Reliance RWC 104 Series Pressure Relief Valve 1" x 1.1/4" F x F 6 Bar - PREL104002

The Fig. 970W and 970WG valves feature a robust ductile iron body with integrated notch plate, anti-blowout stem, and fully bonded epoxy coating for Level 3 C3 corrosion protection. WRAS approved for potable water (-10 to 80°C), they are maintenance-free, suitable for flow regulation and gas applications, and DN250+ valves include a gear operator. Compliant with BS EN 593/558 and approved for Group 1 & 2 gases and liquids (PED 2014/68/EU). Rated PN16, -10 to 80°C (WRAS) or -10 to 100°C (Non-WRAS).

The FSKRDN NanoScored rupture disc incorporates advanced technology to deliver highly reliable overpressure protection. The convex disc maintains its original shape during normal operation and only reverses at the set burst pressure. It supports operating-to-burst pressure ratios of up to 95% and withstands thousands of pressure cycles without loss of performance. When activated, the disc opens fully in milliseconds along the scored line, producing no fragments. Compared with conventional designs, it is less sensitive to temperature fluctuations, making it ideal for applications with wide temperature variations.

Thanks to its innovative construction, the FSKRDN can operate with liquids only, including in cycling and pulsating conditions, without compromising safety margins. It is particularly well suited for isolating safety relief valves. A wide selection of materials and optimized thickness provide excellent corrosion resistance, which can be further enhanced with an optional PTFE lining on the process side. The disc does not require vacuum support and is capable of withstanding high back pressures.

Key Specifications:

• Sizes: 1" (DN25) to 36" (DN900)

• Materials: Stainless steel, Alloy 201, 400, 600, 625, C276, Titanium

• Burst Pressure Range: 0.41–137 bar g (6–2000 psi g), depending on size and material

• Krl: 0.48

• Tolerance: ±5% to ±20%

• Temperature Range: –196°C to 480°C

• Operating Margin: 90% (up to 95% depending on service conditions)

• Fragmentation: None

• Use Under Valve: Yes

• Corrosion Resistance: Very good

• Linings: Optional

• Holder Options: FSHR/A, FSHR/P, FSHR/F, FSHTC

• Rupture Detection: Electrical, Magnetic, Inductive, Optical

• Certifications: ASME (UD Stamp), PED (CE), ATEX EX II 2 GD

The Kunkle Bailey 707EL Safety Relief Valve, featuring a Female x Female connection, boasts a superior top guided design that integrates an unobstructed seat bore alongside high lift capability. This valve conforms to the BS EN 4126 Part 1 (BS6759 pt 1:2:3) standard and is designed for use with air/gas, steam/hot water (above 212°F / 100°C), and various process liquids, depending on the specific model selected. We will customise and test the valve according to your requirements, providing a pressure test certificate to confirm the specifications before dispatch.

Specification

Sizes: 1/2" to 2" Connections: BSP Female Inlet x BSP Female Outlet Materials: Bronze body, Chrome Alloy spring Disc: EPDM Medium: Air, Gases, Liquids Set Pressure: 0.35 to 24 Barg Temperature: -20 to +95 °C Notes: WRAS approved when equipped with an EPDM disc. This valve is also commonly referred to as IMI Bailey Birkett valves, Kunkle Emerson valves, and Safety Systems UK valves.