http://www.rmg.com/uploads/myth_download/RMG_873_00_GB_2007_08

SERVING THE GAS INDUSTRY WORLDWIDE

General Description

SAFETY RELIEF VALVE RMG 873

RMG REGEL + MESSTECHNIK GMBH

SAFETY RELIEF VALVE RMG 873 Application, Characteristics, Technical Data

Application • for venting gas leakages • for offtake stations in gas transmission and distributing systems, for industrial and power plant supply • suitable for natural gas according to DVGW G 260, other gases on request Characteristics

2

• direct acting, spring loaded, with proportional opening characteristic • safe operation • high response accuracy • no vent line needed • simple maintenance

TECHNICAL DATA max. operating pressure PS

100 bar • solderless pipe connection with cutting ring to DIN 2353, for pipe outer diameter inlet:

connections

12 mm / outlet: 20 mm, 25 mm

response precision catego-

10 bar to 25 bar

AG 2,5

ries

≥ 25 bar to 100 bar

AG 1

valve seat diameter

24 mm

smallest flow diameter

8 mm

venting of the spring housing

internal, via the outlet connection

material

body parts

aluminium alloy, copper-zinc alloy

internal parts

aluminium alloy, copper-zinc alloy

valve sealing disc

plastic material

sealings

NBR

temperature range

-20°C to +60°C

function and strength

acc. to DIN EN 334

DIN-DVGW-Reg.-No.

NG-4305AT0376

CE-sign to PED

TÜV-component testing

acc. to AD-leaflet A2 and Vd TÜV-leaflet

SAFETY RELIEF VALVE RMG 873 Dimensions, Design and Operation

The safety relief valve (SBV) RMG 873 is designed to protect station parts from exceedingly high pressure. It consists of the pressure retaining body parts and the internal parts important for function. The pressure to be controlled takes eect on the comparator designed as a valve plate. If the pressure in the system exceeds the value pre-determined by the setpoint spring, the valve opens and the gas is discharged via the outlet connection. If the pressure to be controlled falls below the response pressure (adjusted value), the valve closes automatically. The closing spring of the moving valve sleeve prevents an overcharge of the valve sealing disc, should the pressure to be controlled fall below a certain value. Then the force of the pre-tensioned setpoint spring is compensated by the body via the piston. In order to avoid unwanted changes in the setpoint, the adjusting screw is countered. A sealed protection cap prevents unpermitted setpoint alterations.

95

piston valve sleeve 100

closing spring relief-line connection

260

valvesealing disc setpoint spring setpoint adjuster protection cap

60 Type Description (example):

RMG 873 - E12 / E20 - F1

Type RMG 873 connection inlet E12 connection outlet E20/E25 E20 / E25 setpoint spring

response pressure

F1 F2

10 to 50 bar 40 to 100 bar

3

SERVING THE GAS INDUSTRY WORLDWIDE

RMG is your worldwide partner for gas control equipment, ranging from exploration to consumer supply. The comprehensive range of RMG products and systems provides you with a total solution for all your gas control and measurement needs. Modern manufacturing techniques combined with our expertise and specialist knowledge in

the design and build of gas control equipment, including fully automated stations has earned RMG a worldwide reputation for supply of safe, accurate and reliable equipment.

RMG ... Welcomes the opportunity to meet your business requirements.

WWW.RMG.COM

GERMANY RMG REGEL + MESSTECHNIK GMBH Osterholzstraße 45 34123 Kassel Phone +49 (0)561. 5007-0 Fax +49 (0)561. 5007-107

WÄGA WÄRME-GASTECHNIK GMBH Osterholzstraße 45 34123 Kassel Phone +49 (0)561. 5007-0 Fax +49 (0)561. 5007-207

RMG MESSTECHNIK GMBH Otto-Hahn-Straße 5 35510 Butzbach Phone +49 (0)6033. 897-0 Fax +49 (0)6033. 897-130 Works Ebersberg: - Software development Anzinger Straße 5 85560 Ebersberg Phone +49 (0)8092. 20 97-0 Fax +49 (0)8092. 20 97-10

RMG-GASELAN Regel + Meßtechnik GmbH Julius-Pintsch-Ring 3 15517 Fürstenwalde Phone +49 (0)3361. 356-60 Fax +49 (0)3361. 356-836

ENGLAND

CANADA

BRYAN DONKIN RMG GAS CONTROLS LTD. Enterprise Drive, Holmewood Chesterfield S42 5UZ, England Phone +44. 12 46 501-501 Fax +44. 12 46 501-500

BRYAN DONKIN RMG CANADA LTD. 50 Clarke Street South, Woodstock Ontario N4S 7Y5, Canada Phone +1. 519 53 98 531 Fax +1. 519 53 73 339

POLAND GAZOMET SP. Z O.O. ul. Sarnowska 2 63-900 Rawicz, Polen Phone +48. 65 546 24 01 Fax +48. 65 546 24 08

We reserve the right for technical changes!

Edition 08/2007

Safety Relief Valve RMG 873