(1) engineering application of 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 the functional requirements, select the valve type, and then according to the pipeline transportation medium, 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 nominal pressure of the valve has 0.6,1.0,1.6,2.5 and 4.0MPa and other different levels, the pipeline transport medium, the working pressure should be less than the nominal pressure of the valve.

(4) The water conservancy control valve shall be provided with sufficient space for management, operation, installation and maintenance, and shall comply with the requirements of the piping valve.

(5) When the flange connection is adopted, the hydraulic control valve connected with the flange should be used. When the groove is connected with the groove, the water control valve connected by the groove should be used.

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

(7) Water control valve The direction of the arrow on the main valve body must be consistent with the flow of the piping system.

(8) then water 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.

(9) When the valve is installed horizontally, the bonnet and stem should face up. When the vertical installation, the valve cover, stem should be outward.

(10) the valve should be installed before the strength and rigidity of the test.

(11) 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.