GAS PRESSURE REGULATOR WITH OR WITHOUT INCORPORATED SAFETY SHUT-OFF DEVICE TYPE: 131 (shut-off device: - for high pressure VP - for high and low pressure VNP) REGULATOR PRITISKA BEZ I SA BLOKADNIM MEHANIZMOM TIP: 131 (blokada od: - visokog pritiska VP - visokog i niskog pritiska - VNP) TECHNICAL MANUAL TEHNI^KI KATALOG
INTRODUCTION Pressure regulator type: 131 is pilot controlled gas pressure regulator for low and medium pressure, which ensure a constant downstream pressure (p2). They can be provided with shut-off device for low and high pressure or for high pressure. They can be used with natural gas, LPG, air, nitrogen, etc. UVOD Regulator pritiska tip: 131 predstavlja regulator indirek tnog dejstva (u svom sastavu ima pilot za niske i srednje pritisk e) koji obezbeñuje konstantnu vrednost izlaznog pritiska (p 2 ). Regulator se izvodi i sa sigurnosno prek idnim mehanizmom (odnosno blokadnim mehanizmom) tip: 131-BV i to za visok i i niski pritisak ili za visok i pritisak. Koristi se za prirodni gas, tečni naftni gas, vazduh, azot, itd. Picture 1. / Slika 1. Type: 131 / Tip:131 Version without safety shut-off device/ Varijanta bez blokadnog mehanizma Picture 2. / Slika 2 Type: 131-BV/ Tip:131-BV Version with safety shut-off device/ Varijanta sa blokadnim mehanizmom MAIN FEATURES - Design pressure (PS): 25 bar - Ambient temperature: -20ºC +60 ºC - Max inlet pressure: 12 bar - Range outlet pressure: 0,05 4 bar - Nominal size: DN25, DN32, DN40, DN50 - Nominal pressure: PN16, PN25, ANSI 150 - Regulating characteristics: DN p 2 [bar] AC SG p bl [bar] AG 25 32 40 50 0,05 0,1 10 20 VP 0,1 1,0 5 10 1,0 4,0 2.5 5 Table 1. 0,03 2,0 2,0 5,0 2,5 NP 0,002 0,6 5 - Connections according to EN 1092-1, EN 1759-1 - Face to face dimensions according to EN 334 - Available nozzle diametar (mm): see Tables 3 6 OSNOVNE KARAKTERISTIKE - Projektni (PS): 25 bar - Temperatura okoline: -20ºC +60 ºC - Max ulazni pritisak: 12 bar - Opseg izlaznog pritiska: 0,05 4 bar - Nazivne dimenzije: DN25, DN32, DN40, DN50 - Klasa pritiska: PN16, PN25, ANSI 150 - Regulacione karakteristike: DN p 2 [bar] AC SG p bl [bar] AG 25 32 40 50 0,05 0,1 10 20 VP 0,1 1,0 5 10 1,0 4,0 2.5 5 Tabela 1. 0,03 2,0 2,0 5,0 2,5 NP 0,002 0,6 5 - Prirubnice u skladu sa EN 1092-1, EN 1759-1 - Ugradbene mere u skladu sa EN 334 - Raspoloživi prečnici dizne (mm): videti tabele 3 6 GT-131-01 1
REGULATOR OPERATION In the abse nce of pre ssure, gas pressure regulators type: 131 and type: 131-BV are in close d position. Inlet pressure is lea de d to the pilot. P ilot is setted at a re quested va lue of pressure p 2. C ontrol pressure inta ke from pilot acting on upper side of diaphra gm (1), thus overcoming the spring (2) action, and through dia phra gm a ssembly a nd le ver (3) move the rod (4) w ith pad unit (5) a nd open regula tor. At the same time, ga s inta ke thruogh impuls pipe at low er side of diaphra gm a nd a small a mount is rea lise d into the outlet pipe. Whe n outlet pressure increase up to presset value, the nozzle (6) is comple tely ope ne d. Gas consuption ca use outlet pressure decreasing, and ca use c losing nozzle by moving pa d unit. This is main gas re gulator function: Mainta ing c onsta nt outle t pressure w hic h is defined by accuracy c lass (AC). Set point pressure is esta blished by the adjusting screw and spring in pilot. In order to increase the outlet pressure, rotate c loc kw ise the a djusting screw, a nd to decrease the outle t pressure rotate counterclockw ise the adjusting screw. O PIS RAD A Regulatori pritiska tip: 131 i tip: 131-BV su u početnom stanju zatvoreni. Ulazni ptitisak se dovodi do pilota. Pilot je podešen na zahtevanu vrednost izlaznog pritiska (p2). Upravljačk i pritisak iz pilota deluje na gornju stranu membrane (1), savlañujući silu opruge (2) i preko membranskog sk lopa i poluge (3) gura trn (4) i zatvarač (5) u otvoren položaj. Istovremeno gas prolazi i ispod membrane, a deo se kroz impulsni vod rasterećuje u izlaznu cev. Zatvarač otvara sedište (6) do potpunog ottvaranja kada vrednost izlaznog pritiska dostigne podešenu vrednost p iz.. Potrošnja gasa prouzrokuje pad izlaznog pritiska što dovodi do ponovnog zatvaranja reglatora i obavljanje njegove osnovne funkcije: održavanje konstantnog izlaznog pritiska gasa u okviru zadatih granica odstupanja definisanih regulacionom grupom (RG). Vrednost izlaznog pritiska se podešava pritezanjem opruge pilota pomoću regulacionog zavrtnja, sabijanjem opruge vrednost raste i obrnuto. Picture 3. / Slika 3. GT-131-01 2
PILOT OPERATION Gas pressure regulators type 131 and type: 131-BV are equiped w ith a pilot type : 117. P ilot type: 117 is use d for low a nd medium pressure c ontrol. In the a bsence of pressure, pilot is in open position, i.e. forc e of the spring (7), through stirrup (6) act on the rod (2) and ma intain the nozzle (3) ope ne d. Letting the gas (inlet gas in re gulator p1) in insta llation, gas flow through the pilot and through im puls pipe act on upper side of regula tor dia phra gm. O utlet pressure from re gulator p 2, through impuls pipe, ac t on diaphragm (4), whic h toge ther w ith spring (1) mainta in the control pressure p c onsta nt. Control pressure is through impuls pipe bringe d up at the upper side of re gulator diaphra gm. At the sette d value of c ontrol pressure, pilot is still opened, a nd gas flow from upper dipa hragm hosuing of regulator to lower dipa hra gm housing of regula tor. Further increase od pressure p 2 close the pilot a nd pressure in uper a nd low er dipa hragm housing is equa lised. Regulator spring close the re gula tor. Set point of control pressure p is establishe d by the adjusting screw (8) and the spring (7). In order to increase control pressure, rotate clockw ise the adjusting screw, and to decre ase the c ontrol pressure rotate counterc loc kw ise the adjusting screw. O PIS RAD A PILOTA Regulatori pritiska tip:131 i tip 131-BV se izvode sa indirek tnim upravljenjem sa pilotom tip: 117. Pilot tip: 117 se koristi za nisk e i srednje pritisk e. U početnom stanju (kada u instalaciji nema gasa) pilot se nalazi u otvorenom položaju, tj. sila opruge (7) preko uzengije (6) deluje na trn (2) koji diznu (3) drži otvorenom. Puštanjem gasa (ulaznog pritiska regulatora p 1 ) u instalaciju, pritisak prolazi k roz pilot i impulsnim vodom se dovodi iznad membrane regulatora. Izlazni pritisak regulatora p 2 se preko impulsnog dovodi ispod membrane (4) koji zajedno sa oprugom (1) polako pritvara pilot i obezbeñuje konstantan upravljački pritisak p. Upravljački pritisak se preko impulsnog voda dovodi sa gornje strane membrane regulatora. Kada pritisak p dostigne zadatu vrednost pilot je i dalje otvoren a gas iz pilota prestrujava iz gornje u donju komoru membrane regulatora. Daljim porastom pritiska prvo se zatvatra pilot i kada se pritisak u komorama regulatora izjednači, opruga regulatora zatvara diznu regulatora. Podešavanje upravljačkog pritiska se ostvaruje pomoću regulacionog zavrtnja (8), čijim protezanjem ili otpuštanjem se preko opruge (7) ostvaruje zahtevana vrednost pritiska p. Okretanjem regulacionog zavrtnja u smeru kazaljke na satu povećava se vrednost upravljačkog pritiska i obrnuto. Picture 4. / Slika 4. P ilot type: 117 / Pilot tip: 117 GT-131-01 3
SHUT-OFF DEVICE OPERATION Gas pressure regulator equiped with shut-off device is called 131-BV. Protecting the instalation and the consumers after regulator against extreme (high and low) pressure is the basic function of shut-off device (protection against only high pressure upon request). Shut-off devices for protection against high and low pressure are: - 0 2 bar: type: GT.BM.VNP.02.65.P (Picture 5.) - 2 5 bar: type: GT.BM.VNP.05.65.P (Picture 6.) Shut-off devices for protection against high pressure protection are: - 0-2 bar type: GT.BM.VP.02.65.P - 2-5 bar type: GT.BM.VP.05.65.P Operation shut-off device for protection against low and high pressure is explained in folowing text. Outlet pressure intake through the pulse pipe under the diaphragm assembly (1). Pressure increasing move the diaphragm assembly upper, through lever (2) cause moving of pusher (11) which release the ball (3) from the rod (4). The rod under the spring (5) load move the valve disc (6) to c lose the nozzle. Increasing outlet pressure act uppon diaphragm assembly and overcome the high pressure spring (7) load (VP). Decreasing outlet pressure move the diaphragm assembly dow n under the low pressure spring (8) load (NP) and through lever move the pusher and release the ball from the rod. Activate pressure is realized by setting springs (7) and (8) by adjusting ring for VP (9) and adjusting ring NP (10). Rotate adjusting ring clockwise for increase pressure or rotate adjusting ring counterclockwise to decrease activating pressure. Shut-off device is manualy reset by pulling handle (12). Shut-off device used only for protection against high pressure is equipied without spring NP (8) and adjusting ring for NP (10). Picture 5. Shut-off device type : GT.BM.VNP.02.65.P Picture 6. Shut-off de vice type : GT.BM.VNP.05.65.P GT-131-01 4
O PIS RAD A BLO KAD NOG MEHAN IZMA Regulator pritiska tip:131-bv se izvodi sa integrisanim blokadnim mehanizmom. Blokadni mehanizam štiti instalaciju i potrošače posle regulatora od previsokog i preniskog pritiska,. Blokadni mehanizmi za zaštitu od previsokog i preniskog pritiska su: - 0 2 bar: tip: GT.BM.VNP.02.65.P (Slika 5.) - 2 5 bar: tip: GT.BM.VNP.05.65.P (Slika 6.) Blokadni mehanizmi za zaštitu od previsokog pritiska su: - 0 2 bar: tip: GT.BM.VP.02.65.P - 2 5 bar: tip: GT.BM.VP.05.65.P Opis rada blokadnog mehanizma za zaštitu od preniskog i previsokog pritiska opisan je u tekstu ispod. Izlazni pritisak se impulsnim vodom dovodi ispod membranskog sklopa (1) blokadnog mehanizma. Porast pritiska prouzrokuje pomeranje membranskog sklopa na gore koji preko poluge (2) povlači trn (11) čime je osloboñena kuglica (3) a samim tim i osovinica (4) koji pod oprugom (5) gura zatvarač (6) na sedište. Pri porastu izlaznog pritiska membranski sklop savlañuje oprugu VP (7). Pad izlaznog pritiska dovodi do pomeranja membranskog sklopa usled sile opruge NP (8), koji preko poluge povlači osovinicu i oslobaña kuglicu, odnosno otključava bravu blokadnog mehanizma. Podešavanje pritiska aktiviranja obezbeñuje se pomoću pritezača opruge VP (9) i pritezača opruge NP (10). Okretanjem pritezača u smeru kazaljke na satu, povećava se pritisak aktiviranja i obrnuto. Blokada se ručno deaktivira povlačenjem ručnog potiskivača (12). Kod blokadnog mehanizama samo za zaštitu od previsokog pritiska, ne ugrañuju se pozicije (8) i (10). Slika 5. Blokadni mehanizam tip: GT.BM.VNP.02.65.P Slika 6. Blokadni mehanizam tip: GT.BM.VNP.05.65.P GT-131-01 5
OVERALL DIMENSION / GABARITNE DIMENZIJE Picture 7. / Slika 7. Dimension / Dimenzije mere D N A B C D E F G H I J [mm] 25 355 250 225 80 230 60 160 165 270 135 32 355 250 225 90 230 60 180 165 270 135 40 365 250 225 100 240 75 200 165 280 145 50 375 250 225 115 250 85 230 165 285 150 Table 2. / Tabela 2. GT-131-01 6
FLOW RATES TABLE Stm 3 /h / TABELE PROTOKA Stm 3 /h Folow ing flow table referred to natura l ga s / Tabele protoka se odnose na prirodni gas Table 3. / Tabela 3. Table 4. / Tabela 4. GT-131-01 7
Table 5. / Tabela 5. Table 6. / Tabela 6. GT-131-01 8
For other gases w ith differnt de nsitie s, the flow rate m ust be multipie d by the c orrec tion factor: / Za druge gasove, vrednosti iz tabele se množe sa korekcionim faktorom: w here ρg is gas de nsity at temperature t = 0 C a nd pressure p = 1,01325 bar / gde je ρg gustina tog gasa na temperaturi t = 0 ºC i pritisku p = 1,01325 bar. For usua l use d gase s c orrec tion factor is show n in folow ing ta ble 8. / Korek cioni faktor za najčešće korišćene gasove dat je u tabeli 8. Gas / Gas Re lative de nsity / Gustina [kg/stm 3 ] Corre ction factor f / Korekc. faktor f Buta ne / Butan 2,01 0,53 Propa ne / Propan 1,53 0,62 Air / Vazduh 1 0,77 Nitrogen / Azot 0,97 0,79 Table 7. / Tabela 7. "GasTeh" d.o,o. Kralja Petra I b.b. 22320 Indjija Serbia tel/fax: +381022/561-630 e-mail: www.gasteh.com GT-131-01 9