Unique DV-ST UltraPure
Alfa Laval Unique DV-ST UltraPure diaphragm valves are the natural choice for pharma and biotech industries as well as other hygiene-focused processes. The compact and lightweight valves comprise a series of base parts including valve bodies, diaphragms, actuators and handles. The choice gives you a multitude of configurations to meet the exact needs of your process.
High-quality valve bodies, proven diaphragms, reliable actuators
- Compact, lightweight, hygienic design – high-grade valve bodies and low Ra surface finishes
- Reduced risk of contamination – fully documented, made for aseptic operation with standard low-ferrite valve body (optional high alloy valve body)
- Reliable, long-life diaphragm – available in high performance EPDM for continuous steam operation at temperatures up to 150°C
- Flexible, fits-all stainless steel actuators available in slim and high pressure versions, backed by a five-year warranty
- Easy installation, validation and qualification backed by Alfa Laval Q-doc comprehensive documentation package and service partner network
The Unique DV-ST UltraPure is available for pneumatic operation or for manual operation. For pneumatic operation, the valves are controlled by actuators that operate at product pressures of up to 10 bar, depending on the valve size, diaphragm material (EPDM, PTFE/EPDM and TFM/PTFE) and actuator selected. There is also a range of easy-to-mount indication and control units from which to choose.
For manual operation, the valves are controlled manually by turning a handle attached to the stem. The handle features standard over-closure protection to help prolong diaphragm life. All steel parts are made of stainless steel or composite material, depending on the handle type.
Long-lasting valve service life
A maintenance-free stainless-steel actuator with an autoclavable design, provides high corrosion resistance. This guarantees trouble-free operation and a long-lasting service life.
Actuators for tight spaces and high pressure
All-stainless steel actuators for the Alfa Laval Unique DV-ST UltraPure are available in two types; for standard and high-pressure duties. Both are available as standard ATEX-certified actuators, in normally closed (NC), normally open (NO), or air/air activated (A/A) versions.
- The Alfa Laval Unique DV-ST UltraPure Slim (SS/SL) has the standard actuator which handles normal product pressures up to 10 bar (∆=100%), depending on the valve size and diaphragm material. Slim and compact, this version minimizes dead leg between the valves and facilitates easy installation of the correct drain angle – even when space is tight. The SS/SL actuator also comes with an optional stroke limiter for flow control.
- The Alfa Laval Unique DV-ST UltraPure High Pressure (SS/HP) has an actuator that handles high product pressures up to 10 bar (∆=0%), depending on the diaphragm material. This SS/HP version ensures safe, robust operation in systems with high pressures.
Unique DV-ST UltraPure valve technology
Premium as standard, the Unique DV-ST has valve bodies with low delta-ferrite content and defined sulphur content in all forged and block valves. Two-way valves, including the ferrules for clamp-end bodies, are forged from a single block. T- and tank-outlet valves are available machined from a single block. The valves are available in various configurations and materials.
Built around a weir-type design, the aseptic diaphragm valves are available with hard or soft compounds from PTFE with EPDM as the backing to a pure EPDM diaphragm. The valve can be operated manually or with pneumatic actuators that come with a range of sensing and control equipment, including control units, position indicators, stroke limiters and valve positioners.
All diaphragms have cure dates and compound tracking available, meet FDA/USP classifications and are TSE/ADI-compliant.
Service and reliability
The valves come with Alfa Laval Q-doc, a comprehensive documentation package that provides full transparency of the entire supply chain. This helps smooth purchasing and installation procedures and facilitates qualification, validation and change control procedures. Based on GDP, Q-doc covers every aspect of biotech and pharmaceutical equipment supply and provides customers with transparent and well-documented quality assurance of the sourced equipment.
Unique design adds value
We have used Unique DV-ST UltraPure valves for a long time, so we know that they are highly reliable and that the membranes are long-lasting.
Horst Neuland, Chief Plant Engineer at Bayer HealthCare in Wuppertal, Germany
Brochure: Alfa Laval Unique DV-ST UltraPure Diaphragm Valves
With its modular design and enhanced compatibility, Alfa Laval Unique DV-ST UltraPure is constructed from a series of base parts that enables you to easily adapt the valve to a wide range of applications.
How it works
The standard Unique DV-ST UltraPure consists of a valve body, diaphragm, handle or actuator. In the manual version, a simple turn of the handle pushes the compressor down on the diaphragm, pressing it against the weir of the valve body and closing the valve. You can also use a pneumatic actuator to control the valve. The actuator controls the piston’s axial movement, opening or closing the valve depending on the actuator function. The standard all-stainless-steel actuators are available in two versions: the Unique DV-ST UltraPure Slim (SL) for standard duties and the Unique DV-ST UltraPure High Pressure (HP) for more demanding pressures. Both are available as normally closed (NC), normally open (NO), or air/air activated (A/A) valves as well as in ATEX versions for use in potentially explosive atmospheres.
Ten top tips - Valves
Here are some tips and service videos to show how you keep your hygienic valves in tip top condition
Alfa Laval's hygienic equipment product catalogue "Close at hand" includes product leaflets, performance curves, links to animations, brochures and price lists for ordering purposes.
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Download the product models in Neutral or Native CAD file formats. It is also possible to download 3D PDF files.
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