The valve is the control part of the pipeline. Today, the knife gate valve , flange butterfly valve , blind plate valve , sleeve valve , flapper valve , gate , hoist and other general and non-standard valve manufacturers - Zhongdao valve Xiaobian tell everyone about 6 way installation of pipeline valve :

First, the gate valve

Also known as the gate valve, the valve is used to control the opening and closing of the valve, and the flow rate of the pipeline is adjusted and the pipeline is opened and closed by changing the cross section. Gate valves are mostly used for pipes that are fully or fully closed to fluid media.

Gate valve installation is generally non-directional, but cannot be flipped.

Second , the stop valve

It is a valve that uses a valve flap to control opening and closing. The medium flow or the medium path is cut by changing the gap between the valve flap and the valve seat, ie changing the cross-section of the passage. The flow of the fluid must be observed when installing the shut-off valve.

The principle that must be observed when installing the shut-off valve is that the fluid in the pipeline passes through the valve hole from bottom to top, commonly known as “low-in and high-out”, and is not allowed to be reversed.

Third, the check valve

Check valve, also known as check valve and check valve, is a valve that automatically opens and closes under the pressure difference between the front and the back of the valve. Its function is to make the medium flow only in one direction, and prevent the medium from flowing backwards.

The check valve has a lift type, a swing type and a butterfly clip type according to its structure. The lift check valve is divided into horizontal and vertical.

When installing the check valve, attention should also be paid to the flow direction of the medium, which cannot be reversed.

Fourth, the pressure reducing valve

1. The vertically installed pressure reducing valve group is generally placed along the wall at a suitable height from the ground; the horizontally installed pressure reducing valve group is generally installed on a permanent operating platform.

2. The applied steel is loaded into the wall outside the two control valves (usually used for the shut-off valve) to form the bracket, and the bypass pipe is also stuck on the bracket to level the alignment.

3. The pressure reducing valve should be installed upright on the horizontal pipe, and should not be inclined. The arrow on the valve body should point to the flow direction of the medium and should not be reversed.

4. Both sides should be equipped with a shut-off valve and high and low pressure gauges to observe the pressure changes before and after the valve. The diameter of the pipe after the pressure reducing valve should be larger than the diameter of the inlet pipe before the valve 2#-3#, and the bypass pipe is installed for maintenance.

5. The pressure equalizing pipe of the membrane type pressure reducing valve should be connected to the low pressure pipe. For low pressure pipelines, safety valves should be provided to ensure safe operation of the system.

6. When used for steam decompression, set the drain pipe. For piping systems that require a high degree of purification, a filter is placed in front of the pressure reducing valve.

7. After the installation of the pressure reducing valve group, pressure reducing valve and safety valve should be pressure tested, flushed and adjusted according to the design requirements, and the adjusted mark should be made.

8. When flushing the pressure reducing valve, close the pressure reducing valve inlet valve and open the flushing valve for flushing.

Five, trap

1. A shut-off valve (stop valve) shall be provided before and after. A filter shall be provided between the trap and the front shut-off valve to prevent dirt in the condensed water from clogging the trap.

2. An inspection tube should be set between the trap and the rear shut-off valve to check whether the trap is working normally. If the inspection tube is opened for a large amount of steam, the trap is broken and needs to be repaired.

3. The bypass pipe is provided to discharge a large amount of condensed water at the time of starting, and to reduce the displacement load of the steam trap.

4. When the trap is used to remove the condensate from the heat equipment, it should be installed in the lower part of the heat equipment, so that the water pipe is returned vertically to the steam trap to prevent water from being stored in the heat equipment.

5. The installation location should be as close as possible to the drainage point. If the distance is too far, air or steam will accumulate in the elongated pipe in front of the trap.

6. Hydrophobic issues should be considered when the steam mains pipeline is too long.

Sixth, safety valve

1. The product must be carefully inspected before installation to verify whether there is a certificate of conformity and product specifications to clarify the pressure at the factory.

2. Safety valves should be placed as close as possible to the platform for inspection and maintenance.

3. The safety valve should be installed vertically, so that the medium should flow out from the bottom to the top and check the verticality of the stem.

4. Under normal circumstances, the shut-off valve cannot be installed before and after the safety valve to ensure safety and reliability.

5. Safety valve pressure relief: When the medium is liquid, it is generally discharged into the pipeline or closed system; when the medium is gas, it is generally discharged to the outdoor atmosphere.

6. The oil and gas medium can generally be exhausted to the atmosphere. The outlet of the safety valve venting pipe should be higher than the surrounding zui high structure by 3m, but the following conditions should be arranged in a closed system to ensure safety.

7. The diameter of the population pipeline, Zui should be equal to the inlet diameter of the valve; the diameter of the discharge pipe should not be smaller than the diameter of the outlet of the valve. The discharge pipe should be led to the outside and installed with a curved pipe so that the pipe outlet faces the safety zone.

8. When the safety valve is installed, when the connection between the safety valve and the equipment and piping is open-hole welding, the diameter of the opening should be the same as the nominal diameter of the safety valve.

Inheriting the spirit of craftsmen and promoting Chinese culture, Zhongdao Valve will practice with you! ! !

company culture:

The company has consistently adhering to the "integrity first, promote artisan spirit," the business, the firm honest and trustworthy, pragmatic attitude, to carry out service upgrades, and constantly improve customer satisfaction; promote specializes in focus, the better craftsman's spirit, leading the technical innovation Improve product quality, rely on honest management, pioneering and innovative, continuously improve customer service satisfaction, continue to win customers' favor, have a good reputation and reputation, and always occupy an important share in the national key project valve procurement market , the company is determined to build a Chinese famous brand The export volume of foreign trade continued to grow, and it was highly praised by international friends for its high cost performance .

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