Norgren B38 Installation and operating instructions

* 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.
Stainless Steel Instrument Filter/Regulator
B38 - 2★★ - ★★★★
B38
Installation & Maintenance
Instructions
Material
4....Stainless steel
(standard)
5....Stainless steel and
Viton
ADJUSTMENT
1. Before applying inlet pressure to filter/regulator, turn
adjustment (2) counterclockwise to remove all force on
regulating spring (7).
2. Apply inlet pressure, then turn adjustment (2) clockwise
to increase and counterclockwise to decrease outlet
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.
NOTE
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. Once required pressure is achieved tighten locknut (3) to
lock setting.
SERVICING
1. For manual drain models, regularly open drain to expel
accumulated liquids. Keep liquids below element retainer
(13).
2. At approximately 6 month intervals it is advisable to
remove the bowl assembly by removing the securing
screws (4) and unscrewing the element retainer (13) to
remove the element (15) for inspection.
Since the direction of air flow is from the inside of the
element to the outside, a clean exterior is not an an
indication of freedom from contamination.
If the filter element shows evidence of blockage, replace
with new element.
Clean the element retainer (13) and the upper and lower
gaskets (14) before replacing the filter element –
avoiding excessive overtightening of the retainer.
Inspect the bowl O-ring (16) for damage and renew if
necessary.
3. 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 screw fully counterclockwise.
4. 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. Rinse and dry parts. Blow out internal passages in body
(30) with clean, dry compressed air. Blow air through
filter element (15) from inside to outside to remove
surface contaminants.
2. Inspect parts. Replace those found to be damaged.
ASSEMBLY
1. Lubricate threads and nose of adjusting screw (2) at
regular intervals with suitable grease eg. Speerol APT2.
2. Lubricate seals (16, 36, 37) with light coat of good
quality grease.
2. Assemble the unit as shown on the exploded view.
3. Torque Table
Item Torque in
Nm (Inch-Pounds)
4 (screws, stainless steel model) 7,3/3,3 (66/30)
TECHNICAL DATA
Fluid: Compressed air
Maximum pressure:
Stainless steel
Manual drain: 31 bar (450 psig)
Automatic drain: 17 bar (245 psig)
Operating temperature*:
-40° to +80°C (-40° to +176°F)
* Air supply must be dry enough to avoid ice formation at
temperatures below +2°C (+35°F).
Particle removal: 5 µm or 25 µm filter element
Air quality: Within ISO 8573-1, Class 3 and Class 5
(particulates)
Typical flow with 7 bar (100 psig) inlet pressure, 1 bar
(15 psig) set pressure and 0,05 bar (1 psig) droop from
set: 8 dm3/s (17 scfm)
Automatic drain connection: 1/4" PTF
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: 1 dm3/s
(2 scfm)
Gauge ports:
1⁄4" as per main ports
Materials:
Body: Stainless steel
Bonnet: Stainless steel
Bowl: Stainless steel
Adjusting screw: Stainless steel
Element
5 µm: Stainless steel
25 µm: Vyon
Elastomers: Synthetic rubber
Diaphragm insert: Acetal resin, stainless steel and nitrile
Other parts stainless steel
REPLACEMENT ITEMS (standard option)
Service Kit (includes items circled on exploded view):
Relieving
2 bar..................................................................R38-100R
4 & 7 bar ...........................................................R38-101R
10 bar................................................................R38-102R
Non relieving
2 bar ...............................................................R38-100NR
4 & 7 bar.........................................................R38-101NR
10 bar .............................................................R38-102NR
Filter section
5 µm stainless steel......................................B38100S(5)
25 µm stainless steel....................................B38100S(25)
5 µm viton and stainless steel......................B38150S(5)
25 µm stainless steel....................................B38150S(25)
Auto drain (replacement) .........................................3000-90
PANEL MOUNTING DIMENSIONS
Panel mounting hole diameter: 42 mm (1,65")
Panel thickness: 0 to 6 mm (0" 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. Install a pressure gauge or plug the gauge ports. Gauge
ports can also be used as additional outlets for regulated
air.
IM-510.315.01 (1/99)
a subsidiary of IMI plc
© Norgren 1999
Port
2....1/4"
Spring (Outlet Pressure Range) *
C....0,04 to 2 bar (0.6 to 30 psig)
F ....0,07 to 4 bar (1 to 60 psig)
K....0,25 to 7 bar (3,6 to 100 psig)
M...0,5 to 10 bar (7.2 to 150 psig)
Thread Form
A....PTF
B....ISO Rc taper
D....ISO G
K....API
Drain
A....Automatic
B....Manual
Element
1....5 µm
2....25 µm
1
2
3
4
5
6
7
8
38
32
36
37
30
16
14
15
14
13
11
17
19
4
4
20
21
18
33
34
35
Options
0....Stainless steel, relieving
1....Stainless steel, non-relieving
2....Stainless steel, relieving with bracket and panel nut
3....Stainless steel, non-relieving with bracket and panel nut
4....Stainless steel, relieving with panel nut
5....Stainless steel, non-relieving with panel nut
6....Stainless steel, relieving with handwheel and panel nut
7....Stainless steel, non-relieving with handwheel and panel nut
8....Stainless steel, relieving with handwheel, bracket and panel nut
9....Stainless steel, non-relieving with handwheel, bracket and panel nut

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 .
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.
IM-510.315.02 (1/99)
a subsidiary of IMI plc
© Norgren 1999
B38
Installation & Maintenance
Instructions