Explosion-proof Pneumatic Control Valve

2 week ago

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3 year

Product details

Pneumatic control valves are widely applied in various industrial conditions due to their diverse structures, precise control, and strong adaptability. Below are their main applicable conditions and characteristics:

1. High-Pressure Differential and Flashing/Cavitation Conditions

• Multi-stage Pressure Reduction Design: Suitable for high-pressure differential environments, it gradually reduces pressure through multi-stage pressure reduction valve cages (sleeves), preventing flashing and cavitation phenomena and extending valve lifespan.

• Cavitation Resistance: Special trim structures (such as multi-hole sleeves) can reduce fluid noise and minimize cavitation damage to valve internals.

2. Extreme High/Low Temperature Environments

• High-Temperature Type: Features a metal sealing ring structure, suitable for temperatures up to 550℃ (e.g., high-temperature steam, hot oil systems).

• Low-Temperature Type: Incorporates an extended bonnet design, suitable for cryogenic media at -196℃ (e.g., liquefied natural gas, liquid nitrogen).

3. Corrosive Media

• Fluorine-Lined Valves: Used for highly corrosive media such as strong acids and alkalis (e.g., hydrochloric acid, sulfuric acid), lined with materials like PTFE and PFA.

• Stainless Steel/Alloy Valve Bodies: Such as 316L and HC276, suitable for corrosive fluids in the chemical and pharmaceutical industries.

4. High-Precision Flow Control

• Equal Percentage/Linear Flow Characteristics: Suitable for applications requiring precise regulation (e.g., chemical reactors, heat exchangers).

• High Rangeability (30:1~50:1): Ideal for regulating a wide range of flow rates.

5. Special Industrial Applications

• Petrochemical Industry: Handles high-pressure, high-temperature, and corrosive media (e.g., refining, cracking units).

• Power Industry: Regulates steam (e.g., boiler feedwater, turbine control).

• Water Treatment/Environmental Protection: Used in wastewater treatment, acid-base neutralization, and other conditions.

6. Other Special Requirements

• Low Leakage Requirements: Soft-seated valve seats (e.g., PTFE) can achieve ANSI B16.104 Class VI sealing, suitable for toxic or hazardous media.

• Explosion-Proof Environments: Explosion-proof actuators can be used in flammable and explosive settings (e.g., oil and gas pipelines).

Summary

Pneumatic control valves are suitable for a wide range of conditions. When selecting a valve, it is essential to consider media characteristics (corrosiveness, temperature, pressure), flow control accuracy, and environmental requirements (explosion-proof, low noise). Specific models (such as cage-guided, multi-stage pressure reduction, fluorine-lined) should be matched according to actual conditions.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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