300X slow closing check valve

One. Structure and characteristics

The 300X slow-closing check valve is an intelligent valve installed at the pump outlet of the water supply system of high-rise buildings and other water supply systems to prevent medium backflow, water hammer and water hammer. The valve has three functions: electric valve, check valve and water hammer eliminator, which can effectively improve the safety and reliability of the water supply system. It also integrates the technical principles of slow opening, quick closing, and slow closing to eliminate water hammer to prevent the occurrence of water hammer when the pump is turned on and when the pump is stopped. Just operate the water pump motor open and close button. The valve can be opened and closed automatically in accordance with the pump operation procedures, with large flow and small pressure loss. It is suitable for valves with a diameter of 600 or less.

    The hydraulic control valve is a valve for water pressure control. The hydraulic control valve consists of a main valve and its attached conduit, pilot valve, needle valve, ball valve and pressure gauge. According to the purpose of use, function and location, it can evolve into remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve, water pump control valve, etc.

    A filter should be installed before the 300X slow-closing check valve, and it should be easy to drain. The water conservancy control valve is a self-lubricating valve body that uses water, and no additional oil is required for lubrication. In case of damage to the parts in the main valve, please disassemble it according to the following instructions.

Two. Selection points

1. The hydraulic control valve used in the engineering type is a product that has passed the inspection of the manufacturer, has a complete variety of signs, and the technical data meets the requirements.

2. According to the functional requirements, select the type of valve, and then determine the material of the valve body and sealing part according to the pipeline transportation medium, temperature, construction standards and requirements of the owner. Commonly used valve body materials are cast iron, copper iron, copper, plastics and so on. Commonly used sealing surface and lining materials are copper alloy, plastic, steel, cemented carbide, rubber, etc. The valve body material should match the pipe material.

3. The nominal pressure of the valve has different levels such as 0.6, 1.0, 1.6, 2.5 and 4.0MPa. The working pressure of the medium transported by the pipeline should be less than the nominal pressure value of the valve.

4. The installation of hydraulic control valves in the project should have enough space for management, operation, installation and maintenance, and should meet the requirements of pipelines for valves.

5. When the pipeline adopts flange connection, the flange connection hydraulic control valve should be adopted; when the pipeline adopts the groove connection, the groove connection hydraulic control valve should be adopted.

6. The hydraulic control valve should be installed on the pipeline where the medium flows in one direction.

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

8. There should be no air blockage or air resistance in the pipe section of the hydraulic control valve. Automatic exhaust valves should be installed in the gas storage section such as the highest position of the pipe network.

9. When the valve is installed horizontally, the valve cover and valve stem should face upwards. When installed vertically, the valve cover and valve stem should face outwards.

10. The strength and tightness test should be done before the valve is installed.

11. The strength and tightness test of the valve should meet the following requirements.

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

B. The tightness test pressure of the valve is 1.5 times the nominal pressure;

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

D. The valve test duration is as per the above table.