1/4" Air Oil Water Separator Filter AI-303

air line water separator Oil Water Separator Filter: AI-303 Air oil water Separator with Drain Valve air filter with drain valve 1/4 air filter for spray paint gun Air filter for spray paint guns 1/4 air filter Inline Water and Moisture Separator with Drain Valve
air line water separator Oil Water Separator Filter: AI-303 Air oil water Separator with Drain Valve air filter with drain valve 1/4 air filter for spray paint gun Air filter for spray paint guns 1/4 air filter Inline Water and Moisture Separator with Drain Valve

This 1/4-inch inline separator is designed for high-efficiency filtration, instantly removing moisture and oil from the air in an airline. It is made from durable aluminum and brass and ensures smooth operation and extended tool life.

 


Industrial Filtration Standard🏆

LE-AI303 Professional Metal Case Air Filter
Point-of-Use Integrity. Zero Compromise.

A precision-engineered aluminum and brass solution designed to stop water, oil, and particulates before they contaminate your expensive finishes and air tools.

150 PSI Max Industrial Rating
AL-BODY Solvent-Proof Chassis
1/4" NPT Universal Tool Fit
PUSH-DRAIN Rapid Manual Purge

Strategic Supply Chain Synergy

📈 Low MOQ & Agile Sourcing Pilot your market with lower risk. We support small-batch initial orders for the AI-303 series, allowing distributors to validate local demand without heavy capital commitment.
📦 OEM / Private Label Mastery Your brand, our precision engineering. We provide comprehensive private label services, including laser-etched branding and bespoke retail packaging for global tool catalogs.
🎬 Ready-to-Market Media Kit Accelerate your sales cycle. LEMATEC partners receive instant access to studio-grade imagery and technical demonstration videos to power your storefronts immediately.
🧪 Rapid Technical Sampling Verify industrial integrity before scaling. We offer rapid air-freight technical samples and comprehensive performance audit sheets for your engineering review.Why Strategic Operations Choose the AI-303 Series

In high-stakes automotive refinishing and industrial plasma cutting, "clean air" is not a luxury—it is a baseline. Standard polycarbonate (plastic) filters often crack under high-PSI cycles or cloud over when exposed to industrial solvents. The **LEMATEC AI-303** utilizes a high-grade aluminum housing and brass fittings to provide a lifetime of reliable service in the world's most aggressive workshop environments.

LEMATEC AI-303 Professional Metal Case Air Filter Primary View
Rugged Metal Construction Engineered for Industrial MRO Applications
🛡️ Solvent-Proof Material Logic The aluminum body and high-impact sight window are immune to the corrosive effects of paint thinners and chemical solvents, a critical failure point in cheaper plastic alternatives.
💧 Precision High-Velocity Separation Equipped with advanced internal baffles that force air through a circular path, centrifugally separating moisture and oil droplets without restricting airflow to the tool.
⚙️ Push-Button Manual Purge A spring-loaded manual drain valve allows technicians to evacuate contaminants instantly with one thumb-press, ensuring the filter never reaches capacity during long shifts.
📈 Tool Asset Protection By removing 99.9% of moisture at the point of use, the AI-303 prevents internal rust in impact wrenches and grinders, directly extending the ROI of your pneumatic fleet.
Technical Features of the AI-303 Air Filter
Point-of-Use Protection: Separating Water, Oil, and Particulates Instantly

Mission-Critical Deployment

  • ✅ Automotive Refinishing: Eliminates water spots and "fish-eyes" in top coats and clear coats.
  • ✅ Plasma Cutting: Protects torches and extends consumable life by delivering bone-dry air.
  • ✅ Heavy-Duty MRO: Safeguards industrial sanders and impact tools from corrosive moisture.
AI-303 Attached to Professional Spray Gun
Optimized Balance for Handheld Operation

Technical Procurement Summary

Model IdentifierLE-AI303 Series
Housing MaterialIndustrial Aluminum
Fitting MaterialHigh-Strength Brass
Max Inlet Pressure150 PSI (10.3 Bar)
Optimal Flow Pressure90 PSI
Air Inlet / Outlet1/4" NPT Male/Female
Drain MechanismPush-Button Manual Valve
ManufacturingTaiwan Engineered & QC
Vic Chen - General Manager of LEMATEC

Direct Strategic Inquiry

I am Vic Chen, General Manager at LEMATEC. We lead the path in industrial air management. We specialize in helping global hardware brands increase their category authority through premium-engineered solutions. Ready to differentiate your portfolio with the LE-AI303?

Request Bulk Pricing & Samples ➔

© 2026 LEMATEC. All Rights Reserved. Precision Air Tool Innovation from Taiwan to the World.


AI-303 Metal Filter Body
AI-303 Drain Valve Detail

Technical Data Sheet 

Model NumberAI-303
Housing MaterialIndustrial Aluminum (Impact Resistant)
Inlet / Outlet MaterialHeavy Duty Brass
Port Size1/4" NPT (Universal Fit)
Drain TypePush-Button Release Valve
Operating Pressure90 PSI (Optimal) / 150 PSI (Max)
Product GradeProfessional Grade / Heavy Duty
Country of OriginTaiwan Made in Taiwan

⚙️ Heavy-Duty Construction

Constructed with a solid Aluminum case and Brass fittings. Unlike plastic filters, this unit is designed to withstand drops, solvents, and tough workshop environments.

💧 How to Use the Drain Valve

Simply press the release valve button at the bottom of the unit to instantly eject all trapped water, oil, and dirt particles from the system.


  • Metal Case 1/4" Air Oil Water Separator Filter with Drain Valve
  • Packaging list: Blister Card/Box
  • Carton:10 sets/inner box. 10 inners box/ctn
  • weight:16.5/18.5kgs/2.0'
  • Delivery Time:20~45 Days After Order Confirmed
  • Size:0.166kgs
  • Inner box:29.0 * 15.0 * 10.5 cmd
  • Ctn:61.0 * 30.5 * 46.0 cmd

How do you remove moisture from the pneumatic system with the Lematec air water separator filter for air tools/spray guns?

Related products