Solenoid Valves - Relief Valves - Check Valves | BiS Valves solenoid valves, bis valves, check valves, safety relief valves, pressure relief, Stop & Metering valves, 3 & 4 Ported Directional Control, Check & Shuttle valves, Pilot Operated Check, Relief, Excess Flow, Filters, Pressure Sensing, Manifold, design, man BiS Valves is an internationally recognised company with over 50 years experience in the design and manufacture of a wide range of small bore stainless steel pressure and flow control valves for high pressure liquid and gas. Products include check valve, safety relief valves, pressure relief valves, Solenoid valves, Stop & Metering valves, 3 & 4 Ported Directional Control valves, Check & Shuttle valves, Pilot Operated Check valves, Relief valves, Excess Flow valves, Filters, Pressure Sensing valves, Manifold solutions. Operating in a variety of sectors, we are a leading supplier to the offshore oil and gas Industry for topside, subsea and downhole applications where quality, reliability and safety are critical. With an extensive range of standard products and a bespoke design service we aim to provide the right solutions for your applications.