China Pressure Reducing Valve Factory
China Pressure Reducing Valve Factory
China Pressure Reducing Valve Factory Product introduction
China presure reducing valve manufacturer, factory and supplier for steam, air, gas, water pressure reducing valve.There are many structures pressure reducing valve, you can choose the suitable type according to your working pressure, working temperature and medium performance. Pressure reducing valve is applicable to urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection and other industries.
Pressure reducing valve introduction
In its normal position before start-up, the main valve is closed and the pilot valve opens by spring air pressure or spring force. Steam passes via the pilot valve to the diaphragm chamber and out via the control orifice. When the flow through the pilot valve becomes more than the flow via the orifice, the diaphragm control pressure increases and the main valve opens. When the steam flows via the main valve, the downstream pressure increases and it feeds back through the pressure sensing line to the lower side of the pressure diaphragm. As the compression force and the force below the diaphragm balance, the pilot valve throttles. The main diaphragm control pressure maintained places the main valve to release enough steam needed for delivery pressure. Adjusting the air pressure or spring above the diaphragm alters the downstream pressure. When no steam is required, the sensing line pressure is increased which closes the pressure pilot while control pressure flows back via the control orifice. This helps the main valve in holding the needed pressure and it can close tight to enhance dead-end shutoff.
Pressure reducing valve application
1. Pressure reducing valve is used to reduce varying or steady inlet pressure to enhance constant adjustable outlet pressure. In this case, the incoming pressure operates the valve. As the outlet pressure comes close to the spring setting on a pilot, the steam pressure reducing valve starts modulating and maintains set pressure.
2. Pressure reducing valve is used to reduce high inlet pressure to low outlet pressure for the delivery of steam.
3. Pressure reducing valve is used to provide make-up steam for the turbine exhaust main. When the load in a turbine reduces and the exhaust of the turbine is not enough for steam load, some slight drop in exhaust pressure makes the valve feed the right quantity of steam as per the demand.
4. Pressure reducing valve is used to distribute steam from overloaded boilers in essential services.
5. Pressure reducing valve is used in sterilizers and unit heaters to lower varying or steady inlet pressure to constant delivery pressure.
China Pressure Reducing Valve Factory Related Products
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