SCH8O/DIN Pneumatic UPVC Flange Diaphragm Valve

Pneumatic UPVC flange diaphragm valve vs other valves: fluid control advantages in key industries

In industrial fluid control systems, pneumatic UPVC flange diaphragm valves have shown significant advantages in many key areas due to their unique structure and material characteristics, especially in corrosive media, high purity requirements and harsh working conditions. In contrast, traditional valves (such as ball valves, butterfly valves, gate valves, etc.) may have deficiencies in sealing, corrosion resistance or maintenance costs. The following is a comparison of its core advantages and applications in various industries:

1. Safe Drinking Water & Drinking Water
Advantages: UPVC material is non-toxic and meets hygiene standards. The diaphragm design prevents contact between the medium and metal parts to avoid secondary contamination.

Comparison: Metal valves are prone to rust, fluorine-lined valves are expensive, and UPVC diaphragm valves are both economical and safe.

2. Metallurgy
Advantages: Resistant to acids, alkalis and corrosive chemical media (such as electroplating liquids and pickling wastewater), the corrosion resistance of the UPVC valve body is far better than that of ordinary carbon steel valves.
Comparison: The ball valve seat is easily worn by particles, and the diaphragm valve has a dead angle structure that can tolerate fluids containing impurities.

3. Photovoltaic & Electronic Semiconductor
Advantages: Ultra-high purity fluid control, no risk of metal ion precipitation, and pneumatic drive to avoid lubricating oil pollution.
Comparison: Butterfly valves have poor sealing performance, and UPVC diaphragm valves are more suitable for ultra-pure water and chemical delivery systems.

4. Nuclear Power
Advantages: Strict anti-leakage requirements, the double-layer sealing structure of the diaphragm valve can cope with radioactive media, and UPVC is resistant to radiation aging.
Comparison: Gate valve packing is prone to leakage, and diaphragm valves are safer to maintain.

5. Medicine
Advantages: Meets GMP standards, the inner wall of the valve body is smooth and residue-free, and is suitable for sterile fluids (such as liquid medicine, water for injection).
Comparison: Traditional valves have many dead angles for cleaning, and diaphragm valves can be cleaned online by CIP/SIP.

6. Industrial Water Treatment & Wastewater
Advantages: Resistant to strong oxidants such as chlorine and ozone, flange connection ensures sealing under high pressure conditions, suitable for sewage treatment and RO systems.
Comparison: Butterfly valves are commonly used in low pressure and high flow, but diaphragm valves have a longer life in corrosive media.

Summary of core advantages
Zero leakage: The diaphragm design completely isolates the medium and the valve stem to eliminate the risk of leakage.
The king of corrosion resistance: UPVC valve body is more reliable than metal valves in acid, alkali and salt environments.
Low maintenance: No complex mechanical structure, only the diaphragm needs to be replaced regularly to reduce downtime costs.
Clean and safe: No pollution, no dead corners, meeting high purity and sanitation requirements.