01/22
I&M/en 8.260.300.01
Our policy is one of continued research and development. We therefore reserve the right to amend,
without notice, the specifications given in this document. (1999 - I&M8093d) © 2020 IMI International s.r.o.
B68G, B68E Filter/Regulator
Installation & Maintenance Instructions
Fluid: Compressed air
Maximum pressure:
17 bar (250 psig)
Operating temperature*:
–20° ... +80°C (0° ... +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 at 10 bar (150 psig) inlet pressure,
6,3 bar (90 psig) set pressure and a droop of 1 bar (15
psig) from set: 240 dm3/s (509 scfm)
1/4 turn manual drain connection: 1/8“ pipe thread
Automatic drain connection: 1/8“ pipe thread
Automatic drain operating conditions:
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)
Manual operation: Depress pin inside drain outlet to
drain bowl
Nominal bowl size:
0,5 litre (1 pint U.S.), 1 litre (1 quart U.S.)
Gauge ports:
1/8 PTF with PTF yoke ports
Rc1/8 with ISO Rc yoke ports
Rc1/8 with ISO G yoke ports
Materials:
Body: Aluminium
Yoke: Aluminium
Bonnet: Aluminium
Adjusting knob: Acetal resin
Optional T-bar adjusting screw: Steel
Valve: Aluminium
Bowl: Aluminium
Sight glass: Pyrex
Element: Sintered bronze or polypropylene
Elastomers: Synthetic rubber
REPLACEMENT ITEMS
Service kit (items circled on exploded view)
Relieving 4383-300
Nonrelieving 4383-301
0.5 litre bowl liquid level lens
(19 thru 27)
4380-060
1 litre bowl liquid level lens
(30 thru 38)
4380-061
Filter element, 0.5 litre bowl, 5 µm
(54, 55, 56)
5576-97
Filter element, 0.5 litre bowl, 25 µm
(54, 55, 56 )
5576-98
Filter element, 0.5 litre bowl, 40 µm
(54, 55, 56)
5576-99
Filter element, 1 litre bowl, 5 µm (55)
5311-01
Filter element, 1 litre bowl, 25 µm (55)
5311-02
Filter element, 1 litre bowl, 40 µm (55)
5311-03
Automatic drain, G1/8 outlet (49)
3000-97
Automatic drain, 1/8 PTF outlet (49)
3000-10
Manual drain, spindle type (44)
684-84
Manual drain, 1/4 turn (40)
619-50
Tamper resistant cover and wire
4355-51
INSTALLATION
1. Install unit vertically in air line -
• with air flow in direction of arrow on top of yoke,
• upstream of lubricators and cycling valves,
• as close as possible to the device being serviced.
2. Connect piping to yoke ports using pipe
thread sealant on male threads only.
3. Install a pressure gauge in regulator or plug
gauge ports. Gauge ports can also be used as
additional outlets for regulated air.
4. Lubricate o-rings (15) with a light coat of
o-ring grease, then place o-rings in grooves in
body (14).
5. Place clamp ring under lugs on top of yoke.
6. Make sure arrows on yoke and regulator point
in same direction, then plug regulator into
yoke and tighten clamp ring hand tight.
7. Turn bowl into body until arrowhead on bowl
is aligned with or to the right of the arrowhead
on the body.
8. Flexible tube with 3mm (0.125”) minimum I.D.
can be connected to the automatic drain.
Avoid restrictions in the tube.
ADJUSTMENT
1. Before applying inlet pressure to
filter/regulator, turn adjustment (1 or 7)
counterclockwise to remove all force on
regulating spring (11).
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.
17
16
11
14
2
1
7
8
9
10
1
5
4
6
3
53
55
57
58
59
60
62
64
63
61
56
54
12
13
15
29
32
32
31
30
36
37
35
31
30
33
39
34
33
38
18
28
19
25
26
24
21
22
19
21
20
20
23
22
27
41
43
42
40
46
45
47
44
48
51
50
49
52
TECHNICAL FEATURES
* 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. *1) Available only with T-bar adjustment.
Port
6 3/4“
8 1“
A 1-1/4“
B 1-1/2“
N No yoke
Adjustment
K Knob
T T-bar
Diaphragm
R Relieving
N Non relieving
Drain
A Automatic
E
Closed bottom
M Manual, spindle type
Q Manual, 1/4 turn
Bowl
C 1 litre (1 quart U.S.)
No liquid indicator
M 0,5 litre (1 pint U.S.)
No liquid indicator
R 0,5 litre (1 pint U.S.)
With liquid indicator
U 1 litre (1 quart U.S.)
With liquid indicator
Element
1
5 µm
2
25 µm
3
40 µm
Thread
A PTF
B
ISO Rc tapered
G ISO G parallel
N No yoke (N in 5th position) Rc gauge ports.
A
No yoke (N in 5th position) PTF gauge ports
Spring (Outlet pressure range) *
F
0,3 ... 4 bar (5 ... 60 psig)
L
0,4 ... 8 bar (5 ... 120 psig)
S*1) 0,7 ... 17 bar (10 ... 250 psig)
Gauge
G With
N Without
B68
˙
–
˙˙˙
–
˙˙˙
–
˙˙˙
Bowl/
Element
E Long
G Short
Option selector
