12. Install the complete valve with O-ring in the vacuum pump.
13. Tighten the countersunk head screws (2x).
– Tightening torque:
1.0 Nm
.
7.6 Clean the gas ballast valve, corrosive gas version
4
3
2
1
5
6
7
11
10
10
8
9
b
a
lli
g
/
co
n
ve
x
Fig. 16:
Gas ballast valve with flushing gas connection
1 Circlip
7
Screw (2×)
2 Spindle
8
O-ring
3 O-ring (2x)
9
Hose connection
4 O-ring
10
Screw cap
5 Valve housing
11
O-ring
6 Valve flap
Required tools
● Allen key,
WAF 2.5
● Allen key,
WAF 5
● Open-end wrench,
WAF 14
● Circlip pliers,
J1
● Calibrated torque wrench (tightening factor ≤ 2.5)
Remove the gas ballast valve with flushing gas connection
1. Dismantle the hose from the flushing gas supply line.
2. Disconnect the valve housing from the vacuum pump.
– Be careful with the O-ring.
3. Unscrew the hose connection the from valve housing.
4. Unscrew the screw cap from the valve housing.
5. Remove the valve flap.
6. Dismantle the circlip using the circlip pliers.
7. Screw the spindle out of the valve housing.
– Be careful with the O-rings.
8. Clean all parts.
– Clean especially the bores in the valve housing.
9. Replace the parts according to the spare parts pack.
Assembly sequence
Observe the assembly sequence in order to prevent the Allen head screw from shearing:
1. Hose connection G 1/8" on the valve housing
2. Valve housing on the vacuum pump
Maintenance
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