00197469-02_SM_Twin_Kunde_EN - 第29页

4 Pneumatic and pressure control valve (PRV) 4.2 Replacing the pressure control valve (PRV) Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020 29 Fig.30: Pull off the hose (example of Twin / Twin HF shown…

4 Pneumatic and pressure control valve (PRV)

4.2 Replacing the pressure control valve (PRV)

28 Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020

Fig.27: Screws fastening the air filter (example of Twin /

Twin HF shown)

► Only for Twin / Twin HF:

Loosen the two screws(1) fastening

the air filter, so that the air filter can be

moved easily but the screws can not

fall out.

Fig.28: Push the air filter into the head (example of Twin /

Twin HF shown)

► Only for Twin / Twin HF:

Turn the air filter onto its side(1) and

push it through the opening(2)

into the

inside of the head.

Fig.29: Screws fastening the air filter (Twin VHF)

► Only for Twin VHF:

Take off the filter cap and remove the

two screws(1)

fastening the air filter,

so that the air filter can move freely.

4 Pneumatic and pressure control valve (PRV)

4.2 Replacing the pressure control valve (PRV)

Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020 29

Fig.30: Pull off the hose (example of Twin / Twin HF shown)

► Pull the bottom hose off the precision

tube.

Fig.31: Screws fastening the PRV (example of Twin / Twin

HF shown)

► Remove the two screws fastening the

PRV.

► Only for Twin / Twin HF:

Pull the PRV downwards, to unplug it

from the head main board.

Fig.32: Remove the PRV (example of Twin / Twin HF

shown)

► Only for Twin / Twin HF:

Pull the PRV and air filter sideways out

of the head together.

4 Pneumatic and pressure control valve (PRV)

4.2 Replacing the pressure control valve (PRV)

30 Service Manual SIPLACE TwinStar (Twin, Twin HF, Twin VHF) 07/2020

Fig.33: Removing the PRV (Twin VHF)

► Only for Twin / Twin HF:

Pull the PRV and air filter upwards out

of the head together.

Fig.34: PRV mount and air filter

► Pull the silicon hose (1) off the vacuum

connection (5)

on the PRV.

► Remove the two screws(4) fastening

the mount(3)

for the PRV precision

pipe(2)

 NOTICE!

This holder for the digital PRV has four

fixture holes, of which the two lower

ones (4)

are used.

Installation

Installation is performed by following the above instructions in the reverse order. Also observe the

following instructions:

► Fix the two screws fastening the mount to the PRV with a torque of 0.6Nm.

► Fix the two screws fastening the PRV to the head with an Loctite 243 and tighten these with a

torque of 0.6Nm

► Make sure that the air filter hoses are not crossed over one another.

► Tighten the cover and the two air filter fastening screws hand-tight.

► Observe the installation instructions in the following sections:

5.1 "Replacing the head main board" [}65]

3.1 "Replacing the return unit buffer" [}17]

► Perform "zero correction" for the pressure control valve.