General Description 906.00 edition 05/000 Serving the Gas Industry WORLDWIDE
Application filter for municipal distribution, industrial systems, and power plants suitable for natural gas and all noncorrosive gaseous media Characteristics high degree of filtration filter insert with exchangeable filter mesh and plugtogether filter basket environmentfriendly disposal of soiled filter mesh reusable filter baskets special feature for RMG 906a: big dustcollecting chamber, optional with magnetic insert for prefiltration of rust and metallic materials. Technical data type RMG 906 RMG 907 RMG 906a max. service pressure p max 6 bar 6 bar 6 bar 5 bar 0 bar pressure rating *) enquire for higher pressure ratings PN 6 PN 6 PN 6 PN 5* ANSI 50 RF* sizes DN 5 DN 00 DN 5 DN 00 DN 5 DN 00 DN 5 DN 00 DN 5 DN 00 connections temperature range filter mesh flanged to DIN PN 6 flanged to DIN PN 6, PN 5 and to ANSI 50 RF measurements for connections acc. to DIN 50 or to ANSI B 6.5 resp. 0 C to +60 C special plated paper filter area DN 5 0.050 m 0.9 m 0.57 m DN 00 0.9 m.56 m max. flow velocity in the pipe 0 m/s (a much lower flow velocity is recommended when high dust pollution is to be expected)
retaining degree type filter mesh version retained grain size (µm) retaining degree (%) standard polyester enforced fine filtering > 0 > 4 > 99 pressure drop / flowrate standard value for new insert limit for soiled insert see pages 8 to 0 p < 0.05 bar p max = 0.5 bar materials body filter basket sealings Aluminiumguß (RMG 906, DN 5 bis DN 00; RMG 907) Gußeisen mit Kugelraphit (RMG 906, ; RMG 906a) StahlLochblech, verzinkt NBR (rubberlike plastic material) testing production and testing ac.c to DIN 0690 an dacc. to DVGW worksheet G 498, documentation of the testing results together with works certificate acc. to EN 004 DVGW registration no. RMG 906, RMG 906a: RMG 907: G95c06 G95c064 optional version with differential pressure measurement (additional remote indication with Reed signalling at pressure gauge possible) with magnetic insert for RMG 906a RMG 906a in HTB version for "high temperature resistance" for max. 4 bar service pressure with filter insert coming from other manufacturers
CK cellular filter. measurements RMG 906 RMG 906a Ø E Ø E L K C D clearance for dismantling F M D DN clearance for dismantling F DN H A RMG 907 B I B clearance for dismantling G Ø E A K DN C clearance for dismantlg. F H I screw plug for condensate bleed G / (DN 5, ) G ( bis ) screw plug for condensate bleed M 6 x,5 (DN 5) G / (DN 5 bis DN 00) B K connection for measuring line for differential pressure M x,5 (DN 5) M 6 x,5 ( ) L ring screw for DN M ring screw for, DN 00 B 4
dimensions type DN A B C D E F G housing volume (in litres) weight (in kg) 5 40 65 0 04 50 0.45.5 RMG 906 50 80 0 68 95 5 5 80 59 79 50 600.6 5. 7 00 8 60 470 4 70.5 50 400 90 680 760 89 000 4 8 5 90 0 0 0 80 00 0.8 8 RMG 906a 50 80 60 0 65 0 0 90 455 70 5 0 640 80 60.5 0 44 00 80 45 470 55 65 760 40 0 64 5 78 87 04 95 0. RMG 907 50 80 4 66 59 79 60 500.4 4. 6 00 59 4 570 7.5 6 all measurements in mm (if not stated differently) Note For installation, for taking into operation, and for maintenance the following leaflets should be observed: RMGleaflet "General Operating Instructions for Gas Pressure Regulators and Safety Devices" RMGleaflet "Operation and Maintenance, Spare Parts 906.0" The cellular filters RMG 906, RMG 906a and RMG 907 should be mounted horizontally with an upright position of the filter insert. An Arrow on the body of all filters indicates the flow direction. 5
. Design The cellular filters of the types RMG 906, RMG 906a and RMG 907 are constructed to retain gas impurities such as dust, rust, and other solid particles moving within gas transporting lines, especially in front of gas pressure regulating and flow metering lines. The filters consist mainly of the body (), the lid (), and the filter insert (). The filter cartridge is accessed easily by removing the lid. The filter insert, which consists of the plugtogether filter basket (4), and the filter mesh with rubber rings (5), enables easy exchange of the soiled mesh and environmentfriendly disposal. Depending on the filtering task and the grain size to be filtered, differernt mesh material can be used. The filter insert is sealed off towards the body and the lid resp. by two Orings (6 and 7). The cellular filters of the type 906a is constructed in such a way, that a halfpipe (8) in the body enables a preextraction of larger particles which can fall into the dust pouch. The halfpipe also offers protection for the filter insert. If desired, the sealing screw (9) can be removed, and a magnetic insert may be mounted to enable a prefiltration of rust and metallic materials. All cellular filters can be equipped with differental pressure measurement. An optional version for electric remote signalling includes a differential pressure gauge () with Reed switch. The ball valves () are mounted in the connecting lines or the pressure balance lines. The differential pressure measurement is independent of the flow direction and can be mounted on eiter side of the filter. scheme of the differential pressure measurement 6
7 4 5 6 7 4 8 5 6 RMG 906 9 0 9 RMG 906a 7 4 5 6 RMG 907 7
4. pressure drop with new filter inserts filter mesh type (standard version) Note: The values are calculated for natural gas (ρ n = 0.8 kg/m ) When using other gases convert the pressure drop acc. to p = ρ other gas / 0.8 x p diagram pressure drop p in mbar example: q n 00 mh service pressure 6 bar RMG 906a DN80 p = bar standard flowrate q n in m h 8
filter mesh type (polyesterenforced version) Note: The values are calculated for natural gas (ρ n = 0.8 kg/m ) When using other gases convert the pressure drop acc. to p = ρ other gas / 0.8 x p diagram pressure drop p in mbar example: q n 00 m h service pressure 4 bar RMG 906a DN00 p = 6.5 bar standard flowrate q n in m h 9
filter mesh type (finefiltering version) Note: The values are calculated for natural gas (ρ n = 0.8 kg/m ) When using other gases convert the pressure drop acc. to p = ρ other gas / 0.8 x p diagram pressure drop p in mbar example: q n 00 mh service pressure 0 bar RMG 906 DN50 p = 7 bar standard flowrate q n in m h 0
5. filter designation (example) RMG 906a 80 / 5 / / / / So type size DN service pressure filter mesh magnetic insert differential pressure measurement differential pressure gauge ball valve special version type RMG 906 RMG 907 RMG 906a size DN 5 DN 00 (only RMG 906) pressure rating PN 6 PN 5 (only RMG 906a) ANSI 50 (only RMG 906a) filter mesh standard polyesterenforced finefiltering magnetic insert for RMG 906a without magnetic insert with magnetic insert 906 907 906a differential pressure measurement without differental pressure measurement with differental pressure measurement for direction of flow left to right with differental pressure measurement for direction of flow right to left differential pressure gauge differential pressure gauge without Reed switch differential pressure gauge without Reed switch differential pressure gauge with ball valve for shutting off without ball valve with ball valve in the connecting lines with ball valve in the connecting lines and in the pressure compensating line special version (to be described) example: closing screws and hook screws made of stainless steel, openair version, HTBversion, etc. 5 50 80 00 50 6 5 50 0 0 0 0 So Reserving the right for technical changes!