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 Size Size Code A B* C** D** Orifice Diameter
3/8 C 2.16 1-1/8 0.695 0.385 0.348
1/2 D 2.71 1-5/16 0.860 0.385 0.464
3/4 F 2.95 1-5/8 1.070 0.505 0.593
1 H 3.64 2-1/4 1.335 0.505 0.890
1-1/4 I 3.91 2-3/4 1.680 0.505 1.135
1-1/2 J 4.36 3-1/4 1.920 0.505 1.385
2 K 5.85 3-1/2 2.411 0.625 1.555
2-1/2 L 5.00 3-3/4 2.919 0.625 1.555
3 M 5.44 4-1/2 3.545 0.625 2.025
4 N 6.80 5-1/2 4.550 0.755 2.560



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 Materials Availability Non-Shock Pressure -Temperature Rating  
316/316L Stainless Steel (SS)

Carbon Steel (CS)

Standard 3/8" - 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

Size Cv
3/8 1.9
1/2 4.3
3/4 7.2
1 11.0
1-1/4 19.0
1-1/2 31.9
2 42.0
2-1/2 50.0
2 89.0
4 140

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

SIZE PART NUMBER SS, CS & Alloys
3/8 USC 5.1 oz.
1/2 USD 11.5 oz.
3/4 USF 1.2 lb.
1 USH 3.1 lb
1-1/4 USI 4.9 lb.
1-1/2 USJ 7.4 lb.
2 USK 9.8 lb.
2-1/2 USL 8.8 lb.
3 USM 13 lb.
4 USN 22.3 lb.


Valve weights are approximate.

Seat & Cracking Pressure Options
Valve Style Size Range Body Materials
Other Options
Allowable Seat Materials
Other Options
Standard Cracking Pressures
Other Options
More Info.
Standard Spring Material
More Info.
US 3/8" - 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
US 3/8" - 1-1/4" C. Steel AFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
US 1-1/2" - 2" 316L SS AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
US 1-1/2" - 2" C. Steel AFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
US 3/8" - 2" Alloy 20
Alloy C-276
AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSI Alloy C-276
US 3/8" - 2" Alloy 400 or MONEL® AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSI Alloy 400 or MONEL®
US 3/8" - 2" Alloy B AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSI Alloy B