R18
Installation & Maintenance
Instructions
6. Install a Norgren muffler (see
Replacement Parts
) in the
exhaust port of the R18 regulator. Installation of a muffler
will reduce work area noise and protect R18 internal parts
from contamination.
Warning
Do not plug exhaust port of relieving type regulators.
Relief feature will fail if exhaust port is plugged.
ADJUSTMENT
1. Before applying inlet pressure to regulator, turn pilot
regulator adjustment counterclockwise to remove all force
on regulating spring.
2. Apply inlet pressure, then turn pilot regulator adjustment
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.
NOTE
With non-relieving regulators, make pressure
reductions with some air flow in the system. If made
under no flow (dead-end) conditions, the regulator
will trap the over-pressure in the downstream line.
DISASSEMBLY
1. Regulator can be disassembled without removal from air
line.
2. Shut off inlet pressure to pilot regulator and to the R18.
Reduce pressure in inlet and outlet lines to zero.
3. Turn pilot regulator adjustment counterclockwise to remove
all force on regulating spring.
4. Disassemble the R18 in general accordance with the item
numbers on exploded view.
CLEANING
1. Clean parts with warm water and soap
2. Rinse and dry parts. Blow out internal passages in body
(22) with clean, dry compressed air.
3. Inspect parts. Replace those found to be damaged.
ASSEMBLY
Note
Early and current diaphragms (16, 17) are not
interchangeable. When replacing a diaphragm, make
sure the new one is identical to the used one. In
addition, the bonnet (11) used with the current
diaphragm (17) has a hole drilled on the inside to accept
the upper piston on the diaphragm.
1. Lubricate o-rings and surfaces in contact with o-rings with
a light coat of good quality o-ring grease.
2. Lubricate threads on bottom plug (24) with a small amount
of anti-seize compound.
3. Assemble the unit as shown on the exploded view. Hold
diaphragm (16, 17) against upper travel limit, then apply
increasing torque to the 10 bonnet screws in a crisscross
pattern. Apply final torque of 13,6 to 14,7 Nm (120 to 130
inch-pounds). Tighten bottom plug (24) hand tight.
TECHNICAL DATA
Fluid: Compressed air
Inlet pressure range: 0,7 bar (10 psig) minimum to 31
bar (450 psig) maximum
Operating temperature: -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).
Typical flow with 0,7 bar (100 psig) inlet pressure, 6,3
bar (90 psig) set pressure, and a droop of 1 bar
(15 psig) from set: 944 dm
3
/s (2000 scfm)
Gauge and pilot ports:
1/4
"
PTF with PTF main ports
G1/4 with ISO G main ports
R1/4 with ISO Rc main ports
Exhaust port:
3/4
"
PTF with PTF main ports
G3/4 with ISO G main ports
R3/4 with ISO Rc main ports
Materials:
Body, Bonnet,Bottom Plug, Valve: Aluminum
Elastomers: Nitrile
REPLACEMENT ITEMS
R18 service kit (items circled exploded view)..........5945-40
Exhaust muffler
3/4 PTF ...............................................................MB006A
R3/4 .....................................................................MB006B
INSTALLATION
1. Shut off air pressure. Install regulators in air line -
●
upstream of lubricators and cycling valves.
●
at any angle.
●
install the R18 pilot operated regulator as close as
possible to the device being serviced.
●
install the pilot regulator at any convenient, accessible
location.
2. Use pipe thread sealant on male threads only when
making the following pipe connections. Do not allow
sealant to enter interior of regulators.
●
Connect inlet and outlet air lines to R18 main ports
with air flow in direction of arrow on body.
●
Connect inlet and outlet air lines to pilot regulator main
ports. The inlet port of the R40 and R41 is marked
IN
,
and the outlet port is marked
OUT
. The direction of air
flow thru the 11-104 pilot is indicated by an arrow on
the bottom of the body. If desired, inlet air for the pilot
regulator may be tapped from the R18 regulator at the
R18 port marked
PRI
. When the
PRI
port is used to
supply air to the pilot regulator, inlet pressure to the
R18 must not exceed the maximum rated pressure of
the pilot regulator.
●
Connect the outlet of the pilot regulator to the port
marked
PILOT
on the R18 regulator. This is the pilot
pressure line.
3. Special Instructions for a Feedback Pilot Regulator:
Connect one end of the feedback line to the feedback port
on the pilot regulator. The feedback port on the R41 is
marked
FDBK
. The 11-104 has two 1/8" PTF feedback
ports. Plug the unused feedback port. Connect the other
end of the feedback line to a gauge port on the R18 or, if
maximum precision pressure regulation is desired, to the
application point downstream of the R18. Keep the
feedback line as short as possible and unrestricted. Use
1/4" or 3/8 "OD copper tube for the feedback line. Plug
unused gauge ports.
Warning - Feedback Pilot Regulators
Norgren manufacturers two feedback pilot regulator
types (the R41 and the 11-104). Use the R41, the 11-
104-002, or the 11-104-003 feedback pilot regulator to
control outlet pressures greater than 100 psig (7 bar).
Use the Norgren 11-104-001 feedback pilot regulator
to control outlet pressures at or less than 100 psig (7
bar).
The feedback line must sense R18 outlet pressure
and must be connected before turning on air pressure.
If the feedback line is not connected, R18 outlet
pressure will rapidly increase to inlet pressure when
the feedback pilot adjusting knob is turned clockwise.
4. Install a pressure gauge in a gauge port on the R18, or to the
application point downstream of the R18. Do not connect the
gauge to the pilot pressure line, as this pressure is not the
same as the R18 outlet pressure. Locate the gauge next to
the pilot regulator. Plug unused gauge ports.
5. Install a general purpose filter upstream of the regulator.
© Norgren 2001
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a subsidiary of IMI plc
IM-350.230.01
(5/01)
Pilot Operated Regulator
R18 -
★
00 -
★★
X
★
Thread Form
A....PTF
B....ISO Rc taper
G....ISO G parallel
Port
B....1-1/2"
C....2"
Relief Type
R....Relieving
N....Non relieving *
Gauge
G....With
N....Without
* Do not use a feedback type pilot regulator with a non relieving R18 regulator.
Pilot
Pressure
Line
R18 PILOT
OPERATED
REGULATOR
R40 CONVENTIONAL
PILOT REGULATOR
Inlet Air
Outlet
Air
Inlet Air
Pilot
Pressure
Line
Feedback
Line
R41 FEEDBACK
PILOT REGULATOR
R18 PILOT
OPERATED
REGULATOR
11-104 FEEDBACK
PILOT REGULATOR
Feedback
Line
Pilot Pressure Line
Inlet
Air
Inlet Air
Outlet
Air
Inlet
Air
Figure 2. Conventional Pilot Installation
Figure 1. Feedback Pilot Installation
