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Ball Valve • Industrial Flow Control

Pneumatic Actuated 3 Piece Design Ball Valve

Ball Valve

Pneumatic Actuated 3 Piece Design Ball Valve

Allied Engineering Three piece design Ball valves can be operated by the pneumatic actuator, on-off type, with limit switch / with solenoid valves as per customer requirements. Ball Valves are available made from bar stocks sand cast, investment casting in various materials, like SS 304, SS 304L, SS 316, SS 316L, IC CF8, IC CF8M, IC CF3, and ICCF3M. Sizes -1/4″ to 6″(6 NB TO 150 NB). We manufacture valves from genuine guaranteed raw material with material test certificates, hydraulic test certificates, and Mill TC 3.1.b available with all supplies. Also, we can provide valves with third-party inspection agencies.

Size Range 6 NB TO 100 NB (1/4″ TO 4″ )
Pressure Rating Max 425 PSIG
Design Standard GENERALLY CONFORMING TO BS 5351,API 602

Technical Specifications & Metallurgy

Certified Standards
Allied THREE PC DESIGN BALL VALVE Flanged END
BODYBAR STOCKS STAINLESS STEELS AND INVESTMENT CASTING IC CF8- 304/IC CF8M -SS 316 /IC CF3- SS 304L/IC CF3M- SS 316L
BALLAISI 304/SS 316 / SS 304L/SS 316L
STEMAISI 304/SS 316 / SS 304L/SS 316L
SEAT&SEALPTFE /RPTFE/GLASS FILLED PTFE/CFT
MFG STDGENERALLY CONFORMING TO BS 5351,API 602
TESTINGBS 6755
LEVERS.S. WITH PVC SLEEVE
ENDSSCREWED TO BSP –F , NPT –F , MALE-FEMALE
HYD TEST PRESSUREBODY:425 PSIG(30KG/CM2) SEAT:300 PSIG (21 KG/CM2)
SIZE RANGE6 NB TO 100 NB (1/4″ TO 4″ )

What is a Pneumatic Actuated 3 Piece Design Ball Valve?

A Pneumatic Actuated 3 Piece Design Ball Valve is a three-piece body ball valve fitted with a pneumatic actuator for automated, remote-controlled operation. The three-piece body allows the center section to be removed for easy maintenance without disturbing the end connections in the pipeline. Available made from bar stock, sand casting, or investment casting in materials like cast iron, cast steel, MS, SS 304, SS 316, and SS 316L, built to ASME B16.5 flanged or screwed-end standards. Available in sizes 15mm to 300mm with spring return or double-acting actuator options. Explore our Ball Valve range or compare with our Handle 2 Piece Design Ball Valve .

Key Features of Pneumatic Actuated 3 Piece Design Ball Valve

  • Three-piece body design for easy in-line maintenance
  • Pneumatic actuator: spring return (single-acting) or double-acting
  • Body: Cast Iron, Cast Steel, MS, SS 304, SS 316, SS 316L
  • Ball & stem: AISI/SS 410, 304, 316, 304L, or 316L
  • Seat & seal: PTFE, RPTFE, GFT, Teflon, Viton, or Metal-to-Metal
  • Manufactured to BS 5351, tested to BS 6755
  • End connection: Flanged to ASME B16.5 FF/RF (150#) or screwed
  • Hydrostatic test pressure: Body 425 PSIG, Seat 300 PSIG
  • Operation: Pneumatic actuator (with optional limit switch/solenoid)
  • Size range: 15mm to 300mm

Applications of Pneumatic Actuated 3 Piece Design Ball Valve

Suited for automated process lines requiring fast, repeatable on-off control, remote or PLC-based operation, and applications where manual operation is impractical, such as batching systems, automated skids, and continuous process plants.

Benefits of Pneumatic Actuated 3 Piece Design Ball Valve

  • Enables remote, automated operation without manual intervention
  • Three-piece body simplifies maintenance without removing end pipework
  • Fast actuation improves process response time and consistency
  • Wide material range suits varied process conditions and budgets
  • Multiple seat and seal choices allow chemical compatibility
  • Compatible with limit switches and solenoid valves for full automation

Working of Pneumatic Actuated 3 Piece Design Ball Valve

Compressed air supplied to the pneumatic actuator drives a rack-and-pinion or scotch-yoke mechanism, which rotates the ball 90 degrees within the valve body. In the open position, the ball’s bore aligns with the pipe for unrestricted flow. When air signal is removed or reversed, the actuator rotates the ball a quarter-turn to block the flow path. In spring-return actuators, the valve automatically returns to a fail-safe position (open or closed) if air supply is lost, while double-acting actuators require air pressure to move in both directions. The three-piece body can be separated by removing the center section for quick access to the ball, seats, and seals.

Why Choose Allied Engineering?

Allied Engineering manufactures Pneumatic Actuated 3 Piece Design Ball Valves with a wide choice of materials, actuator configurations, and manufacturing methods, ensuring reliable automated performance across industrial applications. With BS 5351 compliance, robust actuator integration, and years of industry experience, we deliver valves built for dependable, long-term automated operation.

Explore our Ball Valve Range, or Get a Quote today.

Custom Engineering & Sizing

Need a Custom Port, High-Temp Trim, or Third-Party Inspection?

Our technical valve engineers provide 3D CAD drawings, material test certificates (EN 10204 3.1), and rapid fabrication quotes for project requirements.

Request Project RFQ
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