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Water conservancy control valve
- Categories:Industry Knowledge
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- Time of issue:2016-01-15 14:39
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(Summary description)Waterconservancycontrolvalveisthevalveofwaterpressurecontrol.Thehydrauliccontrolvalveconsistsofamainvalveanditsattachedconduit,pilotvalve,needlevalve,ballvalveandpressuregauge.Accordingtothepurposeofu
Water conservancy control valve
(Summary description)Waterconservancycontrolvalveisthevalveofwaterpressurecontrol.Thehydrauliccontrolvalveconsistsofamainvalveanditsattachedconduit,pilotvalve,needlevalve,ballvalveandpressuregauge.Accordingtothepurposeofu
- Categories:Industry Knowledge
- Author:
- Origin:
- Time of issue:2016-01-15 14:39
- Views:
Information
Water conservancy control valve is the valve of 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 be evolved 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 water conservancy control valve, and it should be easy to drain. This type of valve should generally be installed horizontally in the pipeline. 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. (Note: The general consumable damage products in the inner valve are diaphragm and ...
However, there are still some misunderstandings in the application of water conservancy control valves in engineering, such as valve application conditions, valve design and selection requirements, installation points, etc. For this reason, this article intends to use the CECS standard "Hydraulic Control Valve Application Design Regulations" (submitted for review Draft) as the basis, combined with my own experience to explain the {TodayHot} issues in the above-mentioned aspects.
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, building 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 of the valve.
(4) The installation of water conservancy 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 shall be adopted; when the pipeline adopts the groove connection, the groove connection hydraulic control valve shall be adopted.
(6) The water conservancy 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 water conservancy 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 water conservancy control valve. An automatic exhaust valve should be installed at the highest position of the pipe network and other gas storage sections.
(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.
When the nominal diameter of the water inlet pipe of the pool (tank) of the living, production, and fire water supply system is greater than or equal to 50mm, a remote floating ball valve should be installed. The nominal diameter of the remote control float should be the same as the nominal diameter of the pipeline. A filter should be installed before the remote control float valve, and the filter should meet the following requirements:
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