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Our Pneumatic Operator Explosion Proof Trunnion Ball Valve is a high‑performance quarter‑turn isolation valve that combines a robust trunnion‑mounted ball design with a pneumatic actuator equipped for explosion hazardous environments. Engineered for high pressure and harsh service, this valve offers reliable on/off control in critical piping systems where safety, longevity and automation are required.
The trunnion mounting provides secure ball anchoring (top & bottom) for reduced torque and long life, while explosion‑proof pneumatic actuation enables remote or automated operation in hazardous zones.
Trunnion‑mounted ball design: The ball is supported by upper and lower trunnions, enabling the seat rings to carry the load. This design provides low operating torque and reliable sealing under high pressure.
Explosion‑proof pneumatic actuator: The actuator is specifically certified for hazardous locations, preventing ignition and allowing safe operation in explosive atmospheres.
Robust body and materials: Available in materials such as Duplex 2205, stainless steel, carbon steel (and optionally super‑alloys) to handle high pressure, temperature extremes, corrosive media and long service life.
Fire‑safe / blow‑out proof construction: The body and internal components are designed for fire resistance and to prevent stem or shaft ejection under pressure.
Full automation interface: NAMUR or ISO 5211 mounting pads, solenoid valves, limit switches, positioners and accessories available for full remote or integrated control.
High reliability and tight shut‑off: Designed for low leakage (metal or soft seats), reduced maintenance, and long lifecycle under demanding service.
Safety in explosive atmospheres – With certified explosion‑proof pneumatic actuation, this valve is ideal for petrochemical, oil & gas, LNG, offshore, mining and other hazardous locations.
Reliability in harsh services – With fire‑safe and blow‑out proof features, the valve is built to handle demanding conditions with minimal downtime.
Upstream/mid‑stream oil & gas pipelines, onshore or offshore platforms
Petrochemical and chemical processing plants handling hazardous fluids or gases
LNG and cryogenic systems (with special low‑temperature design)
Power generation (steam, high pressure fluid systems)
Mining, metals, pulp & paper, where high pressure and robust control are required
Marine/off‑shore service and FPSO where explosion protection is mandatory
General industrial manufacturing plants where automated shut‑off valves in hazardous zones are needed
Before shipment, 100% of our valves will be tested according to the standards higher than API6D.
Didtek valve is able to conduct the tests listed as follows in accordance with the internal testing procedures,
API 6D standards and/or customers’ specifications:Coating Test、Tensile Test、Dimension Test、
Low Temperature Treatment、ChemicalAnalysis、Torque Test、Helium Leakeage Test、Shock Test.
Q1: What does “explosion proof” mean in the context of the actuator?
A: It means that the pneumatic (or electric) actuator (and any solenoid valve, limit switch box, etc) is certified to meet hazardous location standards (such as ATEX, IECEx, FM, CSA) and is designed so that it cannot ignite a surrounding flammable atmosphere, and if an internal explosion occurs it will be contained.
Q2: Can this valve be used for high temperature or cryogenic service?
A: Yes — by choosing the correct body material, seat/material combination and actuator specification, the valve can be adapted for both high temperature and low (cryogenic) service. Custom designs are often provided for these extreme conditions.
Q3: What are the benefits of pneumatic actuation versus manual or electric actuation?
A: Pneumatic actuation offers fast response, less risk of electrical ignition in hazardous environments, easier integration with air supply, often lower cost and simpler design in many process installations. An actuator can be spring‑return (fail‑safe), double acting, and supports remote operation.
Q4: How do I specify the correct valve model for my process?
A: Provide the following key information: fluid medium (gas/liquid/steam), temperature range, pressure (inlet/outlet), flow rate or pipe size, end connection type, seat material requirement (soft/metal), explosion hazardous zone classification, required actuation (pneumatic double acting or spring return), any special certifications (fire‑safe, cryogenic, API6D, etc). Based on these we will recommend the correct body size, material, seat type, actuator torque rating and accessories.
Our Pneumatic Operator Explosion Proof Trunnion Ball Valve is a high‑performance quarter‑turn isolation valve that combines a robust trunnion‑mounted ball design with a pneumatic actuator equipped for explosion hazardous environments. Engineered for high pressure and harsh service, this valve offers reliable on/off control in critical piping systems where safety, longevity and automation are required.
The trunnion mounting provides secure ball anchoring (top & bottom) for reduced torque and long life, while explosion‑proof pneumatic actuation enables remote or automated operation in hazardous zones.
Trunnion‑mounted ball design: The ball is supported by upper and lower trunnions, enabling the seat rings to carry the load. This design provides low operating torque and reliable sealing under high pressure.
Explosion‑proof pneumatic actuator: The actuator is specifically certified for hazardous locations, preventing ignition and allowing safe operation in explosive atmospheres.
Robust body and materials: Available in materials such as Duplex 2205, stainless steel, carbon steel (and optionally super‑alloys) to handle high pressure, temperature extremes, corrosive media and long service life.
Fire‑safe / blow‑out proof construction: The body and internal components are designed for fire resistance and to prevent stem or shaft ejection under pressure.
Full automation interface: NAMUR or ISO 5211 mounting pads, solenoid valves, limit switches, positioners and accessories available for full remote or integrated control.
High reliability and tight shut‑off: Designed for low leakage (metal or soft seats), reduced maintenance, and long lifecycle under demanding service.
Safety in explosive atmospheres – With certified explosion‑proof pneumatic actuation, this valve is ideal for petrochemical, oil & gas, LNG, offshore, mining and other hazardous locations.
Reliability in harsh services – With fire‑safe and blow‑out proof features, the valve is built to handle demanding conditions with minimal downtime.
Upstream/mid‑stream oil & gas pipelines, onshore or offshore platforms
Petrochemical and chemical processing plants handling hazardous fluids or gases
LNG and cryogenic systems (with special low‑temperature design)
Power generation (steam, high pressure fluid systems)
Mining, metals, pulp & paper, where high pressure and robust control are required
Marine/off‑shore service and FPSO where explosion protection is mandatory
General industrial manufacturing plants where automated shut‑off valves in hazardous zones are needed
Before shipment, 100% of our valves will be tested according to the standards higher than API6D.
Didtek valve is able to conduct the tests listed as follows in accordance with the internal testing procedures,
API 6D standards and/or customers’ specifications:Coating Test、Tensile Test、Dimension Test、
Low Temperature Treatment、ChemicalAnalysis、Torque Test、Helium Leakeage Test、Shock Test.
Q1: What does “explosion proof” mean in the context of the actuator?
A: It means that the pneumatic (or electric) actuator (and any solenoid valve, limit switch box, etc) is certified to meet hazardous location standards (such as ATEX, IECEx, FM, CSA) and is designed so that it cannot ignite a surrounding flammable atmosphere, and if an internal explosion occurs it will be contained.
Q2: Can this valve be used for high temperature or cryogenic service?
A: Yes — by choosing the correct body material, seat/material combination and actuator specification, the valve can be adapted for both high temperature and low (cryogenic) service. Custom designs are often provided for these extreme conditions.
Q3: What are the benefits of pneumatic actuation versus manual or electric actuation?
A: Pneumatic actuation offers fast response, less risk of electrical ignition in hazardous environments, easier integration with air supply, often lower cost and simpler design in many process installations. An actuator can be spring‑return (fail‑safe), double acting, and supports remote operation.
Q4: How do I specify the correct valve model for my process?
A: Provide the following key information: fluid medium (gas/liquid/steam), temperature range, pressure (inlet/outlet), flow rate or pipe size, end connection type, seat material requirement (soft/metal), explosion hazardous zone classification, required actuation (pneumatic double acting or spring return), any special certifications (fire‑safe, cryogenic, API6D, etc). Based on these we will recommend the correct body size, material, seat type, actuator torque rating and accessories.
