Issuu on Google+

Technical Description

835.00 Edition 01/2005

Serving the Gas Industry - WORLDWIDE


We supply you with products for gas pressure regulation: RMG REGEL + MESSTECHNIK GMBH Osterholzstrasse 45, D-34123 Kassel, Germany Telephone (++49) 561 5007-0 • Fax (++49) 561 5007-107 gas pressure regulators and safety devices

RMG-GASELAN Regel + Meßtechnik GmbH Julius-Pintsch-Ring 3, D-15517 Fürstenwalde, Germany Telephone (++49) 3361 356-60 • Fax (++49) 3361 356-836 gas pressure regulating equipment, displacement meters, complete stations

Bryan Donkin RMG Gas Controls Ltd. Enterprise Drive, Holmewood, Chesterfield S42 5UZ, England Telephone (++44) 1246 501-501 • Fax (++44) 1246 501-500 gas pressure regulating equipment, below ground gas control modules

Bryan Donkin RMG Co. of Canada Ltd. 50 Clarke Street South, Woodstock, Ontario N4S 7Y5, Canada Telephone (++1) 519 5398531 • Fax (++1) 519 5373339 domestic regulators and safety devices

The other RMG Companies: RMG Messtechnik GmbH Otto-Hahn-Strasse 5, D-35510 Butzbach, Germany Telephone (++49) 6033 897-0 • Fax (++49) 6033 897-130 turbine meters, vortex meters, correctors, flow computers, odorizers

Karl Wieser GmbH Anzinger Strasse 14, D-85560 Ebersberg, Germany Telephone (++49) 8092 2097-0 • Fax (++49) 8092 2097-10

works Beindersheim Heinrich-Lanz-Strasse 9, D-67259 Beindersheim/Pfalz, Germany Telephone (++49) 6233 3762-0 • Fax (++49) 6233 3762-40 data logging, monitor systems, danger alarm systems

WÄGA Wärme-Gastechnik GmbH Osterholzstrasse 45, D-34123 Kassel, Germany Telephone (++49) 561 5007-0 • Fax (++49) 561 5007-207 design and assembly of gas pressure regulating and metering stations

ZUG GAZOMET Sp. z o.o. ul. Sarnowska 2, 63-900 Rawicz, Poland Telephone (++48) 65 546 24 01 • Fax (++48) 65 546 24 08 ball valves, accessories, gas pressure regulating and meterign stations

The RMG Group of Companies on the internet: http://www.rmg.de

Serving the Gas Industry - WORLDWIDE

We reserve the right for technical changes


RMG 835 - E 28/E28 - 25 / 2 - F5 no. of setpoint spring

0 0 0 0 0 0 0

F1 F2 F3 F4 F5 F6 F7

0.005 to 0.015 to 0.040 to 0.075 to 0.100 to 0.150 to 0.200 to

0.030 0.075 0.150 0.200 0.300 0.400 1.000

10 004 334 10 004 335 10 004 336 10 004 337 10 004 338 10 004 339 10 004 340

1 1 1 1 1 1 1

F1 F2 F3 F4 F5 F6 F7

0.200 to 0.600 0.300 to 0.800 0.400 to 2.000

10 004 338 10 004 339 10 004 340

2 2 2

F5 F6 F7

valve seat diameter

10 004 334 10 004 335 10 004 336 10 004 337 10 004 338 10 004 339 10 004 340

outlet connection

0.045 0.100 0.200 0.300 0.400 0.500 1.000

inlet connection

0.030 to 0.035 to 0.080 to 0.150 to 0.250 to 0.300 to 0.450 to

type

no. of diaphragm

4. Type Description (Example)

E 12 G 1 E 28

E 12 G 1 E 28

3 25 25

RMG-part-no. with measuring pmax 4 bar unit 0 1 or 2 1 or 2 diaphragm assembly

0

1

2

10 004 720 -

pmax 16 bar

pmax 25 bar

10 020 080 10 004 700

10 004 721

setting range in bar

RMG-part-No. for setpoint spring

7


2. Dimensions

160

192

140

RMG 835 with measuring unit 0 Connecting lines thread M 16 x 1,5, for pipe 12 x 1,5 discharge line connection thread M 16 x 1,5, for pipe 12 x 1,5

130

260

6

170

192

140

RMG 835 with measuring unit 1 or 2 measuring impulse connection thread G1, or pipe 28 x 1,5 discharge line connection thread G1, or pipe 28 x 1,5


setpoint screw setpoint spring bore for venting of diaphragm chamber

valve plate diaphragm

RMG 835 with measuring unit 1

setpoint screw setpoint spring bore for venting of diaphragm chamber

valve plate diaphragm

RMG 835 with measuring unit 2

5


3. Design and Operation The safety relief valve (SBV) RMG 835 was designed to automatically relieve a gas stream of surplus pressure, as soon as the pressure prevailing in the system to be protected rises up to the pre-set response pressure limit. The SBV closes again after the pressure in the line has fallen to the closing point. The RMG 835 is mainly used as a leakage relief valve. It is installed downstream of the gas pressure regulator in order to prevent the shut-off valve (SAV) - in its function as a main safety device - from unintended release (i.e. the gas pressure regulator gives no tight shut-off on zero flow). The pressure prevailing in the system to be monitored is fed to the lower side of the diaphragm through the measuring impulse line, whereas the force of the setpoint spring maintains on the upper side of the diaphragm. If the pressure to be monitored rises up to the pre-set response pressure limit, the diaphragm and the diaphragm plate are pushed upwards from the valve seat, so that the gas can flow into the discharge line. If the pressure falls below the response pressure limit, the SBV will close completely tight again as soon as the pressure is lowered to on the closing pressure level (approx. 0.9 x response pressure). The spring chamber is connected with the discharge line through a bore in the valve plate, so that the installation of a separate vent line is not necessary.

setpoint screw setpoint spring

bore for venting of diaphragm chamber valve plate valve seat diaphragm

RMG 835 with measuring unit 0

4


adjustable range (in bar)

response precision category

setpoint spring No. colour

measuring unit 0

measuring unit 1

1

grey

0.030 to 0.045

0.005 to 0.030

2

yellow

0.035 to 0.100

0.015 to 0.075

3

ivory

0.080 to 0.200

0.040 to 0.150

4

bright red

0.150 to 0.300

0.075 to 0.200

5

green

0.250 to 0.400

0.100 to 0.300

0.200 to 0.600

6

light blue

0.300 to 0.500

0.150 to 0.400

0.300 to 0.800

7

dark blue

0.450 to 1.000

0.200 to 1.000

0.400 to 2.000

measuring unit 0

AG 5

measuring unit 2

for pa < 0.050 bar

AG 2.5 for 0.050 < pa < 0.100 bar AG 1 measuring unit 1

for pa > 0.100 bar

AG 10

for pa < 0.050 bar

AG 5

for 0.050 < pa < 0.100 bar

AG 2.5 for pa > 0.100 bar measuring unit 2

AG 5

for pa < 0.400 bar

AG 2.5 for pa â&#x2030;Ľ 0.400 bar

3


Application • as leakage relief valve (SBV) in gas pressure regulating stations • for natural gas and all non-corrosive gaseous media

Advantages • simple design and easy mainteneance • can be mounted in any position • safe operation • high respose accuracy

1. Technical Data

2

Max. operating pressure pmax

up to 25 bar

setting ranges

0.030 bar to 2.0 bar

valve seat diameter

- measuring unit 0: 3 mm - measuring unit 1 and 2: 25 mm

connections

PN 4- internal thread G 1 PN 16 and PN 25 - screw connections without brazing to DIN 2353, for outside pipe dia. 12 mm (measuring unit 0), for outside pipe dia. 28 mm (measuring unit 1 and 2)

venting of spring chamber

as a leakage relief valve : internal venting through discharge line as a main safety device: seperate connection of vent line with outside pipe dia.12 mm

materials

main valve spring housing diaphragm valve sealing

ambient temperature

-15C to +60C

function and strength

acc. to DIN 3381

CE and DIN-DVGW

approved

forged aluminium alloy / cast aluminium alloy steel NBR FKM


http://www.rmg.com/uploads/myth_download/835_00_gb_0501