DescriptionCheck valves permit flow in one direction only and close automatically if flow reverses. They are entirely automatic in action depending upon pressure and velocity of flow within the line to perform their functions of opening and closing.
Specification NotesValves are manufactured in accordance with BS 5153: 1974 and also meet the requirements of MSS.SP-71. End flanges conform to BS 1560. Section 3.2/ANSI B16.1 Class 125 with flat face and are normally supplied drilled. This valve is not suitable for use on group 1 gasses or unstable fluids as defined by the Pressure Equipment Directive 97/23/EC.