March 2013 pg 1

wwwequilibarcom

Unique Diaphragm Regulator Technologybull 5X more Precise than standard Pressure Regulatorsbull Dome loaded for Manual or Automated control

bull Elegant friction-less designbull Suitable for ultra-pure hygienic and aggressive chemicals

NL Series Liquid Service

Pressure stability across widely varying flow rates

Pressurebull range 01 to 2000 psiStandard Body Materials SS316 PVCbull Diaphragms PTFE Viton Buna PE SS316bull Sizes 18rdquo through 1rdquobull Includes special feature to prevent water hammer bull in high-velocity liquid applications

Dome Loaded DesignMatches your process pressure 11 to the pressure bull provided on the top reference port

In Line PortingOpposed inlet and outlet portsbull

Manual AdjustmentUse manual regulator to provide set-pointbull

Computer Automated ControlUse electronic pressure regulator to provide set-pointbull

12rdquo EB4NL4 SS316 w manual set-point

38rdquo EB3NL3 SS316

Precision Back Pressure Valves

March 2013 pg 2

wwwequilibarcom

The Equilibarreg back pressure regulator is an excit-ing breakthrough in precision pressure control Designed for critical and demanding processes the patented Equilibarreg offers unmatched precision across a wide range of pressures and flow rates

How the Equilibar Back Pressure Regulator Works

The Equilibarreg Precision Back Pressure Regulator works like a fluid transistor by forming a unique force balance on a flexible diaphragm between three separate pressures

The fluid inlet pressure and the downstream outlet pressure exist on the wetted side of the diaphragm The pilot set-point applies pressure on the non-wetted side

The lower pressure of the outlet tries to hold the diaphragm in a leak-tight seal with the orifices However any slight excess between the fluid inlet pressure and the pilot set-point pressure quickly overwhelms these seating forces and pulls the dia-phragm away from the orifices

The pilot set-point pressure acts in a 11 ratio to set the pressure to be controlled on the inlet port As shown at right this pilot pressure can be supplied by either an electro-pneumatic regulator or a manual regulator

Traditional backpressure regulators use springs to gradually open up as the overpressure is used to compress the spring

The Equilibar back pressure regulator uses only a frictionless flexible diaphragm to modulate the pre-sure It fully opens in less than 1 overpressure in most applications Our multiple orifices allow us to control over incredibly wide flow rate ratios - over 10001 ratios in most applications - and handle two phase flows

Equilibar back pressure technology is protected by US and foreign patents Learn more about our precision back pressure valve technology on our website (wwwequilibarcom)

Unmatched Precision

Sensitivity and Precision - Our Key Performance Advantage

Inlet Outlet

Pilot(Reference)Diaphragm

EP

Electro-PneumaticRegulator

ManualPressureRegulator

- OR -

2 Set-Point Options

14rdquo GS4 SS16 back pressure regulatorwith manual set-point regulator

March 2013 pg 3

wwwequilibarcom

Material Pressure Range

PTFE 02 psig to max body pressure

PTFEGlass 5 psig to max body pressure

PolyEthylene 002 psig to 20 psig

Viton (reinforced) 05 psig to max body pressure

Buna N (reinforced) 05 to max body pressure

SS316 100 psig to max body pressure

Polyimide 5 psig to max body pressure

NL Series Precision Back Pressure ValveNL Series Features

Metallic NL Series

Polymeric NL Series

38rdquo EB3NL3 SS316

Model Inlet Outlet Port

Reference Port

Standard BodyMaterials Dim A Dim B Max Std

PressureMax Custom

PressureCv Range

(precision)Available End

Fittings

(inch) (psig) Min1 Max Std Available

EB2NL2 14rdquo

18rdquo

SS316 (std)

Carbon Steel (Black Oxide)

30 16 500 2000 1E-3 10

NPT

150Flange

BSPSAE

VCO styleVCR style

EB3NL3 38rdquo 35 17 400 1500 1E-3 18

EB4NL4 12rdquo 45 19 400 1500 1E-3 30

EB5NL6 34rdquo 60 24 300 1000 1E-2 60

EB6NL8 1rdquo 70 32 300 1000 1E-2 90

EB8NL12 1 12rdquo 90 46 200 500 1E-1 143

EB10NL16 2rdquo 110 55 200 500 3E-1 302

Designed specifically for liquid serviceExcellent for gas and mixed phase as wellRugged Bar Stock DesignUnique Chatter Suppresion FeatureHigh Precision

Model InletOutlet Port

Reference Port

Standard BodyMaterials Dim A Dim B Max Pressure

psigCv Range

(precision)Available End

Fittings

(inch) PVC other PTFE Min1 Max Std Available

EB2NL2 14rdquo

14rdquo

PVC (std)PTFE

CPVCPVDF Acetal

30 16 100 50 1E-3 10

NPT

BSP

Flange (PVC CPVC)

EB3NL3 38rdquo 35 17 100 50 1E-3 18

EB4NL4 12rdquo 45 19 75 50 1E-3 30

EB5NL6 34rdquo 60 24 75 50 1E-2 60

EB6NL8 1rdquo 70 37 75 50 1E-2 90

Available Diaphragms

Wetted Components Body amp Diaphragmbull No wetted o-rings bull Chatter Suppression Abilitybull 1 - Minimum Cv dependant on diaphragm bull and set-point pressureDimensions and Cv values subject to changebull

A

Reference Port (18)

B Outlet Port Inlet Port

March 2013 pg 4

wwwequilibarcom

About Precision Back Pressure Regulators

Dramatic stability improvement

The Equilibarreg sets a new industry standard in pres-sure control This chart shows the superior flow stability of the Equilibarreg over the Tescom regulator

Note Due to the traditional spring actuated back pressure regulation the Tescom performance shows a significantly higher amount of overpressure than the Equilibarreg regulators over varying flow rates Traditional pressure regulators hold constant pres-sure until you vary the flow rate

Back Pressure Regulator vs Pressure Reducing Regulator

Pressure Reducing Regulators (PRRrsquos) are the most common type of regulator They reduce a higher up-stream pressure into a controlled lower downstream pressure A PRR opens to increase downstream pressure and closes to reduce it

A Back Pressure Regulator (BPR) works in the op-posite way controlling the upstream pressure Just like a relief valve a BPR closes to increase upstream pressure and opens to reduce it The Equilibar is a precision Back Pressure Regulator that is dome-loaded A fluid signal commands the regulator to control with a 11 ratio This signal is supplied via a manual or electronic pressure device

Precision over varying flow ranges

The inlet pressure of most back pressure regulators vary significantly with changes in process flow

The chart at right shows how the Equilibar regula-tor holds a constant process pressure even through widely varying flow rates The GS regulator can achieve as high as 100001 flow turn down ratios This is extremely useful in applications where the flow consumption varies significantly Pressure is maintained stable even with sudden spikes or drops in flow

PRR BPR

0

100

200

300

400

500

0 200 400 600 800

0

10

20

30

40

50

60

70

80

0 5 10 15 20 25 30In

let P

ress

ure

kpa

g

Air Flow normal LPM

Inle

t Pre

ssur

e p

sig

Air Flow SCFM

Air Performance ComparisonEQUILIBARreg vs Tescom

Equilibarreg 38

Equilibarreg 14

Tescom 26-23 High Precision(14 38 12)

Set Point 30 psi (206 kPa)

0

5

10

15

20

25

30

35

40

45

0 50 100 150 200 250 300

0

1

2

3

4

5

6

7

0 2 4 6 8 10 12

Inle

t Pre

ssur

e k

pag

Air Flow normal LPM

Inle

t Pre

ssur

e p

si g

Air Flow SCFM

Low Pressure Air ComparisonEQUILIBARreg vs Fairchild

EQUILIBARreg 38

Fairchild 30 BP Precision 38

Set Point 3 psi (85 kPa)

03 3 30 300

1

10

100

01

1

10

100

001 01 1 10 100

Air Flow normal LPM

Inle

t Pre

ssur

e k

pag

Inle

t Pre

ssur

e p

sig

Air Flow SCFM

Ultra Wide Flow Range Performance38 Equilibar GR w VT9 diaphragm

Various Set Points 25 5 1 2 5 10 and 30 psig

March 2013 pg 5

wwwequilibarcom

Applications

There are hundreds of potential applications for the unique capabilities of the Equilibarreg The NL and NLB series is specifically designed liquid gas and mixed phase services

Applications span from ultra low flow rates to extreme high pressures By using unique combinations of diaphragms and o-ring materials Equilibarreg regulators are able to perform in the harshest environments that include high temperature and aggressive chemicals

Precision Control with Closed Loop Control

For most applications the Equilibarreg is precise enough to be used with a simple manual set-point pressure input However for some automation appli-cations it is useful to have closed loop control using an external pressure transmitter By using an electro-pneumatic regulator with external feedback it is pos-sible to match the reading of your process pressure transmitter exactly to your desired set-point

The Equilibarreg provides numerous benefits over traditional control valves in these closed-loop appli-cations Such benefits include extremely wide flow range ultra fast reaction times and ease of PID tun-ing

Equilibar PrecisionBack Pressure Regulator

reg

I O

air

Process

PT

Pressure Feedback0-10 VDCor 4-20 mA

Set Point0-10 VDCor 4-20 mA

EP

Electro-PneumaticRegulator wExternal Feedback

PIDController

Liquid Pump Pressure Control

The Equilibarreg can precisely control the discharge pressure of virtually any type of pump by simply plac-ing the regulator in the return line back to the supply reservoir

Use an ectro-pneumatic regulator for the set-point signal for computer automation of your system pres-sure Or use a manual regulator as shown to the left for simple manual control of your system pressure

Pulse Generating Applications

The Equilibarrsquosreg unique frictionless direct sealing dia-phragm design gives it unprecedented capabilities to generate precision pulse waveforms with millisecond timing

Your PLC or computer control system can now create realtime pressure waveforms using any fluid and any pump

The system works by using an Electro-Pneumatic Regulator to command the pulse wave in air The Equilibar is able to mirror that same pressure wave-form into your process liquid

reg

reg

IOR

March 2013 pg 6

wwwequilibarcom

Applications (continued)

Vacuum Control

The Equilibarreg can control in the vacuum range just as easily in the positive pressure range

The reference pressure can be supplied by a sensitive manual vacuum regulator or by an electro-pneumatic regulator (as shown)

See the Equilibar Vacuum Regulator brochure for ad-ditional details Equilibar Precision

Vacuum Regulatorreg

I O

VacuumSupply

Process

Set Point0-10 VDCor 4-20 mA

EP

PG

Electro-PneumaticVacuum Regulator

Glove Box Ventilation Control

The Equilibar can control gas pressures in glove boxes or other ventilation applications

Supply gas can be provided by a blower or other flow control means Reference pressure can be provided by an elctro-pneumatic regulator (shown) or manual spring regulator

I O

R

Gas - Precision Pressure Supply

It is possible to use the Equilibar precision back pres-sure regulator as part of a precision pressure control 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 not required by your application The advantage is far greater precision across widely varying flow rates than by conventional regulators

Reactor Pressure Control Nitrogen Padding

The Equilibarreg makes it easy to control reactor pres-sure or to pad vessels with inert gases such as nitro-gen

Gas inflows to the vessel can be provided by any con-venient means The Equilibarrsquos superior flow range (up to 10001) and pressure window (down to 02 psi) gives the user a superior operating window Reference pressure set-point can be provided by the Equilibarreg LPR2 for pressures below 05 psi or by an electro-pneumatic regulator for easy computer auto-

I O

R

March 2013 pg 7

wwwequilibarcom

Manual Control

Equilibar Precision Back Pressure Regulators get their precision from using a fluid set-point pressure (also called lsquoreferencersquo or lsquopilotrsquo pressure) on their top port

Customers can supply their own fluid set point signal or chose one of the accessories below

Set-Point Kits

ApplicationSupply

Pressure Ports

Equilibar Part

NumberOutlet Pressure

RangeRepeatability amp Sensitivity

Suggested Pressure Gauge

Ultra Low Pressure

LPR2-7i025 to 7 inWC

(001 to 025 psig)0-10 inWC

LPR2-14i05 to 14 inWC

(002 to 05 psig)0-30 inWC

High Precision

max 50 psig T10LR-25p 05 to 25 psig 25p-25b-2c

T10-25p 2 to 25 psig 25p-25b-2c

T10-60p 2 to 60 psig 60p-25b-2c

T10-120p 2 to 120 psig 160p-25b-2c

Compact Economical

CPR-10 0-10 psig 10p-25b-1c

CPR-30 0-30 psig 30p-25b-1c

CPR-60 0-60 psig 60p-25b-1c

CPR-100 0-100 psig 100p-25b-1c

High Pressure

HPR-500p 0-500 psig 500p-25b-1c

HPR-1000p 0-1000 psig 1000p-25b-1c

HPR-2000p 0-2000 psig 2000p-25b-1c

HPR-5000p 0-5000 psig 5000p-25b-1c

Vacuum

VPR-30hg 04 to 30 inHg

VPR-10hg 04 to 10 inHg

Panel mount only

VPR-3hg 0-3 inHg Consult factory

Notes - No gauge port provided on regulatorAll regulators are self-relieving with continous bleed (consumption)All regulators are designed for air service

VacuumRegulators to 30 inHg

Sensitivity01 inHg

20-turn

18 Inlet Outlet

(no gauge)30h-25b-2

CompactRegulators

18Inlet

OutletGauge

Repeat-ability01 psigmax 150 psig

HighPressureRegulators

3000 - 6000 psig

(typical)

18Inlet

OutletGauge

Sensitive through a

wide range of pressures

LPR2Ultra Low PressureRegulator

5 to 20 psig (stable)

Sensitivity 002 inWC

Stability 006 inWC

14Inlet

Outlet(no Gauge)

High PrecisionBelloframType 10

14Inlet

OutletGauge

Sensitivity 005 psig

max 150 psig

March 2013 pg 8

wwwequilibarcom

Process Automation

Automating your process pressure is easily accomplished by using an electronic pressure regulator to provide the set-point pressure to the Equilibar dome-loaded back pressure regulator

Equilibar is proud to represent precision electronic regulators from Proportion-Air These devices are custom tuned on the bench to work perfectly with the Equilibar

Contact Equilibar or visit our website for additional details about the many possible configuration of these products

Set-Point Controllers

Ultra Precision Regulators (QPV MPV Series)QPV Series

Aluminum IP65 enclosure Optional digital display

(shown) 4-20 mA or 0-10 VDC

MPV Series Same internals as QVP

0-10 VDC command inputCard DIN or manifold mount

Precision Regulators QB1 Series

Aluminum IP65 enclosure Optional digital display

4-20 mA or 0-10 VDC

Min range vacuum 0-1 psig Max range 0 -500 psig 02 to 05 FS accuracy Tuned ready for set-point service Good for most applications

QP1 High PressureAluminum IP65 enclosure

4-20 mA or 0-10 VDC

Min range vacuum 0-1 psig Max range 0 -1000 psig 05 FS accuracy

Min range 0-03 psig vacuum Max range 0-150 psig Superior proportional valve action Accuracy 01 - 05 FS Resolution 0005 - 02 FS Lowest available pressure range in class Tuned ready for set-point service Optional DeviceNet Serial communication

March 2013 pg 9

wwwequilibarcom

Contact our EngineersAt Equilibar your applicationrsquos unique requirements will be carefully addressed by one of our trained application engineers Please contact us if you have any questions or special requirements

Web www equilibarcom

Email inquiryequilibarcom

Telephone (828)650-6590

Fax (801)504-4439

Address Equilibar LLC 320 Rutledge Road Fletcher NC 28732

Application Engineering How we are different

Unlike mass-market regulator distributors everything about Equilibar is focused on you the scientist or engineer with a unique pressure control challenge

We assign an Application Engineer to you typi-cally within moments of your call We work with you closely to identify the optimum model trim and diaphragm to best meet your challenge You can stay in touch with your Application Engineer by email telephone mobile phone or fax

After installation if there are any unexpected issues your Application Engineer is still available to sup-port you with start-up information or (if needed) expedited replacement parts

About Equilibar

Equilibar LLC manufacturers and markets our specialized products worldwide Equilibar branded products are made in the USA and protected by US and foreign patents

All of our products are assembled inspected and tested by trained technicians in Fletcher NC

Other products from Equilibar

NLB Series Back Pressure Valves The NLB Series extends Equilibarrsquos performance to the larger sizes from 15rdquo to 3rdquo External elbows are welded or glued to minimize body size

Instrument Series BPRs Our new Instrument Series dome loaded back pres-sure regulators offer performance up to 5000 psig and temperatures up to 3270C with the use of SS316 diaphragms and Kalrezreg o-rings

EVR Series Vacuum Regulators The EVR Series uses the GS Series BPR but adds a manual set-point kit to make vacuum control of processes easy and simple