Back Pressure Maintaining Valves

BiS Wells offer a comprehensive range of Back Pressure Maintaining Valves (BPMV’s). These valves maintain a set pressure within a pneumatic or hydraulic system. When the set pressure is met the BPMV will open and exhaust system medium. The BPMV will then re-seat.

We offer three main types of BPMV; spring loaded, internally dome loaded and externally dome loaded. Depending on pressure, flow and physical size will determine which type of regulator is most suited to your application.

Our BPMV’s can handle inlet pressures up to 8,000 Psi and control system pressures from as little as 0.75 Psi through to 8,000 Psi. Valves are offered in Aluminium Alloy as standard but can be manufactured from Stainless Steel, Brass and Aluminium Bronze. Valves range from ¼” ports up to our largest BPMV at 3”.

Most of our BPMV’s are suitable for both pneumatic and hydraulic applications, please see our overview datasheets for suitability. As standard valves are offered with Nitrile or Viton seals however please contact us for medium compatibility as other elastomeric materials can be offered.

All our BPMV’s can be manufactured specially for Oxygen use, please contact us for more information.

Product Datasheets

Back Pressure Maintaining Valves Overview Datasheet

Data Sheets and Installation Drawings

H10 Sprung Loaded BPMV. 1/4″ & 3/8″ Ports. Up to 8,000 Psi

H11 Sprung Loaded BPMV. 1/4″ & 3/8″ Ports. Up to 4,500 Psi

H12 Sprung Loaded BPMV. 1/4″ & 3/8″ Ports. Up to 1,000 Psi

H15 Sprung Loaded BPMV. 1/4″, 3/8″ & 1/2″ Ports. Up to 7,250 Psi

H18 Sprung Loaded BPMV. 1/4″ & 3/8″ Ports. Up to 11,000 Psi

H100 and H101 Dome Loaded BPMV. 1/2″ Ports. Up to 1,000 Psi

H120 and H121 Dome Loaded BPMV. 1-1/2″ Ports. Up to 1,000 Psi

H130 and H131 Dome Loaded BPMV. 3″ Ports. Up to 1,000 Psi

H200 and H201 Dome Loaded BPMV. 3/8″ Ports. Up to 6,000 Psi

H210 and H211 Dome Loaded BPMV. 3/4″ Ports. Up to 6,000 Psi

Coming Soon – Full range of installation drawings

Installation Operation and Maintenance Manuals

General Instructions IOM – Sprung Loaded BPMV

General Instructions IOM – Dome Loaded BPMV

H15 & H15SS IOM

H100 & H101 IOM

H120 & H121 IOM

H200 & H201 IOM

H210 & H211 IOM


+44 1202 851462

BiS Wells Ltd
Units 17-23 Kingfisher Park, Collingwood Road,
West Moors, Wimborne, Dorset, BH21 6US

Opening hours:
Monday to Thursday: 08:00 – 16:30
Friday: 08:00 – 13:00
Saturday and Sunday: Closed