Ingersoll-Rand RR250-F30 Setup guide

80174964
Edition 1
October 2005
Starter Relay Valve
RR250-F30
Installation and
Maintenance Information
Save These Instructions

280174964_ed1
WARNING
General Product Safety Information
• Important Safety Information enclosed.
• Read and understand this manual before operating this valve.
• It is your responsibility to make this safety information available to others that will operate this valve.
Safety Information - Explanation of Safety Signal Words
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury or property damage.
Indicates information or a company policy that relates directly or indirectly to the safety of
personnel or protection of property.
DANGER
WARNING
CAUTION
NOTICE
WARNING
Failure to observe the following warnings could result in injury
• Do not use this Starter Relay Valve with natural gas or other flammable gases.
• Always bleed off the air pressure before attempting to remove the Starter Relay Valve from the Receiver or before
attempting to perform any maintenance on the Starter Relay Valve.
• Never attempt to disassemble the Starter Relay Valve until after the air pressure has been bled off. Otherwise internal
parts of the Starter Relay Valve will be blown out with the great force.
• Always wear eye protection when installing, removing or performing maintenance on this Starter Relay Valve.
NOTICE
This Starter Relay Valve is specially designed and manufactured by Ingersoll-Rand for use on Starter installations.
Install it according to the following instructions:
Assembling Relay Valve on starter
The Relay Valve must be connected with two flanges SAE 3000 - DN 2” 1/2.
NOTICE
The use of other than genuine Ingersoll-Rand replacement parts may result in safety hazards, decreased starter relay
valve performance and increased maintenance and will invalidate all warranties.
Ingersoll-Rand is not responsible for customer modification of valve for applications on which Ingersoll-Rand was not
consulted.
Repairs should be made only by authorized, trained personnel. Consult your nearest Ingersoll-Rand Authorized
Servicenter.

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Specifications
(Dwg. 80183411)
2-1/2” ÆRR250-F30 - Order part number 16675845
ILLUSTRATION REQUIRED
Max. Inlet Pressure 30 Bar 435 psi
Max. Outlet Pressure 10 Bar 145 psi
Max. Flow 1600 dm3/s 3400 scfm
Max. Temperature 80°C 176°F
Min. Temperature -25°C -13°F

480174964_ed1
Description
The RR250-F30 includes valve and regulator functions.
The RR250 is made of three main components:
1. The master regulator which sets the pilot pressure.
2. The solenoid valve which will open or close the system
when the operator actuates the switch key.
3. The slave regulator which is the main body.
(Dwg. 80177892)
The slave regulator (3) will receive the signal from the master
regulator (1) through the solenoid valve (Fig 2). For
pre-engage Starters (Fig 1) the signal pressure will come
from the master regulator through the solenoid valve to the
pilot “In” port of the air starter drive housing, giving the signal
to engage the drive pinion into the ring gear. After engaging
the drive pinion it will come out through the “Out” port of the
drive housing and will go to the top cover of the slave
regulator.
(Dwg. 80177900)
The Slave regulator using the pressure signal on top of the
diaphragm will force the piston off its seat. That allows air to
flow into control chamber below the diaphragm, through the
outlet port of the RR250 valve to the starter motor. Outlet
pressure increases in the downstream system and sensing
chamber (under the diaphragm) and applies an upward force
on the bottom of the diaphragm. The diaphragm and piston
move upward. Upward movement stops when the forces
below the diaphragm balance the force above the
diaphragm.
(Dwg. 80177959)
(Dwg. 80177991)
23
1
Figure 1 Figure 2

80174964_ed1 5
Operation
Clockwise rotation of screw (1) will open the seat in the
master regulator and will increase the pressure between the
master regulator and solenoid valve (4). Do not try to exceed
11 bar or 160 psig. The pressure you adjust at the slave
regulator will be slightly higher than the working pressure at
the starter. In order to easily adjust the working pressure
install a gauge on port (2).
(Dwg. 80177215)
The master pressure regulator is designed as a relieving
regulator. When the pressure below the diaphragm reaches
1.5 bars over the adjusted pressure, the regulator exhausts
the excess pressure.
Schematic
For inertia drive applications:
For pre-engaged drive applications:
(Dwg. 80177223)
14
2

680174964_ed1
Relay Valve Assembly Drawing
(Dwg. 80177843)
Relay Valve Parts List
33
126
25
31
30
24
29
20
9
10
5
12
16
14
19
18
17
15
13
11
6
28
32
27
4
3
2
Item Parts Description Part Number Item Parts Description Part Number
1 Cover Screw (10) 38632121 29 Plug 118126
2 Diaphragm Cover 38747887 30 Plug 80162225
3 Diaphragm 38747895 31 Nipple 80162233
4 Diaphragm Support 38747853 32 Nipple 80162217
6 Housing 38747788 33 Adapter 38754933
9 Set Screw 80172745 * Piston Kit 38750956
10 Ring 38749990 (For RR250-F30)
18 Bottom Cover 38747796 Stem - Item no. 5
19 Bottom Cover Screw (8) 38632121 Plate - Item no. 12
20 Plug 38648192 Piston Assembly - Item no. 13
24 Mini Regulator 10548774 O-ring - Item no. 14
25 Operator and Coil 49828460 Locknut - Item no. 15
26 Solenoid Valve 49828692 Spring - Item no. 16
27 Flange Seal 38752366 O-ring - Item no. 11
28 Filter 38752333 O-ring - Item no. 17

80174964_ed1 7
Maintenance
Disassembly of Relay Valve
1. Remove screws (1). Remove cover (2) and
diaphragm (3).
2. WARNING: Bottom cover (18) is spring-loaded.
Clamp relay valve in arbor press before removing
bottom screws (19). Otherwise personal injury or
damage to parts may occur. Secure relay valve upside
down in arbor press, applying force to bottom cover.
3. Remove screws (19). Slowly raise arbor press to remove
cover (18).
4. To remove stem piston assembly: Hold diaphragm
support (4) with a spanner wrench. Turn locknut (15) with
a socket to unscrew the stem from the diaphragm
support.
5. If the locknut comes loose before the diaphragm support,
separate the piston (13), plate (12) and stem (5). Hold the
stem on the flats and unscrew the diaphragm support.
Assembly of Relay Valve
Apply Parker O-Lube grease to O-rings (11), (14), and (17),
and spring (16).
Clean with isopropyl alcohol and apply Loctite® 242 or 243 to
screws (1), screws (19), and diaphragm support (4).
1. Insert stem (5) of stem/piston assembly through ring (10)
and O-ring (11) in housing (6).
2. Tighten diaphragm support (4) on stem piston assembly
to 7.9/6.7 Nm (70/60 inch-Lbs) by holding locknut (15).
3. WARNING: Bottom cover (18) is spring-loaded.
Clamp relay valve in arbor press before installing
bottom screws (19). Otherwise personal injury or
damage to parts may occur. Secure relay valve upside
down in arbor press. Align bottom cover and apply force
to bottom cover.
4. Install eight screws (19). Tighten to 30/26 Nm
(270/230 inch-Lbs).
5. Install diaphragm (3) and cover (2).
6. Install twelve screws (1). Tighten to 25/20 Nm
(220/180 inch-Lbs).

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