APJ 1000 maintenance manual

All seal ring of inside valve is forbidden to be soaked in corrosivity cleaning solution, including ethyl alcohol: Reason: the seals are engineering plastic material, soaked in the organ

Maintenance manual of APJ1000 piezoelectric valve

I Precautions for use

There are some attention points related to construction of APJ1000 jetting valve and piezoelectric driven principle:

1 During the procession of using valve, successive tape-ranked dots (连连连连连连连) shouldn’t be too much that 1000 dots/ time is its base number Interval of successive times should be at least 5s

Reason: cleaning glue successively will produce more heat for successive dot in cool state which would make inside temperature to increase suddenly and may burn the inside piezoelectric stack in serious condition

2 High frequency operation successively using in a long time must be added air-cooling and heat dissipation

Reason: decreasing temperature can make input more stably and prevent ceramic be burned

by high temperature Decreasing 0.02~0.01Mpa is enough Cooling gas must be filtered

3 When the valve is opened, slightly tighten the nozzle and seal

Reason: piezoelectric only needs small output displacement to realize dispensing, because screwing too tight will condense a part of output displacement which will decrease its performance

4 All seal ring of inside valve is forbidden to be soaked in corrosivity cleaning solution, including ethyl alcohol:

Reason: the seals are engineering plastic material, soaked in the organic solvent will destroy the seal structure and size to influence its sealing

5 When valve that end cleaning is not applicable to use, every wear parts should not be installed in valve directly and need to be put together to take care of

Reason: prevent nozzle or other parts blocked in exposed circumstance

6 Prohibit hot plug

Reason: when valve power on, plugging the signal line on valve body may lead overshoot and cause damage to valve which may give irreversible damage to dispensing performance

7 If the equipment is not applicable at some time, you’d better to close the power of controller Reason: If equipment has power but don’t work for a long time, it will not operate so fluently when it open again and parameter needs to be reset usually Turning off the power and opening it again, the equipment can be used again with previous parameter

II APJ1000 parts analysis diagram

III Maintenance

After using APJ1000 dispensing valve each time, it needs appropriate cleaning and maintenance

to prolong its service life, and keeps it high dispensing quality and consistency at the same time After long time using, valve needs complete maintenance which usually once week

3.1 Fluid contact parts cleaning

The main part of maintenance of APJ1000 jetting valve is fluid contact parts cleaning in case after long time using that fluid solidify or block in chamber The steps of maintenance and cleaning are

as follows:

(1) Close feeding pressure, turn air pressure to 0, cutting power line of controller and remove signal line of controller heat connect line and so on

(2) Dismount APJ1000 jetting valve from fixed panel of platform

(3) Screw off nozzle cage in overlooking clockwise direction by nozzle spanner As shown in the figure 7-1;

Figure 2.1 the direction of screwing nozzle cage

(4) Carefully take off nozzle cage, nozzle, nozzle-head fastener and O ring from the chamber; use the end of three convex foot of spanner to screw off nozzle-head fastener from nozzle cage;

as shown in the figure 2-2 The surface of unscrewing nozzle is wiped up by a cotton swab Then use 1.5 nozzle cleaner guide glue in the inner channel Lastly, clean glue on inner wall of chamber by cotton swab

Nozzle cage

Nozzle spanner

Figure 2.2 dismounting and cleaning of nozzle

(5) a dismount seal ring on nozzle-head fastener, as shown in the figure 2-3;

b clean nozzle: guide glue in pore of nozzle by odontorine and blow out left glue by pneumatic gun Repeat this operation to assure there has no glue in pore of nozzle; the method of odontorine unchoking nozzle cage is as follows; at last, nozzle and nozzle-head fastened are put in ultrasonic utensil or designated solvent to wash by water at least 10 min;

Nozzle Nozzle cage

Guidance spanner O-ring

Figure 2.3 The method of unchoking nozzle

(6) Use 2.5mm hex wrenches to unscrew M3 socket head cap screw to separate fluid channel and valve Fluid channel should be taken down carefully Because seal ring has some force of friction, after unscrew to an extent, fluid channel needs to be hardly pulled down As the Figure2.4;

odontorine

nozzle

Figure 6.4 chamber dismounting

(7) After dismantle liquid channel, erect liquid channel and Luer stand need to be split off by 2.5mm hex wrenches; then the Luer taper is unscrewed by the other end of dispensing spanner Clean inside wall which has liquid by 1.5mm nozzle cleaner and hairbrush, after then, Luer taper, Luer stand and erect liquid are all put in ultrasonic equipment at least 10 minutes Specific information is as the following Figure 2.5 All dismantling O-ring, sealing

packing and spring ring （ （ （ （ mustn’t be soaked by cleaning solvent, including ethyl alcohol;

The specific cleaning process is as follows:

Sealing gasket/ heat insulated pad

Spring ring

O ring Luer taper

Erect fluid channel

M4 screw Luer stand

Figure 2.6 cleaning method of fluid channel

(8) Procession of dismantling of firing pin: when it is necessary, use the end of two convex foot

of guide to wretch dismantle firing pin Show as the Figure2.7 The surface of firing pin is cleaned by dust-free cloth which is dipped in cleaning solution

2.2 Assembling after cleaning

1 Put nozzle into inner groove of nozzle-head fastener, then screw nozzle-head fastener into nozzle cage by triangle spanner To ensure nozzle will not loss in nozzle cage

1.5 nozzle cleaner

Hair brush

Firing pin Guidance of firing pin

Guidance spanner

Figure 2.8

2 Install guidance into cleaning firing pin and smear lubricate in the position which firing pin

and guidance contact (our company provide it) to make movement of firing pin smoothly

and softly Finally install module of firing pin and guidance into valve

3 Put auxiliary ceramics plate into ceramics heat resisting sheet

4 Install vertical flow channel into it and tighten bolt.

5 Screw nozzle module into the glue position and ensure it will not be screwed too deep, because firing pin will be moved down after valve powered on

Note: When valve that end cleaning is not applicable to use, every wear parts should not

be installed in valve directly and need to be put together to take care of in case nozzle fall accidentally or bump into sharp parts to damage nozzle.