Reliance RWC 104 Series Pressure Relief Valve 3/4" x 1" F x F 6 Bar - PREL104010

The Kunkle Bailey 707MD Safety Relief Valve Female x Female features a top-guided design, optimising flow with an unobstructed seat bore and a high lift capability. This valve is certified to BS EN 4126 Part 1 (BS6759 pt 1:2:3) and is designed for use with air, gas, steam, hot water (above 212°F / 100°C), and process liquids, depending on the selected model. We will set and test the valve according to your specifications, and upon request, a pressure test certificate will be provided prior to dispatch, ensuring peace of mind.

Specification

Sizes: 1/2" to 2"
Connections: BSP Female Inlet x BSP Female Outlet
Materials: Bronze body, Chrome Alloy spring
Disc: Stainless Steel
Medium: Air, Vapours, Gases, Liquids, and Steam
Set Pressure: 0.35 to 24 Barg
Temperature: -20 to +224°C
Notes: Also recognised as IMI Bailey Birkett valves, Kunkle Emerson valves, and Safety Systems UK valves.

Optimised for reliability and performance, the Kunkle Bailey 707MD Safety Relief Valve is an essential component for various applications, ensuring safety and compliance in your systems. Ideal for industrial environments, it delivers top-tier performance while adhering to the highest safety standards.

Features & Benefits

• The innovative anti-stagnation design ensures a clean flow path, significantly reducing fluid entrapment and inhibiting the growth of bacteria. • Perfect for domestic hot water systems, this solution is essential for safeguarding against Legionella. • Enjoy self-balancing, thermostatically controlled flow regulation and disinfection, providing peace of mind for your water systems. • Thermal disinfection is achievable at temperatures exceeding 70°C for enhanced hygiene. • The compact unit includes an isolation valve with a thermometer access point for easy monitoring. • Equipped with a settable temperature sensing cartridge, factory pre-set to a standard of 57°C for optimal performance. • Features an accuracy of +/- 2°C at the set temperature, ensuring reliable operation. • This product is WRAS Approved, demonstrating compliance with the highest standards of water safety.

Specification

• Taper threaded in accordance with BS EN 10226-2

Pressure/Temperature Rating

• PN16 • Maximum Temperature of 90°C

The FSSCRA rupture disc is an ASME-approved compression or reverse-acting disc featuring precision micro-scored petals with four, six, or more radial scores. This design ensures rapid, full opening while reducing the risk of petal separation, making the disc suitable for both low and high burst pressure applications.

Designed for use with gases and liquids (with a gas cushion), the FSSCRA performs reliably in cycling and pulsating conditions without compromising safety margins. The disc responds to overpressure within milliseconds and opens cleanly without fragmentation, making it particularly well suited for protecting safety relief valves.

With an operating-to-burst pressure ratio of up to 95%, the FSSCRA delivers excellent efficiency and stability. It offers strong corrosion resistance, which can be further enhanced with an optional PTFE lining, and in many applications can operate under full vacuum without the need for additional supports. The design complies with ASME Section VIII, Division 1 requirements.

Key Specifications:

• Sizes: 1" (DN25) to 36" (DN900)

• Materials: Stainless steel, Alloy 201, 400, 600, 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