Hydraulic Pressure Control Valves - 50-90 & 650-90 Pressure Sustaining Valve | Cla-Val | Philippopoulos s.a.
Hydraulic Pressure Control Valves - 50-90 & 650-90 Pressure Sustaining Valve | Cla-Val | Philippopoulos s.a.

Hydraulic Pressure Control Valves - 50-90 & 650-90 Pressure Sustaining Valve | Cla-Val

Cla-Val 50-90 / 650-90

Hydraulic, pilot-operated, modulating pressure sustaining valve. Maintains a preset upstream pressure and is used for pressure sustaining, pressure relief, back pressure, or unloading (by-pass) applications in fluid handling systems.

Operation

The valve modulates open only as required to maintain the set upstream pressure. In typical installations between high and low pressure zones, it prevents pressure loss from the upper zone when the lower zone experiences increased demand.

Applications

  • Water distribution network zoning
  • Protection of upper pressure zones
  • Pump by-pass lines
  • Back pressure control
  • Unloading lines in pump stations

Variants

  • 50-90: Full port, suitable for higher flow rates.
  • 650-90: Reduced port, for lower flows and improved control stability.

Construction

  • Connection: Flanged
  • Standard: ANSI
  • Pressure Classes: 150 lbs, 300 lbs
  • Materials: Bronze, ASTM A216 WCB, ductile iron

Selection Criteria

Selection is based on upstream pressure, set point, peak and minimum flow, backpressure, and cavitation risk. Pressure sensing location must represent the point requiring protection.

FAQ

Is this the same as a pressure reducing valve?
No. PRVs control downstream pressure. The 50-90 / 650-90 maintains upstream pressure.

Is electrical power required?
No. Standard operation is hydraulic via pilot control.

Standard (Options)
  • ANSI
Connection (Options)
  • Flanged
Material (Options)
  • Bronze
  • ASTM A216 WCB
  • Ductile Iron
Pressure Rating (Options)
  • 150 lbs
  • 300 lbs

Datasheet and documents

Description

Cla-Val Models 50-90 and 650-90 Pressure Sustaining Valves are hydraulically operated, pilot-controlled, modulating valves designed to maintain constant upstream pressure within close limits. These valves can be used for pressure relief, pressure sustaining, back pressure, or unloading functions in a by-pass system. In a typical application, 50-90 and 650-90 valves are installed between an upper zone and a lower area of heavy demand. The valves act to maintain desired upstream pressure to prevent “robbing” pressure from the upper zone while maintaining smooth control and positive pressure regulation.