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2 Description
2.1 Theory of Operation
The LOCTITE
®
product is transported through a product feedline to the diaphragm valve
by the dispensing pressure in the product reservoir.
At the shut off valve assembly PTFE material is used for the area in contact with the
adhesive to prevent curing of adhesive in this part of the diaphragm valve.
The opening of the diaphragm valve takes place by pressuring an internal single acting
cylinder. In the inactive position, the diaphragm valve is closed by spring force. A piston
pushing against a diaphragm, which seals off the product bore in the valve, achieves
sealing in idle position.
The floating mounted diaphragm enables easy repair and service.
As a result the diaphragm valve is not suitable for moisture sensitive product like CA`s.
The amount of product dispensed is controlled by:
–The amount of pressure in the reservoir.
–The length of time the shut off valve remains open.
–The dispensing needle.
The more precise and constant the amount of Loctite
®
product the longer has to be the
dispensing time and lower the dispensing pressure.
