2. Description
2.1 Theory of Operation
The Loctite
®
product is transported through a product feed line 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 pressurizing an internal
single acting cylinder. In the inactive position, the diaphragm valve is closed by spring force.
Sealing in idle position is achieved by a piston pushing against a diaphragm which seals off the
product bore in the valve.
The floating mounted diaphragm enables easy repair and service. As a result the diaphragm valve
is not suitable for moisture sensitive product like cyanoacrylates.
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 the dispensing time and
the lower the dispensing pressure.
2.2 Operating Elements and Connections
1
2
3
4
5
6
7
1
Pressure hose connection
2
Actuator assembly
3
Diaphragm
4
Shut off valve assembly
5
Product feed line connection
6
Luer-Lok adapter
7
Luer-Lock
3
