Buying Guide
87
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 2/12/2020
Class 150 Ductile Iron Body Swing Check Valves
Raised Face Flanges • Bolted Bonnet • Bronze Trim
285 PSI/19.7 bar non-shock cold working pressure to -20°F to 100°F/-29°C to 38°C
t
Maximum working temperature 450°F/232°C at 185 PSI/12.6 bar
150 PSI/10.3 bar saturated steam to 366°F/186°C
CONFORMS TO MSS SP-136
F-938-31
Flanged-Raised Face
F-938-31
Flg x Flg
MATERIAL LIST
PART SPECIFICATION
1. Bolt Steel ASTM A193 B7/SAE J429 Grade 8
2. Identification Plate Aluminum
3. Bonnet Ductile Iron ASTM A395
4. Body Gasket Synthetic Fibers
5. Nut Steel ASTM A194 2H/SAE J995 Grade 8
6. Side Plug Brass ASTM B584 C84400
7. Hanger Pin Brass ASTM B371 C69430/C69400
8. Hanger Ductile Iron ASTM A536
9. Disc
1
Brass ASTM B584 C84400
10. Seat Ring Brass ASTM B584 C84400
11. Disc Nut Brass ASTM B371 C69430/C69400
12. Body Ductile Iron ASTM A395
13. Disc Bolt
1
Brass ASTM B371 C69430/C69400
1
2"-4" bronze disc
5"-12" ductile iron disc with bronze face ring and disc bolt
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 81 37
5 125 13.00 330 6.81 173 10.00 254 .94 24 100 45
6 150 14.00 356 8.00 203 11.00 279 1.00 25 146 66
8 200 19.50 495 9.44 240 13.50 343 1.13 29 255 116
10 250 24.50 622 12.06 306 16.00 406 1.19 30 426 193
12 300 27.50 699 16.13 410 19.00 483 1.25 32 660 299
Lever and Weight/Spring Options available only in 3", 4" and 6". (see page 102)
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
®
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 repro-
ductive harm. For more information go to www.P65Warnings.ca.gov.