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Item 375-376-377 butterfly valve

Item 375-376-377 butterfly valve

Cast iron butterfly valve for mounting between flanges, “Wafer” type

ITEM 375
Body: Cast iron
Butterfly: Cast iron
Liner: see table
ITEM 376
Body: Cast iron
Butterfly: CF8M (316 S.S.)
Liner: see table
ITEM 377
Body: Cast iron
Butterfly: Bronze aluminium
Liner: see table

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  • benefits
  • features
  • dimensions
  • materials
  • diagrams and breakaway torque
  • specifications
  • documents

1. EN ISO 5211 top mounting
Easy coupling with every kind of drives.

2. Three guiding bushings on the shaft
It grants a perfect alignment of the shaft on the body and prevents oscillations even with high pressure.
Less friction between the shaft and body.

3. Vulcanized liner on rigid ring
Less deformation of the liner
Easy assembly / disassembly of the liner for maintenance
No deformation of the liner between the flanges during assembly
Greater dimensional accuracy during the injection/molding

4. Shaft in 2 pieces without fixing components
Easy assembly / disassembly of the disc for maintenance
Higher Kv thanks to the central section of the disk thinner than a valve with a single shaft

5. Lapped surface of the disc's circumference
Better tightness and less wear of the liner
Lower torque due to less friction between the disc and liner

Wide range of LINER materials
Various applications possibility

ATEX Certificate
Installation is allowed in a potential explosive environment

PED Certificate
Full compliance with European Safety Standards for Pressure Equipment

GENERAL FEATURES:
OMAL butterfly valves, available in wafer or lug version from DN 40 to DN 600 (lug DN 300), are designed and manufactured to be used in most applications in all industrial fields.
- General requirements in accordance with UNI EN593
- Face to face as per EN 558 series 20
- Tightness at 16 bar according to EN 12266-1 rate A
- Integral sealing (with liner vulcanized on hard ring) which avoids any contact between fluid and valve body.
- Sealing design allowing perfect adherence to the valve body and perfect tightness to the flanges, without additional parts. Clamping between flanges does not influence the torque of the valve.
- Lapped disc edges that allows better tightness, reduced torque and low wear of the liner.
- Bushes to support the shaft.
- Coupling between stem and disc with two shafts (better Kv) carried out with no additional fittings (e.g. screws, bolts, pins, etc.) to avoid any risk of corrosion and breaking.
- Valve neck with top work as per EN ISO 5211 for easy connections with all different types of actuators.
- All components properly treated against corrosion.
OMAL will be free to change all specifications and data included in this catalougue at any time, so as to improve the quality and the performance of its products.

STANDARD EXECUTIONS:
• Standard flanges:
PN 10 - PN 16 - ANSI 150 from DN 40 to DN 300.
PN 10 from DN 350 to DN 600.
• General requirements in accordance with UNI EN593
• Face to face as per EN 558 serie 20
• Valve head as per ISO 5211 ( DN40-DN300 )
• Tightness as per EN 12266-1 rate A
• Other tests on request.
• Operating Temperature of liners:
EPDM: from -25°C to +135°C;
NBR: from -23°C to +82°C;
FKM: from -10°C to +190°C (DN40-DN300);
PTFE (on EPDM core): from -25°C to +150°C (DN40-DN300).
• Working pressure between flanges:
PN 16 bar for DN 40 to DN 300
PN 10 bar for DN 350 to DN 600
• Thickness of epoxy coating: 160 ÷ 200 μ. RAL: 5015.

ON REQUEST:
• Working temperature for special liners:
SILICONE: from -25°C to +160°C;
NBR CARBOX: from -10°C to +82°C;
NBR WHITE for food: from -23°C to +82°C;
HNBR: from -20°C to +120°C
• For other applications, please contact our sales department.

CERTIFICATIONS:

• According to 2014/68/EU “PED”.
• DVGW homologation for gas (V376).
• RINA homologation.
• Conformity to the italian D.M.n°174 suitable with drinking water and alimentary fluid (V376).
• ATEX version in conformity with European Directive 2014/34/EU.
• ATEX certificate on request.

 DIMENSIONS
SIZEABØCØDØEØF□G□G’ØHØILMNPQRR’SS’ØTU
DN [mm][inch]
DN 401"1/2333650706,58,59
11098,5R10R9
7012531
9
14,2116
DN 502"434650706,58,59
125121R10R10,5
8014031
9
14,2128
DN 652"1/2464950706,58,511
145140R10R10,5
8615233
11
14,2143
DN 803"464950706,58,511
160153R10R10,5
95,515933
11
14,2153
DN 1004"525650706,58,511
191180R10,5R10
10817833
11
14,2175
DN 1255"565970
8,5
14
216210R12,5R10
124,5190,536
14
19197
DN 1506"565970
8,5
14
242240R12,5R12
13720336
14
19222
DN 2008"606470
8,5
17
299295R12,5R12
16623839
17
22,2279
DN 25010"6872102125111322
362350R14R13,5
19926855
22
28,5340
DN 30012"7881,5102125111322
432400R14R13,5
23430655
22
28,5410
DN 35014"7882




22
460

M20293352
55
2228,5446
DN 40016"102105




27
515

M24325388
60
2736,5508
DN 45018"114118




27
565

M24348415
60
2736,5543
DN 50020"127130,5




36
620

M24386,5441
70
3648,5600
DN 60024"154158




36
725

M27447,5505
70
3648,5718
N.B. :  G’, R’, S’ DIMENSIONS REFERRED TO ∆P max 10 bar VALVES

Cast iron body with lever

  DIMENSIONS CAST IRON BODY WITH LEVER
  SIZE
A
B
øC
D
Kg
DN [mm]
[inch]
DN 40
1"1/2
188
70
90
160
2,2
DN 50
2"
203
80
90
160
3,0
DN 65
2"1/2
225
86
90
220
3,8
DN 80
3"
230
95,5
90
220
4,0
DN 100
4"
250
108
90
220
5,1
DN 125
5"
277
124,5
90
350
7,8
DN 150
6"
290
137
90
350
9,2
DN 200
8"
325
166
90
350
13,3
DN 250
10"
395
199
175
500
25,1
DN 300
12"
432
234
175
500
34,5

LEVER FEATURES

10-position lever; lockable in each position
Material: Aluminium;
Surface coating: polyester
Weight: from 0,3 to 0,9 Kg.

Cast iron body with gear box

  DIMENSIONS CAST IRON BODY WITH GEAR BOX
  SIZE
A
B
C
D
øE
F
G
H
I
L
M
Kg
DN [mm]
[inch]
DN 40
1"1/2
200
49
24
80
140
115
42
35
171,2
70
160
3,3
DN 50
2"
200
49
24
80
140
115
42
35
185,9
80
160
4,1
DN 65
2"1/2
200
54
27
100
200
130
50
40
201,6
86
150
5,7
DN 80
3"
200
54
27
100
200
130
50
40
208
95,5
150
6
DN 100
4"
200
54
27
100
200
130
50
40
227
108
150
7
DN 125
5"
200
54
27
100
200
130
50
40
239,7
124,5
150
9,4
DN 150
6"
200
54
27
100
200
130
50
40
252,4
137
150
10,7
DN 200
8"
250
70,5
40,5
140
300
175
60
60
300,7
166
180
17,4
DN 250
10"
250
70,5
40,5
140
300
175
60
60
342
199
180
28
DN 300
12"
250
70,5
40,5
140
300
175
60
60
380
234
180
37,5
DN 350
14"
250
70,5
40,5
140
300
175
60
60
425,5
293
180
56
DN 400
16"
421
102
48
220
300
258
105
75
461
325
301
95
DN 450
18"
421
102
48
220
300
258
105
75
488
348
301
112
DN 500
20"
456
102
48
220
500
258
105
75
514
386,5
346
141
DN 600
24"
456
102
48
220
600
258
105
75
578
447,5
346
205

GEAR BOX FEATURES
Designed tested mechanism, working through pinion and worm.
Visual indicator gives the position of the valve
Aluminium alloy carter for the gear box “RF0 " type, cast iron for the gear box “RRM..." Type
Cast iron pinion.
Worm gear in hardened steel.
Steel wheel.
Epoxy painted external surface.

 MATERIALS
1
Body
A536 65-45-12 (GGG50) (Equivalent to EN-GJS-450-10 EN-JS 1040)
2
Disc
A536 65-45-12 (GGG50) - A351 CF8M (316 S.S.)
3*
Liner
EPDM-NBR
4
Upper shaft
A276 S42000 (420 S.S.) (Equivalent to X20CR13; 1.4021)
5
Lower shaft
A276 S42000 (420 S.S.) (Equivalent to X20CR13; 1.4021)
6*
Lower O-ring
EPDM-NBR (a with part. 3 in   FKM)
7*
Upper bush
Epoxy resin
8
Shaft bush
Epoxy resin with PTFE from DN40 to DN300, Bronze from DN350 to DN600
9*
Elastic pin
Stainless steel
10*
Shaft O-ring
EPDM-NBR
*Components of spare part kit KGF.
If other valve materials are required, please contact our offices.

BODY
DN40 - 600
CAST IRON A536 65-45-12 *
EPOXY COATED
CAST IRON A536 65-45-12
RILSAN COATED

STEM
STAINLESS STEEL A276 S4200 *
STAINLESS STEEL A564 TP 630

DISC
DN40 - 600

CAST IRON A536 65-45-12*
CHEMICAL NICKEL PLATING
DN40 - 300
CAST IRON A536 65-45-12
EPOXY COATED
CAST IRON A536 65-45-12
RILSAN COATED
STAINLESS STEEL A351-CF8M (316 S.S.)*
STAINLESS STEEL A351-CF8M (316 S.S.) POLISHED
STAINLESS STEEL A351-CF3M
STAINLESS STEEL A351-CF3M POLISHED
STAINLESS STEEL A351-CF8M (316 S.S.)
F46 COATED
BRONZO/ALLUMINIO B148C95400 *

LINER
DN40 - 600

EPDM*
NBR*
DN40 - 300
FKM*
PTFE ON EPDM*
NBR*
WHITE NBR
POTABLE WATER WHITE NBR
HNBR
CARBOX NBR
SILICONE

MATERIAL APPLICATIONS
MATERIAL
FEATURES
APPLICATIONS
CAST IRON A536 65-45-12
Mechanical strength as good as stainless steel
General applications
Used as a standard for body and disc
BRONZE - ALUMINIUM
Good corrosion resistance
Corrosive fluids, sea water
RILSAN COATED
Excellent corrosion resistance
General applications
Used as a standard for body and disc
STAINLESS STEEL A351-CF8M
Excellent corrosion resistance
Food, chemical, pharmaceutical...etc
EPDM
Temperature limits (°C): -50°/+150°. Operating temperature (°C):
-40°/+135. Unsuitable for hydrocarbons.
Water (soft, sea, glycolic and industrial), steam, ozone, bases and diluted acids, acetic solvents, alcohol, caustic soda, atmospheric agents.
NBR
Good abrasion/wear resistance. Good chemical and mechanical srenght to mineral oils, some hydrocarbons and aliphatic solvents. Operating temperature (°C): -23
/ + 82. Unsuitable for acetone, ketones, nitrates and chlorinated hydrocar- bons.
General applications, compressed air, cold water, hydraulic fluids, methane, butane, petroleum, sea water,
abrasive materials for pneumatic circuits, animal and vegetables fats.
WHITE NBR
Good abrasion/wear resistance. Good chemical and mechanical srenght to mineral oils, some hydrocarbons and aliphatic solvents. Operating temperature (°C): -23
/ + 82. Unsuitable for acetone, ketones, nitrates and chlorinated hydrocar- bons.
General applications, compressed air, cold water, hydraulic fluids, methane, butane, petroleum, sea water and abrasive materials for pneumatic circuits.
POTABLE WATER WHITE NBR
Suitable for potable water accordingly to italian law D.L. 174/2004. Operating temperature (°C): -23
/ + 82. Unsuitable for acetone, ketones, nitrates and chlorinated hydrocar- bons.
General applications, compressed air, cold drinking water, hydraulic fluids, methane, butane, petroleum, sea water and abrasive materials for pneumatic circuits.
CARBOX NBR
Good abrasion/wear resistance. Good chemical and mechanical srenght to mineral oils, some hydrocarbons and aliphatic solvents. Operating temperature (°C): -10
/ + 82. Unsuitable for acetone, ketones, nitrates and chlorinated hydrocar- bons.
Abrasive dusts and fluids
HNBR
Good abrasion/wear resistance. Good chemical and mechanical srenght to mineral oils, some hydrocarbons and aliphatic solvents. Operating temperature (°C): -20
/ +120. Unsuitable for acetone, ketones, nitrates and chlorinated hydrocar- bons.
General applications, compressed air, cold water, hydraulic fluids, methane, butane, petroleum, sea water and abrasive materials for pneumatic
circuits.
FKM
Excellent chemical and mechanical strenght to heat, atmospheric agents, benzoic solvents. Gas-proof. Unsuitable for steam and boi- ling water. Operating temperature (°C): -10
/ +190.
Solvents (acetic excluded), solid hydrocarbons, oxygenating fuels, acids, bases, hydraulic fluids, oils.
HIGH TEMPERATURE SILICONE
Excellent chemical and mechanical strenght to steam and superhheated water (150°C).
Operating temperature (°C): -25 / +160.
Air or hot inert gas (Temperature limits (°C): +180), food industry, water, steam.
PTFE ON EPDM
Excellent chemical strnght to solvents and corrosive products. Unsuitable for abrasive fluids, alkaline metals ( potassium, sodium), gaseous fluorine.
Operating temperature (°C): -25 / +150 (only transient use over (°C)
+135).
Very corrosive pruducts for chemical industry and food industry.
NOTE: The table above lists typical features and applications of all “OMAL” products. Nevertheless, if unusual situations occur (i.e. special applications, contacts with particular fluids, extraordinary pressure or temperature conditions, ...) the elements which determine corrosion and abrasion might change and, as a consequence, metal performances might change, too. It is always the customer who has to choose the right material; however, our technical department is willing to meet all customers requests.

    BREAKAWAY TORQUES Nm
Size
DN 40 1"1/2
DN 50
2"
DN 65 2"1/2
DN 80
3"
DN 100
4"
DN 125
5"
DN 150
6"
DN 200
8"
DN 250
10"
DN 300
12"
DN 350
14"
DN 400
16"
DN 450
18"
DN 500
20"
DN 600
24"

PN 10 bar







109
145
218
340
510
680
1020
1300
PN 16 bar
18
18
25
27
35
52
72
142
170
250







Torque can vary depending on temperature and type of fluid; a safety factor of 1.4 must be applied. Torque can drop on high frequency of operations. The actuator/valve sizing, indicated on the following pages, are based for valves to be used with liquids or gaseous fluids, clean, and for medium temperatures. For further information, or different uses please contact our technical department.

Pressure loss-flow diagram

Example of flow-pressure and pressure drop in a 6” (DN. 150) valve with a water flow of 0,1 m3/sec. and a rotation angle of 90°:
1) Determine the point where the valve flow and diameter lines meet
2) Draw a vertical line from the above-mentioned point to the 90° straight line; then draw a horizontal line from this point to the flow-pressure loss scale, where you’ll read the requested value (0,038 bar).
3) Starting from point 1 and going down the fluid speed scale, you’ll read the fluid speed values (5 m/sec.)

Mounting instructions

When the valve is being inserted, the flanges must be at such a distance from one another to make inspection possible without any contacts between flanges and sealing. Meanwhile, the butterfly must be kept in “half-closed” position.

After inserting the valve between the flanges, but before screwing the bolts up, the butterfly must be switched into the “open” position. Otherwise, you might damage or permanently deform the sealing, while closing the valve.

Example of wrong mounting: the flanges are not open enough and the sealing might be damaged.

OMAL butterfly valves are assembled between pipe flanges without other rings and they are centered by means of tie-rods and fixing screws. Their diameter must conform to the following values.
D0 minimum flange diameter necessary for the inspection of the valve (with a perfectly centered valve)
D1 maximum flange diameter which allows the best possible uses
D2 maximum flange diameter which allows uses at low pressure. If you need any other information, please contact our technical department.

  FLANGE SIZE
 Diameter
DN 40
DN 50
DN 65
DN 80
DN 100
DN 125
DN 150
DN 200
DN 250
DN 300
DN 350
DN 400
DN 450
DN 500
DN 600
D0 [mm]
30
36
51
67
93
119
143
196
247
297
329
376
426
475
573
D1 [mm]
45
57
69
82
107
133
154
206
257
310
338
390
441
492
596
D2 [mm]
51
68
80
93
116
148
170
221
276
327
346
399
450
500
602

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