15
IT
EN
FR
ES
Madas Technical Manual
- REV. 0 of 10
th
May 2018
RG/2M - FRG/2M
Filter element guides
Filter element guides
The filter element must be
placed inside these guides
The filter element must be
placed inside these guides
fig. a:
DN 15 ÷ DN 50 cover without bottom cover
fig. b:
DN 65 ÷ DN 100 cover without bottom cover
5.0 - MAINTENANCE
• Before carrying out any dismantling operation on the device, make sure that there is no pressurised gas inside.
Check the condition of the filtering element (21) as follows
• Loosen the fastening screws (
17
) and very carefully remove the bottom cover (
16
) from the body (
11
);
• Extract the filter element and check its conditions. Blow it and clean it and, if necessary, replace it (see figures “a” and “b”
below for the positioning);
• Check the conditions of the sealing O-Ring of the bottom cover (
16
) and replace if necessary;
• Make sure the sealing O-Ring (
18
) of the bottom cover (
16
) is inside the relevant groove before putting it back on;
• Reassemble the bottom cover (
16
) and secure it in its original position, being very careful not to “pinch” or damage the
O-ring
during
tightening.
IMPORTANT:
1. for DN 15 ÷ DN 50 connections make sure that the centre pin (
10
) is centred in the guide of the bottom cover (
16
);
2. for DN 65 - DN 80 - DN 100 connections pay attention to the Teflon split ring (
14
): when reassembling the bottom
cover (
16
) it must be placed inside the specific guide (as shown in figure 6);
• Tighten the screws gradually, following a “cross” pattern, until the torque (tolerance -15%) indicated in table 2 on page 39
is reached. Use a calibrated torque wrench to do this.
• Check the body/cover seal;
NOTE
: for internal inspections, it is recommended to:
• Also check the obturator’s integrity and, if necessary, replace the rubber seal (
15
);
• Replace the seals before reassembling.
• It is recommended to contact the Technical Department to check or replace the membranes.
