406929
406929
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406929
406929

Sullair Differential Pressure Regulator Valve Replacement - 406929

Sullair ReplacementSKU: 406929
Price:
$302.00
Stock:
In Stock

Description

Sullair Differential Pressure Regulator Valve Replacement - 406929

Support stable compressor pressure control and dependable system performance with the Sullair Differential Pressure Regulator Valve Replacement - 406929, a differential pressure regulating valve designed for compatible Sullair compressor applications. This replacement valve helps regulate pressure response within the compressor control system so the unit can operate consistently as air demand changes. Replacing a worn, leaking, sticking, or inconsistent regulator valve can help restore pressure stability, improve control response, reduce operating issues, and support reliable daily compressor performance.

  • Supports Pressure Regulation: Helps control pressure response in compatible Sullair compressor systems for steadier operation.
  • Helps Maintain Compressor Control: A properly functioning regulator valve supports reliable pressure feedback and system response during changing demand.
  • 1/4 Inch NPT Valve Design: Identified as Sullair part number 406929 and listed as a differential pressure regulating valve with a 1/4 inch NPT connection.
  • OEM Compatible Replacement: Built as a replacement for Sullair part number 406929 to support routine pressure regulator valve maintenance and dependable compressor operation.

Keep compressor pressure control responsive and help reduce regulation related downtime with the Sullair Differential Pressure Regulator Valve Replacement - 406929, a practical replacement part for supporting long term Sullair 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 Sullair Replacement Parts:

In addition to the Sullair Differential Pressure Regulator Valve Replacement - 406929, 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.

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

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Frequently Asked Questions

Is the 406929 differential pressure valve regulator compatible with my Sullair compressor?

The 406929 is a Sullair differential pressure regulating valve for compatible industrial air compressor applications. Parts references identify 406929 as a differential pressure regulator valve with 1/4 inch NPT connection. Compatibility should always be confirmed by matching 406929 in your compressor manual and verifying the model, serial number, valve location, port size, pressure setting, connection type, and control-line routing before ordering. Not sure? Reach out with your compressor model and serial number and we’ll help confirm compatibility. 

What does the 406929 differential pressure valve regulator do?

The 406929 helps regulate pressure differential within the compressor control system. Depending on the compressor configuration, it can help:

  • Maintain the correct pressure differential
  • Support proper control-air operation
  • Help stabilize compressor regulation
  • Support reliable load and unload response
  • Help maintain proper compressor operating behavior

Why is replacing the 406929 important?

A properly functioning 406929 helps maintain:

  • Stable pressure regulation
  • Reliable compressor control response
  • Proper differential-pressure operation
  • Reduced risk of control-system instability
  • More consistent compressor performance

A worn, leaking, stuck, misadjusted, or contaminated valve can affect compressor regulation and may cause unstable pressure control or operating issues.

What are the signs that the 406929 differential pressure valve regulator may need replacement?

Common signs can include:

  • Unstable compressor pressure regulation
  • Load or unload issues
  • Air leaks at the regulator body or fittings
  • Control pressure not holding correctly
  • Compressor pressure fluctuating more than normal
  • Regulator adjustment not responding properly
  • Contamination or moisture found in control lines
  • Repeated control-system issues after other causes have been checked

These symptoms can also be caused by inlet valve issues, control-line leaks, pressure sensors, solenoids, minimum pressure valve problems, or incorrect adjustment. Inspect the full control system before replacing only the 406929.

Is this an OEM part?

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

How difficult is it to install?

Installing the 406929 is generally a moderate maintenance task because it connects to the compressor’s pressure-control system.

Before service, the compressor should be:

  • Fully shut down
  • Electrically locked out if required
  • Completely depressurized
  • Cooled to a safe working temperature
  • Verified so no stored pressure remains in control lines or connected piping
  • Documented so all tubing and fittings can be reinstalled correctly

Installation typically involves identifying the existing regulator location, marking control-line connections, removing the old valve, installing the replacement 406929, checking for leaks, and verifying proper pressure regulation after startup.

Do you carry other parts for Sullair?

Absolutely. We stock a range of air filters, oil filters, 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.