ERHARD ECLI butterfly valve

ERHARD is a company of
ERHARD ECLI
butterfly valve
The cost-effective solution
for simple shut-off tasks
Two types of valves are mainly used for shutting off pipelines in sewage engineering or industrial applications:
•One of these is the gate valve, which was developed in the ancient world and
is still used in many applications today thanks to its sophisticated technology
and, above all, the free passage it provides when in the open position.
•The other is the butterfly valve, where a sturdy valve disc is moved between
the open and closed position in the media flow, and which has a much smaller
design height than a gate valve.
Where high pressures and large nominal sizes are involved, double-eccentric
butterfly valves such as the ERHARD ROCO Premium butterfly valve are mainly
used, since their design guarantees safe opening and closing even under
extreme conditions as well as reliable cavitation protection.
ERHARD ECLI butterfly valves – the economic alternative
Quite often, however, the demands made on shut-off valves are simple e. g.
where only small pressures or sizes are required or if the valve is only rarely
used, such as is the case with servicing valves up- or downstream from control
valves. The ERHARD ECLI butterfly valve is the perfect solution here, since it
combines the small design height of a butterfly valve with the cost advantages
of a gate valve – all in a shorter face-to-face dimension.
The ERHARD ECLI butterfly valve can be used for applications including cold
water and drinking water, air and gas as well as general industrial applications.
Thanks to numerous material options for the valve disc and seal, special application cases can also be realised without any problems.
They are available in nominal sizes of DN 32 to DN 1200 in numerous versions
and can be combined with numerous drive options.
The large range of nominal sizes as well as
the flexible installation and drive options
make ERHARD ECLI butterfly valves the
cost-efficient solution for many and diverse
problems.
2
ERHARD ECLI butterfly valve
Overview of ERHARD ECLI butterfly valves
„Wafer type“ for clamping
DN 32-700
„Lug type“ for flange-mounting
DN 32-300
„Flange type“ with double flange
DN 350-1200
„Wafer type“
„Lug type“
„Flange type“
for clamping
for flange-mounting
with double flange
Properties and advantages
at a glance
6
3
5
2
1
4
No. Component
Properties and advantages
1
Sturdy design with rigid valve disc
Closing system sealed absolutely airtight
and keyed seat ring
in both directions of flow
2
Replaceable seal made of high-grade materials
Low maintenance costs, at the same time can be
3
Drive shaft has no contact with the media,
No contact between the medium and shaft and body,
shaft end with involute gearing
secure, positive torque transmission
4
Aerodynamically shaped valve discs
Good hydraulic valves in both directions and
made of numerous materials
adaptable to different media
5
Available in versions for clamping,
Straightforward integration in any pipe
6
Low torques, can be combined with
adapted for numerous types of media
flange-mounted or with double flange
Low-cost operation no matter the task
a wide range of drives
ERHARD ECLI butterfly valve
3
Well-thought through design
features for optimum performance
ERHARD ECLI butterfly valves are soft-sealing valves of the face-to-face dimension DIN EN 558 series 20 (formerly DIN 3202 K1). They have a well-thought
through, sturdy and fail-safe design.
The body is the first indication of this - made of sturdy spheroidal graphite cast
iron EN-JS1030, it is coated with ERHARD EKB fusion bonded epoxy (FBE) in
blue and a layer thickness of at least 150 µm as corrosion protection.
Valve and seal for a perfect closing system
The central element of the butterfly valve is the aerodynamically designed
valve disc, which is available either in an FBE-coated version made of spheroidal graphite cast iron EN-JS1030 or a stainless steel 1.4408 version for more
demanding requirements.
The valve disc is mounted centrally in the body in maintenance-free bushings
and closes against a single-piece keyed sealing ring, which is firmly anchored
in the body and seals the complete valve passage, resulting in a completely tight
seal in both directions of flow.
The sealing ring is made of high-grade EPDM in accordance with KTW W270
for drinking water or of NBR for gas. Thanks to the slightly protruding design
it also seals against the flange connection, which means no additional flange
seals are required.
The design ensures that only the valve disc and seal come into contact with the
medium. In contrast, the shaft, which is positively connected with the valve disc,
is completely encapsulated. The end of the shaft has involute gearing which
always guarantees reliable torque transmission without play.
1
2
3
Numerous sophisticated details guarantee the safe function of ERHARD ECLI butterfly valves:
The involute gearing at the end of the drive shaft ensures reliable transmission of force [1], the
valve disc seals positively against the sealing ring [2] and the seal can easily be replaced at any
time thanks to the centring marking with the nominal size impressed on it [3].
4
ERHARD ECLI butterfly valve
Hydraulic data
Flow depending on
Calculation of the pressure loss
the opening angle
with liquids
100
Flow in per cent
2
( )
90
Q
Δp = ––––– · γ
Kv
80
70
60
Δp in kg/cm2
50
Q in m3/h
40
γ relative density
30
20
Kv Flow coefficient according
10
0
(in relation to water)
to the table on the right
10 20 30 40 50 60 70 80 90
Opening angle in degrees
DN
40/50
60
80
100
125
150
200
250
300
350
400
450
500
600
700
800
900
1000
1200
Kv
86
233
284
483
862
1724
2845
4569
6638
9052
12069
15690
18879
26293
41379
53866
72000
86397
111552
All this guarantees a long service life on the one hand, and on the other allows
optimum adaptation of the valve, which can be converted for numerous other
media types and sealing tasks in no time simply by replacing the valve disc and
seal. This easy replacement also reduces maintenance costs, since all the work
can be done directly at the set-up location.
Materials and finishes fact file
•Body: Spheroidal graphite cast iron EN-JS1030
•Valve disc: central mounting, made of spheroidal graphite cast iron EN-JS1030
or stainless steel 1.4408, further options on request
•Valve shaft: steel 1.4021.05
•Shaft bearing: nylon and PTFE
•Profiled sealing ring: EPDM for drinking water or NBR for gas, further
options on request
•Corrosion protection: epoxy resin coating with ERHARD EKB fusion bonded
epoxy for the body as well as valve discs made of cast iron, layer thickness at
least 150 µm, further coatings on request
•Certificate: DVGW approval for drinking water
ERHARD ECLI butterfly valve
5
Perfect solutions
in every installation situation
Wafer type
Lug type
Flange type
ERHARD ECLI butterfly valves are available in three versions, guaranteeing a
perfect connection to the pipe:
•“Wafer type” for clamping between the two flange ends of the pipe [1].
•“Lug type” with threaded eyelets for two-sided flange-mounting to the pipe
[2]. This version can also be used as an end-of-line valve which is then only
screwed in place on one side.
•“Flange type” with two flanges for connection with the flange ends of the
pipe. Here, either nuts and bolts can be used separately for each ring [3] or
threaded rods can be used through both flanges [4].
6
ERHARD ECLI butterfly valve
1
2
3
4
ERHARD ECLI butterfly valves can be used for numerous applications e.g. in seawater
desalination pants or in plant engineering.
Notes on installation and mounting
The following points must be heeded when mounting ERHARD ECLI butterfly
valves in pipes:
•The distance between the flanges must be large enough for the butterfly valve
to be pushed in without displacing the seals [5] or having longitudinal forces
acting on them. The valve disc must be in the slightly open position shown in
the drawing. The butterfly valve must not be either closed or fully open during
mounting.
5
•The flanges must be mutually parallel in order to guarantee perfect contact
with the butterfly valve after tightening.
•When the butterfly valve is already mounted, the flanges must not be welded
with the pipe since the heat produced by the welding process can damage the
seals.
•The butterfly valve is opened completely before the flange screw attachment
is tightened [6] in order to guarantee trouble-free operation.
•ERHARD ECLI butterfly valves can be installed in both vertical and horizontal
6
pipes and are fully functional independently of the direction of flow. For sizes
larger than DN 300 we recommend a horizontal position for the drive shaft.
ERHARD ECLI butterfly valve
7
All sizes at a glance
Feather key
Size
DN
A
B
E
l
J
SW
125
125
140
156
161
181
195
210
237
262
300
340
360
390
420
495
575
33
33
43
46
46
52
56
56
60
68
78
78
102
114
127
154
165
22
22
22
21
21
21
20
22
22
28
28
27
27
36
36
46
90
11
11
11
11
11
11
14
14
17
22
22
27
27
36
36
46
80
125
125
140
156
161
181
195
210
237
262
300
33
33
43
46
46
52
56
56
60
68
78
22
22
22
21
21
21
20
22
22
28
28
11
11
11
11
11
11
14
14
17
22
22
340
360
390
420
495
575
620
690
750
795
865
78
102
114
127
154
165
190
203
216
216
260
27
27
36
36
46
90
90
116
123
123
136
27
27
36
36
46
a
b
Connecting flange
ISO
K
d3
d4
5211
Bore hole acc. to PN 10
Bore hole acc. to PN 16
d5
d6
M
Anz
d5
d6
M
Anz
Wafer type
32
40
50
65
80
100
125
150
200
250
300
350
400
450
500
600
700
181
181
202
225
253
288
310
340
394
464
540
620
662
736
790
960
1110
150
150
175
175
210
300
50
50
50
50
50
50
70
70
70
102
125
125
125
140
140
165
254
6,5
6,5
6,5
6,5
6,5
6,5
8,5
8,5
8,5
11
14
14
14
18
18
22
18
F05
F05
F05
F05
F05
F05
F07
F07
F07
F10
F12
F-12
F-12
F-14
F-14
F-16
F-25
565
620
725
840
M24
M24
M27
M27
4
4
4
4
585
650
770
840
M27
M30
M33
M33
4
4
4
4
50
50
50
50
50
50
70
70
70
102
125
6,5
6,5
6,5
6,5
6,5
6,5
8,5
8,5
8,5
11
14
F05
F05
F05
F05
F05
F05
F07
F07
F07
F10
F12
100
110
125
145
160
180
210
240
295
350
400
M16
M16
M16
M16
M16
M16
M16
M20
M20
M20
M20
4
4
4
4
8
8
8
8
8
12
12
100
110
125
145
160
180
210
240
295
355
410
M16
M16
M16
M16
M16
M16
M16
M20
M20
M24
M24
4
4
4
4
8
8
8
8
12
12
12
125
125
140
140
165
254
254
254
254
254
298
14
14
18
18
22
18
18
18
18
18
22
F-12
F-12
F-14
F-14
F-16
F-25
F-25
F-25
F-25
F-25
F-30
460
515
565
620
725
840
950
1050
1160
1270
1380
M20
M24
M24
M24
M27
M27
M30
M30
M33
M33
M36
12+4
12+4
16+4
16+4
16+4
20+4
20+4
24+4
24+4
28+4
28+4
470
525
585
650
770
840
950
1050
1170
1270
1390
M24
M27
M27
M30
M33
M33
M36
M36
M39
M39
M45
12+4
12+4
16+4
16+4
16+4
20+4
20+4
24+4
24+4
28+4
28+4
Lug type
32
40
50
65
80
100
125
150
200
250
300
181
181
202
225
253
288
310
340
394
464
540
Flange type
350
400
450
500
600
700
800
900
1000
1100
1200
8
620
662
736
790
960
1110
1245
1380
1500
1570
1714
ERHARD ECLI butterfly valve
80
80
95
95
95
100
22
22
28
28
28
28
7
7
8
8
8
8
150
150
175
175
210
300
300
300
300
300
350
23
27
27
27
30
30
33
33
36
36
40
27
30
30
33
36
36
39
39
42
42
49
“Wafer type“ for clamping
“Lug type“ for flange-mounting
“Flange type“ with double flange
ERHARD ECLI butterfly valve
9
Flexible drives,
low torques
ERHARD ECLI butterfly valves can be combined with numerous drive options,
irrespective of the connection variant. Here are only a few examples:
•The aluminium hand lever [1] is a simple and low-cost solution particularly
for small sizes up to DN 200; the lever can be turned through 90 degrees and
be safely locked in the OPEN and CLOSED positions.
•For greater torques in manual operation, the use of a worm gear drive with
corresponding handwheel is recommended [2].
•For applications where very high torques are involved or if the butterfly valve
is to be opened and closed by remote control e. g. by means of complex control technology, ERHARD ECLI butterfly valves are also available with electric
drives [3].
1
2
3
Numerous accessories are available for
All the drives benefit from the low torques required to actuate the valve, made
ERHARD ECLI butterfly valves e.g. mechan-
possible by the design. The table shows an overview of the torques depending
ical or inductive limit switch boxes, Festo
or Bar cylinders, electric part-turn valve
actuators and other drive options.
on the pressure rating and nominal size. All the values refer to liquid media at
a temperature of 20 °C as well as constant working pressures and conditions. A
safety factor of 30 %, which becomes relevant if the capacity of an electric drive
diminishes, has already been included in the calculation. In the case of gaseous
media and air where the medium does not act as a lubricant, the required torques are around 35 % higher. In addition, the dynamic effects of flowing around
the valve disc must be taken into consideration from nominal sizes greater
than DN 200. Our technical consultants are happy to provide support with your
calculations.
Torques (Nm)
Max.
pressure
32/40
50
65
80
100
125
3
6
10
16
13
14
26
36
39
46
52
65
46
60
450
715
975
1625
2275
500
910
1326
2210
3120
600
1300
1950
3120
4550
650
1690
2470
3770
5460
700
1950
2730
4420
6240
Max.
pressure
3
6
10
16
10
ERHARD ECLI butterfly valve
Size DN
150
200
250
300
60
85
150
169
299
332
900
3250
4550
7800
10140
1000
3900
5850
9750
12350
Size DN
750
800
2210
2470
3250
3510
5200
5850
7410
8190
536
761
350
403
598
988
1391
400
585
845
1300
1820
1100
5850
1430
16250
25350
1200
7410
1651
19812
30160
1400
14920
19344
32240
41912
TALIS – a strong partner
for water and waste water
Our job is to protect water, the element that is vital for life. Together with our
customers and partners, we are living up to this responsibility all over the world.
Our ideas, services and products are the driving force behind this. Using the
latest technologies, we are helping to develop responsible supply and disposal
systems. Exemplary standards guarantee efficiency. Making use of the power,
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both now and in the years to come: for our future – water.
We probably supply the most comprehensive range of products for the water
and waste water industries. But TALIS doesn‘t only stand for innovative products and customer-specific solutions, it also stands for comprehensive services: from qualified technical consultation before purchase through installation and on-site training to service after installation and during the valve’s whole
service life.
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2) ERHARD CITY fire hydrant
3) ERHARD ROCO Premium butterfly valve
with ERHARD Pro-Enamel
4) ERHARD ABS Premium service valve
with ERHARD Pro-Enamel
5) ERHARD TWIN-AIR air valve
1
2
3
6) ERHARD RKV needle valve
7) ERHARD DVP 4 pressure reducing valve
8) ERHARD ball valve
9) ERHARD ERU K1 knife gate valve
4
7
5
6
8
9
ERHARD ECLI butterfly valve
11
Your Choice in Waterflow Control
TALIS is the undisputed Number One for water transport and water
flow control. TALIS has the best solutions available in the fields of
water and energy management as well as for industrial and communal applications. We have numerous products for comprehensive
solutions for the whole water cycle – from hydrants, butterfly valves
and knife gate valves through to needle valves. Our experience,
innovative technology, global expertise and individual consultation
processes form the basis for developing long-term solutions for the
ERHARD GmbH & Co. KG
efficient treatment of the vitally important resource “water”.
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Phone: +49 - 7321 - 320 - 0
Fax: +49 - 7321 - 320 - 525
E-mail: export@erhard.de
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