Some common problems may be encountered during the installation of sanitary diaphragm valves, which may affect the performance and service life of the valves. The following is a summary of these problems and the corresponding solutions:

I. Common Problems Before Installation

• The model and specification do not match

Problem: The operating conditions of the pipeline were not carefully checked against the applicable scope of the diaphragm valve, resulting in a mismatch between the selected model and specification.

Solution: Before installation, carefully check the operating conditions of the pipeline and the applicable scope of the diaphragm valve to ensure that the selected model and specification are in line with the design requirements.

• The appearance inspection was not careful

Problem: The appearance of the diaphragm valve was not comprehensively inspected, resulting in damage or deformation of the valve being found after installation.

Solution: Before installation, a comprehensive inspection of the appearance of the diaphragm valve should be carried out to ensure there is no damage or rust, and to check if the diaphragm is intact, free of cracks, holes or signs of aging.

Ii. Common Problems during Installation

• The connection is not tightened properly

Problem: When using bolts to fasten the valve body to the pipe flange, the tightening force was insufficient or excessive, resulting in leakage at the connection.

Solution: When fastening the valve body to the pipe flange with bolts, ensure a firm connection, but avoid over-tightening that may cause damage. After installation, check whether the connection points are tight. If any are loose, they should be tightened again.

• Diaphragm damage

Problem: During the installation process, the diaphragm was damaged due to improper operation or improper use of tools.

Solution: During the installation process, handle with care and avoid using sharp tools or applying excessive force to prevent damage to the diaphragm. If the diaphragm is found to be damaged, it should be replaced in time.

• Incorrect installation direction

Problem: The correct installation direction of the diaphragm valve was not determined in accordance with the installation requirements, resulting in the valve not opening and closing flexibly or leakage.

Solution: Before installation, carefully read the installation manual of the diaphragm valve to ensure that the correct installation direction is determined as required. After installation, the opening and closing status of the diaphragm valve should be checked to ensure it is flexible and free of jamming.

Iii. Common Problems and Solutions after Installation

• Leakage problem

Reasons: The connection is not tightened properly, the diaphragm is damaged, the sealing surface is deformed, etc.

Solution: Check if the connection points are tight. If any are loose, re-tighten them. Check if the diaphragm is damaged. If so, it should be replaced. Check whether the sealing surface is deformed or damaged. If so, it should be repaired or replaced.

• It is not flexible to open and close

Reasons: The operating mechanism is stuck, the diaphragm is too tight, etc.

Solution measures: Check whether the operating mechanism is flexible. If there is any jamming, it should be cleared. Check if the diaphragm is too tight. If so, adjust the tightness.

Iv. Other Precautions

• Avoid applying grease: Do not apply grease items to the rubber lining layer and the surface of the rubber diaphragm of the sanitary diaphragm valve to prevent rubber swelling and affect the service life of the diaphragm valve.

• Protect the handwheel or transmission mechanism: The handwheel or transmission mechanism must not be used for lifting and must not be collided with.

• Correct operation: When manually operating the sanitary diaphragm valve, do not use the auxiliary lever to prevent excessive torque from damaging the driving components or sealing parts.

• Storage requirements: Sanitary diaphragm valves should be stored in a dry and well-ventilated indoor area. Stacking is strictly prohibited. Both ends of the stored diaphragm valves must be sealed, and the opening and closing parts should be in a slightly open state.

In conclusion, during the installation of sanitary diaphragm valves, multiple aspects need to be noted, including the preparation before installation, the operation during installation, and the inspection and testing after installation. Only by ensuring that each step is correct and error-free can the normal operation and service life of the diaphragm valve be guaranteed.