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- Ingersoll Rand
- 47642703001 99289894
- Minimum Pressure Check Valve Repair Kit
- USA
- 84 × 84 × 202 mm
- 1.41 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Ingersoll Rand 47642703001 99289894 Minimum Pressure Check Valve Repair Kit is a service kit for maintaining the minimum pressure and check valve assembly in compatible Ingersoll Rand rotary screw compressors. The valve assembly helps maintain the required pressure inside the separator system while also controlling the direction of compressed-air flow.
During compressor operation, the minimum pressure function helps establish sufficient internal pressure for proper oil separation and lubrication. The check-valve function prevents downstream pressure from flowing back toward the compressor package when the compressor unloads or stops.
This repair kit is intended for maintenance of the valve assembly rather than replacement of the complete compressor control system. When servicing the valve, the condition of the valve body, sealing surfaces, spring mechanism, and related pneumatic passages should be checked together.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Ingersoll Rand |
| Part Number | 47642703001 |
| Component Number | 99289894 |
| Product Type | Minimum Pressure Check Valve Repair Kit |
| Application | Rotary Screw Compressor |
| System Function | Minimum Pressure Control and Airflow Check |
| Component Category | Compressor Service Part |
| Service Function | Valve Assembly Repair |
| Dimensions | 84 × 84 × 202 mm |
| Weight | 1.41 kg |
Product Features
- Service kit for the minimum pressure check valve assembly.
- Combines minimum-pressure control and non-return airflow functions within the compressor system.
- Supports maintenance of the compressor separator and discharge-air circuit.
- Helps restore proper valve operation when internal valve components become worn or contaminated.
- Suitable for compressor overhaul and scheduled maintenance work.
- Identified by Ingersoll Rand part numbers 47642703001 and 99289894.
- Intended for compatible Ingersoll Rand rotary screw compressor applications.
Working Principle
The minimum pressure check valve is located in the compressed-air discharge path of an oil-injected screw compressor. During startup, the valve remains sufficiently closed to allow the compressor package to build the internal pressure required for proper lubrication and oil separation.
Once the required internal pressure is reached, the valve opens and allows compressed air to flow toward the downstream air system.
A simplified flow path is:
Airend → Separator System → Minimum Pressure Check Valve → Aftercooler / Air Outlet → Plant Air System
When compressor pressure falls during unloading or shutdown, the check-valve function restricts reverse airflow from the downstream system. This helps prevent unwanted pressure migration back into the compressor package.
During repair, worn seals, damaged valve components, weakened springs, contamination, or restricted passages can affect the valve’s opening and closing behavior. Replacing the applicable service components helps restore the mechanical operation of the valve assembly.
Role in a Rotary Screw Compressor Control Architecture
| System Element | Function |
|---|---|
| Airend | Compresses air and introduces lubricating oil into the compression process |
| Air/Oil Separator | Removes oil from the compressed-air stream |
| Minimum Pressure Check Valve | Maintains required internal pressure and prevents reverse airflow |
| Aftercooler | Reduces compressed-air temperature |
| Air Receiver / Plant Header | Receives and distributes compressed air |
| Compressor Controller | Manages loading, unloading, and operating conditions |
| Oil Circuit | Supplies and recirculates compressor lubrication oil |
The minimum pressure check valve is a mechanical component, but its operating condition directly affects compressor behavior. If the valve does not maintain the required internal pressure or fails to close correctly, startup performance, oil separation, and shutdown behavior can be affected.
Industrial Applications
| Application | Typical Use |
|---|---|
| Manufacturing Plants | Compressor maintenance for production air systems |
| Automotive Production | Pneumatic production equipment and assembly tools |
| Chemical Plants | Industrial compressed-air systems |
| Food and Beverage Plants | Preventive maintenance of rotary screw compressors |
| Pharmaceutical Facilities | Compressor service and air-system maintenance |
| Industrial Utilities | Maintenance of continuous compressed-air generation |
| Compressor Overhaul | Repair of minimum pressure and check valve assemblies |
Installation and Maintenance
- Verify the complete 47642703001 / 99289894 part-number identification against the compressor model before starting the repair.
- Shut down the compressor and isolate it from the plant compressed-air system.
- Fully release internal pressure before opening or servicing the valve assembly.
- Allow the compressor and valve components to cool before beginning maintenance.
- Record the original valve assembly arrangement before disassembly.
- Inspect the valve body, sealing surfaces, and internal passages for contamination or mechanical damage.
- Check the spring and moving valve components for wear, deformation, or loss of tension.
- Clean reusable valve components according to the applicable compressor maintenance procedure.
- Install the repair-kit components in the correct orientation and sequence.
- Inspect and replace damaged sealing elements rather than reusing visibly worn components.
- Reassemble the valve and verify that the moving parts operate freely without binding.
- After startup, monitor compressor pressure buildup, discharge behavior, leaks, and shutdown response.
Related Components
| Component | Relationship |
|---|---|
| Ingersoll Rand Air/Oil Separator | Works upstream of the minimum pressure valve to separate oil from compressed air |
| Minimum Pressure Valve Assembly | Main valve assembly serviced by the repair kit |
| Check Valve Components | Control reverse airflow during unloading and shutdown |
| Separator Vessel | Houses the air/oil separation system |
| Oil Return Circuit | Returns separated oil to the compressor |
| Compressor Air Filter | Filters incoming air before compression |
| Compressor Oil Filter | Filters circulating compressor lubricant |
| Compressor Controller | Controls compressor loading, unloading, and operating sequence |
Recommended Related Models
| Model | Product Type / Application |
|---|---|
| Ingersoll Rand 47642703001 99289894 | Minimum Pressure Check Valve Repair Kit |
| Ingersoll Rand 47642703001 54509427 | Air/Oil Separator |
| Ingersoll Rand 47642701001 | Air/Oil Separator |
| Ingersoll Rand 47642702001 | Compressor Repair / Valve Kit |
| Ingersoll Rand 47642700001 | Air Filter |
| Ingersoll Rand Rotary Screw Compressor Service Components | Compressor maintenance and overhaul parts |
Key Advantages
- Supports repair of the minimum pressure check valve assembly.
- Helps maintain the required internal compressor pressure.
- Supports correct compressed-air flow during normal operation.
- Helps prevent reverse airflow during unloading and shutdown.
- Suitable for scheduled maintenance and compressor overhaul.
- Provides a service-oriented alternative to replacing the complete valve assembly when compatible.
Technical FAQs
What does the minimum pressure function do in a rotary screw compressor?
It helps the compressor establish sufficient internal pressure during operation. This pressure supports proper oil separation and lubrication before compressed air is delivered to the downstream system.
How does the check-valve function affect compressor shutdown?
The check-valve function restricts compressed air from flowing backward from the downstream system into the compressor after unloading or shutdown. A valve that does not close correctly can cause abnormal pressure behavior during shutdown or restart.
What components should be inspected when using this repair kit?
The valve body, sealing surfaces, spring, moving valve components, and internal air passages should be inspected. The connected separator and downstream piping should also be checked if abnormal pressure or airflow behavior was observed before maintenance.
Can this repair kit be used on any Ingersoll Rand compressor?
No. The repair kit should be matched to the specific compressor model and installed valve configuration. The 47642703001 / 99289894 identification should be verified against the compressor parts documentation before installation.