Refrigeration Constant Pressure Valves

Refrigeration Constant Pressure Valves

Constant pressure valves are automatic regulating devices integral to the oil management systems of screw compressor packages. They ensure that a sufficient minimum differential pressure (for instance, 3 bar, 4 bar, etc.) or oil injection pressure is maintained during both the start-up phase and the operation of the screw compressor.

Product Specification:

  • Sizes: 1.1/2" to 6"
  • Connections: Flanged & Butt Weld
  • Materials: Steel
  • Medium: Glycol-based cold brine refrigerant as per EN 378 p. 1, including NH3, R134a, R290 (propane), R507, mixtures with refrigerant oil, as well as neutral gas and liquid media
  • Set Pressure: 1 - 25 Barg
  • Temperature Range: -20 to +120 °C
  • Max Design: (details to be specified)
  • Notes: (additional information to be provided)

Optimise your screw compressor performance with our reliable constant pressure valves, designed for durability and efficiency in various applications.

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Other Products and Services from Flowstar (UK) Ltd

Bailey 616D Safety Relief Valve

Bailey 616D Safety Relief Valve

The Kunkle Bailey 616D safety relief valve is a spring-operated, high-capacity safety valve specifically designed for low-pressure air applications.

Commonly utilised on blowers or bulk transfer vehicles for road and rail transport, the Kunkle Bailey 616D safety relief valve offers essential overpressure protection for positive displacement air blowers, as well as associated tanks and pressure vessels.

Features:

  • Engineered to provide precise relieving and re-seating pressures.
  • Protected open discharge facilitates downward flow.
  • Non-stick seating surfaces ensure a positive shut-off and prevent sticking.
  • A combination of aluminium and gunmetal offers a lightweight yet extremely robust construction.

Specifications:

  • Material: Body - Aluminium / Trim - PTFE & Bronze
  • Sizes: 1.1/2" to 2" (DN40 to DN50)
  • Connections: BSP Female inlet x Open discharge outlet
  • Medium: Air
  • Pressure Range: 0.2 to 2.5 barg (2.9 to 36.3 psig)
  • Temperature Range: -30°C to 200°C

The Kunkle Bailey 616D safety relief valve is the ideal solution for maintaining safety and efficiency in your low-pressure air systems, ensuring reliable performance in various applications.

Bailey 707ML Safety Relief Valve Female x Female (Metal Disc with Lever – Suitable for Steam & Liquid Service)

Bailey 707ML Safety Relief Valve Female x Female (Metal Disc with Lever – Suitable for Steam & Liquid Service)

The Kunkle Bailey 707ML Safety Relief Valve (Female x Female) features a superior top-guided design, which integrates an unobstructed seat bore with exceptional high lift capability. This valve is certified to BS EN 4126 Part 1 (BS6759 pt 1:2:3) and is adept for use with air and gas, steam and hot water (above 212°F / 100°C), as well as process liquids, depending on the model selected. We will precisely set and test the valve to meet your specifications, providing a pressure test certificate to verify this before dispatch.

Specifications

  • 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 referred to as IMI Bailey Birkett valves, Kunkle Emerson valves, and Safety Systems UK valves.

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Quick Closing Valve

Quick Closing Valve

A marine quick-closing valve (QCV) is a crucial safety shut-off valve utilised on vessels to immediately halt the flow of flammable or hazardous fluids, such as fuel oil, diesel, or lubricating oil, during a fire or emergency situation. These valves can be operated remotely and are mandated by SOLAS (International Convention for the Safety of Life at Sea) and classification societies within machinery spaces and fuel systems.

Purpose of a Quick-Closing Valve

  • To swiftly isolate fuel and oil tanks during emergencies, for instance, in the event of an engine room fire.
  • To prevent fuel from exacerbating a fire.
  • To safeguard personnel and diminish potential damage.
  • To ensure compliance with maritime safety regulations, including those from the IMO, SOLAS, and classification societies.

We offer a wide selection of Quick Closing Valves from several leading manufacturers. For your specific requirements, please do not hesitate to contact us.

Flowstar UK Ltd

Flowstar (UK) Ltd

Wiltshire Road, Kingston-upon-Hull, East Riding of Yorkshire, HU4 6PA, United Kingdom

Flowstar (UK) Ltd is a leading global supplier of safety, relief, and reducing valves. With strong partnerships across major manufacturers, we deliver precise, reliable valve solutions tailored to your needs. Email enquiries to sales@flowstar.co.uk or call us on +44 (0)1482 601030.