Installation Manual, Maintenance and Operation
Pressure Regulating Valve – Model Horus
MI-18
Elaborate
Verified / Approved
CSQ
Date
Review
Page
J.Junior
Celso Nieto
JM
25/11/16 04
4 de 32
1.2.3 – OPERATION
Depending on the type of regulator, the valve may even be positioned fully open. Consequently, when a regulator put in
operation, the shutoff valves should be opened slowly so that the regulator valve can assume its regulating position. If the
valves are quickly opened the upstream pressure can pass downstream through the regulator and over-pressurize
downstream the main line.
All regulators, etc., should operate with the spring adjustment specified by the manufacturer. This is especially important
when operating relief valve or shutoff valves, since incorrect springs may prevent the relief valve to open and close the
shutoff valve.
Precautions should be taken to prevent water from entering through the openings for breathing and ventilation.
1.2.4 – MAINTENANCE
Regulators and valves contain gases at pressures that are sometimes greater than atmospheric pressure. Before trying
to investigate any problem or perform maintenance work on equipment, they must be safely depressurised. Furthermore,
as most gases may be flammable, toxic, corrosive, or hazardous, it may be necessary to purge the system with an inert
gas such as nitrogen. Special precautions are necessary for operation with gases such as oxygen or hydrochloric gas and
the user must be sure that the appropriate procedures are in place.
Eventually it is not enough to isolate the high pressure device, since high pressures can be retained downstream of
isolation valves. Do not try to remove covers, plugs, etc., before this device is properly released. Still, it is wise to consider
that the high pressure gas may be present when removing covers and plugs.
Most regulators use spiral springs as a charging device. It is important to reduce the burden these springs away your
presser as possible. In some cases, there may be some cargo residue, even when the spring is relaxed within the limits of
their house.
2.0 – INTRODUCTION
2.1 SCOPE OF MANUAL
This manual aims to provide operational information, installation and maintenance of the pressure regulators model
HORUS manufactured by GASCAT.
2.2 DESCRIPTION
The pressure regulator model HORUS was designed to meet varied applications and to work with several process
service conditions. It has outstanding applications with high differential pressure combined with high process flow and high
pressure. It are typical installations with these characteristics the natural gas transportation and delivery points where
occurs custody transference. It is also common to utilize with distributor stations of natural gas and other gases non-
corrosive.
The pressure regulator HORUS is pilot operated and has axial flow what result in low noise level as well high flow
capacity. Beyond this, the double diaphragm pilots supplied with the valve allow accuracy in set pressure up to 1%.
It’s construction design meets the active (fail open) monitor (fail close) configuration.
The set of piston and seat was designed to proportionate high flow rangeability to the pressure regulator, can operate
with a maximum inlet pressure of 150 kgf/cm² and outlet pressures from 1.0 to 80.0 kgf/cm².
