VARIVENT® Modulating Control Valves - with the highest hygienic standards

Product catalog summary

Overview
VARIVENT® Modulating Control Valves, Series A and S, are designed for pressure control, rating, or mixing of liquids at varying temperatures. Common applications include gassing, yeast pitching, wort aeration, and filling operations. These valves are equipped with special positioners for precise stroke length adjustments and can be optimized for different processes with multiple kvs-values per nominal width.

Design and Features
The valves feature linear or equal percentage control cones within fully cleanable, pocket-free VARIVENT® housings. Control cones and valve seats are interchangeable to suit different operating conditions. The open lantern design allows for visual inspection of stem seal leaks. The valves are constructed with clamp fittings for easy assembly and are suitable for wet room installations. Actuators are reversible, supporting both spring-to-open and spring-to-close operations.

Special Features

Positive shut-off with a V-ring seat seal made of EPDM or Viton.
Electro-pneumatic or pneumatic positioners for enhanced control accuracy.
Limit switches to detect open and/or closed valve positions.

Actuator Types
A series control valves come with a stainless steel multi-spring diaphragm actuator, while S series valves feature a plastic laminated pressed steel sheet diaphragm actuator, not available for shuttle or 3-stage valves.

Connection Fittings

Welded sockets
VARIVENT® flange and clamp connections
VARIVENT® IDF union
Fittings as per DIN 11851
Flanges as per DIN and ANSI
IDF male parts

Sizes
Available housing sizes and connection diameters include DIN 11850 (DN 25 to DN 125), Inch OD (1" to 4"), and Inch IPS Sch. 5 (2" to 6").

System Integration
The control valve is part of the VARIVENT® System, known for being made of stainless steel, fully cleanable, sterilizable, robust, easy to maintain, and suitable for all hygienic duties.

Valve Types

AL and SL: Single-seat modulating control valves
AWW: Flow blending control valve with symmetric or asymmetric trim
AWX: Flow distribution control valve with symmetric or asymmetric trim
3-stage seat valve: Used for reducing high pressure differences in cavitation-free applications at low noise levels.

Catalog excerpts

VARIVENT® Modulating Control Valves - with the highest hygienic standards -1

Tuchenhagen Process EquipmentDivision VARIVENT > Modulating Control Valves > with the highest hygienic standards size="-3">

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VARIVENT® Modulating Control Valves - with the highest hygienic standards -2

Design Linear or equal percentage control cones are integrated in fully cleanable, pocket-free VARIVENT Special Features > housings.Control cones and valve seats are easily changed for different operating conditions. The open lantern allows visual inspection for stem seal leaks. Valve constructions using clamp fittings allow easy and rapid assembly. Modulating control valves, series Aand S, are suitable for wet room installation.Actuators are reversible allow-ing either spring-to-open orspring-to-close operations. ΕPositive shut-off by use of a V-ring seat seal made ofEPDM or Viton.Electro-pneumatic...

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VARIVENT® Modulating Control Valves - with the highest hygienic standards -4

Valve with 3-stage seat Used to reduce high pressure differences in cavitation free applica- tions at low noise level. Valve type AWX Flow distribution control valve with symmetric or asymmetric trim Valve type AWW Flow blending control valve with symmetric or asymmetric trim Valve types AL and SL Single-seat modulating control valve > Mix Matched Housings Modular valve housings are available in different line size combinations; the lower housing must always have the larger nominal width. They are typically used for blending ingredient streams into a main product flow line. > Process EquipmentDivision...

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