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EXF
High-Flow Single Stage
Pressure Reducing Regulator
The AURA EXF is designed to provide primary control
of high flow gases and liquids at delivery pressures up to 250
psig. The EXF’s balanced stem seat design enables the use of
larger orifices and seat sizes to accommodate higher flow rates.
In addition, it eliminates the need for spring assisted shutoff of
the inlet stream so fluctuations in outlet pressure are minimized.
AURA’s dual surface diaphragm also provides sensitive pressure
control even at low pressures while the EXF’s large .8 orifice size
and ½” process ports allow for maximum flow.
AURA’s proprietary machining process yields surface
finishes of 4-25 Ra designed to reduce corrosion. With its
minimal internal volume, the EXF also allows less gas to be used
while purging. Each EXF regulator is assembled in a Class 100
clean room as a complete assembly with all gauges, valves, and
fittings attached. The complete assembly is 100% helium leak
checked and cleaned for oxygen service. Additionally, the EXF
undergoes multiple flow and function tests to meet the harsh
demands and rugged environment of any application worldwide
For highly acidic or caustic applications, AURA’s
LumiShield inert and anti-corrosive technology provides
exceptional corrosion resistance and performance as a superior
choice versus exotic metals or passivated surfaces. Combined
with AURA’s balanced stem seat design, the EXF provides the
functionality and flexibility that engineers depend upon for high
flow applications.
EXF Features
1. Balanced stem seat
• Steady pressure control
2. Dual surface diaphragm
• Extremely sensitive even at
lower temperatures
3. 4-25 Ra surface finish
• Minimizes corrosion
4. Low internal volume
• Minimal dead volume
5. Field access to adjusting spring
• Change delivery pressure ranges
in the field
6. Field access to adjusting screw
• Lock pressure setting
6
3
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EXFHigh-Flow Single Stage Pressure Reducing Regulator
Technical Data and Product Specifications
Materials of Construction
EXFS EXFN EXFC EXFG
Body 316L stainless steel Nickel-plated brass Chrome-plated brass LumiShield
Bonnet 304 stainless steel Nickel-plated brass Chrome-plated brass LumiShield
Seat PCTFE PCTFE PCTFE PCTFE
Pin 316L stainless steel 316L stainless steel 316L stainless steel LumiShield
Nozzle 316L stainless steel Brass Brass LumiShield
40-Micron inlet filter 316L stainless steel 316L stainless steel 316L stainless steel LumiShield
O-ring seal PTFE PTFE PTFE PTFE
Functional Specifications
Design Pressure
• Working pressure: 5500 psig PCTFE
• Burst pressure: > 150% Working pressure
Temperature
Maximum Inlet Pressure • PCTFE (4500 psig maximum inlet pressure) Weight
(bare body)
Leak Rate
Flow Coefficient (Cv) • .8
• External: 1x10 -7 He ccs
• Seat: 1x10 -7 He ccs
Gauges
(optional)
• PCTFE: -40˚F to 150˚F (-40˚C to 66˚C)
• 6 Ibs 4.5 oz. (2.85 kg)
• 2" manufactured to ANSI/ASME B40.1
EXF Regulator PCTFE Seat
EXF REGULATOR, PCTFE SEAT
250
200
Each EXF regulator assembly includes:
OUTLET (PSI)
150
100
50
500 PSI IN
500 psig IN
1000 psig IN
2500 psig IN
1000 PSI IN
2000 PSI IN
• Class 100 cleanroom assembly
• 100% helium leak check
• Cleaning for oxygen service
• 100% function test
• Silicone-free assembly
• Certificate of conformance
• Certificate of cleaning for oxygen service
0
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
FLOW (SCFH)
AURA Products are Manufactured and Assembled in the U.S.A.

EXF SERIES
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Mounting and Installing Information
Port Arrangement
Style A
Port 6
Port 1
Port Arrangement
Style B
2 3/4"
(70mm)
Port 1
90°
TYP.
Panel
Mount
Kit
(Optional)
6 3/4" max. (172mm)
3.64" (92.5mm)
3.13" (79.5mm)
1.33"
(33.8mm)
ø.750"
(19.1mm)
Bolt Circle
Port 5
Port 2
Port 4 Port 2
ø2.98"
(75.7mm)
ø2.48"
(63mm)
2.21"
(56.1mm)
ø2.710"
(68.8mm)
Port 4
Port 3
Port 3
1 3/4-16 UN-2A
Thread
Max. Panel Thickness = .375" (9.53mm)
Panel Hole = ø1.39" (35.3mm)
#10-32 UNF-2B Thread x .280" (7.1mm) Deep
(Orientation depends on port arrangment.)
Ordering Information
EXF
4 5 6
0
8
-01-
13 14 15
- 16 17
0
Digit 4 - Material of Construction
S = 316L stainless steel
N = Nickel-plated brass
C = Chrome-plated brass
G = LumiShield inert and anti-corrosive technology
Digit 5 - Pressure Range
1 = 0-15 psig
2 = 0-50 psig
3 = 0-120 psig
4 = 0-200 psig
5 = 0-250 psig
Digit 6 - Gauges (Major/Minor Scale)
0 = No gauges
1 = Inlet (psig/kPa)
2 = Outlet (psig/kPa)
3 = Both inlet and outlet (psig/kPa)
5 = Inlet gauge (BAR/psig)
6 = Outlet gauge (BAR/psig)
7 = Both inlet and outlet (BAR/psig)
Digit 8 - Assembly
See the EXF Port Configuration Table on the back
of this brochure for choice of assembly.
Digits 13-15 - Inlet Port
Cylinder Connection*
000 = None (½" female NPT)
M06 = 6mm ss compression tube fitting
M12 = 12mm ss compression tube fitting
TF2 = ⅛" ss compression tube fitting
TF4 = ¼" ss compression tube fitting
TF6 = ⅜" ss compression tube fitting
TF8 = ½" ss compression tube fitting
Digit 16 - Valve Assembly
0 = No valve (ss, ni, cp, LumiShield)
1 = Diaphragm valve (ss, cp, LumiShield)
Digit 17 - Outlet Fitting
0 = None (½" female NPT)
1 = ¼" male NPT fitting
2 = ⅛" ss compression tube fitting
3 = ¼" ss compression tube fitting
4 = ⅜" ss compression tube fitting
5 = ½" ss compression tube fitting
6 = 6mm ss compression tube fitting
7 = 8mm ss compression tube fitting
8 = 10mm ss compression tube fitting
9 = 12mm ss compression tube fitting
A = ⅜" BSP RH cp fitting
B = ⅜" BSP LH cp fitting
Key:
ss = Stainless steel
ni = Nickel-plated brass
cp = Chrome-plated brass
RH = Right hand
LH = Left hand
CON = Cylinder Connection
NOTE: If you are unable to find a
configuration specific to your application’s
needs, call AURA Gas Controls directly at
800.582.2565.
*AURA Supports all major international cylinder connections including: CGA, BS 341, DIN 477, JIS B 8246, and others available
1501 Harpers Road, Virginia Beach, Virginia 23454
800.582.2565
www.AURACONTROLS.com
Registered ISO 9001

EXF
High-Flow Single Stage Pressure Reducing Regulator
Port Configuration Table
¼ ¼ ¼ ¼ ¼
90°
1
2 3 4 5
¼ ¼ ¼ ¼ ¼
¼
¼
60°
¼
¼
¼
¼
¼
¼
¼
6 7 8 9
A
¼
¼
¼
¼
¼
¼
¼
¼
¼
½
LP
½
LO
½
LO
½
HO
½
HO
B
½
LO
D
½
HO
½
HO
E
½
LO
½
LO
F
½
HO
½
HO
G
½
LO
½
LP
½
LP
½
LP
½
LP
½
LP
¼
¼
¼
¼
¼
½
LO
H J K L
M
¼ ¼ ¼
¼
¼
½
LO
½
HO
¼
¼
¼
¼
½
LO
N
½
HO
P
90°
Q
R
T
½
LO
¼
¼ ¼ ¼ ¼
¼ ¼ ¼ ¼ ¼ ¼ ¼ ¼
U V
W X
Y
¼
¼
¼ ¼ ¼ ¼ ¼ ¼ ¼
Key:
LO - Low Pressure Open
LP - Low Pressure Plugged
LR - Low Pressure with Relief Valve
HO - High Pressure Open
HP - High Pressure Plugged
1501 Harpers Road, Virginia Beach, Virginia 23454
800.582.2565
www.AURACONTROLS.com
Registered ISO 9001
LEX3179EXF-B