How to install pipeline valves?.

In the previous article, we introduced the basic knowledge of different valves. Do you know how different valves are installed in the pipeline? Let us understand in detail below.

 

 

Different valve installation methods

1. Gate valve

The gate valve is a valve that uses the gate to control the opening and closing, and adjusts the pipeline flow and opens and closes the pipeline by changing the cross section. Gate valves are mostly used for pipelines that fully open or fully close the fluid medium. Gate valve installation generally has no directional requirements, but it cannot be inverted.

 

 

2. Globe valve

The valve is used to control the opening and closing of the valve. By changing the gap between the valve disc and the valve seat, that is, changing the size of the channel section to adjust the medium flow or cut off the medium passage. Pay attention to the direction of fluid flow when installing the shut-off valve.

 

The principle that the shut-off valve must be installed is that the fluid in the pipeline passes through the valve hole from bottom to top, commonly known as "low inlet and high outlet", and no reverse installation is allowed.

 

 

3. Check valve

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

 

According to the different structure of the check valve, there are lift type, swing type and butterfly wafer type. Lift check valve is divided into horizontal and vertical. When installing the check valve, you should also pay attention to the flow direction of the medium.

 

 

4. Pressure reducing valve

Vertically installed pressure reducing valve sets are generally installed along the wall at a suitable height from the ground; horizontally installed pressure reducing valve sets are generally installed on a longer operating platform. The applied section steel is loaded into the wall on the outside of the two control valves (usually used for shut-off valves) to form a bracket. The by-pass pipe is also stuck on the bracket and leveled.

 

The pressure reducing valve should be installed upright on the horizontal pipeline, and should not be inclined. The arrow on the valve body should point to the direction of the medium flow, and it should not be installed backwards. Stop valves and high and low pressure gauges should be installed on both sides to observe the pressure changes before and after the valve.

 

 

5. Safety valve

Before installation, the product must be carefully inspected to verify whether there is a certificate of conformity and product instructions to clarify the constant pressure at the factory. The safety valve should be arranged as close to the platform as possible for inspection and maintenance.

 

The safety valve should be installed vertically, the medium should flow from bottom to top, and the verticality of the valve stem should be checked. Under normal circumstances, shut-off valves cannot be set before and after the safety valve to ensure safety and reliability.