Unique SSV Reverse Acting

The Alfa Laval Unique SSV Reverse Acting is a durable and versatile pneumatic single seat valve with a single contact surface between the seat and plug, which reduces contamination. Its hygienic, versatile, and space-saving design meets the strictest process safety and cleanliness requirements. Built on the tried-and-true Alfa Laval Unique SSV base, it provides a number of solutions for situations where a standard Alfa Laval Unique SSV would be unable to prevent pressure shock owing to flow direction.

The few moving parts ensure low maintenance costs, high reliability, and easy disassembly. Its comprehensive range of supplementary features allows it to be adapted to the needs of certain procedures. The Unique SSV Reverse Acting technology offers several potential hygienic applications in the food, beverage, dairy, and brewing industries, among others.

Unique SSV Reverse Acting Application

The Unique SSV Reverse Acting method offers several potential hygienic applications in the food, beverage, dairy and brewing industries, among others.

Benefit 

• Excellent valve cleanliness and lifespan
• A smooth inner valve body with no crevices makes it easy to clean
• Specified seal compression extends seal life
• Static seal leak detector improves product safety
• Double lip seal prevents full vacuum
• Reverse acting feature makes the valve more flexible

TECHNICAL DATA

Temperature

Temperature range, standard lip seal: -10 °C to +140 °C (EPDM)

Pressure

Max. product pressure: 1000 kPa (10 bar)
Min. product pressure: Full vacuum
Air pressure: 500 to 700 kPa (5 to 7 bar)

PHYSICAL DATA

Materials

Product wetted steel parts: 1.4404 (316L)
Other steel parts: 1.4301 (304)
External surface finish: Semi-bright (blasted)
Internal surface finish: Bright (polished), Ra < 0.8 µm
Product wetted seals: EPDM
Other seal: NBR

Standard Design

Valve bodies, plugs, actuators and clamp rings are all easily configurable on the Unique SSV Reverse Acting, which is offered in two or three body configurations. Two or four operational ports allow the valve to function as a shut-off valve, while three to six ports allow it to function as a changeover valve. Both the shut-off and changeover versions come with a valve seat that may be assembled to give flexibility.

A defined compression design optimizes the valve seals for durability and long service life. Clamp rings secure the actuator to the valve body and the yoke connects the two. The Alfa Laval ThinkTop V50 and V70, which are available for attachment, allow for sensing and control of the valve. The Alfa Laval Anytime configurator makes it simple to tailor to almost any process need.

Working Principle

A distant source of compressed air controls the Alfa Laval Unique SSV Reverse Acting. Protecting process lines from pressure peaks, the actuator ensures smooth operation. A ThinkTop from Alfa Laval may operate the valve.