Gas Pressure Regulator RMG 201

Transcription

1 Product information serving the gas industry worldwide

2 Application, characteristics, technical data Application application in industrial stations for small flowrate regulating lines in gas pressure regulating stations suitable for natural gas, gases acc. to G60, and all other non-corrosive gases Characteristics direct-acting, two-stage operation suitable for high pressure drops with safety relief valve for gas leakages in the intermediate pressure stage simple operation, check and maintenance Technical Data permissible operating pressure p zul up to 0 bar (depending on connections) max. inlet pressure p max 0 bar size (type of connection) inlet: outlet: screw connection without brazing acc. to DIN 33 for external pipe diameter 1 mm. 16 mm. 18 mm screw connection without brazing acc. to DIN 33 for external pipe diameter 1 mm. 16 mm. 18 mm. mm. mm. 8 mm. 38 mm. 4 mm flanged to PN 40. ANSI 300 or ANSI 600 in DN. DN 40 or DN 0 valve data adjustable intermediate pressure stage orifice size (valve seat dia.) in mm flow rate coefficient K G in m 3 /h (for natural gas. ρ n = 0.83 kg/m 3 ) orifice size (valve seat dia.) in mm regulating stage flow rate coefficient K G in m 3 /h (for natural gas) normal max.*) *) for KG max: proportional deviation exceeds accuracy class and closing pressure category. Use only if the flow does not change. i.e. in front of furnaces with constant consumption material body parts internal parts diaphragms. o-rings valve sealing aluminium alloy aluminium alloy. brass. nickle NBR (rubber-like plastic material) FPM (rubber-like plastic material)

3 Application, characteristics, technical data technical data temperature range -0 C to +60 C function and strength acc. to DIN EN 334 DIN-DVGW reg. no. NG-4301AS006 CE sign acc. to PED 3 specific outlet pressure ranges setpoint spring no. specific outlet pressure range W a Safety relief valve default setting intermediate pressure stage F F 3 up to 9 bar above p a up to 1 bar above p a fixed value 1 bar 18 bar regulating stage F F 3 F 4 F F 6 F 7 F bar to 0.04 bar 0.03 bar to 0. bar 0.07 bar to 0. bar 0.1 bar to 0.0 bar 0. bar to 1.00 bar 0.0 bar to 1.80 bar 0.7 bar to.00 bar p a bar p a bar p a bar p a bar p a + 0. bar without SBV without SBV Attention safety relief valve can be used only up to spring no. 6 and up to p a = 0. bar accuracy class and closing pressure class outlet pressure range accuracy class lock-up pressure class class of lock-up pressure zone p a 0.03 bar 0.03 bar < p a 0. bar 0. bar < p a 0.0 bar p a > 0. bar AC 0 AC AC AC. SG 30 SG 0 SG SG SZ.

4 Design and operation intermediate pressure gauge setpoint adjuster setpoint spring measuring diaphragm 4 connection for breathing line connection for external measuring line safety relief valve orifice of outlet pressure stage orifice of intermediate pressure stage setpoint spring setpoint adjuster inlet pressure outlet pressure intermediate pressure atmosphere

5 Design and operation The gas pressure regulator RMG 01 is designed to keep the outlet pressure constant within given limits, independent of inlet pressure and/or flow deviations. The gas pressure regulator consists of two expansion stages. The influence of the inlet pressure on the outlet pressure regulating accuracy is largely limited by means of the intermediate pressure stage. The setpoint of the intermediate pressure stage is adjustable. The diaphragm of the intermediate stage is charged with the outlet pressure as follow-up setpoint; thus the intermediate pressure always exceeds the outlet pressure by the value given by the setpoint spring. Therefore the intermediate pressure stage does not require a vent line. The intermediate pressure stage is also equipped with a safety relief valve, the response pressure is fixed to 1 bar (spring no. ) or 18 bar (spring no. 3). The control stage as well as the intermediate pressure stage can be equipped with different orifices. For outlet pressures up to 0. bar a safety relief valve for gas leakages is incorporated in the actuator. The setpoint can be adjusted 0.0 bar to 0. bar above outlet pressure. The outlet pressure charge is effected through the external measuring line. The outlet pressure to be controlled is registered at the measuring point and takes direct effect on the measuring diaphragm of the control stage. The resulting force is compared to the force of the setpoint spring. Every control deviation results in a corresponding (proportional) stroke change of the orifice of the outlet pressure stage. The following alteration of flow leads to an adaption of the actual outlet pressure to the setpoint. In case of zero flow the regulator shuts off bubble-tight.

6 Dimensions and connections Ø 83 SW 3 breathing line E1 safety relief vent line E 1 47 measuring line E Ø 8 A Ø 00 spanner size 3 mm B C dimensions and connections pipe connections (screw connection without brazing acc. to DIN 33) flanged connections (only on outlet side) (flanges are connected to the main body via screw connections without brazing acc. to DIN 33) for pipe size inlet (A) outlet (B) E E E E E - 18 E 8-14 E 38-1 E pressure rating PN /40 ANSI 300 RF ANSI 300 RJ ANSI 600 RF ANSI 600 RJ (C) for outlet pipe size DN DN 40 DN

7 Regulator Designation determination of the intermediate pressure p z (Insert absolute pressure values into the calculation) setpoint spring : p z up to 9 bar above p a (approx. 8 bar at max. flow) setpoint spring 3: p z up to 1 bar above p a (approx. 13 bar at max. flow) The determination starts with setpoint spring. Using this spring the intermediate pressure can be set at up to max. 8 bar above pa for max. flow. Should this max. pressure not be sufficient to reach the desired flowrate, then setpoint spring no. 3 is to be used. 7 determination of the valve seat diameter of the outlet pressure stage example 1: p a = 0.00 bar q n max = 1 m3/h (for natural gas), flowrate varies p z = 8 bar q n 1 K G req = = = 8 m3/h p z abs 9 Result: required valve diameter of the outlet pressure stage should be mm, with K G = 3 m3/h Note: The chosen K G -value should be approx. % to 0 % above the calculated K G -value. q n 30 example : K G erf = = = 1 m3/h p z abs 9 No valve seat diameter with the required KG-value available! Thus setpoint spring 3 is chosen for the intermediate pressure stage with max. value p z = 13 bar. q n 30 K G erf = = = 33 m3/h p z abs 14 Result: required valve diameter of the outlet pressure stage should be 1 mm with K G = 40 m 3 /h Note: The chosen K G -value should be approx. % to 0 % above the calculated K G -value. Determining the valve seat diameter of the intermediate pressure stage Choosing the valve seat diameter of the intermediate pressure stage follows the same rules as a normal valve calculation using: min. inlet pressure p emin, intermediate pressure p z from calculation 4., and max. flow q n max.

8 Regulator Designation Intermediate prsssure stage: Determination of the necessary flow rate coefficient K G -value for natural gas (ρ n = 0,83 kg/m3) (use overpressure values in diagram!) , 3 intermediate pressure p z inlet pressure pe in bar 1 0,7 0, 0,4 0,3 0, 0,1 0, K G in m 3 /h 3 1 example: p e = bar q nmax = 0 m3/h p z = bar K G from diagram = 18 m3/h Determined: outlet pressure stage valve diameter. mm with K G = 3 m3/h

9 Regulator Designation Outlet prsssure stage: Determination of the necessary flow rate coefficient K G -value for natural gas (ρ n = 0,83 kg/m3) (use overpressure values in diagram!) outlet pressure p a in bar 00 9 intermediate pressure pz in bar 1, 1 0,7 0, 0,4 0,3 0, 0,1 0,1 0, 0, 0,1 0, KG in m3/h 3 1 example: p e = 8 bar q nmax = 0 m3/h p z = 0, bar K G from diagram = 3 m3/h Determined: outlet pressure stage valve diameter 1 mm with K G = 40 m3/h. NOTE: The chosen K G -value should be % - 0% above the necessary K G -value.

10 Gas Pressure Regulator RMG 01

11 Type description example: RMG /40 - F Ex F3 type description inlet- / outlet-connection inlet outer pipe diameter 1 mm outer pipe diameter 16 mm outer pipe diameter 18 mm outlet outer pipe diameter 1 mm outer pipe diameter 16 mm outer pipe diameter 18 mm outer pipe diameter mm outer pipe diameter mm outer pipe diameter 8 mm outer pipe diameter 38 mm outer pipe diameter 4 mm flanged to PN 40 DN DN 40 DN 0 /40 40/40 0/40 flanged to ANSI 300 RF DN DN 40 DN 0 /3F 40/3F 0/3F flanged to ANSI 300 RTJ DN DN 40 DN 0 /3J 40/3J 0/3J flanged to ANSI 600 RF DN DN 40 DN 0 /6F 40/6F 0/6F flanged to ANSI 600 RTJ DN DN 40 DN 0 /6J 40/6J 0/6J intermediate pressure stage adjustable measuring stage p zmax = 9 bar + p a p zmax = 1 bar + p a F F3 valve seat dia. Ø.0 mm Ø 3.7 mm Ø. mm Ø 8.0 mm Regelstufe external measuring line Ex measuring stage with safety relief valve (SBV), only for p a up to 0. bar without safety relief valve (SBV) SBV 0 valve seat dia. Ø 1. mm Ø 3. mm Ø 6.0 mm Ø.0 mm Ø 1.0 mm specific outlet pressure range W a = 0-40 mbar W a = 30-0 mbar W a = 7-0 mbar W a = - 00 mbar W a = bar W a = bar W a = bar F F3 F4 F F6 F7 F8 safety relief valve safety relief valve response pressure p s in bar 0.0 above p a 0.00 above p a 0.07 above p a 0.0 above p a 0. above p a setpoint spring: F F3 F4 F F6* *) only for p a up to 0. bar

12 For More Information To learn more about RMG s Advanced Gas Solutions, contact your RMG account manager or visit GERMANY RMG Regel + Messtechnik GmbH Osterholzstrasse Kassel, Germany Tel: +49 (0) Fax: +49 (0) ENGLAND Bryan Donkin RMG Gas Controls Ltd. Enterprise Drive, Holmewood Chesterfield S4 UZ, England Tel: +44 (0) Fax: +44 (0) RMG Messtechnik GmbH Otto-Hahn-Strasse 3 Butzbach, Germany Tel: +49 (0) Fax: +49 (0) RMG Gaselan Regel + Messtechnik GmbH Julius-Pintsch-Ring Fürstenwalde, Germany Tel: +49 (0) Fax: +49 (0) WÄGA Wärme-Gastechnik GmbH Osterholzstrasse Kassel, Germany Tel: +49 (0) Fax: +49 (0) POLAND Gazomet Sp. z o.o. ul. Sarnowska Rawicz, Poland Tel: +48 (0) Fax: +48 (0) CANADA Bryan Donkin RMG Canada Ltd. 0 Clarke Street South, Woodstock Ontario N4S 0A8, Canada Tel: +1 (0) Fax: +1 (0) USA Mercury Instruments LLC 3940 Virginia Avenue Cincinnati, Ohio 47, USA Tel: +1 (0) Fax: +1 (0) TURKEY RMG GAZ KONT. SIS. ITH. IHR. LTD. STI. Birlik Sanayi Sitesi, 6. Cd. 6. Sokak No: TR - Sasmaz / Ankara, Turkey Tel: +90 (0) Fax: +90 (0) RMG Honeywell International Inc.