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It is located in the lower part of the pressure module behind the shut‐off valve – identification FI, FM and FH on
the dispenser diagram – see Appendices 3.2, 3.3 and 3.4. It is intended for filtering mechanical impurities from
the flowing media. At multi‐level systems of filling the inlet pipeline of each pressure level has its own filter. The
filter is normally maintenance‐free. Potential defects are solved by replacement. Replacement of a complete
filter may only be performed by an employee of the authorized service company.
We recommend performing inspection of the inner filter cartridge and its potential cleaning or
replacement at least
once a year.
Filter cartridge cleaning may be performed in water solution of a
detergent. After thorough drying it is advisable to blow the filter cartridge with pressurized air. Since
the disassembly and inspection of the filter cartridge is conditioned by media drainage from the
pressure module of the CNG dispenser, these activities may only be performed by an employee of the
authorized service company.
4.1.4.
CHECK VALVE
It is located in several parts of the pressure module wherever it is necessary to avoid return flow of media to the
area with currently lower pressure – BVxx identification in the dispenser diagram – see Appendices 3.2, 3.3 and
3.4. Check valves are normally maintenance‐free. Potential defects are solved by replacement. Replacement
may only be performed by an employee of the authorized service company.
4.1.5.
DISCHARGE NEEDLE VALVE
It is located in such parts of the pressure module from which the media must be discharged in
case on maintenance or service – NVxx identification in the dispenser diagram – see Appendices
3.2, 3.3 and 3.4. Discharge needle valves are normally maintenance‐free. Potential defects are solved by
replacement. Replacement may only be performed by an employee of the authorized service company.
4.1.6.
MASS METER
OCEAN CNG dispensers are equipped with premium electronic meters of mass flow.
The meter is formed by the measuring sensor itself, which works on the principle of
Coriolis force, and the microprocessor unit which, in addition to setting
measurement and calibration parameters, ensured data connection to the
electronic counter of the dispenser. The mass meter is set and adjusted by the manufacturer. Repairs and
potential changes in setting may only be performed by an expert of the authorized service company in the
presence of metrology employee who shall perform the following accuracy inspection and official verification.
CMI is obliged to regularly inspect the electronic meter based on statutory regulations.
4.1.7.
ELECTROMAGNETIC CONTROL VALVE
It is located in a part of the pressure module behind the filter, possibly behind the mass
meter – EVxx identification in the dispenser diagram – see Appendices 3.2, 3.3 and 3.4.
Electromagnetic valve opening and closing is controlled by the electronic counter of the
dispenser. Electromagnetic valves are normally maintenance‐free. Potential defects are
solved by replacement. Replacement may only be performed by an employee of the
authorized service company.
