The installation environment and precautions for vacuum ball valves are crucial for their normal operation and service life. The following are environmental factors and precautions to consider when installing vacuum ball valves:

Installation environment requirements

1. Temperature range

Vacuum ball valves are typically suitable for standard environments ranging from -25 ℃ to+120 ℃. If the temperature of the working medium exceeds this range, high-temperature resistant seals (up to+230 ℃) should be selected to avoid seal failure.

2. Pressure range

The valve needs to operate within the designed vacuum or positive pressure range. Before installation, it is necessary to confirm whether the system pressure matches the nominal pressure of the valve to prevent valve damage caused by overpressure.

3. Media compatibility

Suitable valve body materials (such as stainless steel, aluminum alloy) and sealing materials (such as rubber O-rings, metal bellows) should be selected based on the characteristics of the medium (such as corrosiveness, particle content) to ensure sealing and durability.

4. Cleanliness requirements

The installation environment should be kept clean to prevent impurities such as dust and oil from entering the interior of the valve. The residual welding slag, iron filings, etc. inside the pipeline need to be thoroughly removed to prevent damage to the sealing surface.

5. Space limitations

The installation position should reserve sufficient space for operation and maintenance to ensure that the valve handle and actuator (such as pneumatic and electric devices) can rotate or move normally.

Installation precautions

1. Coaxiality and support of pipelines

Before installation, it is necessary to ensure that the pipeline is coaxial with the valve, the flange surface is parallel, and the deviation does not exceed the allowable range.

If the pipeline cannot withstand the weight of the valve, a support structure needs to be added to prevent the valve from deforming or leaking due to uneven stress.

2. Sealing gasket and bolt fastening

Select appropriate sealing gaskets (such as rubber or metal wrap gaskets) according to pipeline design requirements to ensure sealing performance.

The flange bolts should be tightened symmetrically, sequentially, and evenly to avoid local over tightening and damage to the tight cover.

3. Valve direction and identification

The direction of the valve arrow should be consistent with the flow direction of the medium to ensure the normal opening and closing of the valve.

Before installation, it is necessary to check the valve nameplate to confirm that the model, specifications, and design requirements are consistent.

4. Installation of actuator

Valves equipped with pneumatic and electric actuators should be installed vertically, with the inlet and outlet kept horizontal to ensure smooth operation of the actuator.

The connection of gas source and power supply should be operated according to the instructions to avoid reverse installation or wiring errors.

5. Check after installation

After installation, multiple opening and closing tests are required to confirm that the valve operates flexibly and without any blockage.

After pressurization, check the sealing performance of the valve and pipeline flange joint surface to ensure no leakage.

Precautions for operation and maintenance

1. Slowly open and close the valve

When opening and closing the valve, it should be operated slowly to avoid excessive force that may damage the sealing surface or actuator.

2. Regular maintenance and upkeep

Regularly check the sealing performance of the valve and clean the impurities in the valve body cavity.

Lubricate moving parts such as valve stems and actuators to ensure flexible operation.

3. Prevent overload use

Avoid operating valves in environments that exceed design pressure or temperature to prevent seal failure or valve damage.

4. Timely replace damaged parts

When problems such as aging seals and worn valve stems are discovered, it is necessary to replace the components in a timely manner to avoid the expansion of the fault.