Alfa Laval Unique SSV Y-body

The Unique Single Seat Y-body valve meets the highest demands of your process in terms of hygiene and safety. Built on the well-proven Unique SSV platform the Y-body version offers a straight through product flow path and is designed for gentle product treatment. The main use for these valves is in applications involving high viscosity or large particulates.

Working principle

The valve is a pneumatic seat valve in a hygienic and modular design 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 valve is designed to deliver years of reliability and performance as can be expected from all Alfa Laval products. The actuator is connected to the valve body using a yoke and all components are assembled with clamp rings.

Technical Data

Temperature

Temperature range: . . . . . . . . . . . . . -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 – 7 bar)

Actuator function

– Pneumatic downward movement, spring return.
– Pneumatic upward movement, spring return.
– Pneumatic upward and downward movement (A/A).

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 seals: . . . . . . . . . . . . . . . . . . NBR
Plug seal: . . . . . . . . . . . . . . . . . . . TR2 (floating PTFE design)

Options

A. Control and Indication: IndiTop, ThinkTop or ThinkTop Basic.
B. Product wetted seals in HNBR/NBR or FPM.
C. External surface finish bright.

Note!
For further details, see instruction ESE00608.

Other valves in the same basic design
The Unique SSV valve range includes several purpose built valves. Please use the Alfa Laval computer aided selection tool (Anytime configurator) for full access to all models and options.

– Single seat valve.
– Reverse acting valve.
– Long stroke valve.
– Manually operated valve.
– Aseptic valve.

The actuator comes with a 5 years warranty

Dimensions

Please note!
Opening/closing time will be affected by the following:
– The air supply (air pressure).
– The length and dimensions of the air hoses.
– The number of valves connected to the same air hose.
– Use of a single solenoid valve for serial connected air actuator functions.
– Product pressure.

Air Connections Compressed air:

R 1/8″ (BSP). internal thread.

Pressure drop/capacity diagram

Note!
For the diagrams the following applies:
Medium: Water (20°C)
Measurement: In accordance with VDI2173
Pressure drop can also be calculated in Anytime configurator.

Pressure drop can also be calculated with the following formula:
Q = Kv x √∆p
Where
Q = Flow in m3/h.
Kv = m3/h at a pressure drop of 1 bar (see table above).
∆ p = Pressure drop in bar over the valve.
Where
Q = Flow in m3/h.
Kv = m3/h at a pressure drop of 1 bar (see table above).
∆ p = Pressure drop in bar over the valve.
2.5″ shut-off valve, where Kv = 111 (See table above).
Q = Kv x √∆p
40 = 111 x √∆p

Pressure data for Unique Single Seat Valve Y-body