WVFX
Pressure operated water valves types WVFX and WVS are used for regulating the flow of water in refrigeration plants with water-cooled condensers. The pressure operated water valves give modulating regulation of the condensing pressure within defined limits during operation. When the refrigeration plant is stopped, the cooling water flow is shut off automatically. Pressure operated water valves can be used with flammable refrigerants. Double sealing between the refrigerant and the water line ensures that in case the bellows damage and the refrigerant leak, it cannot enter into the water. This severely limits the safety implications. It means that the valve can be used together with a double walled heat exchanger and water circuit in such a system does not need to be considered as a part of the installation for flammable refrigerants (EN378-1:2008, clause 4.4.2.2).
Features and benefits
- Media: Fresh water and Neutral brine
- Needs no power supply – self acting
- Opens on rising condensing pressure
- Complete flow range from 1.4 – 300 m3/h
- Low flow version of WVFX – 0,63 m3/h, (available on request)
- Insensitive to dirt
- WVFX 10 – 25 are available in stainless steel housing
- Suitable for flammable refrigerants
- May be used in the following EX range: Category 3 (Zone 2)