Buying Guide
64
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
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www.nibco.com
AHEAD OF THE FLOW
®
Revised 4/20/2020
MATERIAL LIST
PART SPECIFICATION
1.
Body Bolt Steel ASTM A307/SAE J429
2. Identification Plate Aluminum
3. Bonnet Cast Iron ASTM A126 Class B
4. Body Gasket Synthetic Fibers
5.
Body Nut Steel ASTM A563
6. Side Plug Steel ASTM A307
7. Hanger Pin Steel ASTM A 108 1214L
8. Hanger Ductile Iron ASTM A536
9.
Disc
Cast Iron ASTM A126 Class B
or ASTM A536 Ductile Iron (2"–4")
10. Seat Ring Cast Iron ASTM A126 Class B
11. Disc Nut Steel ASTM A563
12. Body Cast Iron ASTM A126 Class B
13.
1
Disc Bolt Mild Steel (not shown)
1
5" thru 12" only.
NOTE: NIBCO may substitute Ductile Iron ASTM A395 (60-40-18) for ASTM A126 Class
B Cast Iron for the Body, Bonnet, Wedge, or Disc. NIBCO may substitute Ductile
Iron ASTM A395 (60-40-18) or ASTM A536 (65-45-12) for all other ASTM A126
Class B Cast Iron components.
Class 125 Iron Body Check Valves
Bolted Bonnet • Horizontal Swing • Renewable Iron Seat and Disc*
200 PSI/13.8 bar non-shock cold working pressure to -20°F to 150°F/-29°C to 66°C
t
Maximum working temperature 450°F/232°C at 125 PSI/8.6 bar
125 PSI/8.6 bar saturated steam to 353°F/178°C
CONFORMS TO MSS SP-71 TYPE 1
F-918-N
Flanged
F-918-N
Flg x Flg
DIMENSIONS—WEIGHTS—QUANTITIES
Dimensions
Size A B D E Weight
In. mm. In. mm. In. mm. In. mm. In. mm. Lbs. Kg.
2 50 8.00 203 3.94 100 6.00 152 .63 16 24 11
2¹⁄₂ 65 8.50 216 4.50 114 7.00 178 .69 17 35 16
3 80 9.50 241 5.13 130 7.50 191 .75 19 47 21
4 100 11.50 292 6.13 156 9.00 229 .94 24 80 36
5 125 13.00 330 6.81 173 10.00 254 .94 24 99 45
6 150 14.00 356 8.00 203 11.00 279 1.00 25 147 67
8 200 19.50 495 9.44 240 13.50 343 1.13 29 254 115
10 250 24.50 622 12.06 306 16.00 406 1.19 30 424 192
12 300 27.50 699 16.13 410 19.00 483 1.25 32 646 293
*Proper machining facilities required.
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.
NIBCO Iron Body Check Valves may be installed in both horizontal and vertical lines with
upward flow or in any intermediate position.
WARNING: Do not use for Reciprocating Air Compressor Service.
t For detailed Operating Pressure, refer to Pressure Temperature Chart on page 114.
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.