Pneumatic Single Acting Ball Valve

 

Quarter-Turn Operation: A pneumatic actuator rotates the ball 90 degrees to open or close the flow passage for automated isolation.
Spring-Return Design: Compressed air drives one stroke, while the internal spring provides the return stroke when actuator air pressure is lost.
Selectable Fail Position: Available configurations can include Fail-Close (FC) or Fail-Open (FO), depending on the actuator and valve assembly.

 

 

Fail-Safe Action: FC configurations return the valve to the closed position; FO configurations return it to the open position when actuator air is lost.

Actuator Torque Matching: Sizing considers valve operating torque, maximum differential pressure, minimum air supply pressure, and spring-return torque.

Material and Seat Options: Body, ball, stem, seats, and seals are selected according to fluid compatibility, pressure, and operating temperature.

Pneumatic Accessories: Optional solenoid valves, limit switch boxes, position indicators, and air filter regulators support automated control and position feedback.

 

 

Parameter	Specification / Options
Product Type	Pneumatic single acting ball valve
Actuator Type	Spring-return rack-and-pinion or scotch-yoke, subject to model availability
Operating Principle	Pneumatic drive with spring return
Fail Position	Fail-Close (FC) / Fail-Open (FO)
Nominal Size	Confirm by valve model
Body Material	Stainless steel, carbon steel, or other available grades
Ball and Stem	Stainless steel or other compatible materials
Seat Materials	PTFE, RPTFE, PEEK, or other model-dependent options
Pressure Rating	Confirm by valve design and pressure class
Operating Temperature	Depends on body, seat, seals, and actuator configuration
End Connections	Flanged, threaded, welded, or other available options
Air Supply Pressure	Confirm against the selected actuator specifications
Control Accessories	Solenoid valve, limit switch box, position indicator, filter regulator
Testing	Applicable shell, seat leakage, and functional tests as specified
Documentation	Dimensional drawings, material certificates, and inspection reports as agreed

 

 

Water Treatment: Automated isolation in water supply, filtration, and treatment systems, subject to fluid compatibility.
Chemical Processing: On-off control for compatible process media after evaluating corrosion, pressure, and temperature.
OEM Equipment and Skids: Pneumatic valve assemblies for automated machinery and industrial process packages.
Tank and Transfer Systems: Automated isolation where a defined valve position is required following loss of actuator air.
Key Selection Checks

• Process Conditions: Specify fluid composition, operating temperature, line pressure, and maximum differential pressure.
• Fail Position: Determine whether the valve must open or close when pneumatic pressure is lost.
• Air Supply: Provide the minimum available air pressure for actuator sizing.
• Installation Interface: Confirm valve mounting dimensions, actuator compatibility, control voltage, and accessory enclosure requirements.

 

 

Assembly Verification: Check valve-actuator compatibility, mounting alignment, coupling engagement, and travel-stop settings according to the applicable procedure.

Functional Testing: Verify opening and closing action and the specified fail position.

Pressure and Leakage Testing: Perform the agreed tests against the applicable valve standard and acceptance criteria.

Material Traceability: Material certificates and inspection records can be supplied according to the agreed order requirements.

 

 

Valve Configuration: Specify size, body material, seat material, pressure rating, and end connection.

Actuator Requirements: State the required fail position, minimum air pressure, operating frequency, and maximum differential pressure.

Control Accessories: Identify solenoid voltage, control signal, position feedback, enclosure rating, and hazardous-area requirements.

Quality and Delivery: Confirm applicable standards, inspection scope, material documentation, order quantity, and target delivery date.

 

 

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