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Gas Mixer RMG 980

General Description

980.00 edition 04/1998

Serving the Gas Industry - WORLDWIDE

Gas Mixer RMG 980

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Gas Mixer RMG 980 Application • mixing of combustible gas and sucked-in air for gas motors • mixing of any types of non-corrosive gases (example: for increasing the calorific value of gases, i.e. sewerage gas) Characteristics • simple design • variable mixing rate via mixing gap • instantaneous mixing (Venturi principle) • turbulent mixing (homogenizing) • linear characteristic curve

Technical data max. operating pressure

pzul 0,1 bar

gas mixing ratio

3,5 : 1 to 25 : 1

max. flow ratio

approx. 20 : 1

material

body: aluminium alloy internal parts: aluminium alloy, steel

ambient temperature

up to +80 °C

3

Gas Mixer RMG 980 Measurements:

pressure connection

E 10 - M14 x 1,5

4

Gas Mixer RMG 980 All measurements in mm

size

ØA

B

ØC

D

ØE

ØF

G

RMG 980- 70/35

70

15

108

100

35

85

M6, 12 deep

RMG 980-100/50

100

23

129

104

50

104,8

M8, 16 deep

RMG 980-140/65

140

30

160

120

65

133,6

M8, 16 deep

RMG 980- 200/100

200/206

23

220

161

100

178

M12, 24 deep

RMG 980- 300/150

310

-

310

180

150

245

M12, 24 deep

size

H

J

ØK

L

M

N

O

P

RMG 980- 70/35

40

45

40

57

M6, 6 deep

-

-

28

RMG 980-100/50

49

36

40

57

M6, 9 deep

-

-

36

RMG 980-140/65

66

45,5

60

57

M6, 9 deep

76

M8, 12 deep

45

RMG 980- 200/100

92

76

90

76

M8, 12 deep

105

M8, 12 deep

38

RMG 980- 300/150

141

77

90

76

M8, 12 deep

105

M8, 12 deep

53

5

Gas Mixer RMG 980 Construction and Function The gas mixer is constructed upon the Venturi principle: As the flow area is reduced in the middle of the mixer, the incoming gas no. 1 is accellerated in the gas mixing zone (4). Acc. to

The diameter of the core (5) is determined in accordance to the maximum flow.

The downstream sharp edges of the core support the turbulent mixing of both gases (homogenizing).

(pressure energy) + (energy of speed) = constant

To enable fine adjustments for the mixing ratio (i.e. for 位-regulation), a flowrate valve type RMG 992 can be added (see also RMG leaflet 992.00)

the pressure of gas no. 1 is reduced in this area, and a differential pressure builds up at the gas mixing gap (3).

Thus gas gas no. 2 flows through the gap (3) and mixes with gas no. 1 in the downstream zone (4).

At option the pressure connection (6) can be used together with a regulator for atmospheric pressure to compensate the pressure for gas no. 2.

In accordance to the Venturi principle the ratio between gas no. 1 and gas no. 2 follows a near constant, linear characteristic.

The mixing ratio between gas no. 1 and gas no. 2 is given through the gas mixing gap (3). gas no. 2 core (5)

mixture of gas no. 1 and gas no. 2 gas no. 1

gas mixing gap (3)

pressure connection (6)

6

gas mixing zone (4)

Gas Mixer RMG 980

flow of gas no. 2

Chart: mixing ratio

flow of gas no. 1

Device description (example)

RMG 980

-

100 / 50 -

34

-

0,8

type of device size (see table on page 3) venturi diameter core diameter width of mixing gap

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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

Betriebsstelle 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

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

Serving the Gas Industry - WORLDWIDE

We reserve the right for technical changes