Pilot Operated Regulator
R18 - 00 - X
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Port |
Relief Type |
Gauge |
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B.... |
1-1/2" |
R.... |
Relieving |
G.... |
With |
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C.... |
2" |
N.... |
Non relieving * |
N.... |
Without |
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* Do not use a feedback type pilot regulator with a non relieving R18 regulator.
TECHNICAL DATA |
6. Install a Norgren muffler (see Replacement Parts) in the |
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Fluid: Compressed air |
exhaust port of the R18 regulator. Installation of a muffler |
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Inlet pressure range: 0,7 bar (10 psig) minimum to 31 |
will reduce work area noise and protect R18 internal parts |
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bar (450 psig) maximum |
from contamination. |
Warning |
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Operating temperature: -34° to +80°C (-30° to |
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+175°F). Air supply must be dry enough to avoid |
Do not plug exhaust port of relieving type regulators. |
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ice formation at temperatures below +2°C (+35°F). |
Relief feature will fail if exhaust port is plugged. |
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Typical flow with 0,7 bar (100 psig) inlet pressure, 6,3 |
ADJUSTMENT |
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bar (90 psig) set pressure, and a droop of 1 bar |
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1. Before applying inlet pressure to regulator, turn pilot |
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(15 psig) from set: 944 dm3/s (2000 scfm) |
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regulator adjustment counterclockwise to remove all force |
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Gauge and pilot ports: |
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on regulating spring. |
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1/4" PTF with PTF main ports |
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2. Apply inlet pressure, then turn pilot regulator adjustment |
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G1/4 with ISO G main ports |
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clockwise to increase and counterclockwise to decrease |
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R1/4 with ISO Rc main ports |
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pressure setting. |
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Exhaust port: |
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3. Always approach the desired pressure from a lower |
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3/4" PTF with PTF main ports |
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pressure. When reducing from a higher to a lower setting, |
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G3/4 with ISO G main ports |
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first reduce to some pressure less than that desired, then |
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R3/4 with ISO Rc main ports |
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bring up to the desired pressure. |
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Materials: |
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NOTE |
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Body, Bonnet,Bottom Plug, Valve: Aluminum |
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With non-relieving regulators, make pressure |
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Elastomers: Nitrile |
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reductions with some air flow in the system. If made |
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REPLACEMENT ITEMS |
under no flow (dead-end) conditions, the regulator |
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R18 service kit (items circled exploded view)..........5945-40 |
will trap the over-pressure in the downstream line. |
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Exhaust muffler |
DISASSEMBLY |
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3/4 PTF ...............................................................MB006A |
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1. Regulator can be disassembled without removal from air |
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R3/4 .....................................................................MB006B |
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line. |
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INSTALLATION |
2. Shut off inlet pressure to pilot regulator and to the R18. |
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1. Shut off air pressure. Install regulators in air line - |
Reduce pressure in inlet and outlet lines to zero. |
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● upstream of lubricators and cycling valves. |
3. Turn pilot regulator adjustment counterclockwise to remove |
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● at any angle. |
all force on regulating spring. |
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● install the R18 pilot operated regulator as close as |
4. Disassemble the R18 in general accordance with the item |
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possible to the device being serviced. |
numbers on exploded view. |
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● install the pilot regulator at any convenient, accessible |
CLEANING |
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location. |
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1. Clean parts with warm water and soap |
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2. Use pipe thread sealant on male threads only when |
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2. Rinse and dry parts. Blow out internal passages in body |
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making the following pipe connections. Do not allow |
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(22) with clean, dry compressed air. |
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sealant to enter interior of regulators. |
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3. Inspect parts. Replace those found to be damaged. |
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● Connect inlet and outlet air lines to R18 main ports |
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ASSEMBLY |
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with air flow in direction of arrow on body. |
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Note |
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● Connect inlet and outlet air lines to pilot regulator main |
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ports. The inlet port of the R40 and R41 is marked IN, |
Early and current diaphragms (16, 17) are not |
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and the outlet port is marked OUT. The direction of air |
interchangeable. When replacing a diaphragm, make |
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flow thru the 11-104 pilot is indicated by an arrow on |
sure the new one is identical to the used one. In |
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the bottom of the body. If desired, inlet air for the pilot |
addition, the bonnet (11) used with the current |
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regulator may be tapped from the R18 regulator at the |
diaphragm (17) has a hole drilled on the inside to accept |
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R18 port marked PRI. When the PRI port is used to |
the upper piston on the diaphragm. |
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supply air to the pilot regulator, inlet pressure to the |
1. Lubricate o-rings and surfaces in contact with o-rings with |
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R18 must not exceed the maximum rated pressure of |
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a light coat of good quality o-ring grease. |
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the pilot regulator. |
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2. Lubricate threads on bottom plug (24) with a small amount |
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● Connect the outlet of the pilot regulator to the port |
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of anti-seize compound. |
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marked PILOT on the R18 regulator. This is the pilot |
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3. Assemble the unit as shown on the exploded view. Hold |
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pressure line. |
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diaphragm (16, 17) against upper travel limit, then apply |
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3. Special Instructions for a Feedback Pilot Regulator: |
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increasing torque to the 10 bonnet screws in a crisscross |
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Connect one end of the feedback line to the feedback port |
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pattern. Apply final torque of 13,6 to 14,7 Nm (120 to 130 |
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on the pilot regulator. The feedback port on the R41 is |
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inch-pounds). Tighten bottom plug (24) hand tight. |
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marked FDBK. The 11-104 has two 1/8" PTF feedback |
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ports. Plug the unused feedback port. Connect the other |
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end of the feedback line to a gauge port on the R18 or, if |
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11-104 FEEDBACK |
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maximum precision pressure regulation is desired, to the |
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Inlet |
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PILOT REGULATOR |
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application point downstream of the R18. Keep the |
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Air |
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feedback line as short as possible and unrestricted. Use |
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Feedback |
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1/4" or 3/8 "OD copper tube for the feedback line. Plug |
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Line |
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unused gauge ports. |
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Warning - Feedback Pilot Regulators |
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Pilot Pressure Line |
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Norgren manufacturers two feedback pilot regulator |
Inlet |
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types (the R41 and the 11-104). Use the R41, the 11- |
Air |
R41 FEEDBACK |
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104-002, or the 11-104-003 feedback pilot regulator to |
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PILOT REGULATOR |
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control outlet pressures greater than 100 psig (7 bar). |
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Use the Norgren 11-104-001 feedback pilot regulator |
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to control outlet pressures at or less than 100 psig (7 |
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Feedback |
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bar). |
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Line |
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The feedback line must sense R18 outlet pressure |
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Pilot |
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and must be connected before turning on air pressure. |
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Inlet |
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Pressure |
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If the feedback line is not connected, R18 outlet |
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Air |
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Line |
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pressure will rapidly increase to inlet pressure when |
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the feedback pilot adjusting knob is turned clockwise. |
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4. Install a pressure gauge in a gauge port on the R18, or to the |
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application point downstream of the R18. Do not connect the |
R18 PILOT |
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gauge to the pilot pressure line, as this pressure is not the |
OPERATED |
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same as the R18 outlet pressure. Locate the gauge next to |
REGULATOR |
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the pilot regulator. Plug unused gauge ports. |
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5. Install a general purpose filter upstream of the regulator. |
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Outlet |
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Air |
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© Norgren 2001 |
Figure 1. Feedback Pilot Installation |
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a subsidiary of IMI plc
R18
Installation & Maintenance
Instructions
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Thread Form |
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A....PTF |
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B....ISO Rc taper |
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G....ISO G parallel |
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8 |
7 |
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10 |
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9 |
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11 |
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12 |
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13 |
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14 |
15 |
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16 |
18 |
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17 |
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19 |
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21 |
22 |
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29 |
33 |
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30 |
31 |
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32 |
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27 |
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26 |
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25 |
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24 |
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23 |
Inlet Air |
R40 CONVENTIONAL |
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PILOT REGULATOR |
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Pilot |
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Pressure |
Inlet Air |
Line |
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R18 PILOT |
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OPERATED |
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REGULATOR |
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Outlet |
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Air |
Figure 2. Conventional Pilot Installation
IM-350.230.01 (5/01)
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