D-tec® Direct Valves
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D-tec® Direct Valves

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Main Components

Housing
The height of the dead-space-free housing exactly corresponds to the diameter of the connection pipeline and therewith avoids domes and sumps. Numerous housing combinations are available with either clamped or welded seats.

Internal Assembly
The hermetically sealing D-tec® stem diaphragm is the key element of a D-tec® valve. It is characterized by a very long service life, high dimensional stability with temperature resilience and cleanability. D-tec® shut-off valves can be equipped with a soft-sealing (i.e. EPDM) or a hard-sealing (TEFASEP® gold) valve seat seal.

Actuator
The actuator size, which is chosen based on process and installation requirements, contributes to low air and energy consumption. Depending on the valve operation, various actuator options are available and the valve can be ideally adapted to customer requirements. The actuator includes an interface to mount a T.VIS® control top onto the valve and the internal air supply reduces the risk of failures with external hoses.

Lantern
The lantern connects actuator and product-wetted parts and simultaneously prevents the system from heat transfer between these two valve sections. The lantern has an important supporting and clamping function for the D-tec® stem diaphragm and is furthermore designed for a safe and easy visual detection of leakages.

Control & Feedback System
D-tec® divert valves can be equipped with T.VIS® control tops M-15 and A-15. They enable seamless integration of the valves into an automated processing plant.

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Description

UltraClean Applications
  • Brewery industry – Beer and mixed beer beverages (e.g. pure yeast cultivation and connection of sterile tanks and filling machines after sterilization)
  • Beverage industry – Water-based mixed beverages (e.g. soft drinks, fruit juice and fruit-based beverages, concentrates, beverages with pulp)
  • Dairy industry – Milk-based and lactic acid-fermented products (e.g. ESL milk, dessert products, crystallizing products such as lactose)
  • Food and beverage industry – Sauces and delicacies (e.g. manufacture of basic fruit ingredients, incl. particulates such as nuts)
D-tec® Direct Valves at a Glance
  • Hermetic sealing by stem diaphragm – ideal for UltraClean applications
  • Innovative connection between valve stem and diaphragm minimizes mechanical stress at the diaphragm during switching operations
  • Integrated rotary disconnection of valve insert and actuator
  • High operational safety due to reliable leakage detection in the event of a ruptured diaphragm
  • Maintenance-friendly design enables reduced plant downtimes
  • Modular principle allows simple conversion, e.g. from hard- to soft-sealing
  • Reduced air wiring effort due to internal air supply
  • Based on proven VARIVENT® philosophy

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