242405
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242405
Sullair Minimum Pressure Check Valve Replacement - 242405

Sullair Minimum Pressure Check Valve Replacement - 242405

Sullair ReplacementSKU: 242405
Price:
$409.50
Stock:
In Stock

Description

Sullair Minimum Pressure Check Valve Replacement - 242405

Maintain proper internal pressure and dependable compressor discharge control with the Sullair Minimum Pressure Check Valve Replacement - 242405, a 2 inch NPT minimum pressure and check valve designed for compatible Sullair rotary screw compressors. This valve helps maintain the minimum pressure needed for proper lubricant circulation and separator performance while also preventing compressed air from flowing backward through the system during load and unload cycles. Replacing a worn, sticking, leaking, or malfunctioning valve can help restore pressure control, reduce backflow, and support reliable compressor operation.

  • Maintains Minimum System Pressure: Helps preserve the internal pressure required for proper lubricant circulation and dependable separator performance.
  • Prevents Reverse Airflow: The integrated check valve function helps stop compressed air from flowing backward through the compressor discharge system.
  • 2 Inch NPT Valve: Identified by Sullair as a 2 inch NPT minimum pressure/check valve for compatible rotary screw compressor applications.
  • OEM Compatible Replacement: Built as a replacement for Sullair part number 242405 to support proper fitment, pressure control, and dependable compressor operation.

Help maintain proper compressor pressure, reliable lubricant circulation, and controlled discharge airflow with the Sullair Minimum Pressure Check Valve Replacement - 242405, a dependable replacement valve for compatible Sullair rotary screw compressors.

Why Choose Us?

  • OEM-Equivalent Quality: Our parts meet or exceed OEM standards - at a fraction of the price. You're not paying extra for a logo.
  • Not Just Another Marketplace: We're not just a place to buy parts or oil. We're compressor experts who can provide personalized guidance and reliable support.
  • All Brands, No Restrictions: Unlike many distributors who are tied to OEM agreements, we sell and service parts for all major compressor brands. Can't find what you need? We'll help you get it.
  • USA-Based Support: Talk to real people in Greenville, SC, who know compressors and are ready to help.

Still curious? Learn more about our Inlet to Outlet™ Promise and see why so many customers trust us as their go-to compressor partner.

Other Sullair Replacement Parts:

In addition to the Sullair Minimum Pressure Check Valve Replacement - 242405, we stock replacement parts for Sullair Air Filters, Sullair Oil Filters, Sullair Separators, Sullair Oil and more so you can maximize the performance of your Sullair Compressors.

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Frequently Asked Questions

Is the 242405 minimum pressure/check valve compatible with my Sullair compressor?

The 242405 is a Sullair minimum pressure/check valve with a 2-inch NPT connection used in compatible Sullair rotary screw compressor discharge systems. Sullair parts can vary by model, horsepower, configuration, and serial number. Always verify 242405 in your compressor parts manual before ordering. Not sure? Reach out with your compressor model and serial number and we’ll help confirm compatibility. 

What does the 242405 minimum pressure/check valve do?

The 242405 performs important functions in the compressor discharge system.

It:

  • Maintains a minimum receiver/sump pressure
  • Helps support proper air/oil separation
  • Maintains the pressure needed for proper lubricant circulation
  • Opens to supply compressed air to the service line after minimum pressure is reached
  • Prevents compressed air from flowing backward from the service line into the receiver

Sullair documentation states that the valve maintains approximately 50 PSIG in the receiver during full-load operation.

Why does the compressor need minimum pressure?

The compressor requires minimum receiver pressure to keep the internal lubrication and separation systems functioning correctly. Without sufficient internal pressure, the compressor may not circulate lubricant or separate oil from compressed air correctly.

What are the signs that the 242405 may need repair or replacement?

Possible symptoms include:

  • Compressor does not maintain proper sump pressure
  • Slow or abnormal pressure buildup
  • Improper lubricant circulation
  • Increased oil carryover
  • Air leaking backward into the compressor during shutdown
  • Service-line pressure bleeding into the receiver
  • Valve sticking open or closed
  • Abnormal pressure during unloaded operation
  • Internal leakage around the piston seal
  • Physical valve-body damage

Other control-system problems can produce similar symptoms, so diagnosis should include system pressure and related discharge components.

Is this an OEM part?

This is an OEM-equivalent replacement minimum pressure check valve designed to meet the same performance standards as the original Sullair valve.  

How difficult is it to install?

Replacing the 242405 is generally a moderate to advanced compressor repair because it is installed directly in the pressurized discharge system.

Before service, the compressor should be:

  • Fully shut down
  • Electrically locked out
  • Completely depressurized
  • Isolated from downstream line pressure
  • Cooled to a safe working temperature
  • Verified so it cannot automatically restart

Sullair specifically warns that all sump pressure and downstream pressure must be relieved before servicing the valve.

After installation, verify:

  • Proper sump-pressure buildup
  • Normal opening to the service line
  • No compressed-air leaks
  • No lubricant leaks
  • Correct unloading behavior
  • No reverse airflow during shutdown

Do you carry other parts for Sullair?

Absolutely. We stock a range of air filters, oil filters, separators, synthetic oils, and many other maintenance parts for Sullair equipment. If you don’t see what you need, just ask and we’ll help you find it.  

How do I know which oil to use in my Sullair compressor?

Stationary rotary screw compressors may have specific oil requirements that differ from reciprocating or portable units. To make sure you’re using the right lubricant for your machine, check out our full guide here: Choosing the Right Oil for your Sullair Compressor. It covers the recommended options for rotary screw compressors and helps you match your compressor with the proper oil.

Where do your products ship from?

All parts ship from our Greenville, South Carolina warehouse. Our USA-based team ensures fast shipping and dependable customer support whenever you need assistance.