GEA Tuchenhagen Double-Chamber Valves DK
Aseptic double-chamber valves are flow control devices for aseptic processing plants. The valve enables the total separation of antagonistic media and offers you maximum process safety.
The integrated steam barrier (ISB) enables the safe separation of both product lines via the two seat seals. The integrated function of the single-seat lifting capability permits fully automatic seat cleaning during production. The number of seals and moving parts are reduced to a minimum to provide easy maintenance and low Total Cost of Ownership.
Product Description
General
GEA places great value in designing existing components and new product developments according to EHEDG and 3A standards. All product wetted parts from stainless steel are seamlessly traceable. The gaskets in contact with food are FDA compliant.
Main components
Housing
Housings for double chamber valves are available with two, three or four port connections. The valves are produced with standard butt-weld connections by default. Mixed port connection sizes can be delivered upon request as well as various aseptic pipe connections.
Internal Assembly
The upper seat of the internal assembly contains a shrunk valve seat seal made of Tefasep® (optionally PTFE). The lower valve seat seal is available with a shrunk or screwed valve seat seal. In addition to the standard sealant Tefasep®, other sealing materials such as PTFE, EPDM, Viton®, etc., are also available for the lower seat. The nominal diameter of the valve is determined by the larger valve seat (upper seat seal “B” above).
Actuator
The standard version of the pneumatic actuator is designed as spring-closing / air-opening (NC). Available actuator options include: a drive without single-seat lifting (1 valve stroke), one with the seat-lifting of the bottom valve seat (seat A) and full stroke (2 valve strokes), and finally one with single-seat lifting of both valve seats (seats A+B) and valve full stroke (3 valve strokes).
Clamp
Due to its solid construction, the GEA clamp enables a pressure stable and safe connection of the main components. The special design with three segments allows a service-friendly handling of the component, even under tight space conditions.
Side valves
The sterile chamber includes a steam inlet and a drain valve by default. Both valves can be either equipped with normally closed (NC) or normally open actuators (NO), depending on customer specifications. Furthermore, the drain valve is available with an integrated temperature probe which enables temperature measuring in the sterile chamber.
Feedback units
Aseptic double chamber valves can be either equipped with open feedback units or T.VIS® feedback systems by default. Feedback units from third party suppliers can be mounted via specially designed adaptors.
Technical Data
Higher closing pressures, other materials, higher surface qualities and higher operating temperatures are available upon request.