Installation, operation and maintenance manual
Page 3 of 4
2 INSTALLATION
The RPG-HC4 regulators are arranged on top of a hydrophore tank by means of flanges that are connected to
pipes that directs incoming gas into the upper part of the tank. The gas is supplied to each RPG-HC4 regulator
by means of fittings with 1" NPT threads.
Importance notice regarding operational use:
Due to the fact that these regulators have extreme capacity, the downstream pipe run for each RPG-HC4
connection must never be blocked.
The regulator shall be put in operation by slow opening of the shut-off valves that are connected upstream each
RPG-HC4.
Optimal function of the RPG-HC4 is obtained when the downstream pressure is higher or equal to pre-set level.
The regulator is then in the closed position. If pressure in the AHS drops below set pressure, the regulator will
respond almost instantly and open for air supply to sustain the set pressure.
It shall not be necessary to change the terms of RPG-HC4 during operation. When something indicates that
RPG-HC4 has a malfunction, contact OBS Technology AS for service.
3 MAINTENANCE
No maintenance performed at site. We recommended that each RPG-HC4 unit that are in operational use
should be sent to OBS Technology AS for maintenance first time after 18 months, then every third year.
NB! Use the original aluminum box for transport to prevent damage to the o-ring against the flange.
NB! Adjustments on the RPG-HC4 should be done at OBS’s premises. Special test facilities are required to
do adjustments and verify proper function. Tampering by un-authorized personnel can cause hazardous
flow conditions that can harm the firewater system as well as personnel.
The service will include the following steps:
Testing in rig prior to disassembly
Maintenance incl. complete disassembly, cleaning and inspection of all
parts, replacement of all O-rings and Pilot Valve (art.no01-00378).
OBS-P06-KA-000157
Final test RPG-HC4 (functional testing in the test rig)
