Operation Procedure - Vieweg Dv-5120 Bedienungsanleitung

Operating Instructions DV-5120
VIEWEG
The PINCH TUBE VALVE provides a wide degree of control for continuous or micro shot
applications of low to semi-viscous fluids.
The "ON/OFF" control is achieved by automatically opening and pinching a molded
polyethylene tube assembly. The adjustable degree of opening or releasing the pinch
EN
closing on the tube assembly determines the shot size or flow rate. In addition, the
air-powered valve can be timed to develop desired shot sizes. Finally, a wide range of
needle tips can be used to further refine the amount of the dispensed output.
The only part of the valve making contact with the fluid being dispensed is the disposa-
ble tube assembly.

OPERATION PROCEDURE

This valve is unique inasmuch as the design prevents rotation of the "SHUT-OFF" blade,
allowing the use of a narrow "chisel point" head on the "SHUT-OFF" piston. This edge
design provides the fine degree of control necessary to make very small shots.
This is accomplished by connecting the air piston (9) to the "SHUT-OFF" piston (2) with
two push rods, which pass on either side of the pump tube (7).
Adjustment of the knob (5) controls the travel of the "SHUT-OFF" piston by limiting its
reverse movement. The "SHUT-OFF" piston is moved by the push rods of the air piston.
The travel of the "SHUT-OFF" piston determines the amount of opening for the pump
tube and, when coupled with a time control, determines the shot size.
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