Installation and Operation Manual
Domus HF - Pressure Regulating Valve
MI-23
Elaborado
Verificado / Aprovado
CSQ
Data
Revisão
Página
JJ
VBL
JM
15/12/17
00
5 de 19
Most regulators use spiral springs as the loading device. It is important to reduce the load of these springs relieving
their loaders as much as possible. In some cases, some residual load may last, even though the spring is relaxed to the
limits of its housing.
There is not a recommendation about the frequency to change the repair kit due several different variables in the
process that changes installation by installation as, for example, process gas quality, service conditions etc. The repair kit
should be changed when the regulator has problems during operation, as leakage, increase in set pressure and also
others that become the quality and regulator performance different.
However, Gascat recommends that after all regulators opening during maintenance service the repair kit must be
changed. It is also indicated to change a complete repair kit and not only specific part (example o’ring, shutter), to have the
all spare parts with same life time.
Gascat already inform to avoid all non original and genuine parts.
2 – INTRODUCTION
2.1 – SCOPE OF MANUAL
This Instruction manual has as objective supply information about operation, installation and maintenance about
DOMUS HF pressure regulator manufactured by GASCAT.
2.2 – DESCRIPTION
Domus HF pressure regulating valve was designed by Gascat’s Engineering to high inlet pressure up to 103 bar (1500
psig) whitout other need of orifice changing because of the balancing internals.
2.3 – SPECIFICATIONS
2.3.1 – AVAILABLE CONFIGURATIONS
DOMUS HF SC: Pilot operated pressure regulator spring to close (fail close).
DOMUS HF pressure regulators are classified as SC in accordance with standard DIN EN 334 directives, for fail
condition.
2.3.2 – AVAILABLE CONNECTIONS
ND
FLANGE
ASME B16.5
FLANGE DIN
2633
THREAD
1”
150#/300#/600# PN 16/25/40
NPT-F
2”
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