Buying Guide

66
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AHEAD OF THE FLOW
®
Revised 7/20/2018
MATERIAL LIST
PART SPECIFICATION
1. Body Cast Iron ASTM 126 Class B
2. Seat (B) Bronze ASTM B584 Alloy C87600
2a. Seat (W) with Buna-N O-ring
3. Disc Bronze ASTM B584 Alloy C87600
4. Spring Stainless Steel ASTM A313 UNS S31600
5. Bushing Aluminum Bronze B505 C95400
6. O-Ring EPDM
Lead-Free
*
Class 125/250 Iron Body Silent Check Valves
Wafer Style • Renewable Seat and Disc • Spring Actuated (1/2 PSI cracking pressure)
Class 125, 200 PSI/13.8 bar non-shock cold working pressure
Class 250, 400 PSI/27.6 bar non-shock cold working pressure
Maximum temperature to 200°F/93°C
W910-B-LF — 2" thru 10" ONLY
CERTIFIED LEAD-FREE* BY WQA TO NSF/ANSI 372
NSF/ANSI 61 CERTIFIED BY UL
CONFORMS TO MSS SP-125 • FM APPROVED
W-910-LF 125 lb. Class
W-960-LF 250 lb. Class
DIMENSIONS—WEIGHTS
Dimensions
Size A B W-910 W-960
In. mm. In. mm. In. mm. Lbs. Kg. Lbs. Kg.
*2 50 4.25 108 2.63 67 6 5 6 3
*2¹⁄₂ 65 5.00 127 2.88 73 7 3 7 3
*3 80 5.75 146 3.13 79 12 5 12 5
*4 100 7.00 178 4.00 102 18 8 18 8
*5 125 8.38 213 4.75 121 27 12 27 12
*6 150 9.75 248 5.50 140 42 19 42 19
8 200 13.38 340 6.50 165 †85 39 86 39
10 250 16.00 406 8.25 210 †99 45 ‡137 62
* NOTE: Sizes 2" thru 6" have dual class ratings (125 lb. and 250 lb.)
resulting in W-910-LF and W-960-LF being identical. 8" and 10"
have special machining in accordance with Flange Class.
Class 125 only.
Class 250 only.
WARNING: 1. These are not to be used as steam valves.
2. Valves are not to be used near a reciprocating air
compressor.
3. Do not install in vertical line with downward flow.
Note: On pump discharge, the preferred check valves are:
- inline, spring assisted, center-guided, lift checks
- spring assisted twin (double) disc
- swing design with lever and weight or lever and spring
COMPONENT
LEAD-FREE
Install 5 pipe diameters minimum downstream from pump discharge or
changes in direction to avoid flow turbulence. Flow straighteners may be
required in extreme cases.
Note: W-960-LF 8" and 10" not FM approved.
*Weighted average lead content ≤ 0.25%
WATER QUALITY
NSF 61 CERTIFIED
W-910-W-LF/W-960-W-LF
Wafer
W-910-B-LF/W-960-B-LF
Wafer
(W)
(B)
W-910-B-LF/W-960-B-LF
Wafer
WARNING: This product can expose you to chemicals including
lead, which is known to the State of California to cause cancer
and birth defects or other reproductive harm. For more information
go to www.P65Warnings.ca.gov.