Pressure reducing valve pdf

THE PRESSURE REDUCING VALVE : DEFINITION This valve reduces the pressure of the water that goes through it, and is used to obtain a regulated and constant value at its outlet. It is installed at the water mains (for a bungalow as for a flat). Two-stage reduction is recom- mended when the initial pressure is 150psi or greater, or when the desired pressure reduction ratio is greater than 3:(e.g. from 150psi to 50psi), or when the inflow pressure fluctuates greatly.

This approach helps prolong valve life and provide more precise pres- sure regulation. Pressure reducing valves are used to set the pressure of a hydraulic circuit below that of the main circuit.

In addition, operation under remote control is possible by using the remote control port. Water hammers can damage the reducing valve. When commissionning, open slowly and gradualy the valve at the upstream side. A booster unit with a sudden start close to the pressure reducer requires the safety of an absorption tank.

Just like by any intervention on the pipe work, the circuits must be rinsed beforhand. These two-stage pressure reducing valves allow full flow from inlet to outlet port until the reduced pressure setting is reache whereupon the outlet flow is closed off. Reduced pressure setting is manually adjustable at the pilot stage.

Five ranges of reduced pressure adjustment are. Models DR are pilot operated reducing valves. They reduce pressure in a branch circuit lower than that of the main circuit.

The valve design is capable of maintaining a precise pressure setting even at high flow. Pressure Reducing Valves are designed to reduce incoming water or steam pressure to a safer constant predetermined downstream level. Pressure can be regulated by, downstream of the valve , pressure reducing , or, upstream of the valve , pressure sustaining. A pressure sustaining example is shown in Figure 5-5. There are three water-cooled units: A, B, and C. Water is pumped from the open tank through the units and drains back into the open tank.

What is the function of a pressure reducing valve? How does a pressure reducing valve work? Be Prepared For Your Next Job With the Best Valve s Available. Hear What Our Customers Say: Excellent Selection. Unparalleled Customer Service.

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Get Your Reducing Valve s Today! Get Reducing Valve s With Fast and Free Shipping on eBay. The Pressure Reducing Control Valve shall be a pilot operated diaphragm valve designed to automatically reduce a fluctuating higher upstream pressure to a constant lower downstream pressure regardless of vary-ing flow rates. The main valve shall be a hydraulically operate single diaphragm actuate globe or angle pattern valve.

B to port A via mian spool insert (3) until the pressure in port A exceeds the value set at spring (11) and opens the ball (6). The control spool (13) moves to the closed position. The desired reduced pressure is achieve when a balance between the pressure in port A and the pressure set at spring (11) is reached. A reducing valve is a regulating valve which keeps outlet pressure of fluid at a certain and lower level than inlet pressure. The original purpose of a reducing valve is, not just reducing the pressure of fluids, but also dynamically controlling the flow rate that fluctuates in response to load variations.

An increase in outlet pressure tends to close control (5) and a decrease in outlet pressure tends to open control (5). This causes main valve cover pressure to vary and the main valve (1) to modulate (open and close) maintaining a relatively constant outlet pressure. High-rise buildings, for exam- ple, often require pressure - reducing valves.

A pump that is capable of supplying the minimum acceptable pressure to the top floor will deliver excessive pressure to lower floors. To avoid rapid deterioration, two valves can be use one connected upstream to the other. In the pilot stage, there is a flow limiter which supplies the pilot valve with pressure -independent pilot oil flow from the pressure port P. Constant performance under pressure.

When faced with extreme pressures or anything in between, our pressure reducing valves maintain a uniform downstream pressure. Regardless of the problem, regardless of the application, our valves perform under pressure.