Water control valve design selection points

Hydraulic control valve should be installed horizontally. Horizontal installation, the valve cover should be up. Fire water supply system after the valve should have drainage facilities. Automatic sprinkler system to be decompression, the pressure relief valve should be set in front of the alarm valve (along the flow direction), with a single alarm valve supporting the set of pressure relief valve, equipment can not use pressure relief valve; with a number of alarm valve Set the pressure relief valve, should be equipped with plant pressure reducing valve. For the hot water supply project pressure reducing valve, should use hot water type pressure reducing valve.

1. engineering applications in the hydraulic control valve is qualified by the factory inspection, a variety of complete identification, technical information to meet the requirements of the product.

2. according to functional requirements, select the valve type, and then according to the pipeline transport media, temperature, building standards and owners to request, to determine the valve body and sealing parts of the material. Commonly used valve body materials are cast iron, copper and iron, copper, plastic and so on. Commonly used sealing and lining materials are copper alloy, plastic, steel, hard alloy, rubber and so on. The body material should match the pipe material.

3. the valve nominal pressure of 0.6,1.0,1.6,2.5 and 4.0MPa and other different levels, the pipeline transport of the media, the working pressure should be less than the nominal pressure of the valve.

4. the hydraulic control valve in the project should have sufficient space for management, operation, installation and maintenance, and should meet the requirements of the pipeline on the valve (5) pipe flange connection should be used flange connection Hydraulic control valve; pipeline with trench connection, should be used to connect the trench hydraulic control valve.

5. water control valve should be set in the media on the one-way flow of the pipeline.

6. water control valve The direction of the arrow on the main valve body must be consistent with the pipeline system flow.

7. then the hydraulic control valve section should not have air block, air resistance phenomenon. At the highest position of the pipe network, the automatic exhaust valve should be set.

8. the valve level of installation, bonnet, stem should be up. When the vertical installation, the valve cover, stem should be outward.

9. the valve should be installed before the strength and rigidity of the test.

10. the strength and rigidity of the valve test should meet the following requirements.

A. the strength of the valve test pressure is 1.5 times the nominal pressure;

B. the rigidity of the valve test pressure of 1.5 times the nominal pressure;

C. the test pressure should remain unchanged for the duration of the test, and there shall be no leakage of the packing and the sealing surface of the valve;

D. the duration of the valve test by the above table.

When the life, production, fire water supply system of the pool (box) when the inlet pipe diameter greater than or equal to 50mm should be set when the remote control float valve. The nominal diameter of the remote control float shall be the same as the nominal diameter of the pipe.