Pressure Reducing Valves - (High and Low Pressure)
Pressure Regulating Valve: (View Pressure Regulating Valve PDF [261 kb])
Accurately maintains a constant preset downstream pressure, regardless of changing upstream pressures or flow rates. A ratio of up to 3:1 can be achieved. The controlled response is designed to ensure stability and minimal line surging when the downstream flow changes rapidly.
- Pilot controlled
- Downstream pressure can be regulated from 0.8 MPa to 20 MPa
- Operation at differential pressure of up to 10 MPa
External Ratio Valves: (View External Ratio Valves PDF [512 kb])
Reduces a high inlet pressure into the valve to a low downstream pressure according to a fixed ratio with optional ratio trim to compensate for line pressure losses. Pressure ratios from 1,2:1 up to 3:1 can be achieved. The design of the valve was done with specific emphasis on minimizing noise, cavitations and flow surging.
- Stable control over the full range of operation from 0 to 100% flow capacity
- Pressure ratios can be altered by changing the size of the external control piston
- Ratio will remain within 7% at all flow rates
- Operates at differential pressures of up to 15 MPa
- Finite pressure adjustment control is optional
Multi Stage Ratio Valve: (View Multi Stage Ratio Valve PDF [71 kb])
Reduces pressure at a fixed ratio but because of the many internal stages it can reduce the pressure over larger ratios than is possible in one or two single stage valves in series. Pressure ratios of up to 20:1 can be achieved. The design of the valve was done with specific emphasis on flow surging and a high pressure ratio capability.
- Constant ratio with varying flow, resulting in a stable downstream pressure
- Pressure ratios can be altered by adding more stages
- Finite pressure adjustment control is optional
- Ratio will remain within 7% at all flow rates