00197490-03_SM_CP20-P-M2_EN保养维护.pdf - 第53页
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 p…
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.
6 Pressure control valve (PRV)
6.2 Replacing the membrane and other small parts on the PRV
54 Service Manual SIPLACE SpeedStar (C&P20 P / C&P20 M2) 03/2018
Fig.75: Blowing through the PRV
► Clean all the openings of the pressure control
valve with a compressed air pistol.
Observe the order of work:(1) to(5).
Fig.76: Cleaning the inside
► Clean the inside with a lint-free cloth soaked in
isopropyl.
Fig.77: Cleaning the plunger
► Clean the plunger with a lint-free cloth soaked in
isopropyl.