We offer a comprehensive range of safety relief and relief valves for use on a wide range of media, from low pressure valves that vent to atmosphere, to high pressure (1379 bar, 20,000 psi) piped return valves. Typically, low pressure valves offer a pop-open style characteristic, while higher pressure valves offer proportional or metering style operation. BiS relief valves are CE marked to denote approval as Category IV safety accessories under the 2014/68/EU Pressure Equipment Directive. Many options are available, including cartridge and manifold mounted versions, and many valves are available in exotic materials via the factory, including monel, inconel, hastelloy and titanium.
1/4" Stainless Steel Vent to Atmosphere Style Safety Relief Valve for Set Pressures from 0.7 to 40 bar, with Liquid or Gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/8" Stainless Steel Vent to Atmosphere Style Safety Relief Valve for Set Pressures from 0.7 to 40 bar, with Liquid or Gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/2" Stainless Steel Vent to Atmosphere Style Safety Relief Valve for Set Pressures from 0.7 to 40 bar, with Liquid or Gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/4" Stainless Steel Vent to Atmosphere Style Safety Relief Valve for Set Pressures from 0.7 to 40 bar, with Liquid or Gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1" Stainless Steel Vent to Atmosphere Style Safety Relief Valve for Set Pressures from 0.7 to 18 bar, with Liquid or Gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Safety Relief Valve for set pressures from 0.7 to 40 bar, with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/8" Stainless Steel Safety Relief Valve for set pressures from 0.7 to 40 bar, with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/2" Stainless Steel Safety Relief Valve for set pressures from 0.7 to 40 bar, with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/4" Stainless Steel Safety Relief Valve for set pressures from 0.7 to 40 bar, with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1" Stainless Steel Safety Relief Valve for set pressures from 0.7 to 28 bar, with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Cartridge Style Safety Relief Valve for incorporation into manifolds, where low set pressures are required. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Vent to Atmosphere Style Relief Valve for set pressures from 400 to 2,000 psi, with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/8" Stainless Steel Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Relief Valve with Soft Seats for pressures up to 6,000 psi with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/8" Stainless Steel Relief Valve with Soft Seats for pressures up to 6,000 psi with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Cartridge Style Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/4" Stainless Steel Manifold Mounted Style Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/2" Stainless Steel Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/2" Stainless Steel Relief Valve with Soft Seats for pressures up to 6,000 psi with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1/2" Stainless Steel Manifold Mounted Style Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/4" Stainless Steel Relief Valve for pressures up to 15,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/4" Stainless Steel Relief Valve with Soft Seats for pressures up to 6,000 psi with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
3/4" Stainless Steel Cartridge Style Relief Valve for pressures up to 6,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1" Stainless Steel Relief Valve for pressures up to 3,000 psi. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.
1" Stainless Steel Relief Valve with Soft Seats for pressures up to 3,000 psi with liquid or gas. Approved as a Safety Accessory to Category IV of the Pressure Equipment Directive 2014/68/EU.