JFD's Divex back pressure regulator (BPR) protects the occupants of pressurised chambers breathing on built-in breathing systems (BIBS).
The Divex back pressure regulator has be designed to improve performance, comply with and exceed national and international breathing performance guidelines, thus providing a safer alternative to standard industrial type back pressure regulators commonly used in the past.
Fitted to the overboard discharge (exhaust) lines of a chamber BIBS system, the BPR limits the maximum suction to which a divers lungs may be subjected in the event of a BIBS mask mechanical failure.
Specification
Item | Order Code |
Divex back pressure regulator | RP700 |
Outward relieving check valve | RP700202 |
Inward relieving relief valve | RP700203 |
Pressure adjustment | 0-4 bar |
Inlet and outlet connections | 1" NPT female |
Size | Max. height: 200mm Max. height: 130mm |
Weight | 2.2kg |
Maximum operation pressure | 450 msw (45 bar G) |
Document | Document Type |
Divex back pressure regulator | Datasheet |
Divex back pressure regulator, 45 bar (Part number: RP700) | Operation and maintenance |
Back pressure regulator assembly, 1" NPT F, brass | Drawing |

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