Butt Weld Check Valve Style – B4, B8

Description

The Butt Weld (B4, B8) check valve is a one-piece body machined from bar stock, eliminating porosity concerns and providing uniform density for more consistent welds. Made to ASME/ANSI B16.25 for schedule 40 pipe (B4), or schedule 80 pipe (B8) it carries rugged, dependable Check-All trim with a wide variety of seat materials and cracking pressures to choose from.
Note: Please take sufficient measures when welding to prevent heat build-up and possible damage to the valve seat.

Size & Dimension

Nominal Pipe SizeSize CodeAB*B4 Valve C & DB8 Valve C & DEOrifice Diameter
1/2D2.1615/160.6220.5460.840.348
3/4F2.711-3/160.8240.7421.050.464
1H2.951-1/21.0490.9571.320.593
1-1/4I3.641-7/81.3801.2781.660.890
1-1/2J3.912-1/41.6101.5001.901.135
2K4.362-3/42.0671.9392.381.385
2-1/2L5.003-1/42.4692.3232.881.555
3M5.443-3/43.0682.9003.502.025
4N6.804-3/44.0263.8264.502.560

butt weld check valve
NOTES (DIMENSIONS TABLE)*May be larger.Consult factory for more information.

Available Materials


* 316 Stainless Steel (SS)
* Alloy B (HB)
* Alloy 20 (A2)* Alloy C-276 (HC)
* Carbon Steel (CS)* Alloy 400 or MONEL® (MO)

Pressure Temerature Table

Body MaterialAvailabilityNon-Shock Pressure-Temperature Rating
316/316L Stainless Steel (SS)Standard1/2" - 1"

5000 PSIG
@100°F
(1500 PSIG
for o-ring seats)

1-1/4"
2-1/2"
4000 PSIG
@ 100°F
(1500 PSIG
for o-ring seats)

4"

1500 PSIG @ 100°F
Carbon Steel (CS)
Alloy 20 (A2)Semi-Standard
Alloy C-276 (HC)
Alloy 400 or MONEL® (MO)
Alloy B (HB)Contact the factory for these or other materials.

Seat material and spring material selection may limit the recommended service temperature.
See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.

Flow Data

PRESSURE DROP PSI

SizeCv
1/22.4
3/44.4
16.1
1-1/412.7
1-1/218.8
232.0
2-1/242.5
389.0
4144

FOR WATER AT 72°F

WATER FLOWRATE - GPM

Note: All flow curves and Cv values presume the valves are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.

Valve Weights

SIZEPART NUMBERSS, CS & Alloys
1/2B4D4.6 oz.
3/4B4F9.1 oz.
1B4H15.0 oz.
1-1/4B4I1.7 lb.
1-1/2B4J2.6 lb.
2B4K4.1 lb.
2-1/2B4L6.3 lb.
3B4M8.4 lb.
4B4N15.2 lb.

Valve weights are approximate.

Seat & Cracking Pressure Options

Valve StyleSize RangeBody Materials
Other Options
Allowable Seat Materials
Other Options
Standard Cracking Pressures
Other Options
More Info.
Standard Spring Material
More Info.
B41/2"-
1-1/2"
316L SSAFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
B41/2" -
1-1/2"
C. SteelAFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
B42" - 4"316L SSAFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
B42" - 4"C. SteelAFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
B41/2" - 4"Alloy 20
Alloy C-276
AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy C-276
B41/2" - 4"Alloy 400 or MONEL®AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy 400 or MONEL®
B41/2" - 4"Alloy BAFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy B

For additional information about Check Valves

What is a Silent Check Valve?
What is a Spring Loaded Check Valve?
What is a Poppet Check Valve?

Content missing