Universal Socket Weld Check Valve Style – US

Description

The Universal Socket Weld (US) check valve is a one-piece body machined from bar stock with socket weld ends and designed for a minimum pressure drop. It carries rugged, dependable Check-All trim and there are a wide variety of seat materials and cracking pressures to choose from. This valve series is particularly attractive when weld joints are required. The socket ends are machined to ASME/ANSI B16.11 dimensions.
Note: Please take precautionary measures when welding to prevent heat build-up and possible damage to the valve seat.

Size & Dimension

Nominal Pipe SizeSize CodeAB*C**D**Orifice Diameter
3/8C2.161-1/80.6950.3850.348
1/2D2.711-5/160.8600.3850.464
3/4F2.951-5/81.0700.5050.593
1H3.642-1/41.3350.5050.890
1-1/4I3.912-3/41.6800.5051.135
1-1/2J4.363-1/41.9200.5051.385
2K5.853-1/22.4110.6251.555
2-1/2L5.003-3/42.9190.6251.555
3M5.444-1/23.5450.6252.025
4N6.805-1/24.5500.7552.560


NOTES (DIMENSIONS TABLE)*May be larger.
**Sockets per ASME/ANSI B16.11.Consult factory for more information.

Available Materials

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

Pressure Temperature Rating

Body MaterialsAvailabilityNon-Shock Pressure-Temperature Rating 
316/316L Stainless Steel (SS)

Carbon Steel (CS)
Standard3/8" - 2-1/2"
5000 PSIG @ 100°F
(1500 PSIG for o-ring seats)
3"
3000 PSIG @ 100°F
(1500 PSIG for o-ring seats)
4"
1500 PSIG @ 100°F
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
3/81.9
1/24.3
3/47.2
111.0
1-1/419.0
1-1/231.9
242.0
2-1/250.0
289.0
4140

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
3/8USC5.1 oz.
1/2USD11.5 oz.
3/4USF1.2 lb.
1USH3.1 lb
1-1/4USI4.9 lb.
1-1/2USJ7.4 lb.
2USK9.8 lb.
2-1/2USL8.8 lb.
3USM13 lb.
4USN22.3 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.
US3/8" - 1-1/4"3/8" - 1-1/4"AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
US3/8" - 1-1/4"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
US1-1/2" - 2"316L SSAFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
US1-1/2" - 2"C. SteelAFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
US3/8" - 2"Alloy 20
Alloy C-276
AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy C-276
US3/8" - 2"Alloy 400 or MONEL®AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy 400 or MONEL®
US3/8" - 2"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?

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