Page 1
WAFER SILENT
CHECK VALVES
- 196 -
125WC SERIES
CAST IRON
WAFER SILENT CHECK VALVES
Pressures to 200 PSIG (13.8 barg)
Temperatures to 300ºF (149ºC)
●ASME Class 125 rated check valves
● Designed to reduce surge and water hammer
● Silent, non-slam closure
● Center guided at both ends to prevent binding
and cocking
● Compact face to face legnth for space saving
● Wafer body style fits between FF or RF flanges
MODELS
● 125WCIB - Cast Iron Body, Bronze Disc
● 125WCIT – Cast Iron Body, Stainless Steel Disc
OPTIONS
(Consult factory)
● EPDM Seats
● Other Spring Material
● Heavier or Lighter Springs
A
PPLICABLE CODES
●ASME Sec VIII and B16.1 Bodies
● API 598
Canadian Registration - OC10274.5C
APPLICA TIONS
●Liquid Service
● Process Industry
● Power Industry
● Chemical Industry
● Oil & Gas
● Pulp & Paper
● Metal & Mining
● Water & Waste
0 8 0 0 - 1 2 5 W C I B M - T
123456789101112131415
Inlet Size
Model
Dash Seat Dash Spring
125WC Series Ordering Code
Dash - Position 5
Model - Position 6 - 12
125WCIB - Cast Iron Body, Bronze Disc
125WCIT - Cast Iron Body, Stainless Steel Disc
Seat - Position 13
M - Metal
Dash - Position 14
Spring - Position 15
T - Stainless Steel
Inlet Size - Position 1 - 4
0200 - 2"
0250 - 2
1
⁄2"
0300 - 3"
0400 - 4"
0500 - 5"
0600 - 6"
0800 - 8"
1000 - 10"
1200 - 12"
PRESSURE/TEMPERATURE CHART
ASME 16.1
250
200
150
125# CI 2"-12"
100
Pressure (psi)
50
0
-50
EPDM O-Ring
250
50
0
100
150
200
300
350
Temperature (F)
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WAFER SILENT
CHECK VALVES
- 197 -
125WC SERIES
CAST IRON WAFER SILENT CHECK VALVES
SPECIFICATION
Check Valve shall be single disc design with Cast Iron wafer body style designed
to ASME Sec. VIII and ASME B16.1. The check valve shall have a metal to metal
seat with bronze or SS discs and be center guided from both ends. The check
valve shall be ASME Class 125 rated. The spring shall be 316SS. The check
valve shall be SSI 125WC Cast Iron Series.
MATERIALS OF
CONSTRUCTION
Body ……………………………………………………A126-B Cast Iron
Discs …………………………Al/Bz B148 C954 or 316SS A351-CF8M
Seat …………………………………………………………Bronze or SS
Spring ………………………………………………………………316SS
O-Ring ………………………………………………………………EPDM
Connections: 2" to 12" Flanged FF
DIMENSIONS inches (mm) AND WEIGHTS pounds (kg)
Seats: 2" to 12"
Bronze or Stainless Steel
Cracking Pressure:
Horizontal Mounting - .3 psid
Vertical Mounting - .75 to 1.25 psid
Stud Selection
Size A B* QTY Dia. Length Weight
2211⁄
16 4
1
⁄
8 4
5
⁄
8 6
1
⁄
2 5
(50) (68) (105) (16) (165) (2.3)
21⁄
2 2
7
⁄
8 4
7
⁄
8 4
5
⁄
8 6
3
⁄
4 8
(65) (73) (124) (16) (171) (3.6)
33 3⁄
16 5
3
⁄
8 4
5
⁄
8 7 10
(80) (81) (137) (16) (178) (4.5)
4 4 67⁄8 8
5
⁄8 8 19
(100) (103) (175) (16) (203) (8.6)
54
5
⁄8 73⁄4 8
3
⁄4 83⁄4 30
(125) (118) (197) (19) (222) (13.6)
65
9
⁄16 83⁄4 8
3
⁄4 101⁄2 42
(150) (142) (222) (19) (267) (19.1)
86
1
⁄2 11 8
3
⁄4 111⁄4 87
(200) (165) (279) (19) (286) (39.5)
10 87⁄32 133⁄8 12
7
⁄8 121⁄4 146
(250) (209) (340) (22) (311) (66.2)
12 111⁄4 161⁄8 12
7
⁄8 161⁄2 304
(300) (286) (410) (22) (419) (137.9)
*Add the “B” dimension and the diameter of the stud to
achieve the ANSI B16.5 Bolt Hole Circle Diameter
B
A
FLOW
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WAFER SILENT
CHECK VALVES
- 198 -
125WC SERIES
WAFER SILENT CHECK VALVE
PRESSURE DROP VS FLOW RATE
(Sizes 2" - 12")
Installation Note:
1. For correct installation and maintenance please see our I&M manual.
2. Vertical installation (downward flow) – Consult factory.
3. Always use Strainers in upstream piping.
4. Not recommended for Steam Service
Size (inches) 2 21⁄
2 345681012
Min Cv (@ .3 PSID) 51 84 119 179 265 383 639 1114 1604
Cv (@ 1 PSID) 58 90 134 210 300 430 740 1250 1800
Max Cv (@ 10 PSID) 73 106 168 285 391 548 964 1581 2277
Cv Values
10
VALVE CRACKING PRESSURE
HORIZONTAL MOUNTED
(1) Pressure drop curves are based on water flow.
(2) Valve cracking pressure is equal to or less than 0.3 psid when mounted horizontally.
(3) Valve cracking pressure increases to between 0.75 and 1.25 psid when installed
vertically with flow upwards.
1
PRESSURE DROP (psi)
0.1
10
2
3
5
4
2-1/2
6
8
10
12
100
FLOW RATE (GPM)
1000
10000
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