73
Gas Pressure Regulator
with Integrated Safety Valve
Installation and Adjustment
The gas pressure regulator has been
designed to ensure a constant outlet
pressure with fluctuating inlet pressure
and varying consumption rates.
It is especially used for applications
requiring very short response times,
e.g. in the feed line to burner systems,
industrial furnaces, etc.
The gas pressure regulator is installed
by the exclusive use of spring-loaded
mountings so that it can be arranged in
any desired position. A common hou-
sing accommodates the gas pressure
regulator and a safety shut-off valve
which is set to stop the gas supply in
case of overpressure and/or lack of
pressure.
Installation
The gas pressure regulator must be
installed with the arrow pointing in the
direction of the gas flow. Two instrument
lines must be fitted, one to the bottom
diaphragm cup of the regulator part and
one to the upper diaphragm cover of the
safety shut-off valve (approx. 10 D
downstream of the control unit). These
lines should be of steel type with an out-
side diameter of 12 mm. The Ermeto
self-sealing couplings are provided by
the manufacturer.
Taking into operation
Open the gas shut-off valve very slowly.
Watch the outlet pressure on the pres-
sure gauge and readjust the load spring
if required. Take care for adjustment
that the gas is not flowing because
otherwise the closing pressure will be
added to the measured result.
Operation
The gas will flow through the regulator
housing in the direction of the arrow.
The main diaphragm will be charged
with pressure to the outlet side from the
bottom via an instrument line. The load
spring is preset to the desired outlet
pressure. The single-seat valve is
directly hung and isolated from the inlet
pressure by an intermediate diaphragm.
The diaphragm of the safety shut-off
valve is charged with outlet pressure via
an instrument line. Overpressure and/or
lack of pressure will cause the measu-
ring element to lift or lower. This will
actuate the tripping mechanism with the
closing spring pressing the valve disk
against the valve seat.
1
Setting screw
2
Load spring
3
Main diaphragm
4
Vent opening R 3/8"
5
Instrument connection R 3/8"
6
Inlet pressure compensating
diaphragm
7
Valve seat
8
Valve sealing
9
Closing cover
10
Instrument connection R 1/4"
11
Vent opening
12
Inlet pressure compensating valv
13
Safety shut-off valve seat
14
Valve sealing
15
Closing spring
16
Safety shut-off valve diaphragm
17
Maximum spring
18
Setting screw
19
Pull knob