Pneumatic and manual Small Single Seat Valve.

Application

The Small Single Seat Valve with its sanitary and flexible design is applicable for a wide range of tasks either as a stop valve with two or three ports or as a change-over valve with three to five ports.
The valve is suitable for use in food, beverage, dairy and pharmaceutical industries.

Working principle

The valve 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” and ¾” OD tube. The design is comprised 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 3A 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.

Actuator function

• - Pneumatic downward movement, spring return (NO).
• - Pneumatic upward movement, spring return (NC).
• - Manually operated.

Valve body combinations

10	30	21	41	23	43

Pressure drop/capacity diagrams

Stop valve
		Change-over valve
NOTE!
For the diagrams the following applies:
Medium: Water (68 °F).
Measurement: In accordance with VDI 2173

Pressure data for Small Single Seat Valve

Actuator type / function

10.Pneumatic downward movement, spring return (NO-lower seat)
20. Pneumatic upward movement, spring return (NC-lower seat)

Table 1: Stop and divert valve. The table shows the approx. static pressure (p) in psi without leakage at the valve seat.
Actuator / Valve body combination and direction of pressure	Air pressure	Actuator	Valve size
	(psi)	type/	OD	OD
		function	½”	¾”
Spring Closes		10(NO)	Min.145	Min.145
Air Closes	29	20(NC)	130.5	-
	43.5	20(NC)	Min.145	Min.145

Table 2: Stop and divert valves. The table shows the approx. static pressure (p) in psi against which the valve can open.
Actuator / Valve body combination and direction of pressure	Air pressure	Actuator	Valve size
	(psi)	type/	DN/OD	DN/OD
		function	½”	¾”
Spring Opens		10(NO)	Min.145	Min.145
Air Opens	29	20(NC)	Min.145	Min.145

Caution, opening/closing time:

Opening/closing time will be effected by the following:

• - The air supply (air pressure).
• - The length and dimensions of the air hoses.
• - Number of valves connected to the same air hose.
• - Use of single solenoid valve for serial connected air actuator functions.
• - Product pressure.

Air Connections Compressed air:

R 1/8" (BSP), internal thread.

a. Stop valve	b. Divert valve

Technical data

Options

• - Material certification (3.1.B).
• - Adapter for ThinkTop®.
• - Automation: See chapter in Product Catalogue.
• - Product wetted seals of HNBR or fluorinated rubber (FPM).
• - Surface finish external ≤ 32 µinch Ra.

Ordering

Please state the following when ordering:

• - Size.
• - Body with welding ends or clamp ends.
• - Actuator function, NC or manual.
• - Options.