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Red Festo pressure regulator in boxed packaging

Festo

Festo MS4-LR-1/4-D7-AS 529419 Pressure Regulator

SKU CH-18H2-NWCWK MPN MS4-LR-1/4-D7-AS

A pressure regulator for pneumatic systems, supplied new in a single pack

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Precise air pressure control with Festo MS4-LR-1/4-D7-AS regulator
  • Durable construction ensures reliable pneumatic system performance
  • Compact design allows easy integration into existing setups
  • New condition guarantees factory-fresh operation and longevity
  • Red finish provides clear visual identification in workshop environments

Pressure Regulator for Pneumatic Systems

The Festo MS4-LR-1/4-D7-AS is a pressure regulator designed to maintain consistent downstream air pressure in pneumatic circuits. It suits maintenance technicians and automation engineers who require reliable pressure control for actuators and tools. Supplied as a single unit in a box, it carries manufacturer coverage of three years for parts and one year for labour.

Replaces Worn or Out-of-Spec Regulators

Install this unit when an existing regulator fails to hold set pressure, shows internal leakage, or delivers erratic output that affects machine repeatability. The upgrade is worth it when production downtime or quality rejects trace back to unstable air supply. It restores precise adjustment without requiring a complete manifold overhaul.

Verify Port Size and Mounting Compatibility

Confirm your current installation uses a G 1/4 port thread and that the MS4 series body dimensions match the available DIN rail or panel cut-out. Check that the required pressure range and flow capacity align with the D7 adjustment spring specification. Ensure the red colour coding matches your site identification standards before ordering.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $76.99
Cheaper than about 64% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameFESTO
Model nameMS4-LR-1/4-D7-AS
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What thread size does the MS4-LR-1/4-D7-AS need for mounting?

The G 1/4 port threads directly into a matching G 1/4 port on your air line or manifold.

Which step is most often missed when installing the 529419 regulator?

Forgetting to flush the piping before connection lets debris reach the valve seat and causes erratic pressure control.

What part of the MS4-LR-1/4-D7-AS will need replacement first?

The internal diaphragm and seals wear over time; Festo stocks a dedicated seal kit for this series.

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