Pilot RMG 625
Product information
serving the gas industry worldwide
Pilot RMG 625 Application, characteristics
Application • Pilot for the gas pressure regulator RMG 402 • Pilot for outlet pressure control • Suitable for gases in accordance with DVGW Worksheet G 260 and neutral, non-aggressive gases; other gases on request Characteristics
2
• External, two-stage pilot • Compact design • Integrated load limiting stage with loading pressure gauge • Integrated fine mesh filter • Easy installation, maintenance and accessibility thanks to external arrangement of the pilot • Easy setpoint spring replacement • Very easy to maintain, few wear parts • Changing of the pilot amplification through load limiting pressure, setpoint spring, inlet valve (if necessary) • High regulating accuracy due to upstream load limiting stage • Large setting range • Low closing pressure
Pilot RMG 625 Technical data Technical data Version
With integral overpressure protection (IS)
Max. permissible pressure PS
25 bar
Max. inlet pressure pu max
25 bar Setpoint spring
Measuring unit
Version
LP measuring unit
HP measuring unit
Wire Ø in mm
Colour coding
Specific set range Wds
1
2.5
cream white
0.02 bar to 0.06 bar
2
3.5
green
0.04 bar to 0.18 bar
3
4
red
0.07 bar to 0.35 bar
4
5
blue
0.3 bar to 0.5 bar
5
4
red
0.3 bar to 1 bar
6
5
blue
0.5 bar to 2 bar
7
5.5
no colour
1 bar to 3.5 bar
8
6
silver
2 bar to 5 bar
AC
SG
10
30
> 0.03 bar to 2.5 bar
5
10
> 2.5 bar to 5 bar
1
10
Spring no.
Output pressure range pd Accuracy class AC and closing pressure group SG
Class of closing pressure zone SZ
Material
0.02 bar to 0.03 bar
SZ 2.5 Body parts
Aluminium alloy
Diaphragms, sealing rings
NBR
Internal parts
Steel, Al alloy
Ambient and operating temperature range (DIN EN 334)
Class 2: – 20 °C to + 60 °C
Strength – leak tightness – functionality
In accordance with DIN EN 334
CE mark in accordance with PED
8 • PED (DGRL) Type approval test according to
• GAD (GGRL) as a component for gas consumption devices In combination with the gas pressure regulator RMG 402 pending. According to DIN EN 334, the pilot is a component of this device. All mechanical components of this device are without potential ignition sources and / or
Explosion protection
hot faces. They are not subject to ATEX 95 (94/9/EC). All electronic accessories, on the other hand, meet ATEX requirements.
3
Pilot RMG 625 Design and mode of operation Auxiliary pressure gauge
Pilot control stage setpoint adjuster Setpoint spring Pilot stage
4
Vent line connection
Measuring diaphragm assembly Measuring line connection
Discharge line connection
Fine mesh filter
Inlet valve
Inlet pressure line connection
Loading pressure line connection
Vent line connection
Inlet pressure Outlet pressure Load limiting pressure Loading pressure Atmosphere
Load limiting stage
Load limiting stage setpoint adjuster
The pilot RMG 625, together with the main valve (e.g. RMG 402), has the task of keeping the outlet pressure of a station at a constant level within predefined limits – regardless of changes in gas consumption and changes in the inlet pressure. Depending on the setting range, the pilot RMG 625 is provided in a High Pressure (HP) or Low Pressure (LP) design. In this connection, only the measuring units of the pilot control stages differ in their sizes/dimensions; the (general) layout, however, is the same. The pilot is comprised of a pilot control stage, the load limiting stage, the inlet valve and a fine mesh filter unit for protection against particles (dirt) from the inlet pressure line. All components are integrated in the compact pilot.
Pilot RMG 625 Design and mode of operation The outlet pressure to be regulated is guided over the measuring line to the pilot control stage and compared with the setpoint value specified as a force acting on the setpoint spring. Any deviation leads to a corresponding change of the distance between the nozzle and the baffle plate and to a change of the downstream loading pressure via the use of the proportional range of the load limiting stage. With the throttling diaphragm, the valve opening of the main valve is changed relative to the comparison of the outlet pressure to the setpoint. The load limiting stage provides a load limiting pressure for the amplification adjustment of the regulator. With the adjustable load limiting pressure, the setpoint spring and the adjustable inlet valve, the pilot can be adapted to the conditions of the regulating line. The construction and mode of operation of the load limiting stage correspond to the pilot control stage. At zero drop the amplifying valves of the pilot control stage and load limiting stage are closed. The loading pressure corresponds to the inlet pressure, and the main valve, e.g. RMG 402, is also closed. The closing pressure of the gas regulator (GDR) is generated by the pilot. For the opening process, the loading pressure is decreased by the nozzle/baffle-plate systems of the load limiting stage and pilot control stage and flows into the outlet pressure chamber.
Application example: RMG 402 with outlet expansion and RMG 625
Pilot RMG 625
Setpoint adjuster Setpoint spring Inlet valve
Pilot stage Fine mesh filter
Measuring line
Pressure stage
Loading pressure line
Start-up valve
Discharge line Throttling diaphragm
Closing spring
Main valve RMG 402
Foamed materials
Inlet pressure Outlet pressure Load limiting pressure Loading pressure Atmosphere
Flow diagram of the gas pressure regulator RMG 402 with RMG 625
5
Pilot RMG 625 Dimensions, weight and connections A
A
26,5
26,5
3
14
25
26,5
70,5
4
25 70,5
14 24,5
39 49,5
2
25
ca.124
26,5
3
1
24,5
ca.135 25
ca. 345
6
B
5
4
3 3 26,5
26,5
70
Dimensions and weights Version
Dimensions in mm
Weight in kg
A
B
LP measuring unit
Ø 170
approx. 206
approx. 5.3
HP measuring unit
Ø 115
approx. 178
approx. 4.2
Connection Description
Line
Pipe connection according to DIN EN ISO 8434-1 (DIN 2353) for pipe sizes
1
Measuring line connection
at outlet pressure pd
Ø 12, M 14 x 1.5
2
Discharge line connection
at outlet pressure pd
Ø 12, M 14 x 1.5
3
Vent line connection
to atmosphere
Ø 12, M 14 x 1.5
4
Inlet pressure line connection
at inlet pressure pu
Ø 10, M 14 x 1.5
5
Loading pressure line connection
at main valve
Ø 10, M 14 x 1.5
Item
70
Pilot RMG 625 Device designation
Special design
7
Type of pilot
RMG 625
Version Low Pressure
LP
High Pressure
PS
Specific outlet pressure range Wds in bar
Setpoint spring no.
LP measuring unit
0.02 bar to 0.06 bar
1
0.04 bar to 0.18 bar
2
0.07 bar to 0.35 bar
3
0.3 bar to 0.5 bar
4
HP measuring unit
Setpoint adjusting screw of the control stage
Version
Setpoint spring no.
Type Type of pilot
Version
RMG 625 - LP - 3 - So
Example:
0.3 bar to 1 bar
5
0.5 bar to 2 bar
6
1 bar to 3.5 bar
7
2 bar to 5 bar
8
Special design Special design (must be explained in more detail)
So
More information You want to know more about the solutions RMG can offer to the gas industry? Talk to your local contact. Or visit our website www.rmg.com GERMANY
CANADA
Honeywell Process Solutions
Honeywell Process Solutions
RMG Regel + Messtechnik GmbH
Bryan Donkin RMG Canada Ltd.
Osterholzstrasse 45
50 Clarke Street South, Woodstock
34123 Kassel, Germany
Ontario N4S 0A8, Canada
Phone: +49 (0)561 5007-0
Phone: +1 (0)519 5398531
Fax:
+49 (0)561 5007-107
Fax:
Honeywell Process Solutions
USA
RMG Messtechnik GmbH
Honeywell Process Solutions
Otto-Hahn-Strasse 5
Mercury Instruments LLC
35510 Butzbach, Germany
3940 Virginia Avenue
Phone: +49 (0)6033 897-0
Cincinnati, Ohio 45227, USA
Fax:
Phone: +1 (0)513 272-1111
+49 (0)6033 897-130
Fax:
+1 (0)519 5373339
+1 (0)513 272-0211
Honeywell Process Solutions RMG Gaselan Regel + Messtechnik GmbH
TURKEY
Julius-Pintsch-Ring 3
Honeywell Process Solutions
15517 Fürstenwalde, Germany
RMG GAZ KONT. SIS. ITH. IHR. LTD. STI.
Phone: +49 (0)3361 356-60
Baskent OSB, Ataturk Bulvari 19.cadde No:56
Fax:
Malıköy-Temelli-Sincan
+49 (0)3361 356-836
ANKARA – Turkey Honeywell Process Solutions
Phone: +90 312 278 10 80 - 119
WÄGA Wärme-Gastechnik GmbH
Fax:
+90 312 278 28 23
Osterholzstrasse 45 34123 Kassel, Germany Phone: +49 (0)561 5007-0 Fax:
+49 (0)561 5007-207
ENGLAND Honeywell Process Solutions Bryan Donkin RMG Gas Controls Ltd. Enterprise Drive, Holmewood Chesterfield S42 5UZ, England Phone: +44 (0)1246 501-501 Fax:
+44 (0)1246 501-500
RMG 625.00 2013-04 © 2013 Honeywell International Inc.