Buying Guide

63
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
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AHEAD OF THE FLOW
®
Revised 4/20/2020
MATERIAL LIST
PART SPECIFICATION
1.
Body Bolt Steel ASTM A307
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 Brass ASTM B16 Alloy C36000
7. Hanger Pin Brass ASTM B16 Alloy C36000
8.
Hanger Ductile Iron ASTM A536
Brass ASTM B584 Alloy C84400
9.
1
Disc or ASTM A536 Ductile Iron with
Brass Face Ring
10. Seat Ring Brass ASTM B584 Alloy C84400
11. Disc Nut Brass ASTM B16 Alloy C36000
12. Body Cast Iron ASTM A126 Class B
13.
1
Disc Bolt Brass ASTM B16 Alloy C36000
14. Disc Plate** Cast Iron ASTM A126 Class B
15. Disc Cage** Cast Iron ASTM A126 Class B
1
2" thru 4" have Bronze ASTM B584 Disc.
5" thru 12" have Iron Disc with Bronze Disc Face Rings and Disc Bolt.
**These items are not in the -B, only the -W and -Y.
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 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
T-918-B
Threaded
F-918-B
Flanged
F-918-B
Flg x Flg
T-918
NPT x NPT
Buna-N Disc Shown
DIMENSIONS—WEIGHTS—QUANTITIES
Dimensions
F-918-B T-918-B
Size A A B D E F-918-B T-918-B
In. mm. In. mm. In. mm. In. mm. In. mm. In. mm. Lbs. Kg. Lbs. Kg.
2 50 8.00 203 6.50 165 3.94 100 6.00 152 .63 16 24 11 15 7
2¹⁄₂ 65 8.50 216 7.50 191 4.50 114 7.00 178 .69 17 35 16 26 12
3 80 9.50 241 8.00 203 5.13 130 7.50 191 .75 19 47 21 31 14
4 100 11.50 292 9.38 238 6.13 156 9.00 229 .94 24 80 36 54 24
5 125 13.00 330 x x 6.81 173 10.00 254 .94 24 100 45 80 36
6 150 14.00 356 x x 8.00 203 11.00 279 1.00 25 146 66 121 54
8 200 19.50 495 x x 9.44 240 13.50 343 1.13 29 274 124 x x
10 250 24.50 622 x x 12.06 306 16.00 406 1.19 30 426 193 x x
12 300 27.50 699 x x 16.13 410 19.00 483 1.25 32 675 306 x x
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
*Proper machining facilities required.
2¹⁄₂" thru 12" are available 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 chemi-
cals 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.