Pneumatic Ball Valve Throttling Guide
Technical specifications for flow control applications
1Design Prerequisites
Jamesbury V-port valves provide near-linear flow characteristics with variable orifice
2Flow Characteristics
Cavitation risks require trunnion-mounted designs with multi-stage trims
3Actuator Requirements
Rotork GP piston actuators recommended for sustained modulation
4Applications
Chemical processing: PTFE seats handle sulfuric acid in batch reactors
HVAC: 1/2"-2" valves with spring-return actuators for temperature control
5Limitations
Non-linear flow below 20% opening - consider segment/globe valves
Abrasive media requires tungsten carbide seats or pinch valves
Implementation Guidance
V-port designs with precision positioners recommended for most throttling applications
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