Buying Guide
67
NIBCO INC. WORLD HEADQUARTERS • 1516 MIDDLEBURY ST. • ELKHART, IN 46516-4740 • USA • PH: 1.800.234.0227
TECH SERVICES PH: 1.888.446.4226 • FAX: 1.888.336.4226 • INTERNATIONAL OFFICE PH: +1.574.295.3327 • FAX: +1.574.295.3455
www.nibco.com
Visit www.nibco.com for current Chem-Guide and galvanic potential in piping systems information.
www.nibco.com
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 2½” - 10” - Bronze ASTM B584 Alloy C87600
12” - 36” - Class 250 Alloy ASTM B148 C95500
4. Spring Stainless Steel ASTM A313 UNS S31600
5. Bushing Aluminum Bronze B505 C95400
6. Set Screws
†
Stainless Steel Type 316 ASTM F879
Lead-Free
*
Class 125/250 Iron Body Silent Check Valves
Flanged • Globe Style • Renewable Seat and Disc • Spring Actuated (1 / 2 PSI cracking pressure)
1
Class 125, 200 PSI/13.8 bar non-shock cold working pressure
2
Class 250, 400 PSI/27.6 bar non-shock cold working pressure
Maximum temperature to 200°F/93°C
CERTIFIED LEAD-FREE* BY WQA TO NSF/ANSI 372 •
NSF/ANSI 61 CERTIFIED BY UL •
CONFORMS TO MSS SP-125 • CONFORMS TO MIL-V-18436F •
FM APPROVED — 2
1
/2" thru 10" ONLY (F-910-B-LF)
F-910-LF, 125 lb. Class
F-960-LF, 250 lb. Class
Flanged
F-910-B-LF or F-960-B-LF
Flg x Flg Flg x Flg
F-910-W-LF or F-960-W-LF
Flg x Flg Flg x Flg
DIMENSIONS—WEIGHTS
Dimensions
Size A F-910-LF F-960-LF
In. mm. In. mm. Lbs. Kg. Lbs. Kg.
2¹⁄₂ 65 5.50 140 24 11 30 14
3 80 6.00 152 29 13 36 16
4 100 7.25 184 42 19 59 27
5 125 8.50 216 52 24 78 35
6 150 9.75 248 73 33 103 47
8 200 12.50 318 126 57 179 81
10 250 15.50 394 205 93 253 115
12 300 14.25 362 306 139 401 182
14 350 15.75 400 350 172 511 232
16 400 17.63 448 501 227 697 316
18 450 18.75 476 724 328 959 435
20 500 20.63 524 890 404 1180 535
24 600 24.00 610 1220 553 1680 762
30 750 29.25 743 2000 907 2375 1077
36 900 45.00 1143 4421 2005 5511 2500
1
14" - 36" sizes - Class 125, 150 psi/10.3 bar CWP
2
14" - 36" sizes - Class 250, 300 psi/20.7 bar CWP
† 2½" - 12" : No Set Screws
NOTE: F-910-LF made to 125 lb. Flange dimensions.
F-960-LF made to 250 lb. Flange dimensions.
A Wafer Style Butterfly Valve can be mated on the down stream side of the F-910-LF 2¹⁄₂"–10" sizes
without use of spacers or adapters. 316 Stainless Steel Trim available – Consult Factory.
USE THIS VALVE ONLY WITH FLAT FACE FLANGE AND FULL FACE GASKET.
WARNING: 1. Seat end of valves 14" and larger must be mated to a standard flat faced metal flange.
Rubber flanges not acceptable.
2. These are not to be used as steam valves.
3. Valves are not to be used near a reciprocating air compressor.
4. 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
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.
COMPONENT
LEAD-FREE
*Weighted average lead content ≤ 0.25%
WATER QUALITY
NSF 61 CERTIFIED
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.