01/22
I&M/en 8.240.200.01
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&M8078d) © 2020 IMI International s.r.o.
R64G 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).
Typical ow with 10 bar (150 psig) inlet pressure,
6,3 bar (90 psig) set pressure and 1 bar
(15 psig) droop from set: 120 dm3/s (254 scfm)
Gauge ports:
1/8“ PTF with PTF main ports
1/8“ ISO Rc with ISO Rc main ports
1/8“ ISO Rc with ISO G main ports
Materials:
Body: Zinc
Bonnet: Aluminium
Valve: Brass
Elastomers: Synthetic rubber
REPLACEMENT ITEMS
Service kit, contains required items circled:
Relieving 4381-200
Non relieving 4381-201
Panel Mounting Dimensions
Panel mounting hole diameter: 52 mm (2.06“)
Panel thickness: 6 mm (0.25“) max.
INSTALLATION
1. Install unit vertically in air line -
• upstream of lubricators and cycling valves,
• with air ow in direction of arrow on body,
• as close as possible to the device being serviced.
2. Before assembling the basic unit into the yoke the
port seal o-rings should be lightly smeared with
o-ring grease.
3. Locate clamp ring under lugs on top of yoke, offer
basic unit into yoke with directional arrows correct-
ly aligned (an interference t prevents assembly if
misaligned) before
engaging and fully tightening the clamp ring.
4. Install a pressure gauge or plug the gauge ports.
Gauge ports can also be used as additional outlets
for regulated air.
A B C
ADJUSTMENT
1. Before applying inlet pressure to regulator,
turn adjustment (1 or 6) counterclockwise to
remove all force on regulating spring (11).
2. Apply inlet pressure, then turn adjustment (1 or
6) 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, rst reduce to some
pressure less than that desired, then bring up
to the desired pressure.
NOTE
With non-relieving regulators, make pressure reduc-
tions with some air ow in the system. If made under
no ow (dead-end) conditions, the 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 (7) to lock
pressure setting.
DISASSEMBLY
1. Shut off inlet pressure. Reduce pressure in
inlet and outlet lines to zero. Turn adjustment
(1 or 6) fully counterclockwise.
2. For ease of maintenance the unit can be removed
from the yoke by unscrewing the clamp ring, which
will jack the unit out downwards.
3. Disassemble in general accordance with the item
numbers on exploded view.
4. To disassemble turn the adjuster (1 or 6) coun-
ter-clockwise to relieve compression on the
adjusting spring (11). Remove 4 screws (2 or 8) to
disassemble the bonnet (3 or 9) from the body.
Remove the adjusting spring (11) and diaphragm
(12). Inspect all components for damage, foreign
matter and cleanliness and reassemble using
service replacement parts where necessary.
CLEANING
1. Clean parts with warm water and soap.
2. Rinse and dry parts. Blow out internal passages in
body with clean, dry compressed air.
3. Inspect parts. Replace those found to be damaged.
ASSEMBLY
1. Lubricate o-rings with o-ring grease.
2. Check valve for free movement in the valve guide.
3. Assemble the unit as shown on the exploded view.
4. Torque Table
Torque in
Item N-m (Inch-Pounds)
3, 9 (Bonnet) 61 ... 68 (555 ... 618)
TECHNICAL FEATURES
Option selector
Port
2 1/4”
3 3/8“
4 1/2“
6 3/4
Gauge
G With
N Without
Thread
A PTF (1/8 PTF gauge ports)
B ISO Rc taper (1/8 ISO Rc gauge ports)
G ISO G parallel (1/8 ISO Rc gauge ports)
R64G – ˙˙˙ – ˙˙˙
Diaphragm
R Relieving
N Non relieving
Adjustment
K Knob
T T-bar Spring (Outlet pressure range) *
F 0,3 ... 4 bar (3 ... 60 psig)
M 0,3 ... 10 bar (3 ... 150 psig)
S *1) 0,7 ... 17 bar (10 ... 250 psig)
* Outlet pressure can be adjusted to pressures in excess of, and less than, those specied. Do not use these units to control pressures outside of the specied ranges.
*1) Units with 17 bar (250 psig) adjustment range are available only with the T-bar adjustment, therefore substitute T at the 7th digit and S at the 12th position.
7
1
2
6
9
10
11
12
14
16
13
19
17
18
4
3
5
8
20
15
