Housing
VESTA® valve blocks are available with three (type HWA) or four (type HXA) connection ports by default. With the type HXA the intermediate chamber is executed for media transfer. The single-piece housing includes three sections and is produced from one solid piece. Further housing configurations are available upon request.
Internal Assembly
The PTFE bellows are identical with those for VESTA® shut-off valves. Bellows up to DN25, OD 1″ and ISO 33,7 include a tapered tip. All other valve dimensions include a regular flat seat area.
Actuator
Both actuators can be executed pneumatically or manually. The manual version is made of plastic in all cases. Pneumatic actuators are available in plastic or stainless steel, and the fail-safe (normally close or normally open) position can be easily reversed. Differential configurations of the two actuators are possible.
Control & Feedback System
Pneumatic actuators include a visual valve status indicator by default. Alternatively, visual indicators can be replaced by an open feedback unit or by using the adequate adaptor plate with a T.VIS® control and feedback system in various executions.
