/RMG_324_00_Gb_2011_02

Zero-pressure gas regulator RMG 324

Product Information

Serving the Gas Industry Worldwide

Zero-pressure gas regulator RMG 324

2

Zero-pressure gas regulator RMG 324 Application, properties, technical specifications

Applications • Zero pressure control for gas-engine / gas-furnace circuits • Sequential setpoint controls • Gases accor. to DVGW working instructions G 260 (3rd family of gases only in gaseous state), sewage gas, bio gas, landfill gas, mine gas and neutral, non-aggressive gases

Characteristics

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• Very sensitive, precise control • Setpoint may be adjusted from external device • Compact design • Plug-in design for regulating assembly • Simple installation of regulating assembly • Double seat valve available with multiple apertures • High flow rates • Fitting position is horizontal with the spring dome DOWN – that way gravity controls max. underpressure • Measuring impulse connection easy to modify from outside (internally / externally) • Component for gas combustion devices according to gas appliances directive (GAD)

techniCAL datA Max. admissible pressure PS

0.5 bar

Max. inlet pressure pumax

0.5 bar

Set range Wd

-3 to +3 mbar Nominal width

Values in (m3/h) / bar

DN 65

3800

DN 80

4650

DN 100

7350

Flow rate coefficient KG*

Type of connection

Flange PN 16

Performance class of regulator (EN 88-1)

Class A

Group of regulators (EN 88-1)

2

Lock-up pressure

none

Operating temperature range (EN 334)

Class 2: -20 to +60 °C

Strength – leak proofness – functionality

Design in the style of EN 88-1, EN 334

Certificates

EC type examination certificate: CE-0085CM0015 accor. to gas appliances directive (GAD) 2009/142/EC All mechanical components of this device are without potential ignition sources

Explosion protection

and / or hot faces. They are not subject to ATEX 95 (94/9/EC).

All electronic accessories, on the other hand, meet ATEX requirements.

Materials

Main valve body

Cast aluminium alloy

Actuator body

Steel

Diaphragm

Rubber plastics (NBR)

Sealing rings

Rubber plastics (NBR)

*) for natural gas, d = 0.64 (ρn = 0.83 kg/m3), tu = 15 °C

Zero-pressure gas regulator RMG 324 Design and operation

Double seat valve Internal measuring line

4 Main valve body

Measuring diaphragm Regulating assembly

Connection (internal thread G 3/8) External measuring line

Connection for vent line (internal thread G 3/8) Threaded adapter (protecting diaphragm against damage) Setpoint spring

Inlet pressure Outlet pressure Atmosphere

Setpoint adjuster

The purpose of the RMG 324 zero-pressure gas regulator unit is to maintain the outlet pressure of a gaseous medium at a reasonably constant level independent of any disturbance variables, such as changes in inlet and / or flow rate throughout the controlled system. The reference of the unit is adjustable between -3 and +3 mbar.

The RMG 324 is composed of the main valve body on the one hand and a functional ‘controller’ unit on the other.

The latter contains the actual double seat valve. Thanks to the double seat design, the final control element of the regulating assembly is in a state of equal pressure.

There is a connecting bolt that can be removed so that the whole regulating assembly can be dismounted in one piece, while the main valve body stays in the regulating line. Maintenance is made much easier that way.

Maintenance personnel may check the functional parts visually. If they find a defect, they can exchange the whole unit against a good one and take the defective one to the repair shop.

The RMG 324 must be positively mounted with the diaphragm in a horizontal position and the setpoint adjuster DOWN. That way, the weight of the internal movable parts serves to set the max. underpressure. Using the setpoint adjuster (and setpoint spring), the reference value for the outlet pressure can be adjusted between -3 and +3 mbar. In addition to adjuster and spring, the outlet pressure to be set may also be adjusted with a second setpoint, pneumatically, from outside, via the vent line. That one will act in addition to the effect of the spring.

The outlet pressure to be controlled is fed to the controller via the (internal or external) measuring line. The measuring diaphragm detects the actual outlet pressure and compares it to the target value provided by the setpoint spring. Whenever the comparison reveals a deviation, the valve stem will act directly on the valve sleeve, thus changing the flow rate and adjusting the outlet pressure to match the reference value again.

Zero-pressure gas regulator RMG 324 Dimensions, weights, connections

A

E

B

D

b

a

Length required forF removal: F Ausbaumaß:

5

øC dimensions, weights Nominal width

Dimensions in mm A

B

DN 65

290

120

DN 80

310

120

DN 100

350

145

Weight in kg

ØC

D

E

F

432

124

630

22.5

385

435

127

650

23.0

471

145

730

27.0

connection Nominal width

Actuator size

Inlet / outlet

RE 2

Dimensions of flange connections, shape of sealing faces: PN16

DN 65 DN 80 DN 100

Measuring impulse connection

Vent line connection

a

b

G 3/8

G 3/8

Zero-pressure gas regulator RMG 324 Description

DN 80 DN 100

Regulating assembly

6

Regulating assembly

RE2

Measuring impulse connection Measuring impulse connection (internal)

ICL

Measuring impulse connection (external)

ECL

Measuring impulse connection

DN 65 Nominal width

DN 65 – RE2 – ICL Regulating assembly

Type Nominal width

–

Pipe size DN

RMG 324

Example:

Zero-pressure gas regulator RMG 324

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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

ENGLAND

Honeywell Process Solutions

Honeywell Process Solutions

RMG Regel + Messtechnik GmbH

Bryan Donkin RMG Gas Controls Ltd.

Osterholzstrasse 45

Enterprise Drive, Holmewood

34123 Kassel, Germany

Chesterfield S42 5UZ, England

Tel: +49 (0)561 5007-0

Tel: +44 (0)1246 501-501

Fax: +49 (0)561 5007-107

Fax: +44 (0)1246 501-500

Honeywell Process Solutions

CANADA

RMG Messtechnik GmbH

Honeywell Process Solutions

Otto-Hahn-Strasse 5

Bryan Donkin RMG Canada Ltd.

35510 Butzbach, Germany

50 Clarke Street South, Woodstock

Tel: +49 (0)6033 897-0

Ontario N4S 0A8, Canada

Fax: +49 (0)6033 897-130

Tel: +1 (0)519 5398531 Fax: +1 (0)519 5373339

Honeywell Process Solutions RMG Gaselan Regel + Messtechnik GmbH

USA

Julius-Pintsch-Ring 3

Honeywell Process Solutions

15517 Fürstenwalde, Germany

Mercury Instruments LLC

Tel: +49 (0)3361 356-60

3940 Virginia Avenue

Fax: +49 (0)3361 356-836

Cincinnati, Ohio 45227, USA Tel: +1 (0)513 272-1111

Honeywell Process Solutions

Fax: +1 (0)513 272-0211

WÄGA Wärme-Gastechnik GmbH Osterholzstrasse 45

TURKEY

34123 Kassel, Germany

Honeywell Process Solutions

Tel: +49 (0)561 5007-0

RMG GAZ KONT. SIS. ITH. IHR. LTD. STI.

Fax: +49 (0)561 5007-207

Birlik Sanayi Sitesi, 6.

Cd. 62. Sokak No: 7-8-9-10

POLAND

TR - Sasmaz / Ankara, Turkey

Honeywell Process Solutions

Tel: +90 (0)312 27810-80

Gazomet Sp. z o.o.

Fax: +90 (0)312 27828-23

ul. Sarnowska 2 63-900 Rawicz, Poland Tel: +48 (0)65 5462401 Fax: +48 (0)65 5462408

RMG 324.00 2011-02 © 2011 Honeywell International Inc.