|Part #||Port Size||Pilot Port||Max. Operating |
|Flow Coefficient |
|HV16||2″||1/4″ NPT||15 psig / 1 bar(g)||50|
|HV32||4″||1/4″ NPT||15 psig / 1 bar(g)||150|
|HV48||6″||1/4″ NPT||15 psig / 1 bar(g)||320|
HV Low Pressure Control Valve Advantages:
- Automatically responds to changes in system flow rate
- Controls pressures near atmosphere accurately
- Able to handle corrosive media and aggressive vapors
- Able to control at high temperatures 150ºC/300ºF
- Easily and inexpensively field maintained
- Weld Tube Stub
- Pipe Flange – ANSI 150# Class Typical
- SS304 standard
- SS316L optionally
- Viton (FKM)
- EPDM (std)
Originally designed for ventilation applications, the HV Series can provide precision into the millibar range (down to around 1 inH2O / 25.4 mmH2 or 0.03 psig / 2 mbar(g)). The HV valve is able to control accurately at these low pressures because of its unique direct diaphragm sealing design. A thin flexible membrane is the only moving part. This diaphragm is used to directly seal against a field of orifices. There are no internal springs or sliding seals to create internal friction. The diaphragm has a large area which allows it to be sensitive to small changes in system pressure or flow rate. The unique sensitivity of Equilibar’s supple diaphragms give significant advantages over slow-reacting butterfly valves and other control mechanisms. The HV operates quickly and is able to automatically adjust to changes in as little as 10mS.
Like other Equilibar back pressure regulators, the dome-loaded design matches the inlet pressure to the pilot or set-point pressure applied to the 1/4″ dome port. The unit can be used in either back pressure control, direct vacuum regulating, or in both modes. The unit will match the set point pressure provided to the reference port, be it a positive pressure or negative pressure. The HV series can control vacuum through positive pressures in gauge referenced or absolute referenced models.
The HV back pressure valve utilizes welded stainless steel plate metal construction to avoid the higher weight and costs of bar stock or cast body construction. Contact an Equilibar application engineer to configure the best solution for your high flow application.