RMG_625_00_EN_2013_04

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.