Lutz Jesco C 2700-V, Operating Instructions Manual

Page: 24 / 40

Maintenance
Maintaining the inlet valve
24
Vacuum Regulator for Chlorine Gas C 2700-V
© Lutz-Jesco GmbH 2016
Operating Instructions
BA-21210-02-V05
10.4.3 Installing the inlet valve
Precondition for action:

The parts are completely dry following cleaning.

The parts are in good condition.

Wearing parts are available.
Perform the following working steps:
1. Push the valve seat (
5
) through the flange (
3
) and place the O-ring
(
2
) in the groove of the valve seat.
2. Rub a little silicone grease onto the O-ring (
6
) and place in the
groove on the valve seat (
5
).
3. Push the spring (
8
) onto the flat side of the valve cone (
7
).
4. Place the spring and valve cone in the housing (
9
). The guide rod
must hit the central drill hole.
5. Place the flange and valve seat on the valve housing (
9
). Ensure
that the O-ring (
6
) remains in the groove.
6. Align the flange (
3
) so that the pressure gauge is in the correct
position following installation of the inlet valve on the plastic part.
7. Screw in the screws (
1
) with a little fitting grease.
8. Tighten the screws crosswise to a torque of approx. 3 Nm.
9. Install the pressure gauge (
10
) and plug (
11
) with approx. 3 layers
of PTFE tape

Inlet valve installed.
10.4.4 Testing the inlet valve
Precondition for action:

The valve is completely installed.
Fig. 10-2: Test the inlet valve
Perform the following working steps:
1. Connect the valve input to nitrogen or dry compressed air and set to
pressure to approx. 10 bar.
2. Immerse the inlet valve in water. The pressure gauge must not be
immersed in water!
3. Observe the valve for a few minutes. No bubbles must ascend.
4. If there is a leak at the valve output, take the valve out of the water,
open it briefly by pressing hard on the valve rod and then repeat the
test. If it is still then not tight, either the valve seat or valve cone
must be replaced.
5. Allow the inlet valve to dry thoroughly before installing it.

Inlet valve tested.
Do not install the inlet valve on the vacuum part until the
former has been tested for leaks and after maintenance of
the vacuum part.
i
N
2
10 bar
If it is not possible to immerse the inlet valve, the test can
also be performed with soapy water, e.g., a thin coat of soapy
water is applied with a brush.
i