00197490-03_SM_CP20-P-M2_EN保养维护.pdf - 第54页
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 opening…
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.
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 55
Fig.78: Greasing the plunger 1
► Grease the plunger slightly at the higher positions
with Isoflex Topas 5051.
Remove any excess grease from the gaps.
Fig.79: Greasing the plunger 2
► Grease the rotation lock pin(1) slightly with To-
pas 5051.
Fig.80: Inserting the membrane
► Insert the new membrane.
Make sure that the membrane is fitted properly at
the housing and is not damaged.
Fig.81: Inserting the plunger
► Push the valve plunger back into the PRV.
The nib of the plunger must engage in the recess
on the valve.
Check by trying to turn the plunger. If it can be
turned, the nib has not yet engaged in the recess.