Technical description
CHOV valves are controlled change-over valves. They are designed to stop or allow the flow of the medium by external operation, either manually or via the installed drive, and they allow the continuous operation of the piping when performing maintenance of the safety valve. These valves are designed and manufactured to ensure maximum service life and reliability. They are suitable for liquids, gases and steam.
MATERIAL SPECIFICATION
Wafer disc check valves are made from carbon and stainless steel. The material type can be adjusted according to the customer´s request to optimally suit the operating conditions.
BASIC STANDARDS FOR DESIGN
Building lengths
EN 12 516-1, EN 12 516-2
Building lengths
dimension is specified by the manufacturer
Flange dimension
EN 1092-1, ASME/ANSI B16.5
Testing
EN 12 266-1
Pressure-temperature rating
EN 12 516-1, ASME/ANSI B16.34
Dimension of welding-on ends
EN 12 627
Range DN (NPS): 15 – 1000 (1/2″ – 40″)
Range PN (CLASS): 10 – 400 (150 – 2500)
Operating temperature range: -196°C ÷ +550°C
Connection into piping:
Flangen, Welding-on
Control:
Hand Wheel, Hand Wheel with Gearbox,
Electric or Pneumatic actuator,
Without control,
Top flange dimensions – EN 5210
