TS5622VU-DVD.pdf - 第8页

8 8. MAINTENANCE AND CLEANING Normally, purging th e valve with appropriate flu sh material or solvent after use is suf ficient for cleaning. However some material may cause a buildup in the valve cham ber, in this case …

7. TROUBLE SHOOTING

PROBLEM POSSIBLE CAUSE CORRECTION

Fluid pressure too low Increase fluid pressure

Operating pressure too low Increase air pressure to 70 psi (4.8 bars)

Dispense tip clogged Replaced tip

Fluid cured in valve chamber Clean valve thoroughly

No Fluid Flow

The stroke adjustment is fully

closed

Open stroke adjustment

counterclockwise. One full turn max.

Fluid pressure fluctuating

Make sure fluid pressure is constant

Valve operating pressure is too

low

Increased valve pressure to 70 psi (4.8

bars)

Valve open time is not consistent

Check to make sure the valve controller

is providing a consistent output

Inconsistent

Fluid Flow

Air trapped in fluid housing Purge valve

Fluid drools after the valve

closes, eventually stopping

Air trapped in fluid housing Purge valve

Worn diaphragm Replace diaphragm

Material build up in fluid

housing

Clean fluid housing

Fluid pressure exceeds 70 psi

(4.8 bars)

Lower fluid pressure

Steady Drip

Valve re-assembled incorrectly

after cleaning

Refer to Maintenance section

Fluid leaks between

diaphragm and fluid housing

Mounting screws loose Tighten screws

Fluid leaks out of bleed hole Diaphragm ruptured Replace diaphragm

8. MAINTENANCE AND CLEANING

Normally, purging the valve with appropriate flush material or solvent after use is sufficient for

cleaning. However some material may cause a buildup in the valve chamber, in this case periodic and

thorough cleaning will be required.

8.1 CLEANING

Refer to figure 6.0

1. Release fluid pressure

2. Disconnect fluid line

3. Disconnect valve air line

4. Remove needle retaining cap (12) then remove the dispense needle.

5. Remove the two socket head cap screws (7) from the fluid housing (6)

6. Pull the fluid housing away from the air cylinder assembly (10)

7. Clean Diaphragm (5) and fluid housing (6)

8. Reinstall the fluid housing (6).

9. Align the fluid housing mounting holes with diaphragm and air cylinder holes.

10. Reinsert the two socket head cap screws (1) and hand tightens them only. Do not exceed 14 in lb

(1.58 N-m) torque.

CAUTION: Make sure the fluid pressure is released before disassemble the valve.

NOTE: Avoid using sharp probes for cleaning. Any nicks or scratches on the

diaphragm or the sealing area of the fluid housing may cause leakage.

8.2 TO CHANGE THE DIAPHRAGM

Tool required: Flat tip screwdriver, Snap ring flier, 7/64” hex wrench.

1. Remove needle retaining cap (12) then remove the dispense needle.

2. Remove the two socket head cap screws (7) from the fluid housing (6)

3. Pull the fluid housing away from the air cylinder assembly (10)

4. Remove the old diaphragm (5) by unscrew it in the counterclockwise direction.

5. Install the new diaphragm by threading it in the clockwise direction. Make sure the internal

thread on the diaphragm is not stripped or cross-threaded.

6. Hand tightened the diaphragm until it bottoms out against shoulder on piston rod. At this point,

do not over tighten or loosen the diaphragm to align the diaphragm and air cylinder holes.

7. The valve is designed so that the fluid housing can be rotated in 45° increments to allow for

material input/output alignment. To align the holes of the diaphragm with the appropriate holes

in the air cylinder body, insert a small flat tip screwdriver through the hole in the stroke control

knob (8) and engage the piston rod slot. Turn the screwdriver clockwise to rotate the rod, piston

and diaphragm assembly until the appropriate holes are lined up.

8. Reinstall the fluid housing (6).

9. Align the fluid housing mounting holes with diaphragm and air cylinder holes.

10. Reinsert the two socket head cap screws (7). Do not exceed 14 in lb (1.58 N-m) torque.