Installation, Operation and Maintenance Manual
Pressure Regulating Valve – Model Ares N
MI–42
Prepared by
Verified by/ Approved by
CSQ
Date
Revision
Page
José Junior
Vanízio Lizo
Jamerson
24/03/17
02
15 of 21
5.0 TROUBLE SHOOTING
This section of the manual aims to evidence eventual troubles that may occur in the field to their causes.
The problems listed in this section may derive from different situations, but most of them are related to the gas
conditions (impurities), natural wear, and fault during the equipment operation.
It is important to keep in mind that the operation and maintenance of GASCAT equipment should only be
performed by highly skilled and trained personnel, preferably by teams trained by GASCAT’s instructors.
For training and qualification of operators and technicians, please, contact GASCAT through the e-mails below, to
check on their availability.
E-mail:
/
PROBLEM
PROBABLE CAUSE
CORRECTIVE MEASURES
Outlet pressure decreasing
Saturated filter element
Insufficient flow
Check the filter and clean the filter
element
Outlet pressure increasing
Direct Gas passage through the
valve
Presence of particles
between seat and shutter
Release the screws of intermediary
body and remove the regulator of
the body valve.
Check shutter and seat.
Clean or change the parts.
Gas passage through the vent
Diaphragm rupture or
presence of particles in
the relief set
Release slowly the regulating screw
and remove the spring.
Release the cover screws, remove
the diaphragm and clean or change
it.
Slam shut valve blocking
Outlet pressure gradual
increasing
Direct gas passage
through the valve
Check the slam shut seat; change
it. Fix the seat in the body, remove
the excess of grase.
Check shaft o'rings and change it if
necessary
Check the slam valve shutter and
change it if necessary
6.0 MAINTENANCE
It is essential to perform preventive maintenance of pressure regulators' model URANO for proper operation of the
equipment over time, and it is directly related to the reliability of the pressure control system, avoiding operating problems
to the user.
The frequency of maintenance varies considerably according to the installation, operating conditions and the quality
of the fluid in question, for example, if the equipment is subject to a large presence of contaminants such as black
powder, yellow powder, oil, condensate, etc. certainly the service intervals should be shorter.