72
Gas Pressure Regulator
with Safety Diaphragm,
Inlet Pressure Compensator, Zero Lock
Installation and Adjustment
Setpoint adjustment
The setpoint will be adjusted by selec-
ting the desired range of the setpoint
spring and adjusting the setting spring
accordingly. The layout of ranges is
according to the spring configuration.
Instrument line
It will not be necessary to reposition the
instrument line because the controller is
equipped with an internal pulse sensor
as a standard feature.
Inlet pressure variations
Any variations between the minimum
and maximum inlet pressure levels will
be compensated for by the compensa-
tor diaphragm to avoid outlet pressure
variations.
Installation
Prior to installation check that the con-
necting lines and regulators are free of
dirt. Dirt-carrying gas may cause
damage to the seat and cone of the
regulator. For the installation take care
to observe the direction of the arrow.
Hold regulators with threaded connec-
tions only by means of suitable tools
engaging the surfaces intended for this
purpose. For the connection of flanged
joints take care to tighten the bolts by
even amounts all around.
Control and start-up
With the setpoint setting known to be in
its correct position:
Proceed with slowly opening the stop
valve upstream of the regulator. Then
turn on the gas-consuming equipment.
Depending on the mounting position it
might be necessary to slightly readjust
the pressure (turning the setpoint set-
ting screw clockwise or counterclock-
wise will increase or decrease the
pressure, respectively).
With the setpoint setting not known or in
its incorrect position:
Proceed with fully relieving the setpoint
spring of load (turning counterclock-
wise); open the stop valve slowly and
cautiously; set the desired setpoint to
an approximate position with the gas-
consuming equipment not turned on
and proceed with the exact setpoint set-
ting at nominal load. If the setting range
of the setpoint spring is not sufficient,
select the correct spring from the table
of springs.
Maintenance
The gas pressure regulator is mainte-
nance free. Dirt-carrying gas may howe-
ver necessitate an occasional cleaning
of the unit. In case of a failure of the
working, safety or compensating dia-
phragms due to the impact of excessi-
vely high pressure it will be necessary
to order a new measuring element for
the particular type (all functional parts of
the regulator available as a kit).
1
Housing bottom
2
Regulator seat
3
Regulator sealing
4
Regulator disk
5
Bottom spacer sleeve
6
Compensating diaphragm
7
Top spacer sleeve
8
Override tube
9
Working diaphragm
10
Safety diaphragm
11
Diaphragm disk
12
Setting pressure spring
13
Screw
14
Screw plug
15
Adjusting screw
16
Screw cap
17
Position indicator for
DN 40/DN 150
18
Cover
19
Bottom cover
20
R1/4" thread on either side of
inlet pressure chamber for
inserting the test socket
21
Leakage gas connection
R 1/4" for DN15/DN25 (R 1/2"/R
1") R1/2" for DN 40/DN150
22
Diaphragm cup
23
Diaphragm plate
