Alfa Laval Unique 7000 Small Single Seat Valve

The Small Single Seat Valve from Alfa Laval features the sanitary and flexible design you know and trust in a fractional size. These 1/2 and 3/4 inch valves are applicable for a wide range of tasks, either as stop valves with two or three ports, or as change-over valves with three to five ports. The SSSV series is suitable for use in food, beverage, dairy, and pharmaceutical industries, wherever the sanitation of a seat valve is needed in fractional sizes.

Alfa's Small Single Seat Valves are available with the options you'd expect from a seat valve, including a range of seal materials, body styles, and actuation options. All valve configurations come with the quality manufacturing and design you've come to expect from Alfa Laval. Authorized to carry the 3-A symbol, the SSSV series provided the sanitary operation you require.


  • Shutoff
  • Divert

The Unique 7000 SSSV is available in the following sizes: ½ and ¾ inch.


The small single seat valve series is appropriate for any 1/2 and 3/4 inch application in the food, beverage, and dairy industries where the shut-off of change-over operation of a seat valve is needed.

Working Principle

Small single seat valves can be manually or pneumatically actuated. The SSSV maintains a simple design with only a few moving parts, making it a reliable component in any flow system.

Standard Design

The SSSV is available in ½ inch and ¾ inch OD tube connections. The design is composed of an actuator, lip seal, plug, and one or two valve bodies. The unique plug design is made from PVDF and the valve body interior has a 20 μinch Ra surface finish for high cleanability. The valve maintains an open yoke design and is authorized to carry the 3-A symbol. Valve bodies and actuators are connected via a clamp connection. The piston and valve plug maintain a threaded connection. Tri-Clamp or weld connections are standard.

Product Wetted Steel Parts316L
Finish (ID)<20 Ra Standard
Other steel parts304
Product wetted sealsEPDM (standard), HNBR, FPM (optional)
Other sealsNBR
Material gradesMolded elastomers of EPDM or SFYO-rings and seals of EPDM or SFY (Flouroelastomer)
Technical Data
Max product pressure 145 psi
Min product pressure Full vacuum
Temperature range 14°F – 284°F (EPDM)
Air pressure14.5 – 101.5 psi
  • Pneumatic downward movement, spring return (NO).
  • Pneumatic upward movement, spring return (NC).
  • Manually operated.
½ in¾ in
Weight (lb) Stop valve2.362.43
Weight (lb) Change-over valve3.003.11

*Dimensions valid for both welding ends and clamp ends.

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