How to inspect and verify a quality pneumatic butterfly valve.

In the pipeline industry, the pneumatic butterfly valve is a well-known device. The quality of the product determines the quality of the engineering project. So what requirements should a high-quality pneumatic valve meet, and how should its performance be tested?

When manufacturers produce valves of the required specifications and models for engineering projects, they must first conduct authoritative performance testing on the products to ensure product quality.

Product Quality Testing:

Valve Flow Resistance Coefficient Testing: The valve shall be installed in the pipeline for water conveyance. The valve's opening and closing torque shall be tested under normal working pressure to ensure that the valve can complete the required number of opening and closing cycles, with tight and continuous sealing when closed.

Pre-Delivery Testing:

Internal pressure testing shall be carried out with the pneumatic valve in the open operating position, to verify whether the valve body can withstand a pressure twice the rated working pressure. With the valve in the closed position, it shall be tested to withstand 1.1 times the working pressure from both sides, ensuring tight sealing performance with no leakage.