Theory of Operation
The CA300 is an all plastic dispense valve that uses a unique rigid diaphragm design to
act as a front closing valve to accurately dispense small dots and fine beads. This valve
can be used in handheld applications, mounted on a fixture for hands free dispensing, or
mounted to a robot for automated dispensing. The all plastic construction allows
adhesives such as Cyanoacrylates and Anaerobics to be dispensed through the valve along
with a variety of other low to high viscosity fluids. Applications can include dispensing
dots, beads, or for potting.
The CA300 has a divorced design comprising of two major sections. These include:
•
Air section (Aluminum top portion)
•
Fluid section (Delrin body with Teflon diaphragm)
Air Section
The air section is an aluminum body with a simple piston/cylinder combination used to
open and close the valve. A stroke adjustment bolt in the upper air body controls how far
the piston and needle assembly can retract thus regulating the rate of fluid flow.
Fluid Section
The fluid section is made up of a Delrin with a rigid Teflon diaphragm connected to the
air piston. Fluid dispenses as the point of the diaphragm is lifted out of the fluid section
orifice then stops as it moves back into place. The stroke adjustment bolt of the air
cylinder regulates the distance that the diaphragm tip can lift out of the fluid section
orifice thus controlling rate of fluid flow.
Wetted Parts
Wetted parts on the CA300 include:
- Delrin
- Teflon
- Kalrez
- Polyethylene
Safety
Due to material contents being under pressure eye protection is required for
operators. Refer to MSDS sheets on material being dispensed for other precautions.
