Norgren B73G User Manual
Install a pressure gauge or plug the gauge ports. Gauge
ports can also be used as additional outlets for regulated air.
Metal bowl liquid level indicator lens: Transparent nylon
Filter/Regulator
B73G - """ - """ - """
B73G
Installation & Maintenance
Instructions
Thread Form
Port
A....PTF
2....1/4"
B....ISO Rc taper
3....3/8"
G....ISO G parallel
4....1/2"
* Outlet pressure can be adjusted to pressures in excess of, and less than, those specified. Do not use these units to control pressures outside of the specified ranges.
TECHNICAL DATA
Fluid: Compressed air
Maximum pressure:
Transparent bowl: 10 bar (150 psig)
Metal bowl: 17 bar (250 psig)
Operating temperature*:
Transparent bowl: -34° to +50°C (-30° to +125°F)
Metal bowl: -34° to +80°C (-30° to +175°F)
* Air supply must be dry enough to avoid ice formation at
temperatures below +2°C (+35°F).
Particle removal: 5 µm, 25 µm, or 40 µm filter element
Air quality: Within ISO 8573-1, Class 3 and Class 5
(particulates)
Typical flow with 10 bar (150 psig) inlet pressure, 6,3 bar
(90 psig) set pressure and 1 bar (15 psig) droop from
3
/s (123 scfm)
set: 58 dm
Nominal bowl size: 0,1 litre (3.5 fluid ounce)
Manual drain connection: 1/8"
Automatic drain connection: 1/8"
Automatic drain operating conditions (float operated):
Bowl pressure required to close drain: Greater than 0,3
bar (5 psig)
Bowl pressure required to open drain: Less than 0,2 bar
(3 psig)
Minimum air flow required to close drain: 0,1 dm
scfm)
Manual operation: Depress pin inside drain outlet to
drain bowl
Gauge ports:
1⁄4 PTF with PTF main ports
Rc1/4 with ISO Rc main ports
Rc1/8 with ISO G main ports
Materials:
Body: Aluminum
Bonnet: Zinc
Valve: Brass
Bowl:
Transparent: Polycarbonate
Transparent with guard: Polycarbonate, steel guard
Metal: Aluminum
Element: Sintered polypropylene
Elastomers: Neoprene and nitrile
REPLACEMENT ITEMS
Service Kit (includes items circled on exploded view):
Relieving.............................................................4383-600
Nonrelieving .......................................................4383-601
Liquid level lens kit (43, 45, 46, 47) ......................4380-020
Filter element, 5µm, red speckles (50).....................4438-01
Filter element, 25µm, blue speckles (50) .................4438-02
Filter element, 40µm, no speckles (50)....................4438-03
Manual drain (18, 19, 20) ..........................................619-50
Automatic drain (21, 22, 23) .................................4000-51R
Tamper resistant cover (knob adjustment only).......4455-51
PANEL MOUNTING DIMENSIONS
Panel mounting hole diameter: 48 mm (1.89")
Panel thickness: 2 to 6 mm (0.06" to 0.24")
INSTALLATION
1. Shut off air pressure. Install filter/regulator in air line -
! vertically (bowl down),
! with air flow in direction of arrow on body,
! upstream of lubricators and cycling valves,
! as close as possible to the device being serviced.
2. Connect piping to proper ports using pipe thread sealant
on male threads only. Do not allow sealant to enter
interior of unit.
3. Push bowl, or bowl with guard, into body and turn fully
clockwise before pressurizing.
4. Flexible tube with 5mm (3/16") minimum I.D. can be
connected to the automatic drain. Drain may fail to
operate if the tube I.D. is less than 5mm (3/16"). Avoid
restrictions in the tube.
© Norgren 2011
Adjustment
K....Knob
T....T-bar
Drain
A....Automatic
Q....Manual, 1/4 turn
3
/s (0.2
Bowl
D....Metal with liquid level indicator
P....Transparent with guard
T....Transparent
5.
ADJUSTMENT
1. Before applying inlet pressure to filter/regulator, turn
adjustment (1 or 7) counterclockwise to remove all force
on regulating spring (12).
2. Apply inlet pressure, then turn adjustment (1 or 7)
clockwise to increase and counterclockwise to decrease
pressure setting.
3. Always approach the desired pressure from a lower
pressure. When reducing from a higher to a lower
setting, first reduce to some pressure less than that
desired, then bring up to the desired pressure.
With non-relieving filter/regulators, make pressure
reductions with some air flow in the system. If
made under no flow (dead-end) conditions, the
filter/regulator will trap the over-pressure in the
downstream line.
4. KNOB ADJUSTMENT. Push knob down to lock pressure
setting. Pull knob up to release. Install tamper resistant
cover (see Replacement Items) to make setting tamper
resistant.
5. T-BAR ADJUSTMENT. Tighten lock nut (8) to lock
pressure setting.
SERVICING
1. Open manual drain to expel accumulated liquids. Keep
liquids below baffle (49).
2. Clean or replace filter element when dirty.
DISASSEMBLY
1. Filter/regulator can be disassembled without removal
from air line.
2. Shut off inlet pressure. Reduce pressure in inlet and
outlet lines to zero.
3. Turn adjustment (1 or 7) fully counterclockwise.
4. Remove bowl - push into body and turn
counterclockwise.
5. Disassemble in general accordance with the item
numbers on exploded view. Do not remove the drains
unless replacement is necessary. Remove and replace
drains only if they malfunction.
CLEANING
1. Clean plastic bowl (25, 35) with warm water only. Clean
other parts with warm water and soap.
2. Rinse and dry parts. Blow out internal passages in body
(16) with clean, dry compressed air. Blow air through
filter element (50) from inside to outside to remove
surface contaminants.
3. Inspect parts. Replace those found to be damaged.
Replace plastic bowl with a metal bowl if plastic bowl
shows signs of cracking or cloudiness.
ASSEMBLY
1. Lubricate the following items with o-ring grease.
4 (Thrust washer) - outer circumference and both sides.
5, 7 (Adjusting screw) - threads and tip.
18, 28, 37 (Manual drain body) - the portion of the
body that contacts the bowl, and the hole that
accommodates the stem of drain valve (19, 29, 38).
53 (Valve) - stem.
26, 34, 47, 54 (O-rings)
2. Assemble the unit as shown on the exploded view. Push
bowl, or bowl with guard, into body and turn fully
clockwise.
3. Torque Table
Item Torque in Nm (Inch-Pounds)
2, 9 (Screw) 2,3 to 3,4 (20 to 30)
22, 32, 41 (Nut) 2,3 to 2,8 (20 to 25)
43 (Screw) 1,7 to 3,4 (15 to 30)
49 (Baffle), 51 (Louver) 1,1 to 2,2 (10 to 20)
NOTE
Element
1....5 µm
2....25 µm
3....40 µm
Diaphragm
N....Non-relieving
R....Relieving
Spring (Outlet Pressure Range) *
F ....0,3 to 4 bar (5 to 60 psig)
M...0,3 to 10 bar (5 to 150 psig)
S....0,7 to 17 bar (10 to 250 psig)
Gauge
G....With
N....Without
IM-180.300.01
Supersedes 2/00
(11/11)
CAUTION
Water vapor will pass through these units and could
condense into liquid form downstream as air temperature
drops. Install an air dryer if water condensation could have
a detrimental effect on the application.
WARNING
These products are intended for use in industrial
compressed air systems only. Do not use these products
where pressures and temperatures can exceed those listed
under Technical Data.
Polycarbonate plastic bowls can be damaged and
possibly burst if exposed to such substances as certain
solvents, strong alkalies, compressor oils containing esterbased additives or synthetic oils. Fumes of these
substances in contact with the polycarbonate bowl,
externally or internally, can also result in damage. Clean
with warm water only.
Use metal bowl in applications where a plastic bowl
might be exposed to substances that are incompatible with
polycarbonate.
If outlet pressure in excess of the filter/regulator
pressure setting could cause downstream equipment to
rupture or malfunction, install a pressure relief device
downstream of the filter/regulator. The relief pressure and
flow capacity of the relief device must satisfy system
requirements.
The accuracy of the indication of pressure gauges can
change, both during shipment (despite care in packaging)
and during the service life. If a pressure gauge is to be
used with these products and if inaccurate indications may
be hazardous to personnel or property, the gauge should be
calibrated before initial installation and at regular intervals
during use.
Before using these products with fluids other than air,
for non industrial applications, or for life-support systems
consult Norgren.
B73G
Installation & Maintenance
Instructions
© Norgren 2011
IM-180.300.02
Supersedes 2/00
(11/11)
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