ST950BP03R31 Turbine Air Starter | Half Arc w/Elbow Exhaust (60-150 PSI) | by Ingersoll Rand

ST950BP03R31 Turbine Air Starter | Half Arc w/Elbow Exhaust (60-150 PSI) | by Ingersoll Rand

SKU:: ST950BP03R31
UPC:

Price: $4,738.16

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Description

Description

The Ingersoll Rand ST950BP03R31 is a genuine IR ST900-series pre-engaged turbine air starter. It delivers up to 55 hp (41 kW) and 250 ft-lb of breakaway torque at 150 psi, and Ingersoll Rand rates B-ratio ST700/ST900 starters for diesel engines from 16 to 130 liters. It has a half-arc (90 to 150 psi) turbine, an SAE No. 3 flange and a right-hand 12-tooth 6/8 pitch pinion. Ingersoll Rand's current replacement in this size is the ST1000 series.

ST950BP03R31 Specifications

Ingersoll Rand ST950BP03R31 technical data
Manufacturer / series	Ingersoll Rand ST900 series (ST950)
Motor type	Turbine, 50% (half) arc, lube-free; sealed, oil-lubricated planetary gears
Engagement	Pre-engaged
Maximum power	55 hp (41 kW) at 150 psi
Breakaway torque	160 ft-lb (217 N·m) at 90 psi / 250 ft-lb (339 N·m) at 150 psi
Operating pressure	90 to 150 psi (6.2 to 10.3 bar)
Drive medium	Compressed air or natural gas (sealed)
Gear ratio	"B" gearing, 2.18:1
Mounting	SAE No. 3 flange
Pinion (code 31)	12 teeth, 6/8 pitch, right-hand
Rotation	right-hand (R)
Air inlet / exhaust	1-1/2 in. type J518C flange inlet (ST700-K166 inlet flange kit) / 4 in. NPT exhaust
Air consumption	1,300 scfm at maximum power
Recommended engine size	Diesel engines from 16 to 130 L
Extended cranking (over 10 s)	Yes: IR rates the ST900 series for extended cranking
Orientations	4 inlet, 4 exhaust and 16 drive-housing positions
Weight	63 lb (28.6 kg)
Lubrication	None required for the turbine motor

Performance by Supply Pressure

Ingersoll Rand publishes these figures for the ST950 with B gearing (pre-engaged):

Supply pressure	Breakaway torque	Speed at max power	Max power	Flow at max power
90 psi (6.2 bar)	160 ft-lb (217 N·m)	1,950 rpm	30 hp (22 kW)	850 scfm (401 L/s)
120 psi (8.3 bar)	225 ft-lb (305 N·m)	2,100 rpm	45 hp (34 kW)	1,100 scfm (519 L/s)
150 psi (10.3 bar)	250 ft-lb (339 N·m)	2,350 rpm	55 hp (41 kW)	1,300 scfm (614 L/s)

ST950BP03R31 Dimensions

Dimension	Inches	Millimeters
Overall length to mounting flange	19-7/32	488.2
Inlet centerline to mounting flange	14-21/64	363.9
Drive projection beyond flange	2-19/64	58.3
Height	9-5/8	244.5
Width	6-7/8	174.6

Reference dimensions from Ingersoll Rand. Confirm critical clearances against the certified drawing before you fabricate brackets or plumbing.

Engines That Use the ST950BP03R31

Our Air Starter Model Finder, built from Ingersoll Rand application data, lists the ST950BP03R31 for:

Waukesha: 5108G (SI/L) (95 L), 5115GL (84 L), 5790G (SI/L) (95 L), 6LAT25GL (88.36 L), 6LK (39.43 L), 6LRO (47.42 L), 6LS (32.15 L), 7042G (SI/L) (115 L), 8LAT25D (117.81 L), 8LAT25GL (117.81 L), and more
CES-Superior: 12-GTL (B) (162 L), 12-SGT (B) (162 L), 12G-825 (162 L), 16-GTL (B) (216 L), 16-SGT (B) (216 L), 16G-825 (216 L), 6G-825 (81 L), 6GT-825 (81 L), 6GT510 (50.1 L), 6GX510 (50.1 L), and more
Dresser-Rand: 10SVG (226.55 L), 10TVR (221.22 L), 10TVS (193.37 L), 6SVG (135.93 L), 6TVR (132.73 L), 8SVG (181.24 L), 8TVR (176.98 L), 8TVS (154.86 L), PSVG-10 (226.55 L), PSVG-12 (271.86 L), and more
Caterpillar: 3512 (51.8 L), 3516 (69 L), G-398 (48.3 L), G-399 (64.4 L), G3512 (51.8 L), G3516 (69 L), G3606 (110.8 L), G3608 (147.8 L), G3612 (221.7 L), G3616 (295.6 L)
Alco: 244 (131.4 L), 251 (65.7 L), 251 (87.6 L)
MEP: MEP12 (203.9 L), MEP6 (102 L), MEP8 (135.9 L)
Climax: V125 (60.8 L)
Cummins: CTA-38P

Engine builders change ring gears and starter pads between serial ranges, so confirm the ring gear and rotation before you order. Look up your engine in our Air Starter Model Finder, or call us with the engine model and serial number.

How to Read the Model Number

Code	Meaning
ST9	ST900 series turbine starter
50	Percent arc: 50% (half arc, 90 to 150 psi)
B	Gear ratio 2.18:1 (B = 2.18:1, C = 2.53:1)
P	Pre-engaged (I = inertia)
03	SAE No. 3 flange (09 = IR "09" flange for D ratio)
R	right-hand rotation
31	Pinion: 12-tooth 6/8 pitch

Why Choose the ST950BP03R31?

High torque, broad range. B and C gearing options cover a wide range of starting torques.
Lube-free turbine. No lubricator and no oil mist; sealed planetary gears are maintenance free.
Air or natural gas. Sealed for gas and air applications.
Proven design. The ST700/900 turbine family has powered diesel and gas engines in marine, oil and gas, locomotive and power generation service.
Current replacement available. Ingersoll Rand's ST1000 series is the direct successor.

ST950BP03R31 FAQ

What is the opposite-rotation version of the ST950BP03R31?

The ST950BP03L32 is the opposite-rotation counterpart. Power, flange and gearing are the same; only the rotation and the matching pinion code differ. Match the rotation printed on your existing starter's nameplate.

Is this starter still available, and what replaces it?

Ingersoll Rand's ST1000 series supersedes the ST700 and ST900 (the ST750 and ST950 go to the ST1060, and the ST799 and ST999 go to the ST1099, with the same ratio, drive, flange and pinion). Call us and we will confirm current availability of the ST950BP03R31 and quote the ST1000 alternative side by side. See the ST1000 series.

Can it crank for a long time?

Yes. Ingersoll Rand rates the ST900 series for extended cranking.

What air supply and accessories does it need?

Supply 90 to 150 psi through a 1-1/2 in. line, with enough receiver volume to deliver up to 1,300 scfm while the engine cranks. Ingersoll Rand's matching accessories include the SRV150 relay valve (SRV150SS for gas), the ST900-267-24 1-1/2 in. strainer (300 mesh), 150BMP-1051B / 150BMP-2451B solenoid valves and SMB-618 / SMB-G618 push-button valves.

Buy from a Factory-Authorized Ingersoll Rand Distributor

AirStartersDirect.com is a factory-authorized Ingersoll Rand distributor operated by Zampini Industrial Group, which has supplied engine starting equipment since 1987. Every ST950BP03R31 we sell is new, genuine Ingersoll Rand equipment. We supply the ST700 and ST900 series, the current ST1000 series, and the relay valves, strainers and tune-up kits that go with them.

Need help confirming fit? Call 1-800-353-4676 with your engine make, model and serial number for a fast quote and free selection help.

Specifications source: Ingersoll Rand Engine Starting Systems catalog and Ingersoll Rand ST900 Series Air Starters.

Ingersoll Rand pneumatic air starters can replace any factory mounted starter engine and simultaneously offer a variety of helpful benefits. Compared to conventional electric starters, a pneumatic air starter occupies considerably less space as it is run by air. Pneumatic air starters are also considered safer in hazardous environments as they do not produce electrical sparks like electric starters sometimes do, thus eliminating the risk of igniting flammable materials that may be present.

Ingersoll Rand air starters have significantly more torque than electric starters of equivalent size, and that allows even a small air starter to start very large engines and turbines. In addition, electric starters as well as their wiring may become excessively hot in the event that it takes longer than expected to start the engine, while air-starters can be run for as long as their air supply lasts. Turbine starters provide even more torque and tend to be simpler, and therefore are a natural fit for turbine engines. Turbine air starters are utilized extensively on large turbofan engines commercial and military aircraft; as well as marine ships and vessels, trains, heavy construction equipment, and more.

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