VESTA® block valves are compact sterile valves that can be used universally with two independent actuators of each other. The design concept of a single piece body allowing the merging, separation or branching of various media flows in the smallest of spaces.
VESTA® block valves offer an optimal flow path with reduction of dead spaces at the same time. The significantly reduced pipework volume and the improved self-draining are outstanding features of the design. A variety of configurations provide a high measure of flexibility in the implementation of plant designs with significant cost reduction.
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.
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.
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 and feedback systems
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.