NABIC 542L Relief Valve

Introducing the Floguard range of Category 3 double check valves, designed to safeguard against the dangers of backflow and back-siphonage contamination associated with Category 3/Class 3 risks. Each valve features a convenient test point, allowing for easy monitoring of the downstream check valve's functionality. For more in-depth information, be sure to explore our enlightening article on Backflow Prevention in the Technical section of our website.

Specifications

Sizes: Available in 15mm, 22mm, and 28mm compression fittings, or 1/2", 3/4", 1", 1.1/4", 1.1/2", and 2" Female BSP.

Connections: Compression or Female BSP.

Materials: DZR Brass body, EPDM seals, Acetyl Copolymer check cartridges, and Stainless steel springs.

Medium: Drinking water.

Working Pressure: Ranges from 0.1 to 16 Barg.

Maximum Temperature: Up to 85°C.

Notes: WRAS approved.

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### Features & Benefits - **One-Way Flow Control**: Our check valves allow flow in a single direction and automatically close if the flow reverses, ensuring reliable operation based on pressure and flow velocity. - **Non-Slam Design**: The innovative rubber seat combined with a spring-assisted closure mechanism minimises slamming, enhancing the longevity of the valve. - **Quiet Operation**: The EPDM rubber seat ensures quiet functionality while improving the seating of the disk, resulting in smoother operation. - **Eyebolt Compatibility**: For sizes DN200 and above, the valves feature tapped holes for eyebolts in compliance with BS EN ISO 3226: 2010 (eyebolts are not included). - **Versatile Applications**: This valve is specifically designed for pump duty applications, making it an ideal choice for various systems. ### Specification - **Dimensions**: The face-to-face dimensions meet the standards outlined in BS EN 558 series 16. - **Installation Flexibility**: Suitable for installation in both vertical and horizontal pipelines. Note that when installed in vertical pipelines, the flow must always be directed upwards. - **Regulatory Compliance**: This valve is meant for use with group 2 liquids only, as defined by the Pressure Equipment Directive 2014/68/EU. ### Pressure/Temperature Rating - **Figure 861**: Rated for PN16 - **Temperature Range**: Operational from -10°C to 120°C Optimise your fluid control systems with our reliable check valves, designed for safety, efficiency, and compliance.

Product Specification

Sizes Available: 3/8”, 1/2”, 3/4”, 1”, 1.1/4”, 1.1/2”, 2”
Connections: Screwed BSPP or NPT
Materials: Inlet Nozzle - Stainless Steel / Body & Bonnet - Stainless Steel (1.2)
Disk Options: Metal, Viton, Nylon, PEEK, or Vespel
Joints & Seals: NBR, FPM, EPDM (varies by model)
Head Type: C (Gas Tight Cap)
Suitable Medium: Steam, Gases, and Liquids
Set Pressure Range: 0.05 to 500 Barg (dependent upon size - multiple springs available)
Temperature Range: -60 to 280 degrees Celsius
Notes: The specified temperature range applies to valves featuring a metal disk.

Explore our premium range of stainless steel valves, engineered for durability and reliability. Designed to cater to various applications involving steam, gases, and liquids, our valves ensure optimal performance with a set pressure range from 0.05 to 500 Barg. With extensive material options and connection types, our valves are perfect for any operational needs. Don’t compromise on quality—choose our valves for robust engineering and exceptional adaptability.