7.4 Cleaning the inert gas valve
4
3
2
1
5
6
7
11
10
10
8
9
b
a
lli
g
/
co
n
ve
x
Fig. 17:
Valve with inert 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 mm, WAF 5 mm
● Open-end wrench, 14 mm WAF
● Circlip pliers J1
● Calibrated torque wrench (tightening factor ≤ 2.5)
Dismantling the valve
1. Dismantle the hose from the inert 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 the parts - especially the bores in the valve housing.
9. Replace the parts according to the spare parts pack.
Assembling the valve
1. Determine the curve of the valve flap and place the valve flap in the screw cap with the curved
side facing downwards.
2. Screw the screw cap and the valve housing hand tight.
3. Observe the
assembly sequence
.
4. First fit the G 1/8" hose connection on the valve housing.
– Tightening torque:
3.0 Nm
.
5. Slide the O-ring over the screw cap up to the stop.
6. This must be performed before screwing the valve housing onto the vacuum pump in order to
avoid shearing the Allen head screws.
7. Tighten the screws.
– Tightening torque:
1.0 Nm
.
8. Fit the spindle in the valve housing.
9. Insert the circlip.
Maintenance
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