Product Description
The DN500 PN40 Three-Piece Trunnion Ball Valve with Spring Return Pneumatic Actuator is engineered for heavy-duty industrial fluid systems. With a robust three-piece design and trunnion-mounted ball, it offers reliable high-pressure sealing and minimal operating torque. The spring return pneumatic actuator ensures automatic fail-safe positioning, enhancing safety and efficiency in chemical, oil & gas, water treatment, and industrial automation pipelines.

Product Features

Three-Piece Trunnion Design: Easy maintenance without removing the entire valve from the pipeline.

Spring Return Pneumatic Actuator: Provides fail-safe return in case of air or power failure.

PN40 Pressure Rating: Suitable for medium-high pressure industrial applications.

High-Capacity Flow: Trunnion-mounted ball reduces torque, improves efficiency.

Flanged End Connections: Simplifies installation and alignment in large pipelines.

Materials & Construction

Valve Body: Carbon steel or stainless steel (ASTM A216 WCB / CF8M optional)

Ball: Precision-machined stainless steel trunnion-mounted ball

Seat: PTFE / Reinforced PTFE / Metal seat options

Stem: Anti-blowout stainless steel stem

Gaskets: Graphite / PTFE depending on application

Actuator: Spring return pneumatic actuator, ISO 5211 interface

Size & Dimensions

Nominal Diameter: DN500

Pressure Rating: PN40

End Connection: Flanged, EN 1092-1 / ASME B16.5

Face-to-Face: ISO 5752 / ASME B16.10

Actuator & Control Options

Actuator Type: Pneumatic spring return

Operation: On/Off, fail-safe return

Air Supply: Standard 4–6 bar

Manual Override: Available

Mounting: ISO 5211 compatible

Design & Testing Standards

Design & Manufacture: API 6D, ASME B16.34

Face-to-Face: ISO 5752 / ASME B16.10

Flange Connection: EN 1092-1 / ASME B16.5

Pressure & Leakage Testing: API 598

Typical Applications

Chemical Plants – automated flow control and safety shutdown

Oil & Gas Pipelines – high-pressure media handling

Water Treatment Systems – efficient distribution and control

Industrial Automation – PLC / DCS integrated processes

Power Plants – high-pressure fluid control

Product Introduction
The DN500 PN40 Three-Piece Trunnion Ball Valve with Spring Return Pneumatic Actuator is designed to provide long-term reliability and efficiency in demanding industrial environments. Its three-piece design enables easy maintenance, while the trunnion-mounted ball ensures low torque operation. Integrated with a spring return pneumatic actuator, the valve offers automatic fail-safe functionality, enhancing safety in critical process lines. Its versatility and durability make it ideal for chemical, water treatment, oil & gas, and industrial automation applications.