| Keofitt Aseptic Sampling Valve |
 |
| Keofitt Aseptic Sampling Valve. |
Working principle
The Keofitt Aseptic Sampling Valve is designed for sterilization before and after each sampling.
Open valve: Sampling
The manual valve is opened by rotating the handle (adjustable valve) or by activating the lever (on/off valve). The stem and the membrane are then retracted, allowing liquid to pass.
Closed valve: Sterilizing
Using the reverse procedure the built-in spring closes the valve, keeping the channel between the hose pieces open for sterilization. If using steam a small pressure relief valve (optional) on the outlet is recommended.
Standard Design
The Keofitt Aseptic Sampling valve consists of three parts, a valve body, a valve head and a membrane. The rubber membrane is placed on the stem of the valve head and works as a stretchable plug. The valve bodies and valve heads are interchangeable.
The valve is available in two sizes:
- - M4 valve for low viscosity products like water, beer, wine and liquid milk.
- - W9 for high viscosity products like fruit yoghurt, syrup and ice cream.
W9 valve is available with micro ports, to enable sampling by hyperdermic needle.
Valve bodies:
Type T: Tank (welding).
Type P: Pipe (welding).
Type C: Clamp.
Type S: Socket (threaded).
Valve heads:
Type H: Turning handle.
Type K: Removable key.
Type Q: Quick lever.
Type N: Manually and pneumatically operated.
Type B: Turning handle (for pressure up to 12 bar).
The valve is authorized to use the 3A symbol.
a. Open valve, Sampling.
b. Closed valve, Sterilizing.Fig. 1. Principle.
Dimensions (mm)
| Pos. |
M4 |
W9 |
| |
mm |
inch |
mm |
inch |
| A |
70 |
2.76" |
90 |
3.54" |
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|
|
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| C |
5 |
0.2" |
8 |
0.31" |
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| D (Pipe) |
*25 |
*0.98" |
*25 |
*0.98" |
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|
| |
|
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|
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| D (Socket) |
M28x1.5 |
M1.1"x0.06" |
M28x1.5 |
M1.1"x0.06" |
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* only for DIN
Materials
| Valve body: |
Stainless steel AISI 316L (1.4404). |
| Valve head: |
Stainless steel 301, 303, 316L,PEHD/black, PTFE. |
| Membrane: |
Silicone rubber.EPDM rubber.PTFE |
Technical data
Pressure
| Max. working pressure |
87 psi (6 bar). |
Max. working pressure:
| M4 Type B: |
174 psi (12 bar) |
| W9 Type B: |
218 psi (15 bar) |
Temperature
| Temperature range: |
33.8°F - 266°F. |
| Max. sterilization temperature, |
|
| dry steam 29 psi (2 bar) |
249.8°C |
Steam must be dry, since condensate will damage the membrane. It is recommended that the membrane be changed every 100 samples/sterilizations or depending on working conditions or experience.
| Valve |
Viscosity |
| M4 |
0-100 cP |
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| W15 |
0-50000 cP |
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Options
- - Key ring for valve head, type K.
- - Valve head for pneumatic and manual operation, type N ("A" dimension increases).
- - Valve head, type B (blocking) without spring, to be used if risk of pressure shocks (handle is white).
- - For various accessories please see Ordering Leaflet.
Ordering
Please state the following when ordering:
- - Please state the following when ordering:
- - Valve size, M4 or W9.
- - Type of valve body.
- - Type of valve head.
- - Accessories.
- - Other options.
Fig. 2. Dimensions.
| Valve bodies: |
Valve heads: |
Type T: Tank (welding) |
Type B: Turning handle |
Type P: Pipe (welding) |
Type Q: Quick lever |
Type C: Clamp |
Type N: Pneumatic and manual |
Type S: Socket (threaded) |
Type H: Turning handle |
| |
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Fig. 3. Valve bodies and valve heads (interchangeable).
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