TS1212 Pinch Tube Valve User Guide

7. TROUBLE SHOOTING PROBLEM

8. PINCH TUBE REPLACEMENT CAUTION: Make sure the fluid pressure is released before disassemble the valve. Refer to figure 5.0

POSSIBLE CAUSE

CORRECTION

Fluid pressure too low

Increase fluid pressure

1. Release fluid pressure. 2. Disconnect fluid line. 3. Disconnect valve air line.

Operating pressure too low Dispense tip clogged or damaged Fluid cured in pinch tube The stroke adjustment closed

Increase air pressure to 50 psi (3.4 bars)

Replaced tip

4. Remove the valve cap (1), the spring (6) and the shut off piston (5) 5. Lift the two ends of the tube (2) out of the grooves of the valve body (3). 6. Hold the pinch tube at the female luer lock fitting and pull it out of the valve body. 7. Dispose the used pinch tube in an appropriate waste container. 8. Install a new pinch tube by inserting the male fitting of the tube through the valve body. 9. Snapped the both ends of the pinch tube into the groove of the valve body. 10. Reinstall the shut off piston, the spring and the flange.

No Fluid Flow

Replace with new tube

Open stroke adjustment counterclockwise Make sure fluid pressure is constant Increased valve pressure to 50 psi (3.4 bars) Check to make sure the valve controller is providing a consistent output

Fluid pressure fluctuating

Valve operating pressure is too low

Inconsistent Fluid Flow

Valve open time is not consistent

Air trapped in fluid line Purge valve

5

6

Pinch tube lose its flexibility

Replace with new tube

Decrease in fluid flow

Air trapped in fluid line

Purge valve

Fluid drools after the valve closes, eventually stopping

Pinch tube is not installed properly

Re-install tube, follow instructions

Steady drip

4

1

3

2

Figure 5.0

7

8