In Precision Pressure Control
The Ultimatein Precision Pressure ControlPrecision Back Pressure RegulatorsGS SeriesGas and Mixed Phase ServiceGas and Pressure stability acrosswidely varying flow rates Pressure range: 0.1 to 2000 psi Standard Body Materials: SS316, PVC Diaphragms: PTFE, Viton, Buna, PE, SS316 Sizes 1/8” through 1”1” GS8 SS316Dome Loaded Design Matches your process pressure 1:1 to the pressureprovided on the top reference portManual Adjustment Use manual regulator to provide set-pointComputer Automated Control Use electronic pressure regulator to provide set-point1” GS8 PVCw/ electronic set-pointUnique Diaphragm Regulator Technology: 5X more Precise than standard Pressure Regulators Dome loaded: for Manual or Automated control Elegant friction-less design Suitable for ultra-pure, hygienic, and aggressive chemicalsJanuary, 2010pg. 1
Unmatched Precision . . . .The Equilibar back pressure regulator is an excitingbreakthrough in precision pressure control. Designedfor critical and demanding processes, the patentedEquilibar offers unmatched precision across a widerange of pressures and flow rates.1/2” GS4 SS316How the Equilibar Back PressureRegulator WorksThe Equilibar Precision Back Pressure Regulatorworks like a fluid transistor by forming a uniqueforce balance on an flexible membrane betweenthree separate pressures.The fluid inlet pressure and the downstream exhaustpressure exist on the wetted side of the membrane,separated by a valve seat. The reference air pressureexists on the non-wetted side.The lower pressure of the outlet tries to hold themembrane in a leak-tight seal with the valve seat.However, any slight excess between the fluid inletpressure and the reference pressure quickly overwhelms these seating forces and pulls the membrane away from the valve seat.Traditional backpressure regulators use springs togradually open up as the overpressure is used tocompress the spring.The Equilibar pressure regulator uses only a frictionless flexible membrane to modulate the pressure. It fully opens in less than 1 psi overpressure;less than 0.01 psi in some applications.Equilibar back pressure technology is protected byUS and foreign patents.January, 2010pg. 2
GS SeriesPrecision Back Pressure RegulatorBack Pressure Regulator vs. PressureReducing RegulatorPressure Reducing Regulators (PRR’s) are the mostcommon type of regulator. They reduce a higher upstream pressure into a controlled, lower downstreampressure. A PRR opens to increase downstreampressure and closes to reduce it.EQUILIBAR vs. Fairchild7502002503004540Fairchild 30 BP Precision3/8"535304253Set Point 3 psi(85 kPa)220EQUILIBAR GS8 3/8"151015000246Air Flow, SCFM81012Air Performance ComparisonEQUILIBAR vs. Tescom0Equilibar 200Air Flow, normal LPM4006008008050070Tescom 26-23High Precision(1/4", 3/8", 1/2")6050400Inlet Pressure, kpagInlet Pressure, psi gNote: Due to the traditional spring actuated backpressure regulation the Tescom performance showsa significantly higher amount of overpressure thanthe Equilibar regulators over varying flow rates.Traditional pressure regulators hold constant pressure until you very the flow rate.1506Dramatic stability improvementThesets a new industry standard in pressure control. This chart shows the superior flowstability of the Equilibar over the Tescom regulator.Air Flow, normal LPM100300Equilibar GS3 3/8"4030200Equilibar GS2 1/4"Set Point 30 psi (206 kPa)2010010000Precision over varying flow rangesThe chart at right shows how the Equilibar GSregulator holds a constant process pressure eventhrough widely varying flow rates. The GS regulatorcan achieve as high as 10000:1 flow turn down ratios. This is extremely useful in applications wherethe flow consumption varies significantly. Pressureis maintained stable even with sudden spikes ordrops in flow.51015Air Flow, SCFM202530Ultra Wide Flow Range Performance3/8" GS3 GR w/ VT9 diaphragm0.33Air Flow, normalLPM30300100Inlet Pressure, psi gThe inlet pressure of most back pressure regulatorsvary significantly with changes in process flow.Inlet Pressure, kpag010010101Various Set Points: .25, .5, 1, 2, 5, 10 and 30 psig0.10.010.11Air Flow, SCFM10January, 2010Inlet Pressure, kpa gThe Equilibar GS series is a precision Back PressureRegulator that is dome-loaded. A fluid signal commands the regulator to control with a 1:1 ratio. Thissignal is supplied via a manual or electronic pressure device.BPRLow Pressure Air ComparisonInlet Pressure, psigA Back Pressure Regulator (BPR) works in the opposite way, controlling the upstream pressure. Justlike a relief valve, a BPR closes to increase upstreampressure, and opens to reduce it.PRR1100pg. 3.
GS SeriesPrecision Back Pressure RegulatorGS Series FeaturesFor gas & mixed phase processes1Rugged Bar Stock DesignSimpler two-piece bodySame high performance as NL and NLB SeriesReferencePortBOutletInlet1” GS8 PVCAMetallic GS SeriesInlet /OutletPortModelReferencePortStandard BodyMaterialsDim ADim BMax ”GS81”SS316 (std)1/8”Carbon steel(black oxide)Max CustomPressure(psig)Cv .02.635010001E-28.5Available EndFittingsStdAvailableNPTBSPSAEVCO styleVCR stylePolymeric GS SeriesModelInlet/OutletPortReferencePortStandard BodyMaterialsDim 1/4”Max PressurepsigDim BPVC, otherPTFECv Range(Precision)Min2MaxPVC 52.975501E-28.5Available EndFittingsStdAvailableBSPNPTFlange(PVC, CPVC)Available DiaphragmsMaterialPressure RangePTFE0.2 psig to max body pressurePTFE/Glass5 psig to max. body pressurePolyEthylene0.02 psig to 20 psigViton (reinforced)0.5 psig to max body pressureBuna N (reinforced)0.5 to max. body pressureSS316100 psig to max. body pressure Two wetted components (Body Diaphragm)No wetted o-ringsTwo plugged access ports on back side1 - Contact factory for liquid applications2 - Minimum Cv dependant on diaphragmand set-point pressureDimensions and Cv values subject to changeJanuary, 2010pg. 4
ApplicationsThere are hundreds of potential applications for the unique capabilities of the Equilibar . The GS series isspecifically designed for a variety of gas service and mixed flow applications where precision is a must.Applications span from ultra low flow rates to extreme high pressures. By using unique combinations ofdiaphragms and o-ring materials, Equilibar regulators are able to perform in the harshest environments thatinclude high temperature and aggressive chemicals.Gas - Precision Pressure SupplyIt is possible to use the Equilibar precision backpressure regulator as part of a precision pressurecontrol system, replacing less precise pressure reducing regulators.A flow control device meters a constant gas flow.The Equilibar is able to vent any excess gas notrequired by your application. The advantage is fargreater precision across widely varying flow ratesthan by conventional regulators.Reactor Pressure Control / NitrogenPaddingThe Equilibar makes it easy to control reactorpressure, or to pad vessels with inert gases such asnitrogen.Gas inflows to the vessel can be provided by anyconvenient means. The Equilibar’s superior flowrange (up to 1000:1) and pressure window (down to.02 psi), gives the user a superior operating window.ROIReference pressure set-point can be provided by theEquilibar LPR2 for pressures below 0.5 psi, or byan electro-pneumatic regulator for easy computerGlove Box / Ventilation ControlThe Equilibar can control gas pressures in gloveboxes or other ventilation applications.Supply gas can be provided by a blower or otherflow control means, Reference pressure can be provided by an elctro-pneumatic regulator (shown) ormanual spring regulator.RIO.January, 2010pg. 5
Applications (continued)The GS Series regulator can be used in mixed flowand vacuum applications. For full liquid applications please contact an applications engineer.Precision Ultra Low Pressure GasSupply SystemLPR2Ultra LowPressure RegulatorFew commercial regulators are capable of controlling gas below 0.5 psig with varying flow rates.Combining the LPR2 with an Equilibar PrecisionBack Pressure Regulator and a flow control valve toprovide incredible precision and responsiveness. Byventing any gas flow not required by the application,this system can accommodate forward or reversegas flow at the application without loss of accuracy.Air SupplyRExhaustOPrecision Pressure Supplyto ApplicationIEquilibar PrecisionBack PressureFlowRegulatorControlGasSupplyPrecision Control with Closed LoopControlFor most applications, the Equilibar is preciseenough to be used with a simple manual set-pointpressure input. However, for some automation applications, it is useful to have closed loop controlusing an external pressure transmitter. By using anelectro-pneumatic regulator with external feedback,it is possible to match the reading of your processpressure transmitter exactly to your desired setpoint.Pressure Feedback0-10 VDCor 4-20 mAPIDSet PointController 0-10 VDCor 4-20 mAE/PairPTProcessIThe Equilibar provides numerous benefits overtraditional control valves in these closed-loop applications. Such benefits include extremely wideflow range, ultra fast reaction times, and ease of PIDtuning.OEquilibar PrecisionBack Pressure RegulatorVacuum ControlElectro-PneumaticVacuum RegulatorThe Equilibar can control in the vacuum range justas easily in the positive pressure range.The reference pressure can be supplied by a sensitive manual vacuum regulator, or by an electropneumatic regulator (as shown).See the Equilibar Vacuum Regulator brochure foradditional details.Electro-PneumaticRegulator w/External FeedbackSet Point0-10 VDCor 4-20 mAE/PPGProcessIOEquilibar PrecisionVacuum RegulatorJanuary, 2010VacuumSupplypg. 6.
Air Performance CurvesLow Flow/Low Pressure Air PerformanceLow flow gas applications reveal the extra-ordinary unmatched precision capable with the Equilibar.3/8” Equilibar Air Performance Trials - HighMedium Pressure Air PerformanceThe chart below illustrates how the overpressure varies slightly with the increasing Set-Point pressure in theEquilibar.3/8” Equilibar Air Performance Trials - Low Flow.January, 2010pg. 7
Set-Point KitsManual ControlEquilibar Precision Back Pressure Regulators get their precisionfrom using a fluid set-point pressure (also called ‘reference’ or‘pilot’ pressure) on their top port.Customers can supply their own fluid set point signal or chose oneof the accessories below.ApplicationUltra Low PressureLPR2Ultra LowPressureRegulatorSupplyPressurePorts5 to 20 psig(stable)1/4"InletOutlet(no Gauge)EquilibarPartNumberOutlet Pressure RepeatabilitySuggestedRange& Sensitivity Pressure GaugeSensitivity:0.02 inWCLPR2-7i0.25 to 7 inWC(0.01 to 0.25 psig)LPR2-14i0.5 to 14 inWC Stability: 0.06(0.02 to 0.5 psig)inWC0-10 inWC*0-30 inWC*High PrecisionHigh PrecisionBelloframType 10max 50 psigmax 150 psig1/4"InletOutletGaugeT10LR-25p0.5 to 25 psigT10-25p2 to 25 psigT10-60p2 to 60 psig60p-2.5b-2cT10-120p2 to 120 psig160p-2.5b-2cCPR-100-10 psigSensitivity:.005 psig25p-2.5b-2c25p-2.5b-2cCompact EconomicalCompactRegulators1/8"max 150 psigInletOutletGaugeCPR-300-30 psigCPR-600-60 psigCPR-1000-100 psigHPR-500p0-500 psigHPR-1000p0-1000 psigHPR-2000p0-2000 psigHPR-5000p0-5000 psigVPR-30hg0.4 to 30 inHgVPR-10hg0.4 to 10 inHgVPR-3hg0-3 inHg10p-2.5b-1cRepeat-ability0.1 psig30p-2.5b-1c60p-2.5b-1c100p-2.5b-1cHigh PressureHighPressureRegulators3000 - ugh awide range 000p-2.5b-1cVacuumVacuumRegulatorsto 30 inHg1/8" InletOutlet(no gauge)Panelmount onlySensitivity0.1 inHg20-turn30h-2.5b-2Consult factoryNotes* - No gauge port provided on regulatorAll regulators are self-relieving with continous bleed (consumption)All regulators are designed for air service.January, 2010pg. 8
Set-Point ControllersProcess AutomationAutomating your process pressure is easily accomplished by using anelectronic pressure regulator to provide the set-point pressure to theEquilibar dome-loaded back pressure regulator.Equilibar is proud to represent precision electronic regulators fromProportion-Air. These devices are custom tuned on the bench to workperfectly with the Equilibar.Contact Equilibar or visit our website for additional details about themany possible configuration of these products.Ultra Precision Regulators (QPV / MPV Series)QPV SeriesAluminum IP65 enclosureOptional digital display(shown)4-20 mA or 0-10 VDCMPV SeriesSame internals as QVP0-10 VDC command inputCard, DIN, or manifold mount* Min range: 0-0.3 psig, vacuum* Max range: 0-150 psig* Superior proportional valve action* Accuracy: 0.1% - 0.5% FS* Resolution: 0.005% - 0.2% FS* Lowest available pressure range in class* Tuned ready for set-point service* Optional DeviceNet / Serial communicationPrecision RegulatorsQB1 SeriesAluminum IP65 enclosureOptional digital display4-20 mA or 0-10 VDCQP1 High PressureAluminum IP65 enclosure4-20 mA or 0-10 VDC* Min range: vacuum; 0-1 psig* Max range: , 0 -500 psig* 0.2 to 0.5% FS accuracy* Tuned ready for set-point service* Good for most applications* Min range: vacuum; 0-1 psig* Max range: , 0 -1000 psig* 0.5% FS accuracy.January, 2010pg. 9
Contact our EngineersOther products from EquilibarAt Equilibar, your application’s unique requirementswill be carefully addressed by one of our trainedapplication engineers. Please contact us if you haveany questions or special requirements.Web:www. (828)650-6590Fax:(801)504-4439Address:Equilibar, LLC320 Rutledge RoadFletcher, NC 28732NL Series Back Pressure RegulatorsThe NL Series has the same exact performance asthe GS Series BPRs. However, these units have anadditional water hammer suppression feature, making them ideal for most liquid applications.About EquilibarEquilibar, LLC manufacturers and markets ourspecialized products worldwide. Equilibar brandedproducts are made in the USA, and protected by USand foreign patents.All of our products are assembled, inspected andtested by trained technicians in Fletcher, NC.Application Engineering . . .How we are differentInstrument Series BPRsOur new Instrument Series dome loaded back pressure regulators offer performance up to 5000 psigand temperatures up to 3270C with the use of SS316diaphragms and Kalrez o-rings.Unlike mass-market regulator distributors, everythingabout Equilibar is focused on you, the scientist orengineer with a unique pressure control challenge.We assign an Application Engineer to you, typically within moments of your call. We work withyou closely to identify the optimum model, trim,and diaphragm to best meet your challenge. Youcan stay in touch with your Application Engineer byemail, telephone, mobile phone, or fax.After installation, if there are any unexpected issues,your Application Engineer is still available to support you with start-up information or (if needed)expedited replacement parts.EVR Series Vacuum RegulatorsThe EVR Series uses the GS Series BPR, but addsa manual set-point kit to make vacuum control ofprocesses easy and simple.January, 2010pg. 10.
The Equilibar back pressure regulator is an exciting breakthrough in precision pressure control. Designed for critical and demanding processes, the patented Equilibar offers unmatched precision across a wide range of pressures and flow rates. How the Equilibar Back Pressure Regulator Works The Equilibar Precision Back Pressure Regulator
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