General Features Trunnion Ball Valves

Due to the wide range of applications for ball valves, the industry has developed various options to address specific operational needs.
CAM Valves Sales and Engineering departments are available to discuss with customers which options should be selected in accordance with the operating conditions of the purchased valves.
Below, we present the most common options.
General Features - Trunnion Ball Valves

EASY MAINTENANCE

CAM ball valves feature a simple, user-friendly design that allows for quick and easy parts replacement, requiring minimal plant shutdown.

SEALANT INJECTION

CAM valves can be supplied, upon request, with sealant injection on the seat and stem sealing areas.


FLOW CAPACITY

Full-port ball valves are ideal for pigging operations and provide maximum flow capacity. The design ensures high-performance flow in both liquid and gas services, regardless of the media type.

STEM EXTENSION

STEM EXTENSION

Stem extensions are provided to position the stem sealing area away from extreme temperatures, ensuring reliable sealing performance. They also allow easier valve operation in insulated or hard-to-reach installations.


FIRE SAFE DESIGN

CAM ball valves feature a fire-safe design compliant with API 607. If non-metallic seats are damaged by fire, the upstream seat is forced against the ball, sealing the line and preventing internal leakage. Fire-safe gaskets on all static and dynamic seals ensure external leak prevention, providing reliable performance under extreme conditions.

ANTI-BLOW OUT STEM

ANTI-BLOW OUT STEM

The anti-blowout stem design guarantees that the stem remains securely in place, even during maintenance under pressure, providing maximum safety and operational reliability.


VENT AND DRAIN

VENT AND DRAIN

This feature is provided according to API 6D.

LOW TORQUE

Optimized seat design, stem bearings and sealing arrangements work together to reduce operating torque, making CAM valves easy to operate while maintaining reliable sealing performance.


TRIPLE STEM SEALING

TRIPLE STEM SEALING

The triple stem sealing design combines dual O-ring barriers with a graphite third barrier, providing maximum reliability, leak prevention and durability. Customized sealing solutions are available for specialized applications.

ANTISTATIC DESIGN

ANTISTATIC DESIGN

CAM valves feature an antistatic design that safely dissipates any static charge by connecting the body, ball and stem via coil springs. This ensures safe operation even in sensitive or hazardous environments.


PNEUMATIC OR ELECTRIC ACTUATOR

PNEUMATIC OR ELECTRIC ACTUATOR

GEAR OPERATOR

GEAR OPERATOR

LOCKING DEVICE

LOCKING DEVICE

Optional locking facilities are available to secure the valve in the desired position, preventing accidental operation and enhancing overall safety.

PRIMARY AND SECONDARY BODY GASKET

PRIMARY AND SECONDARY BODY GASKET

CAM valves feature dual fire-safe sealing barriers: a soft O-ring primary seal and a secondary graphite or spiral-wound seal. This combination ensures reliable sealing under extreme conditions, with options for customized solutions to match your operational needs.


SEAT-BALL ALIGNMENT

The mechanical stop ensures perfect seat-to-ball alignment, providing smooth operation, optimal sealing and maximum reliability throughout the valve’s service life.

LIFTING LUGS AND SUPPORT LEG

For safe handling and secure installation, CAM valves feature lifting lugs for heavy valves and supporting feet for 6” and larger trunnion valves. Custom configurations are available to meet specific customer requirements.


ISO FLANGE

ISO 5211 top mounting on all valves.

SINGLE PISTON EFFECT (self relieving seat)

SINGLE PISTON EFFECT (self relieving seat)

Each CAM trunnion ball valve seat features a single piston effect, where line pressure enhances the seat’s contact with the ball for optimal sealing. The self-relieving design automatically vents excess cavity pressure, ensuring safe operation and long-lasting valve performance.


DOUBLE PISTON EFFECT (optional)

DOUBLE PISTON EFFECT (optional)

For enhanced sealing performance, CAM valves can be fitted with a double piston effect (DPE) seat. The recommended setup features a DPE seat downstream and a self-relieving seat (SPE) upstream, combining a double sealing barrier with automatic cavity pressure relief for safe and reliable operation in demanding applications.

 

Seat seal may be designed to provide additional sealing capability: the cavity pressure enhances the contact pressure between seat and ball, as the differential area A=B-C creates a piston effect forcing the seat on the ball.