Once you’ve chosen your valve design, it’s time to select the high-pressure water valve configuration that will best suit your needs. Both poppet and spool valves can be configured for a variety of high-pressure applications:
1. Isolation: When configured as a two-way isolation valve, the valve will have two ports, an inlet and an outlet. The purpose of the isolation valve is to either allow or shut off flow.
2. Directional control: Directional valves are used to extend and retract hydraulic cylinders such as those typically used in a forging press.
3. Pump bypass: In high-pressure water hydraulic systems with centrifugal pumps, the pump needs chieve minimum flow for cooling at all times. Pump bypass valves are ported to direct water back to the flume or reservoir to recirculate through the pump when there is no system demand, so that that the pump does not overheat.
4. Check: Check valves prevent flow back into the circuit that is caused by multiple pump sources of pressure. Flow can only occur in one direction through a check valve.
5. Prefill: Used to reduce water hammer and damage to the upper header nozzles as well as filling pipes for hydro testing. Prefill water can be supplied from a low pressure water source or from the high pressure system when used in conjunction with a pressure breakdown orifice.
6. Safety: Safety valves are typically poppet style and are installed in circuits to prevent system overpressure. When the valve detects a pressure greater than the set limit, flow is directed to a relief port.
Make an Informed Choice Remember, the industrial valve selection process should begin during the system design phase. At that point, you should specify your system parameters, including flow media, pressure ranges, flow rates and cycle frequency. Using this information, you will need to choose the ideal valve design and configuration.
With numerous configurations available for both spool and poppet valves, you have many options to choose from when designing a high-pressure water hydraulic circuit. Considering the required operating parameters of the system as well as the valve design and configuration will help you pick the best valve for your high-pressure application.
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