00197490-03_SM_CP20-P-M2_EN保养维护.pdf - 第52页

6 Pressure control valve (PRV) 6.2 Replacing the membrane and other small parts on the PRV 52 Service Manual SIPLACE SpeedStar (C&P20 P / C&P20 M2) 03/2018 Fig.69: O-ring on vacuum sensor ► Remove the vacuum sen…

6 Pressure control valve (PRV)

6.2 Replacing the membrane and other small parts on the PRV

Service Manual SIPLACE SpeedStar (C&P20 P / C&P20 M2) 03/2018 51

Fig.64: Removing the cover

► Remove the two screws and take the cover off

the PRV membrane.

Fig.65: Checking the membrane

► Carefully check the membrane for any damage.

ð If no damage can be found, close the cover

window again.

You do not need to replace the membrane in

this case.

ð If there is any damage, proceed with the next

step.

Fig.66: Removing the cover plate

► Remove the three screws fastening the cover

plate and remove the cover plate.

Fig.67: Top board

► Remove the two screws and swing the board

slightly upwards.

 CAUTION!

Make sure that you do not swing the board up

too far. If you do, this could cause the flexprint

cable to break.

Take care not to damage the sensor O-ring.

Fig.68: Side board

► Remove the three screws and then remove the

board.

 CAUTION!

Never loosen or remove the screw in the

middle!

6 Pressure control valve (PRV)

6.2 Replacing the membrane and other small parts on the PRV

52 Service Manual SIPLACE SpeedStar (C&P20 P / C&P20 M2) 03/2018

Fig.69: O-ring on vacuum sensor

► Remove the vacuum sensor O-ring.

Fig.70: Removing the plunger

► Remove the plunger with the help of a size 10

wrench.

Fig.71: Removing the membrane

► Remove the old, damaged membrane and its

residues.

6 Pressure control valve (PRV)

6.2 Replacing the membrane and other small parts on the PRV

Service Manual SIPLACE SpeedStar (C&P20 P / C&P20 M2) 03/2018 53

Installation

Fig.72: Checking the plunger

► Check the plunger for damage.

► If the plunger is damaged, replace the whole

PRV.

► If the plunger is ok, proceed with the next step.

Fig.73: Checking the PRV inside

► Check the inside of the PRV for damage.

► If the inside of the PRV is damaged, replace the

whole PRV.

► If the inside is not damaged, proceed with the

next step.

Fig.74: Cleaning

► Clean the seat of the plunger tip and the venturi

nozzle until the cotton swab is no longer dirty

when it comes out.

Use a cotton swab coated with isopropyl.