Graco 332092B Instrukcja Użytkownika Pobierz pdf (Strona 18)

Troubleshooting

Although good housekeeping, preventive maintenance and proper operating procedures will lengthen the

life of the valve, all mechanical devices will develop problems from normal wear. Following are some of

the possible difficulties and likely causes that may arise with the valve. If these do not correct the situation,

call the technical service department at Dispensit®.

Problem

Possible Cause

Solution

Nothing Happens

1. Pneumatic or electrical problems with the

controller or controlling device.

2. Foot switch or cycle start switch are not

working properly.

3. Valve is locked up.

1. Have the controller or controlling devices

checked and serviced as needed.

2. Have the foot switch or cycle start switch

checked and serviced as needed.

3. See problem “Valve Locked Up” below.

Valve Cycles but

Material is Not

Dispensed

1. Material line is closed off at the valve.

2. Low air pressure on the material transfer

system.

3. Low material pressure setting on material

transfer system.

4. Material is cured in the needle or needle

block.

5. Not enough M.R. stroke

1. Open any “in-line” restrictions so material

flows smoothly to the dispense valve.

2. Adjust air pressure to proper determined

setting, which is needed to dispense the

material involved.

3. Adjust material output pressure to proper

determined setting, which is needed to

dispense the material involved.

4. Replace the dispense needle with a new

one.

5. Increase the stroke of the Metering Rod to

get more material.

Irregular Dispense

1. Inconsistent material (cured, dried, or

separated)

2. Air in the material.

3. Valve is cycling too fast, not allowing the

metering rod chamber to fill.

4. Cycle timing on the controller or

controlling device is improperly set.

1. Replace the material supply.

2. Replace the material supply.

3. Controller timing needs to be adjusted.

4. Adjust as needed, as per manufacturers

recommendations.

Sluggish Cycle Time

1.Pistons and/or cylinder walls are poorly

lubricated.

1.Disassemble the Drive Cylinder Assembly

and the End Cap Assemblies, lubricate, align,

and reassemble.

Valve Drools

1. Air in the material.

2. Worn Metering Rod.

3. Worn seals.

4. Worn diaphragm.

1. Replace the material supply.

2. Replace Metering Rod.

3. Rebuild valve with a new seal kit.

4. Replace the diaphragm.

Dispense Valve is

Locked Up

1. Wrong material for this particular valve

design.

2. Oil buildup on cylinder walls from air

supply.

3. Too low air pressure on valve.

1. Make sure the wetted components and

spool/sleeve assembly are compatible with

material. Refer to p5-2, “Optional Equipment”.

2.Disassemble, clean and/or rebuild valve.

Use only NON-lubricated air with this valve.

3. Increase air pressure.

Material build upon

metering rod.

1. Material getting past the upper seal due to

a lack of fluid in the wet cup.

1. Rebuild the valve and pay special attention

to the metering rod.

1 2 ... 13 14 15 16 17 18 19 20 21 22

Komentarze do niniejszej Instrukcji

Brak uwag

Graco 332092B Instrukcja Użytkownika Strona 18

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Nie Graco 332092B