Product Description

Pneumatic Fixed Ball Valve

Product Introduction

Technical Specifications

• Nominal Diameter: NPS 1/2" ~ 64" (DN25 ~ DN600)
• Nominal Pressure: Class 150 ~ 2500LB / 1.6MPa ~ 10MPa
• Operating Temperature: -196C ~ 450C
• Applicable Media: Water, gas, oil products, natural gas, and acid/alkali corrosive media

Product Features

1. Body Structure

   The fixed ball valve body can be designed in three forms according to user needs and actual working conditions: cast, forged, and fully welded. Fully welded ball valves are mainly used for buried applications.
2. Valve Seat Sealing Structure

   Fixed ball valves can select front seat sealing, rear seat sealing, or front-and-rear double sealing structures based on pressure level, media properties, and sealing requirements.
3. Automatic Pressure Relief Structure

   When the pressure in the middle cavity rises abnormally, single-seat ball valves have an automatic pressure relief function. For double-seat ball valves, pressure relief is handled by an additional pressure relief device on the valve body.
4. Emergency Seal Repair

   If leakage occurs due to damage to the valve seat or stem seals, sealant injected through the grease injection valve can provide an immediate sealing effect.
5. Fire-Safe Structure

   The ball valve can be designed with a fire-safe structure according to working conditions and user requirements. The fire-safe design complies with standards including API 607, API 6FA, and JB/T 6899. If the soft sealing ring is damaged by fire, the fire-safe structure prevents large-scale medium leakage and stops the fire from spreading.
6. Anti-Static Structure

   Friction between the ball and valve seat during operation generates static electricity that accumulates on the ball. To prevent static sparks, an anti-static device is installed on the valve to discharge the accumulated charge from the ball.
7. Blocking and Drainage

   When the valve is closed, the upstream and downstream valve seats block fluid flow. Accumulated debris in the valve body cavity can be drained through the drain device.
8. Locking Device

   Lockable structures are designed at the fully open and fully closed positions of manual ball valves. This prevents misoperation and unintended switching caused by unpredictable line vibration. This feature is particularly valuable in flammable petroleum and chemical production lines, as well as outdoor piping applications.
9. Full Bore and Reduced Bore Structures

   To meet different user needs, the ball valve is available in both full bore and reduced bore versions. Full bore ball valves have a channel inner diameter consistent with the pipe inner diameter, facilitating line cleaning. Reduced bore ball valves are relatively lighter, with fluid resistance only about 1/7 of that of a same-size globe valve, offering broad application prospects.