Technical Data
Gate Valves Product Range

Last Updated

August 4, 2022

Flowflex reserve the right to alter the product ranges and specifications associated with its products without prior notice

Flowflex Gate valves are installed in systems to isolate flow, and should not be used as control or regulating valves. By turning the stem, the gate inside the valve moves up and down to either interrupt or facilitate the flow of the system.

Gate valves are typically chosen where minimum pressure loss is required, as when fully open, there is very little to interrupt flow. Furthermore, and advantage of using a Gate Valve is that its slow process of closing mitigates the effects of water hammer in your system.

Flowflex Brass Compression Gate Valves are available in sizes 15mm to 54mm. Flowflex Brass and Bronze Female Gate Valves are available in sizes from ½” to 2”. All Flowflex Gate Valves have Aluminium Handwheels.

  • Non Rising Stem
  • Manufactured to BS 5154
  • Compression Ends to BS EN 1254-2
  • 5 Year Warranty


  • Domestic
  • Commercial
  • Industrial


Flowflex operates a quality management system audited by the British Standards Institute for the manufacture and supply of fittings and components for use in all applications of the HVAC industry.

Tube Compatibility

All installers should ensure that the size of the valve matches the size of the tube, whilst also ensuring both are in good condition and free from damage and imperfections.

Flowflex valves are designed to connect BS EN 1057 tube.

Working Conditions

Working Conditions of Gate Valves vary based on their pressure rating and connection mechanism. Flowflex supplies Gate Valves that match the following pressure ratings:

Compression Gate Valves

Product Range P474 L197 P474LS
Pressure Rating PN16 PN16 PN16
Working Temperatures -20°C to 120°C 0°C to 99°C -20°C to 120°C

Female Gate Valves

Product Range L198 L196 L198LS
Pressure Rating PN20 PN20 PN20
Working Temperatures -10°C to 100°C -10°C to 100°C -10°C to 100°C
Pressure Rating PN9 PN9 PN9
Working Temperatures 100°C to 180°C 100°C to 120°C 100°C to 180°C
All working conditions assume that the components have been assembled and connected correctly, and adhere to their respective tube compatiblity
When planning to use our products in applications outside the scope of our recommendations, approval from us should be obtained beforehand. Please contact us in these cases.
Compression Gate Valves
15mm to 54mm
Intermediate pressure ratings shall be obtained by interpolation
Intermediate pressure ratings shall be obtained by interpolation