Unique SSV DN125 and DN150

Unique SSV DN125 and DN150Concept

Unique Single Seat DN125 and DN150 Valves are pneumatic seat valves in a sanitary and modular design giving a wide field of application, e.g. as a stop valve with two (2) or three (3) ports or as change-over valve with three (3) to five (5) ports

Working principle

The valve is remote-controlled by means of compressed air. It has few and simple moveable parts which results in a very reliable valve and low maintenance cost.

Standard Design

The Unique Single Seat DN125 and DN150 Valves come in a one or two body configuration. The actuator is connected to the valve body by means of clamp rings. To facilitate installation the valve is only partly assembled when delivered. The valve has welding ends as standard and is available with fittings as option. It is recommended, due to the valve size and weight, to use supporting equipment, handling and installing the valve. Guidelines are given in the instruction manual (ESE02590). Alfa Laval is not able to supply the recommended supporting equipment.


How it works


The Alfa Laval Unique SSV range consists of one, two or three valve bodies, plug, sealing, actuator and clamp ring.

Operating principle

The Alfa Laval Unique SSV is an air-operated seat valve that is remotely operated by means of compressed air. The valve generally has two working ports for air supply in and for process air supply; for changeover valves, a third port is required.


  • Fully maintainable actuator
  • Product wetted seals in HNBR or FPM
  • Valve sensing and control devices, incl ThinkTop, ThinkTop Basic and IndiTop
  • Fittings in accordance with required standard

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