710PT-U Pinch Tube Valve Operating Manual
© 2020 Fisnar
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710PT-U Rev 1
PRODUCT DESCRIPTION 710PT-U PINCH TUBE VALVE
OPERATION PROCEDURE
The valve will operate in any position, providing the supply source is pressurized. If gravity feed is
being used, the inlet side of the valve must be in an upright, vertical position and the reservoir must
always be six inches above the center line of the valve. Gravity supply will work only with very thin
pourable materials
.
A threaded mounting hole in the side of the body accepts a mounting rod (25).
The valve requires a minimum of 60 psi to properly operate the opening piston. The shut-off function
is achieved by an internal spring.
The air line to the valve should be attached to a three-way air supply valve (manual or automatic).
Actuating this valve will open the pinch tube valve. The open time determines the shot size.
If using a remote reservoir, use the enclosed supply line (20, 21) to provide a connection point to the
pinch tube (17-19) fluid inlet. A syringe barrel can be mounted directly to the pinch tube fluid inlet.
BE SURE ALL AIR HAS BEEN BLED FROM THE SUPPLY LINE TO OBTAIN REPEATABLE
SHOT SIZES OR UNINTERRUPTED FLOW.
NOTE: if material drips from the needle tip, follow instructions below
A.
Fully close the adjustment knob (4) to form a “crease” in the pinch tube.
B.
Operate the valve and slowly open the adjustment knob until material comes out from the tip.
C.
Adjust the knob position per flow rate requirement.
D.
Tighten the lock nut (15) to secure the flow rate adjustment.