LCC, WCC, WC6, WC9, CF8,
CF8M,CF3M,Titanium- Others according to ASTM Standard- Double Flanged, Lug, Wafer, Butt Welded Type
• Triple eccentric metal to metal torque seated quarter turn valve DIN from 80 up to 1400 diameter, from PN 10 up to PN 80 pressure class- Materials: Carbon steel: 1.0460-1.0619,Stainless Steel:
1.4581-1.4552, Alloy Steel: 1.7363-1.7365
• Double eccentric H.P. Valve -Soft Seated, Fire Safe Seat, Metal Seated ANSI standard from 2 up
to 24”, 150,300 pressure class – Materials: WCB,CF8,CF8M, Others according to ASTM Standard – Wafer and Lug Type
• Rubber lined butterfly valves -from 2” up to DN 48”, ANSI 150 and PN from 6 up 25 pressure classMaterials:Grey and Ductile Iron, WCB, CF8M, Aluminum Bronze, Aluminum – Wafer and Lug Type
• Control Dampers for Hot Air and Fumes up to 700°C- from DN32 up to DN 1200 diameter, PN 6 up
to PN 16 pressure class- Materials: Grey and Ductile Iron, WCB,CF8M, Others according to ASTM
Standard – Double Flanged, Wafer and Lug Type
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
The CD model control dampers, are essentially unlined butterfly valves intended for low pressure gas lines. They are
used where tight shut-off is not required.
The lightweight construction with the narrow wafer body enables easy fitmet of these valves in ducts, manifolds and
exhaust lines without additional support or strenthening of pipelines.
Features:
•
Very low operating torque due to the seatless construction
•
Ideal for flow control and modulating duty in low pressure gas lines
•
Low pressure drop in open position.
•
Whide operating temperature range to cater to exhaust & flue gas control lines
•
Perfet adaptability for manual or actuated applications
•
Are primarily intended for low pressure large volume gas and hot air flow control applications.
•
Are Ideal for furnace air flow and combustion control applications
•
Disc pins located high on the shaft in order to reduce torsional displacement of the disc and actuator driving
arm
•
Disc in an unlined body must clear the body at all angles of rotation
•
The bonnet packing box contains the stem seal. Extended bonnet allows opations above 350 °C
•
Leakage rates are based on the best fit obtainable within normal manufacturing tolerances while allowing the
clearance to operate at design temperature without galling.
•
For tighter shut off in high temperature service, a Ni-resist split ring seal may be inserted in a groove in the
outer edge of the disc
•
Valves with outboard bearing design are often specified for high temperature service, however, the long shaft
limits the pressure differential rating of the valve
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPERS
ANNULAR BODY BUTTERFLY TYPE
GENERAL
Control damper CD Annular type valve are designed to be clamp-fitted between two flanges and they should, above
DN 200, always installed with the spindle in horizontal position. Centering holes are provided for sizes fron DN 350
and above. Spindle seal: Gland packing, O-sealing rings. Special design: Gland packing with sealing—air feed or self
adjusting type with cup springs.
OPERATING DATA
For clamp-fitting between flanges as per DIN standard, PN 6/10/16 or as per ANSI 150.
Suitable for temperatures from—40 °C up to + 700 °C depending on material combination.
Standard temperature classes:
•
< 100 °C, 100 °C < t > 350 °C, 350 °C < t > 450 °C, > 450 °C
•
Manual or Motor operated types: Manual with ratchet adjustment to be locked in 16 positions
Worm gear system
Motor operated : Electric Actuator, Pneumatic, Hydraulic
•
Accessories: End position switches, proximity initiators, positioning actuators, position transducers
T in °C
100
350
450
550
700
BODY
GREY IRON
DIN1691 GG25
ASTM A48 GR.40
GREY IRON
DIN1691 GG25
ASTM A48 GR.40
CARBON STEEL
DIN St 37
ASTM A675 Gr.50
DUCTIL IRON
DIN1693 GGG40
ASTM A563 GR.65
CARBON STEEL
DIN HII
ASTM A515 Gr.60
STAINLESS STEEL
DIN 1.4541
ASTM A276 A321
DIN 1.4571
ASTM A316T
STAINLESS STEEL
DIN 1.4541
ASTM A276 A321
DISC
GREY IRON
DIN1691 GG25
ASTM A48 GR.40
CARBON STEEL
DIN St 37
ASTM A675 Gr.50
GREY IRON
DIN1691 GG25
ASTM A48 GR.40
CARBON STEEL
DIN St 37
ASTM A675 Gr.50
DUCTIL IRON
DIN1693 GGG40
ASTM A563 GR.65
CARBON STEEL
DIN HII
ASTM A515 Gr.60
STAINLESS STEEL
DIN 1.4541
ASTM A276 A321
DIN 1.4571
ASTM A316T
STAINLESS STEEL
DIN 1.4541
ASTM A276 A321
SPINDLE
CARBON STEEL
DIN St 37
ASTM A675 Gr.50
CARBON STEEL
DIN St 37
ASTM A675 Gr.50
STAINLESS STEEL
DIN 1.4021
ASTM A276 420
STAINLESS STEEL
DIN 1.4021
ASTM A276 420
DIN 1.4305
ASTM A303
STAINLESS STEEL
DIN 1.4541
ASTM A276 A321
DIN 1.4571
ASTM A316T
STAINLESS STEEL
DIN 1.4541
ASTM A276 A321
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPERS
ANNULAR BODY BUTTERFLY TYPE
Allowable differential pressure through the disc in closing position at a temperature of 30 °C
DN
Bar
DN
Bar
DN
Bar
15
10
125
8
500
2,5
20
10
150
6
550
2,5
25
10
175
6
600
2,3
32
7
200
6
700
1,7
40
4
225
5
800
1,7
50
3
300
3,5
900
1,4
65
3
350
3
1000
1,3
80
2
400
3
1200
1
100
2
450
2,5
Reduction factor ( f ) for working temperature conditions
T in °C
150
200
250
300
350
f
0,8
0,75
0,7
0,66
0,64
T in °C
400
450
500
550
f
0,61
0,6
0,59
0,52
To have the effective allowable differential pressure through the disc multiply the value related to a selected DN by
the reduction factor ( f ) related to the effective working condition.
Exemple: DN 100 at 500 °C— From the tables above = 2 x 0,59 = 1,18 Bar.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPERS
DN 15 –DN 300 WITH LEVER
OVERALL DIMENSIONS
DN
B
D
C
H
d
15
25
44
60
140
8
20
25
44
60
140
8
25
25
60
75
155
10
32
25
67
80
160
10
40
25
75
85
165
10
50
25
85
95
175
10
65
25
105
100
180
12
80
30
120
105
185
12
100
30
140
115
195
12
125
35
170
135
220
12
150
40
195
150
235
15
175
40
225
165
250
15
200
40
255
175
260
15
225
40
310
220
320
15
300
45
360
240
340
20
All dimensions in mm.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
DN 300 –DN 1200 WITH LEVER
OVERALL DIMENSIONS
DN
B
D
C
H
d
300
45
360
240
340
20
350
45
415
290
425
25
400
50
465
335
470
30
450
50
520
360
495
30
500
55
570
400
535
30
550
60
620
420
555
30
600
65
675
460
595
30
700
70
780
495
630
35
800
75
880
545
680
40
900
80
980
600
735
40
1000
90
1080
670
805
45
1200
90
1295
790
925
45
All dimensions in mm.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
DN 65 –DN 550 BARE SHAFT AND STEM EXTENSION
OVERALL DIMENSIONS
DN
B
D
C
K
d
65
25
105
100
*
12
80
30
120
105
*
12
100
30
140
115
*
12
125
35
170
135
*
12
150
40
195
150
*
15
175
40
225
165
*
15
200
40
255
175
*
15
225
40
280
185
*
15
250
40
310
220
*
15
300
45
360
240
*
20
350
45
415
290
*
25
400
50
465
335
*
30
450
50
520
360
*
30
500
55
570
400
*
30
550
60
620
420
*
30
* K varies depending on working temperatures— All dimensions in mm.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
DN 600 –DN 1200 BARE SHAFT AND STEM EXTENSION
OVERALL DIMENSIONS
DN
B
D
C
K
d
600
65
675
460
*
30
700
70
780
495
*
35
800
75
880
545
*
40
900
80
980
600
*
40
1000
90
1080
670
*
45
1200
90
1295
790
*
45
* K varies depending on working temperatures— All dimensions in mm.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
DN 100 – DN 1000 BARE SHAFT AND DOUBLE STEM EXTENSION
OVERALL DIMENSIONS
DN
B
D
C
K
d
Kg.
100
25
105
100
*
12
12
150
40
195
150
*
15
15
175
40
225
165
*
15
18
200
40
255
175
*
15
21
250
40
310
220
*
15
27
300
45
360
240
*
20
32
350
45
415
290
*
25
43
400
50
465
335
*
30
55
450
50
520
360
*
30
70
500
55
570
400
*
30
96
600
65
675
460
*
30
100
700
70
780
495
*
35
160
800
75
880
545
*
40
180
900
80
980
600
*
40
225
1000
90
1080
870
*
45
355
* K varies depending on working temperatures— All dimensions in mm.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
DOUBLE FLANGED TYPE DN 32 – DN 500 WITH LEVER
GENERAL
•
•
•
•
•
•
•
•
•
The double flanged control damper, for sizes above DN 200, should be installed ,in all cases, with spindle in
horizontal position.
Spindle seat with gland packing
Special spindle seal design: gland packing with seal-air feed system or self adjusting with cup springs
Flanges design according to DIN 2631, DIN 2632, DIN 2633 for PN 6, PN 10, PN 16
Suitable for temperatures from — 40°C up to + 650 °C, depending to the material selected
Manual Operated with ratchet adjustment, with 16 position available with docking device acting on the spindle
Worm gear operated as option
Motor operated by means: Electric Actuator ( including spring operated return systems ), Pneumatic Actuator
double or single action, Hydraulic ( also suitable for flameproof design )
Accessories: End position switches, proximity initiators, positioning actuators, position trasducers
Leakage rate corrispondance with sealing type
SEALING ON THE DISC
•
•
•
Contoured disc
Flat—contact disc
Body seat ring
LEAKAGE RATE( at opening position of 90 % )
1,0 %
0,2 %
0,2 %
NOTE: Where not specified we supply valves up to DN 300 in flat-contact type ( max. 90 °C ) and slightly contoured
closure from DN 350 and above.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
DOUBLE FLANGED TYPE DN 32 – DN 500 WITH LEVER
FLANGES DRILLING DIN 2631 - PN 6
DN
32
40
50
65
80
100
125
150
200
250
300
400
500
L
70
70
70
70
80
90
90
100
110
120
120
130
140
H
130
135
140
150
165
175
190
200
230
255
290
340
390
G
110
110
110
125
125
125
125
125
220
220
220
220
220
F
100
100
100
100
100
100
100
100
100
160
160
160
160
Weight
Kg.
3,5
3,7
4,4
5,5
7,8
9
12,4
14,7
21
28,5
39
54,6
79,2
FLANGES DRILLING DIN 2632 - PN 10
DN
32
40
50
65
80
100
125
150
200
250
300
400
500
L
80
80
90
90
100
100
110
110
120
140
140
140
140
H
140
145
150
160
170
180
195
210
240
270
290
350
405
G
110
110
110
125
125
125
125
125
220
220
220
220
220
F
100
100
100
100
100
100
100
100
100
160
160
160
160
Weight
Kg.
4,5
5,4
6,8
8
9,2
10,5
15,5
20,4
29,3
37,3
46,2
70,2
94,4
FLANGES DRILLING DIN 2633 - PN 16
DN
32
40
50
65
80
100
125
150
200
250
300
400
500
L
80
80
90
90
100
100
110
110
120
140
150
170
180
H
140
145
150
160
170
180
195
210
240
270
300
360
425
G
110
110
110
125
125
125
125
125
220
220
220
220
220
F
100
100
100
100
100
100
100
100
100
160
160
160
160
Weight
Kg.
4,5
5,4
6,8
8,2
9,5
10,8
16,3
21,6
30,5
38,9
55
90,6
147,5
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPERS
ANNULAR AND FLANGED BODY TYPE - VALVE SELECTION
The Flow Rate characteristic curve shows the percentage of flow passing through the damper in function of the disc
opening angle. In case of OPEN/CLOSE damper which is used for shut-off/isolation service, damper opening angle
can reach an angle up to 90°.
For control service, the nominal damper diameter should be selected in such a way that the maximum flow rate is
assured at a maximum opening angle of 70°. Damper has a characteristic curve which is approximately an equalpercentage curve in the range 0 - 70°.
%
Disc Opening angle
SEALING MODES FEATURES
LEAKAGE RATES
•
Contoured disc
1% of KV at 90°
•
Flat - contact disc ( up to 90°C and DN 300 )
0,2% of KV at 90°
•
Body seat ring
0,2% of KV at 90°
•
Body seat ring with flexible sealing
0,02%of KV at 90°
sheathed on three sides
Where not specified we supply the control damper valve CD series with flat - contact disc up to 90 °C
service temperature and up to DN 300. From DN 350 and above standard valve feature has contoured
disc sealing mode.
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
CONTROL DAMPER
FLOW COELLICIENT CV
Valve sizing calculation CV
CV, imperial units ( CV= Flow rate GPM with 1 psi pressure drop ) allow to set the valve Nominal Diameter
depending on the fluid working condition .
Once the CV has been calculated , select the correct valve diameter by using the relevant CV valve data sheet in
order to have the calculated CV at almost 80 % of the relevant CV valve data.
GAS
Case 1° = Absolute outlet pressure greater than 50 % of the absolute inlet pressure.
Q
P1
P2
T
d
= Flow rate
= Differential pressure outlet-inlet
= Absolute inlet pressure
= Absolute outlet pressure
= Absolute temperature ( t + 273)
= Gas density related to air
m3/h
Kg/cm2
Kg/cm2
Kg/cm2
°C
Kg/dm3
Case 2° = Absolute outlet pressure equal or lower than 50 % of the absolute inlet pressure.
Q
= Portata gas
= Differential pressure outlet-inlet
m3/h
Kg/cm2
P1
P2
T
d
= Absolute inlet pressure
= Absolute outlet pressure
= Absolute temperature ( t + 273)
= Gas density related to air
Kg/cm2
Kg/cm2
°C
Kg/dm3
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com
C.V.B. VALVOLE INDUSTRIALI S.R.L.
Via Industria,24 - 20020 Arconate (Mi)
Tel: (+39).0331.461737 Fax: (+39).0331.539175
E-mail: info@cvbvalves.com