Bushing Check Valve Style – BU, BR

Description

The Bushing Check Valve (BU, BR) is a spring loaded check valve with a standard pipe bushing housing. The valve is adaptable to many types of service applications. It has very little restriction and produces a low-pressure drop. It can be used quite effectively in systems where flow and pressure drop are critical by the use of a reducer coupling. This spring check valve also makes an excellent vacuum breaker. The high flow rate insures maximum effectiveness for vacuum breaker service. By reversing the direction of flow it can also be used as a low-pressure relief valve.

The Bushing Check Valve thread sizes are designated by two sets of numbers; the first being the male thread, that second the femals thread. NPT threads are per ASME B1.201. Also available with ISO 7 “R” (R male x Rp female) threads (BR)

 

Size & Dimension

Normal Pipe SizeSize CodeAHex Size B*CDEFOrifice Diameter
1/2 x 3/8D1.307/81/41/2 NPT3/8 NPT0.530.348
3/4 x 1/2F1.301-1/81/43/4 NPT1/2 NPT0.610.464
1 x 3/4H1.831-3.81/21 NPT3/4 NPT0.780.593
1 - 1/4 x 1I1.831-3/41/21-1/4 NPT1 NPT0.850.890
1 - 1/2 x 1-1/4J2.1725/81-1/2 NPT1-1/4 NPT1.011.135
2 x 1-1/2K2.172-1/25/82 NPT1-1/2 NPT1.191.385
2-1/2 x 2L2.5335/82-1/2 NPT2 -1/2 NPT1.431.555
3 x 2-1/2M3.093-1/213-NPT1.592.025
bushing check valve

NOTES (DIMENSIONS TABLE)
The bushing thread sizes are designated by two sets of numbers; the first being the male thread, the second the female thread.
Threads are per ASME B1.20.1.
*May be larger and/or round.

 

**Maximum nominal dimension for a fully open valve with no spring. Consult factory for more information.

 

Available Materials

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

Pressure Temperature Table

Body MaterialAvailabilityNon-Shock Pressure-Temperature Rating
316 Stainless Steel (SS)
Carbon Steel (CS)
Brass (BR)
Standard3000 PSIG @ 100°F

(1500 PSIG for o-ring seats)
Alloy 20 (A2)
Alloy C-276 (HC)
Alloy 400 or MONEL®(MO)
Semi-standard
Alloy B (HB)
Titanium (TI)
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
1/2 x 3/82.6
3/4 x 1/24.6
1 x 3/46.6
1-1/4 x 1 12.6
1-1/2 x 1-1/418.8
2 x 1-1/232.0
2-1/2 x 242.5
3 x 2-1/289.0

FOR WATER AT 72 F

WATER FLOW RATE - GPM
Note: All flow curves and Cv values presume the valve are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.

Valve Weights

SIZEPART NUMBERALL MATERIALS
1/2 x 3/8BUD1.7 oz.
3/4 x 1/2BUF2.9 oz.
1 x 3/4BUH6.4 oz.
1 -1/4 x 1BUI10.8 oz.
1-1/2 X 1-1/4BUJ13.8
2 x 1-1/2BUK1.6 lb.
2-1/2 x 2BUL2.3 lb.
3 x 2-1/2BUM5.4 lb.

*BU size is designated by the male thread.

Seat & Cracking Pressure Options

Valve Style Size RangeBody Materials
Other Options
Allowable Seat Materials
Other Options
Standard Cracking Pressures
Other Options
More Info.
Standard Spring Material
More Info
BU

1-1/2"

316 SS BrassAFLAS®. Buna-N
EPDM. Kalrez®
"Metal to Metal"
Neoprene Viton®
PTFE
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
BU1/2"- 1-1/2"C. SteelAFLAS®. Neoprene
Buna-N PTFE
Kalrez® Viton®
"Metal to Metal" Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
BU"2-3"316 SS BrassAFLASS® Buna-N EPDM Kalrez®
"Metal to Metal" Neoprene PTFE Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
BU2"-3"C. SteelAFLAS® Buna-N Kalrez® "Metal to Metal"
Neoprene PTFE Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
BU1/2"-3"Alloy 20
Alloy C-276
AFLAS® Buna-N
EPDM Kalrez®
"Metal to Metal" Neoprene PTFE Viton®
1/2 PSIAlloy C-276
BU1/2"-3"Alloy 400 or MONEL®Alloy 400 or MONEL®
"Metal to Metal" Neoprene PTFE Viton®
1/2 PSIAlloy 400 or MONEL®
BU1/2"-3"Alloy BAFLAS® Buna-N
EPDM Kalrez®
"Metal to Metal" Neoprene PTFE Viton®
1/2 PSIAlloy B

Note:  The bushing thread sizes are designated by two sets of numbers; the first being the male thread, the second the female thread.

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?
What is an Inline Check Valves?

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