February, 2013 pg. 1 PrecisionBack Pressure Regulators Unique Diaphragm Regulator Technology: • 5X more Precise than standard Pressure Regulators • Dome loaded for manual or electronic control • Elegant frictionless design • Suitable for ultra-pure, hygienic, and aggressive chemicals Hygienic FD SeriesBack Pressure Regulators Precision is now available in Hygienic Design Holds stable pressure at set-point from the lowest to the highest ow rate Improves ow control by isolating pressure variations Dome Loaded Design Matches your process pressure 1:1 to the pressure • applied to the top reference port Manual Adjustment Use manual regulator to provide set-point • Computer Automated Control Use electronic pressure regulator to provide set-point • EB5FD8 - SS316L with 1” Tri-Clamp Fittings Example of Liquid Product Blending Pressure range 1 psig to 150 psig • Ultra wide ow range (1000:1 turndown) • Temperatures up to 100 C • Standard 316L Stainless Steel Body • FKM (Viton) diaphragm std / PTFE/Glass available • T ri-Clamp ttings or weld tube stub ends • Crevice-free; drainable in vertical position •
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Equilibar s Hygienic FD Series Back Pressure Regulator Brochure
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7/29/2019 Equilibar s Hygienic FD Series Back Pressure Regulator Brochure
The Equilibar® back pressure regulator is an excit-ing breakthrough in precision pressure control.Designed for critical and demanding processes, the
patented Equilibar® oers unmatched precisionacross a wide range of pressures and ow rates.
How the Equilibar Back PressureRegulator Works
The Equilibar® Precision Back Pressure Regulatorworks like a uid transistor by forming a uniqueforce balance on a exible diaphragm betweenthree separate pressures.
The uid inlet pressure and the downstream outletpressure 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 thediaphragm in a leak-tight seal with the orices.However, any slight excess between the uid inletpressure and the pilot set-point pressure quicklyoverwhelms these seating forces and pulls the dia-phragm away from the orices.
The pilot set-point pressure acts in a 1:1 ratio to setthe pressure to be controlled on the inlet port. Asshown at right, this pilot pressure can be supplied byeither an electro-pneumatic regulator or a manualregulator.
Traditional backpressure regulators use springs togradually open up as the overpressure is used tocompress the spring.
The Equilibar back pressure regulator uses only a
frictionless fexible diaphragm to modulate the pre-sure. It fully opens in less than 1% overpressure inmost applications. Our multiple orices allow us tocontrol over incredibly wide ow rate ratios - over1000:1 ratios in most applications - and handle twophase ows.
Equilibar back pressure technology is protected byUS and foreign patents.
Unmatched Precision . . . .
Sensitivity and Precision -Our Key Performance Advantage
Inlet Outlet
Pilot
(Reference)Diaphragm
E/P
Electro-
Pneumatic
Regulator
Manual
Pressure
Regulator
- OR -
2 Set-Point Options
1/4” GS4 SS16 back pressure regulatowith manual set-point regulato
7/29/2019 Equilibar s Hygienic FD Series Back Pressure Regulator Brochure
Hygienic FD SeriesPrecision Back Pressure RegulatorIn-Line FD Series features
In-Line FD Body
ModelInlet / Outlet
PortReference
PortBody
MaterialsDim A
Dim A’(Tube Stub)
Dim B Dim C Dim DMax StdPressure
Cv Range(precision)
inch (mm) (psig) Min1 Max
EB1FD4 6mm ID1/2” Tri-Clamp
1/8”NPT
SS316L(std.)
Hastelloy C& Other
3.4(86)
N/A1.4(36)
2.0(51)
0.96(25)
150
1E-70.8
EB1FD4 10mm ID 1.0
EB5FD8 1” Tri-Clamp8.1
(204)5.9 (151)
2.4(61)
6.0(152)
1.98(50)
1E-3 8
EB6FD12 1.5” Tri-Clamp9.1
(230)6.8 (173)
2.7(69)
7.0(178)
1.98(50)
1E-2 12
EB8FD16 2” Tri-Clamp 11.1(280)
8.8 (223) 3.6(91)
9.0(229)
2.52 (64) 1E-2 19
For gas, liquid, and mixed phase processes
Hygienic design:
No Crevices•
<32Ra Finish•
Drains Fully•
Available Diaphragms 1 - Minimum Cv dependant on diaphragm and set-point•pressure
3.51E-05 3.51E-04 3.51E-03 3.51E-02 3.51E-01
0
5
1
1
2
2
3
0
5
10
15
20
25
30
35
40
45
1 10 100 1000 10000
Flow, SCFM
I n l e t P r e s s u r e ,
p s i g
Flow, ml/min
EB1F4 Water Performance Trials
6mm ID/Viton Diaphragm
Various Set Points: 5, 20, 40 Psig
EB1FD4 - SS316L with 1/2”
Tri-Clamp Fittings
Pressure Stability and Precision
Over Varying Flow
Equilibar regulators feature ultra sensitive dia-phragm operated back pressure technology thatis able to control pressure with high precisionover a wide range of ows. Most back pressureregulators vary signfcantly with changes inprocess ow. The stability of the Equilibar regu-lator is unmatched in the industry.
The graph on the right illustrates the pressurecontrol over 3 -4 orders of liquid ow at variousset points.
A (Tri-Clamp)
A' (Tube Stub)
D B
C
1/8" NPT Reference Port
7/29/2019 Equilibar s Hygienic FD Series Back Pressure Regulator Brochure
Hygienic FD SeriesPrecision Back Pressure RegulatorAngled FD Series Features
Angled FD Body
Model Inlet Port(s)1 OutletPort
ReferencePort
BodyMaterials
Dim A Dim BMax StdPressure
Max CustomPressure
Cv Range(precision)
inch (mm) (psig) Min2 Max
EB4FD81” Tri-Clamp
orTube Stub
2.5” Tri-
Clamp
1/8”
NPTSS316L 3.1 (180) 7.06 (79) 75 150 1E-2 4.0
For gas, liquid,
and mixed phase processesOptional double inlet porting designHygenic:
No Crevices•<32Ra Finish•drains fully•
Available DiaphragmsNotes:
1 - Double or Single Inlet Port Options
2 - Minimum Cv dependant on diaphragm and set-point
pressure
EB4FD8 - SS316L with two 1” Tri-Clamp inlets (available with one or two inlets)
B
A
EB4FD8 - SS316L with 1” Tube Stub inle
O
I
I
Equilibar PrecisionBack Pressure
Regulator
To Application
Pump
Drop out Tank
R
Set Point Controler
Example of Liquid Pump Control Applications
The FD series is specically designed for a variety
of gas, mixed phased and liquid applicationswhere high precision and sanitary or crevice freeinternals are a must.
An example of a typical liquid pump control appli-cation can be seen in the schematic on the left. Thedual inlet port allows for easy inline mounting fromthe pump to the application.