401820.1
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401820.1
Kaeser Minimum Pressure Check Valve Kit Replacement - 401820.1

Kaeser Minimum Pressure Check Valve Kit Replacement - 401820.1

Kaeser ReplacementSKU: 401820.1
Price:
$480.00
Stock:
In Stock

Description

Kaeser Minimum Pressure Check Valve Kit Replacement - 401820.1

Support stable system pressure and dependable compressor performance with the Kaeser Minimum Pressure Check Valve Kit Replacement - 401820.1, a minimum pressure check valve repair kit designed for compatible Kaeser compressor applications. This replacement kit helps service the minimum pressure valve so the compressor can maintain proper internal pressure and reduce reverse flow through the system. Replacing worn internal valve components during maintenance can help restore pressure stability, improve compressor response, reduce air and oil system issues, and support reliable daily operation.

  • Supports Minimum Pressure Control: Helps maintain proper internal compressor pressure so the system can operate within the intended pressure range.
  • Helps Prevent Backflow: Check valve function helps reduce reverse flow that can affect compressor performance, pressure stability, and system reliability.
  • Minimum Pressure Valve Kit Design: Identified as Kaeser part number 401820.1 and listed as a minimum pressure valve kit or minimum pressure check valve repair kit.
  • OEM Compatible Replacement: Built as a replacement for Kaeser part number 401820.1 to support routine minimum pressure check valve service and dependable compressor operation.

Keep pressure control responsive and help protect your compressor from flow related issues with the Kaeser Minimum Pressure Check Valve Kit Replacement - 401820.1, a practical repair kit for supporting long term Kaeser compressor reliability.

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 Kaeser Products to Check Out:

In addition to the Kaeser Minimum Pressure Check Valve Kit Replacement - 401820.1, we have Kaeser Air Filters, Kaeser Oil Filters, Kaeser Separators, Kaeser Oil and more to help you keep your Kaeser Compressor in top shape.

Note: This item is final sale and not eligible for return.

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Frequently Asked Questions

Is the 401820.1 minimum pressure check valve kit compatible with my Kaeser compressor?

The 401820.1 is a Kaeser minimum pressure valve kit for compatible oil-injected rotary screw compressor applications. Compatibility should always be confirmed by matching 401820.1 in your compressor manual and verifying the model, serial number, minimum pressure valve assembly, valve body, seal arrangement, spring configuration, and pressure setting before ordering. Not sure? Reach out with your compressor model and serial number and we’ll help confirm compatibility. 

What does the 401820.1 minimum pressure check valve kit do?

The 401820.1 services the minimum pressure check valve, which helps maintain required pressure inside the compressor package during operation. Depending on the compressor design, the valve helps:

  • Maintain minimum sump or separator vessel pressure
  • Support proper oil circulation
  • Help control air discharge from the compressor package
  • Reduce reverse airflow after shutdown
  • Support proper air/oil separation performance

Why is replacing the 401820.1 important?

A properly serviced minimum pressure check valve helps maintain:

  • Stable internal compressor pressure
  • Proper oil flow and lubrication
  • Better air/oil separation performance
  • Reduced risk of backflow
  • More reliable rotary screw compressor operation

A worn, leaking, sticking, or contaminated minimum pressure valve can cause startup issues, pressure instability, excessive oil carryover, or poor compressor performance.

What are the signs that the 401820.1 minimum pressure check valve kit is needed?

Common signs can include:

  • Slow or unstable pressure buildup
  • Compressor struggling to maintain internal pressure
  • Oil carryover into the compressed air system
  • Air leaking back after shutdown
  • Difficulty unloading or restarting
  • Abnormal separator vessel pressure
  • Unusual pressure fluctuation
  • Valve sticking, leaking, or showing contamination during inspection

These symptoms can also be caused by separator issues, inlet valve problems, scavenge-line restrictions, pressure-control problems, or incorrect oil level. Inspect the full system before using the 401820.1 kit.

Is this an OEM part?

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

How difficult is it to install?

Installing the 401820.1 is generally a moderate to advanced maintenance task because it involves the compressor’s pressurized air and oil system.

Before service, the compressor should be:

  • Fully shut down
  • Electrically locked out
  • Completely depressurized
  • Cooled to a safe working temperature
  • Positioned to contain any oil released during service
  • Verified so no stored pressure remains in the separator vessel, oil circuit, or connected piping
  • Documented so seals, springs, and valve components are reassembled correctly

Installation typically involves accessing the minimum pressure valve, disassembling the valve, replacing the worn service components from the 401820.1 kit, cleaning the valve body, reassembling components in the correct order, and checking for leaks, pressure stability, and proper operation after startup.

Do you carry other parts for Kaeser?

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

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.