Madas FM Manual Del Usaurio página 14

10.0 - DIFFERENTIAL PRESSURE GAUGE CLOGGING INDICATOR
10.1 - DESCRIPTION
The differential pressure gauge used to point the clogging degree of the cartridge filters.
It is equipped of adjust maximum index (red arrow) able to supply the best ∆P value occurred.
Can be supplied already mounted ONLY on the filter FGM series (as in figure 6 and 7) or as accessory to be mounted later.
Generally it is supplied (on request) mounted on filters as indicated in fig. 6, namely:
• arrow on the filter body left to right;
• readable dial frontally;
• + mark on the back left
It is possible to supply it even as stated in in fig. 7 (reverse type "R"), namely:
• arrow on the filter body left to right;
• readable dial from the back;
• + mark on the left (in this case the marks + and – are specified with proper labels).
Both versions can be supplied with a built in proximity sensor too to transmit a maximum differential pressure signal from
remote ( "S" type).
The sensore is normally open type and supplies a signal when the ∆P pointer reaches 100 mbar point.
Different settings on request.
10.2 - INSTALLATION
If the differential pressure gauge is supplied as accessory it is necessary to close the gas before installation.
We suggest the pressure gauge installation on filters with premounting connections then with 2 G 1/8 threaded holes (distance
between them 55 mm) already present on the cover (see fig. 6 and 7).
If the filter do not have this premounting connections you must do a connection as show in fig. 8 using pipes and/or connections
having matching threads with the connection to be connected and suitable for gas use.
The filter on which the pressure gauge have to be mount must be equipe at least with an inlet and outlet pressure test point.
After mounting make a working and a leak test.
Once the filter is mounted, before the plant start up, reset the red arrow.
Check the ∆P with new filter and with flow in the plant.
We recommend replacing the cartridge when the differential pressure is doubled comparing the original value obtained with
new filter.
10.3 - TECHNICAL DATA
• Gauge P. max: 20 bar
• Standard maximum ∆P: 150 mbar (different ∆P on request)
• Environment temperature: -40 ÷ +60 °C
Proximity sensor features
• Maximum voltage: 30 Vdc
• Maximum power: 100 mA
• Protection degree: IP55
• Protection way: EEx ia IIC T6
• Cable length: 2 m
FM-FGM
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Madas Technical Manual - REV. 0 of 10 Oct 2018
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