High plus outlet four-way valve (high plus outlet check valve)
Material of main parts of Gaoka import and export four-way valve
Body: high-quality carbon steel, bonnet: high-quality carbon steel
Stem: chrome-molybdenum steel, seal: reinforced flexible graphite
Disc: Carbide, seat: Carbide
Filler: flexible graphite, bracket: carbon steel
主要型号规格： Main models and specifications of Gaoka import and export four-way valve :
Model: H61Y; H62Y
Nominal pressure: PN 20.0, 25.0, 30.0mpa
Nominal diameter: DN 175, 225, 275, 300mm
High check outlet check valve is generally suitable for clean media, and should not be used for media containing solid particles and high viscosity.
Structural features of Gao Jia import and export four-way valve :
1. The middle cavity of the valve adopts a pressure self-tight structure, which has good sealing performance;
2. The upper part of the valve is designed with a handwheel tightening structure. When disassembling and repairing the high pressure, unscrew the handwheel to tighten the valve flap to prevent the water from leaking into the high pressure and causing damage to the sealing surface. And when the valve is blocked by accident, it can be closed smoothly;
3. The inlet valve adopts an external piston chamber structure, and the control medium is condensed water. The control system has high reliability because it works at low temperature, low pressure and low pressure difference;
The series of inlet valve (inlet valve) and outlet valve (outlet check valve) for high-pressure feedwater heaters are used at the inlet and outlet of 50MW-600MW boiler high-pressure heaters as high-pressure protection valves. In the course of high-intensity operation, when a piping leak or a trap failure occurs, it will cause the water level on the steam side to rise and easily cause high-pressure feed water to be poured into the turbine. In order to prevent accidents, when the water level on the steam side reaches the alarm level, the electrical contact water level sender contact is turned on, the quick opening and closing solenoid valve is opened, the condensed water enters the inlet valve piston, the inlet valve flap is closed, and the inlet high feed water is cut off At the same time, the bypass is opened, the feed water enters the boiler through the bypass, and the high-pressure disengagement is performed to ensure the normal operation of the unit. When the input is high, the inlet valve flap automatically opens and cuts off the bypass under the pressure of the feed water in the system. The feed water enters the boiler after passing through the high-pressure heater, thereby improving the thermal efficiency of the power plant and ensuring the safe operation of the unit.
1. The inlet valve adopts an external piston chamber structure, and the control medium is condensed water. The control system has high reliability due to its operation at low temperature, low pressure, and low pressure difference;
2. The upper part of the valve is designed with a handwheel tightening structure. When disassembling and repairing the high pressure, the handwheel is tightened down to prevent the feed water from leaking into the high pressure, preventing leakage under the new high pressure caused by the sealing surface damage, and prevent misoperation Allow water to enter the high temperature, and prevent the valve flap from closing smoothly due to accidental jamming.
The high-pressure inlet and outlet four-way valve (H62Y, high-pressure outlet check valve) is as follows:
Due to the product improvement and technical innovation of Gaoka import and export four-way valve (H62Y, Gaoka outlet check valve) or some special requirements, the connection size of various valves may be changed, please contact Zhejiang Huada Valve Technology Department to Get the latest product information. We can also customize the valve according to your requirements.