BPIV™ Buckling Pin Relief Technology

Performance Features

  • Sizes from 2" to 78" (50mm to 1,950mm)
  • Externally reset in minutes, without the need to open the pipeline
  • Continuous processing (fast inline external reset)
  • Hazardous service (limits operator exposure)
  • Large line size (available up to 78”)
  • High flow capacity
  • Low Pressure Drop – low Krgl – 1.22
  • High operating pressure to set pressure ratio, 95% on minimum.
  • Cryogenic designs available
  • ASME “UD” stamped, section XIII
  • European Pressure Equipment Directive “CE” marked

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  • Set Pressures
  • Tolerance
  • Materials & Accessories
  • Documentation

Set Pressures

BPIV™ Capabilities

Inlet Size Flow Area Set Pressure Range
2 NPS 2.75 sq in 15 - 2250 psi
3 NPS 6 sq in 15 - 2250 psi
4 NPS 10 sq in 15 - 2250 psi
6 NPS 23.5 sq in 1 - 2250 psi
8 NPS 39.65 sq in 1 - 2250 psi
10 NPS 62.48 sq in 1 - 2250 psi
12 NPS 90.5 sq in 1 - 2250 psi
14 NPS 109 sq in 1 - 2250 psi
16 NPS 149 sq in 1 - 1440 psi
18 NPS 196.2 sq in 1 - 1440 psi
20 NPS 239.1 sq in 1 - 1440 psi
24 NPS 367.6 sq in 1 - 720 psi
30 NPS 601 sq in 1 - 720 psi
32 NPS 614 sq in 1 - 720 psi
34 NPS 695 sq in 1 - 720 psi
36 NPS 781 sq in 1 - 720 psi
38 NPS 872 sq in 1 - 720 psi
40 NPS 968 sq in 1 - 720 psi
42 NPS 1069 sq in 1 - 720 psi
44 NPS 1175 sq in 1 - 720 psi
46 NPS 1286 sq in 1 - 720 psi
48 NPS 1403 sq in 1 - 720 psi
52 NPS 1650 sq in 1 - 720 psi
54 NPS 1784 sq in 1 - 720 psi
56 NPS 1918 sq in 1 - 720 psi
60 NPS 2206 sq in 1 - 720 psi

The BS&B BPIV set pressure is controlled by a precision buckling pin which is calibrated to respond to the forces generated by inlet pressure acting on the valve disk independent of any back pressure that may be present. When the pin activates, the valve disc rotates to achieve the flow area.

BPIV Buckling Pin Mechanism
(Closed Position)

Burst Tolerance

Marked Burst Pressure Burst Tolerance
≤ 40 psig (2.76 barg) ± 2 psig (0.138 barg)
> 40 psig (2.76 barg) ± 5%

Dimensions

Sales drawings are avaliable upon request.

Materials of Construction

Minimum Standard Materials
  Carbon Steel Stainless Steel Low Temp Carbon Steel
Body
Disc and Shaft (Internals)    
Alternative Materials availabile upon request, e.g Inconel 625, Duplex, Supler Duplex

Flange Torque*

Click here to see complete table.

Accessories

BS&B supplies many of the accessories required to safely and conveniently install our overpressure relief devices and complementary products. Through our professional team and global network of sales engineers and procurement personnel, we are able to provide the highest quality accessory products to meet your installation requirements.

Saf-T-Pin™ Buckling Pin Cartridge

The BPAV can be provided with buckling pin cartridges that are installed like an electrical fuse. The Saf-T-Pin buckling pin cartridge allows a “quick-change” option of buckling pins with a simple push-in/pull-out design for installation within the enclosure. Each Saf-T-Pin cartridge contains a calibrated buckling pin that is perfectly mounted for optimum performance.

Replacement Buckling Pins

Stainless steel pins with tags containing pressure and traceability information including the serial number of the BPAV device.

Product Literature

Buckling Pin Pressure Relief Technology

The BPIV is the same as the BPRV, but is back pressure independent.