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Alfa Laval Unique DV-ST UltraPure

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Simply Unique Diaphragm Valves

Unique DV-ST UltraPure

Application
dia 1Alfa Laval Unique diaphragm valves offer a complete range covering every need, for use in sterile and ultra-hygienic processes. The Unique diaphragm valves consist of a wide variety of valve bodies, diaphragms, actuators, handles, automation and control units.
 
Standard Design
With a modular design nearly all possible configurations are feasible.
The valve is composed of:
. Valve body
. Diaphragm
. Handle or actuator
. Automation and control units
 
Documentation
All UltraPure valves are delivered with our comprehensive Q-Doc documentation package including:
. 3.1/ MTR traceability certificate corresponding to EN 10204
. FDA - Declaration of conformity to FDA (CFR 21: 177.2600 or 177.1550)
. USP - Certificate of conformity to USP Class VI (Chapter 88, biological reactivity test)
. TSE/ADI Declaration (Transmissible Spongiform Encephalopathy/Animal Derived Ingredients)
. Surface finish conformity declaration
The following documentation is available upon request:
. Surface finish certificate (Ra test results)
. ATEX certificate
 
Valve Body Design
The valve bodies are available in a wide variety of valve types and configuration options (dimension standards, connections, surface finish and material).
. 2-way valves
. T-valves
. Tank outlet valves
. Tandem valves
. Multiport valves
 
Material and surface finish:
2-way valves are available in forged or cast material. T-valves, tank outlet valves and tandem valves are available in forged or block material. Multiport valves are made from block material.
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Modular design
With a modular design nearly all possible configurations are feasible.
The valve is composed of:
 
. Valve body
. Diaphragm
. Handle or actuator
. Automation and control units
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Dimensions 2-way valve bodies:
Outline dimensions 2-way valve bodies

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Other sizes and connections available on request.
 
Drain angle x :
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Other body combinations

T-valve body:
Alfa Laval also offers T-valve bodies where the weir of the T-valve is as close as possible to the internal contour of the main tube and thereby minimized dead leg.
 
The T-valves are available as machined from block or from forged material (shown in picture).
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Tank outlet valve body:
Alfa Laval also offers compact tank outlet valves with minimized dead leg and complete drainability. The tank outlet valves are available as machined from block or from forged material (shown in picture) and is available both as tank bottom valve and tank wall valve.
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Forged as standard, Machined from block on request.
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Tandem valve body:
The tandem valves are available in a wide variety of angles and positions. Tandem valves are available as machined from block or from forged material (shown in picture).
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Multi port valve body:
Multi port valves are a space and time saving alternative to valve clusters. Alfa Laval offers customized solutions for both simple and complex processes.
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Diaphragm Design:
The diaphragms are available in soft elastomers (EPDM, FPM and Silicone) as well as hard elastomers (PTFE and TFM).
 
The hard elastomers are supported by a soft elastomer (EPDM or FPM). The 2-piece design allows the two elastomers to work independently from each other and thereby reducing tensions caused by different thermic properties.
Diaphragms are available with 3 different kinds of connections: threaded pin, bayonet and button connection.
. Threaded connections are used on all soft elastomers ≥ DN 25 (1")
. Bayonet connections are used on all hard elastomer ≥ DN 15 (1/2")
. Button connections are used on all small sizes.
 
Material selection:
Each application has different working conditions and therefore different demands on the diaphragm. In order to select the most suitable diaphragm for your application, following factors should be considered:
. Working pressure
. Application temperatures
. Process fluids (product, cleaning liquid, sterilization, passivation, etc.)
 
Soft elastomers (EPDM, FPM and Silicon) are suitable for most applications also for high working temperatures. A typical feature of soft elastomer diaphragms is the suitability for mechanical polluted media. EPDM is in addition suitable for continuous steam application, while FPM is not recommended for use in steam applications.
 
Hard elastomers offer the highest possible degree of chemical resistance. Our TFM (PFTE grade) elastomer is a more flexible material and have some of the soft elastomer features including for example low creep.
 
Diaphragm properties:
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FDA - Declaration of conformity to FDA (CFR 21: 177.2600 or 177.1550)
USP - Certificate of conformity to USP Class VI (chapter 88, biological reactivity test)
TSE/ADI Declaration (Transmissible Spongiform Encephalopathy /Animal Derived Ingredients)
 
Pressure - Temperature recommendations:
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1) Actuator DN65/80 only
2) All other actuators and handles except C/C handle
 
Handle and actuator options:
The diaphragm valves can be operated by a handle or a pneumatic actuator. Alfa Laval offers 4 different kinds of a manual handles and 3 different kinds of pneumatic actuators. The special design of the actuators allows quick conversion of control function (NC to Air/Air to NO) and permits adjustment of spring pressure to optimize the sealing life time.
The handles and actuators are available in different materials: Stainless Steel (SS), Composite (C) and Epoxy and with various features and options.
 
Actuators
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Handles
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Automation and control units:
 
A wide range of automation and control units are available for actuators consisting of:
. Controls unit
. Indication units
. Electrical ATEX units
. Stroke limiters
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Ordering
The valves are sold as complete valves and the item numbers for the standard program are included in the ordering leaflets.
For other configurations please specify:
- Port size
- Body configuration
- Tube standard
- Connection
- Surface finish
- Stainless steel quality
- Diaphragm Type
- Handle or actuator Type
- Additional including hash marks, leakage detection etc.
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