Accessories - esapyronics.com

1 AccessoriesPressure regulatorsZero Governors (EN88/1)BZR-REG-II (E5102 rev. 02 - 02/11/2017)BZR-REG-II E5102 rev. 02 - 02/11 :CONTACTS / SERVICE:Headquarters:Esa Enrico Fermi 4024035 Curno (BG) - ItalyTel + Sales:Pyronics International Zoning Industriel, 4 me rueB-6040 Jumet - BelgiumTel + Fax regulators and associated safety devices forgas appliances - Part 1: Pressure regulators for inlet pres-sures up to and including 50 kPa. Certificato CE-51CP4479 GENERAL WARNINGS: All installation, maintenance, ignition and setting mustbe performed by qualified staff.

2 Read the instructionsbefore use. This control shall be installed in accordance with the rules in force. T o avoid damage to people and things, it is essentialto observe all the points indicated in this handbook. Thereported indications do not exonerate the Client/Userfrom observing general or specific laws concerning acci-dents and environmental safeguarding. The operator must wear proper DPI clothing (shoes, ) and respect the general safety, preventionand precaution norms. T o avoid the risks of burns or high voltage electrocu-taion, the operator must avoid all contact with the burnerand its control devices during the ignition phase andwhile it is running at high temperatures.

3 All ordinary and extraordinary maintenance must beperformed when the system is stopped. T o assure correct and safe use of the combustionplant, it is of extreme importance that the contents of thisdocument be brought to the attention of and be meticu-lously observed by all personnel in charge of controllingand working the devices. The functioning of a combustion plant can be dange-rous and cause injuries to persons or damage to equip-ment. Every burner must be provided with certified com-bustion safety and supervision devices. The burner must be installed correctly to prevent anytype of accidental/undesired heat transmission from theflame to the operator or the equipment.

4 The performances indicated in this technical docu-ment regarding the range of products are a result ofexperimental tests carried out at ESA-PYRONICS. Thetests have been performed using ignition systems, flamedetectors and supervisors developed by ESA-PYRO-NICS. The respect of the above mentioned functioningconditions cannot be guaranteed if equipment, which isnot present in the ESA-PYRONICS catalogue, is dispose of the product, abide by the local legislationsregarding :GENERAL NOTES: In accordance to the internal policy of constant quali-ty improvement, ESA-PYRONICS reserves the right tomodify the technical characteristics of the present docu-ment at any time and without warning.

5 It is possible to download technical sheets which havebeen updated to the latest revision from the The products manufactured by ESA-PYRONICS have been created in conformity to the UNI EN 746-2:2010 Norms: Equipment for industrial thermal process- Part 2: Safety requirements for combustion and themovement and treatment of combustible elements. Thisnorm is in harmony with the Machine Directive2006/42/CE. It is certified that the products in questionrespect all the requirements prescribed by the abovementioned Norms and Directives.

6 Certified in conformity with the UNI EN ISO 9001 Norm by DNV products conform to the requests for the Euroasia market(Russia, Belarus and Kazakhstan).BZR-REG-II E5102 rev. 02 - 02/11 BZR-REG-II pressure regulators have been desi-gned according to the EN88/1 Norm and are ideal forapplications with burners, gas mixers and proprotionalmixers as they allow fuel flow regulation and maintainthe fuel/combustion agent ratio stable throughout thewhole regulation range. The regulor is driven by a pres-sure signal that is proprotional to the actual combustionair pressure and retsores the same pressure value onthe gas line.

7 There is a verison that can be used with gasup to 100 C. Gas regulation on venturi mixers. Gas regulation on proportional mixers. Gas regulation on all types of burner feeding STANDARD: Regulator group:2 Gas family: 1/2/3 Maximum working pressure:200mbar Nominal working pressure:80 200mbar W orking temperature:-10 C 60 C Maximum fluid temperature:50 C Flow ratio:100:1 Maximum differential pressure36 mbar Maximum air signal:70 mbar Minimum air signal:0,4 mbar Precision:at low flow mbarat full flow mbar S pring regulation field:+3 mbar / -5mbar * Regulation ratio:1 : 1 MATERIAL COMPOSITION: V alve body and seat:GAlSi V alve disc.

8 AISI303 Bearing shaftgalvanized iron Diaphragms: Material approved according to EN549 BZR-REG-II-HT HIGH TEMPERATURE: Regulator group:2 Gas family: 1/2/3 Maximum working pressure:200mbar Nominal working pressure:80 200mbar W orking temperature:-10 C 60 C Maximum fluid temperature:50 C Flow ratio:100:1 Maximum differential pressure36 mbar Maximum air signal:70 mbar Minimum air signal:0,4 mbar Precision:at low flow mbarat full flow mbar S pring regulation field:+3 mbar / -5mbar * Regulation ratio:1 : 1 MATERIAL COMPOSITION V alve body and seat:GAlSi V alve disc:AISI303 Bearing shaftgalvanized iron Diaphragms: Material approved according toEN549 Tmax=200 CNB: * only at maximum flowBZR-REG-II E5102 rev.

9 02 - 02/11 BZR-REG-II12 BZR-REG-II8 BZR-REG-II6 BZR-REG-II1101101001000 FLOWCHARTG5102I01 Natural gas flow @ 20 C [Nm3/h]Differential pressure [mbar]DESCRIPTIONThe balanced modulators or zero governors reduce thefluid pressure to the atmopheric pressure or charge units have twi diaphragms:- The first diaphragm, called balancing diaphragm, ismeant to separate the inlet gas chamber of the valve bodyfrom the underlying chamber of the main The second diaphragm, called main diaphragm is meantto balance the outlet pressure exisisting in the underlyingchamber of the diaphragm and the pressure existing inthe upper spring on these regulators is needed to counterba-lance the weight of the internal mobile parts and has anadditional voltage which is just enough to close upper chamber of the main diaphragm commu-nicates with the atmosphere or the pilotage pressure.

10 Thelower chamber instead, communicates via a pulse holewith the regulated pressure chamber downstream thevalve. When a there is a pressure difference between the upperchamber and lower chamber of the main diaphragm (posi-tive pressure in the upper chamber caused by the pressu-re charge or drop in the lower chamber caused by thesucntion of a venturi mixer), the valve moves downwardsthus allowing the gas to flow through the gas flow increses until the downstream pressure isequal to the existing pressure in the upper chamber; thisis possible because the downstream pressure, via thepulse hole, is transmitted in th elower chamber of the altering the pilot pressure (charge or drop) an imbalan-ce is caused between the existing pressures in the cham-bers.