Diaphragm valves DV-ST

This diaphragm valve is designed for use in dosing, filling, diverting and regulating duties in hygienic, high-purity and aseptic processes in the biotech and pharmaceutical industries as well as aseptic and hygienic processes in the dairy, food, beverage and brewery industries.

Benefits
• Versatile, modular and durable design
• Compact, reliable and straightforward
• Hygienic and aseptic design
• Easy installation, validation and qualification
• Standard with full Q-doc documentation meeting the demands
from high-purity applications
• Meets current Good Manufacturing Practice (cGMP) regulations

Standard design.

TheAlfaLaval Unique DV-ST UltraPure diaphragm valve has a modular design that consists of a valve body, diaphragm, and either a handle for manual operation or an actuator for pneumatic operation. It can be designed to suit any application. The actuator is standard in Stainless steel execution and available in two versions. A HighPressure version (SS/HP) and a Slim (SS/SL) version for std. duties. Both versions are available in either Normally Closed (NC), Normally Open (NO) or an Air/Air (A/A) activated solution. Futhermore also ATEX compliant and autoclaveable. The DV-ST UltraPure diaphragm valve can be fitted with sensing and control units from an extensive range. Options include control units that suit AS-Interface, IO-Link and digital operating platforms. The diaphragms are available as soft elastomer (EPDM) as well as hard elastomers (PTFE/EPDM and TFM/EPDM). Alfa Laval DV-ST UltraPure valve bodies are available in cast, forged, and block options to suit the most demanding applications. A choice of surface finishes and connection types are also available. For critical applications with corrosive media, special alloys such as Hastelloy, duplex, and AL-6XN materials in block design are available upon request.

Working principle

The Alfa Laval Unique DV-ST UltraPure Diaphragm Valve has two modes of operation: manual operation by means of a handle and pneumatic operation by means of a pneumatic actuator. For manual operation, a simple turn of thehandlelifts thecompressor upwards, moving the diaphragm away from the weir of the valve body thereby opening the valve. Turning the handle in the opposite direction pushes the compressor downwards onto the diaphragm, pressing the diaphragm against the weir of the valve body, thereby closing the valve. For pneumatic operation, the pneumatic actuator controls the axial movement of a piston, thereby opening or closing the valve depending on the actuator function.

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-waybody
• T-body (Zero dead-leg design)
• Tankoutletbody
• Tandem body / IAV solutions
• Multi-port body
Configurator available.

Sensing and control units:
A wide range of sensing and control units are available for actuators consisting of:
• Controls unit
• Indication units
• ATEX units
• Stroke limiters - Only for SS/SL Slim actuators
.
Unique DV-ST SS/HP HighPressure version actuator DN8-15 (1/4"-1/2")
Adapter for mounting of ThinkTop V50, ThinkTop Basic, ThinkTop D30 and IndiTop - see automation accessories
.
Unique DV-ST SS/SL Slim version actuator
All sizes require adaptor for mounting of Sensing & Control solutions - see automation accessories