Spring-Return Ball Valve

Service conditions

A ball valve opens or closes the pipeline by rotating a ported ball. Port geometry, seats and stem sealing determine its operating performance. Selection should consider differential pressure, fluid cleanliness and cycling duty together.

A spring-return arrangement uses stored mechanical energy to restore a defined position when operating input is released. Specify return direction, spring torque, operating resistance and response requirements and consider changing differential pressure.

Configuration

Select the manual operator or actuator to suit the valve torque or thrust requirements and site operating conditions. Provide access and clearance for manual operation. For frequent cycling or remote operation, assess actuator output, duty cycle and valve-position feedback.

Service conditions

Specify the process-fluid composition and steady-state, startup and shutdown conditions, then evaluate the body, wetted internals and sealing materials together. Solids, deposits and cleaning procedures can affect sealing surfaces and operating mechanisms. Base the maintenance plan on the actual service conditions.