Alfa Laval Unique sampling valves make it possible to obtain representative samples of food and beverage, personal care and biopharm products.
These reliable single- and double-seat valves contribute to quality, and cost-effective sampling.
Alfa Laval Unique single-seat and double-seat sampling valves meet the requirements for high quality product extraction in a variety of hygienic processes. Both provide high accuracy, exceptional reproducibility of sampling and excellent reliability.
All Unique sampling valves feature a valve body made of a single piece of stainless steel, providing smooth, crevice-free surfaces. Because no welding is required, the risk of pore formation and cracking in the welds and subsequent risk of bacterial build-up is eliminated.
The customary, ergonomically designed handle provides exceptional control and convenience during operation. Replacing the membrane seal is straightforward; loosening the handle and lifting off the membrane is all that is required.
The Unique Sampling valve range comprises 4 valve configurations.
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Unique sampling valve - Single seatThe Unique single-seat sampling valves are ideal for use in various applications. This standard valve can easily be upgraded to a Unique double-seat sampling valve with a convenient, easy-to-use upgrade kit. |
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Single seated pneumatic actuatorThe single seated sampling valve with the pneumatic actuator ensures opening and closing of the valve. With the pneumatic actuator remote sampling is an option and for indication of the valves positioning an indication proximity switch, can be added. |
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Unique sampling valve - Double seatSpecially engineered, the Unique double-seat sampling valves are an excellent choice for use in applications where a higher cleanability is required. Patented technology ensures sterilization of the valve seat and channels, thus ensuring sampling precision and accuracy and guaranteeing representative sampling. |
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Double seated pneumatic actuatorThe double seated sampling valve with the pneumatic actuator ensures total sterilization of the entire valve seat and channels. With the pneumatic actuator remote sampling is an option and for indication of the valves positioning an indication proximity switch, can be added. |
Unique sampling valves consist of a valve body, an actuator and membrane seal. The rubber membrane seal is placed on the stem of
the actuator and functions as a stretchable plug. The valve bodies and
actuators are interchangeable.
Unique sampling valves are available as single- and double-seat
sampling valves with working pressures up to 6 bar and maximum
temperatures of 130 °C.
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Valve type |
Size |
Product type |
Max. Particle size |
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Single-seat Double-seat |
Type 4 |
Low viscosity |
Up to 2,5 mm |
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Single-seat Double-seat |
Type 10 |
Medium viscosity |
Up to 7 mm |
|
Single-seat Double-seat |
Type 25 |
High viscosity |
Up to 20 mm |
Designed for standard hygienic sampling, the single-seat sampling
valve has two positions: open and closed. It can easily be upgraded to a
double-seat valve by replacing the handle or actuator with an upgrade
kit.
Open position for sampling: To begin the sampling process, rotate the
handle in a counter-clockwise direction to open the valve, if using an
manual valve. If using a actuator, open the valve by activating the actuator. This retracts the valve stem and the membrane and enables the product to flow freely through the open valve.
Closed position for sterilization: To stop the sampling process, rotate
the handle in a clockwise direction to close the valve, if using a manual
valve or shut the air connection, if using a pneumatic actuator.
This shuts off the flow and makes the channel in between the connecting hoses available for sterilization. If steam is used for Sterilization-in-Place, Alfa Laval recommends the use of an optional pressure relief valve on the outlet.
The design of single-seat technology poses challenges for complete
sterilization. In closed position, the membrane seal comes into contact
with the valve seat. These points of contact are virtually impossible to
clean due to tight surface compression and may therefore accumulate
product residue and microorganisms. For that extra level of security to
ensure a more representative sample, Alfa Laval recommends double seat technology.
Designed for truly sterile sampling, the double-seat sampling valve has three positions: open, closed and sterilization.
To begin the sampling process,
Manual valve: rotate the handle in a counter-clockwise direction to open the valve.
Pneumatic valve: supply air to the open connection.
This retracts the valve stem and membrane seal and enables the product to flow freely through the open valve.
Closed position:
To stop the sampling process:
Manual valve: Rotate the handle in a clockwise direction.
Pneumatic valve: Shut off the supplied air to the open connection.
Sterilization position:
To set the valve in sterilization position,
Manual valve: rotate the handle clockwise to the steam position.
Pneumatic valve: apply air to the steam connection.
This extends the valve heads inner spindle into the inner seat and stop product flow in the valve port. At the same time the valve heads outer spindle retracts and lifts the membrane seal away from its normal seat. Now it is possible to access the hard-to-reach areas on the seat surface, ensuring thorough sterilization and making the Unique double-seat sampling valve a solid and reliable choice to achieve 100% representative sampling.
