Maintenance; Replacement Of The Diaphragm - Ecolab MFV PPFP050 G3/8-G5/8-21 Manuel D'utilisation

Maintenance

6.1

Replacement of the Diaphragm

1. Switch the metering pump off and empty the pressure line
Ä Chapter 4.1 'Functional Description' on page 20, section d) emptying
(see
function).
2. Loosen the casing screws (Pos. 13) and remove the valve lid (Pos. 14).
3. Remove the sealing plug (Pos. 10) on the operation button either manually or with
a small screwdriver.
4. Loosen the screw (Pos. 11) and replace the diaphragm (Pos. 15).
5. Tighten the casing screws diagonally equally (3-4 Nm).
Fig. 4: Replacement of the Diaphragm
10 sealing plug
11 screws
13 casing screws
CAUTION!
The diaphragm must be held when the screw (Pos. 11) is being loosened
due to the spring tension.
NOTICE!
The tightening torque of the valve screws must be re-tightened after 24
hours. The tightening torque is 3-4 Nm.
417101382 Rev. 07-05.2019
14 valve lid
15 diaphragm
26