Replace The Service Valve And Vent; Replace The Bank Bleed Valve. P51 - BeaconMedaes MAT-S Installation, Operation And Maintenance Instructions

Medical Gas Supply System
6.17 Replace the Service Valve and
Vent Valve.
CAUTION! Service valve and vent valve
replacement requires total isolation of the manifold.
Refer to Section 6.2.
Vent
Valve
Connector
6.17.1 Loosen the nut.
6.17.2 Loosen the connector from the vent valve or
service valve.
6.17.3 Using a 21 mm wrench, loosen the vent valve or
service valve from the machined block.
6.17.4 Install the new vent valve or service valve, fix the
connector and nut.
6.17.5 Rotate the handle of vent valve anti-clockwise
to close position, rotate the handle of service valve
clockwise to open position.
6.18 Replace the Bank Bleed Valve.
WARNING! Vent all inlet pressure and outlet
pressure to 0 bar prior to replace the bank bleed valve.
NOTE - 2 stage regulator maintenance can be performed
nd
with the associated bank isolated, while running on the
opposite bank of the manifold.
Following procedure describes process to service 2
stage pressure regulator. If necessary, bank bleed valve
service can be performed while manifold is in service.
However, this should only be done by qualified techni-
cians experienced in servicing medical equipment.
6.18.1 If the optional service mode is selected during
maintenance, complete steps in 6.1.
6.18.2 Complete the steps in 6.3 to perform this
maintenance with one bank running. If total isolation is
preferred, follow steps in 6.2.
Service
Valve
Machined
Nut
Block
NOTE - Figure 38 shows example of bank bleed valve
on the left 2 stage regulator maintenance, mirror to
nd
opposite side for working on the right bank.
Figure 38 - Isolating the Left 2
Line
Isolation
Valve
Bank bleed
valve
Intermediate
Isolation
Valve
6.18.3 Depressurized the gas pressure inside the 2
stage regulator by pressing the bank bleed valve, if the
bank bleed valve can not work, then slowly loosen the
valve screw, when there is gas vented, stop rotate the
wrench, after all gas vented, then totally loose the screw.
6.18.4 Replace the bank bleed valve on 2
regulator.
6.18.5 Close all cylinders on side of manifold where 1
stage pressure regulator will be repaired.
NOTE - Below figure shows example of bank bleed valve
on the left 1 stage regulator maintenance, mirror to
st
opposite side for working on the right bank.
Intermediate
Isolation Valve
Bank bleed
valve
nd
6.18.6 Rotate the ball valve handle on side after the 1
stage pressure regulator to isolate the 1
regulator as shown in Figure 37.
6.18.7 Depressurized the gas pressure inside the 1
stage regulator by pressing the bank bleed valve, if the
bank bleed valve can not work, then slowly loose the
valve screw, when there is gas vented, stop rotate the
wrench, after all gas vented, then totally loosen the
screw.
6.18.8 Replace the bank bleed valve on 1
regulator.
51
Stage Regulator.
nd
stage
nd
stage pressure
st
stage
st
4109992459.00
nd
st
st
st