Automatic recirculation valve (pump protection valve) performance advantages:
1. Automatic recirculation control valve including recycling stream decompression facilities, high-pressure medium through the flow around several small diameter, a lot of energy, and reduce stress.
2. Pump protection valves have only very low flow recirculation, cooling pump, then pump during normal operation, there is no recycling, saving for a continuous recycling of the consumption of electricity and water.
3. Automatic recirculation control valve does not require electrical wiring, do not need two valves in series, one for the adjustment, the other for cutting. And the high-pressure systems are prone to cable and high speed flow to minimize erosion.
4. Pump protection valve with reasonable design, stable running, no noise, long life, etc., can completely replace the imported products.
5. Valve should be installed vertically.
Uses: automatic recirculation valve is installed in the boiler feed pump exports, to pump up security protection. Pump protection valve (it) to the water pump is used to prevent low-load operation due to overheating, excessive noise, instability caused by cavitation damage.
As long as the pump flow to a certain low value, the auxiliary valve will automatically return the mouth to open, in order to ensure the minimum required pump flow.
Media into the body through the valve inlet, valve parts, but also feel the flow measured by, when the flow is less than the set value, the liquid through the hole on the seat and through the bypass valve stem is also the vacuum adjust the channel to do the bypass loop. When the outlet flow is greater than the set flow rate, fluid entering the main channel and gradually close the bypass, the normal flow. The bypass and the main road and export only the opening and closing volume. When the pump protection valve (automatic recirculation valve) the export of fluid backflow when the valve moves into a reverse check valve of the work process.
Valve guides and valve seat formed at the cavity of the composition of the buffer chamber, to avoid violent impact between the metal valve of valve damage caused to the ring.
Decompression decompression series bypass system is based on technical parameters set, you can also make single-stage can be made multi-level decompression.
Special rod design to overcome the usual minimum flow in the system is running near the shock generated by the system.
Pump protection valve (automatic recirculation valve) structural parameters:
1, Nominal Diameter: DN50 ~ 300
2, engineering pressure: PN10 ~ 320
3, bypass Size: 1/2DN (standard); or special
4, the recommended flow rate: 4 to 6 m / s up to 8 m / s
5, connections: flanged (ANSI or DIN)
6, cast steel, forged carbon steel, beryllium cast chrome-nickel-molybdenum stainless steel, chrome-nickel-molybdenum-beryllium steel forging
7, Trim Material: chrome steel forging forging forging chrome-nickel-chromium-molybdenum stainless steel
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