BS&B

BPCV™ Buckling Pin Relief Valve

Buckling pin relief valve available in sizes from 1" x 1" to 14" x 14" (25mm x 25mm to 350mm x 350mm), with set pressures from 15 to 3,500 psi for gas and liquid media. The datasheet calls out pump bypass as a purpose-built application, and it can be externally reset in minutes without opening the pipeline.

Size range: 1" x 1" to 14" x 14" (25mm x 25mm to 350mm x 350mm)
Set pressure range: 15–3,500 psi (varies by size/orifice)
Media: Gas / liquid
Discharge coefficient (Kd): 0.706 (gas), 0.617 (liquid)
Operating-to-set pressure ratio: 95% minimum
Reset method: External reset in minutes, no need to open pipeline
Certifications: ASME "UD" stamped (Section XIII); CE marked (PED)
Back pressure: Independent; suitable for variable or constant back pressures
Service: Ideal for pump bypass applications; hazardous service (limits operator exposure); continuous processing

BPCV™ capabilities

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Inlet size	Outlet size	Flow area	Orifice (designator) diameter	Set pressure range	Media
1 NPS	1 NPS	0.72 sq in	0.957 in	2100 – 3500 psi	Gas / liquid
1 NPS	1 NPS	0.86 sq in	1.046 in	50 – 2100 psi	Gas / liquid
1.5 NPS	1.5 NPS	2.04 sq in	1.612 in	15 – 1440 psi	Gas / liquid
2 NPS	2 NPS	3.36 sq in	2.067 in	15 – 720 psi	Gas / liquid
3 NPS	3 NPS	7.39 sq in	3.067 in	15 – 720 psi	Gas / liquid
4 NPS	4 NPS	12.73 sq in	4.026 in	15 – 720 psi	Gas / liquid
6 NPS	6 NPS	28.89 sq in	6.065 in	15 – 275 psi	Gas / liquid
8 NPS	8 NPS	50.03 sq in	7.981 in	15 – 275 psi	Gas / liquid
10 NPS	10 NPS	78.58 sq in	10.020 in	15 – 275 psi	Gas / liquid
12 NPS	12 NPS	113.10 sq in	11.938 in	15 – 275 psi	Gas / liquid
14 NPS	14 NPS	137.89 sq in	13.124 in	15 – 275 psi	Gas / liquid