YunAir HAD20B 1/2" Aluminum Round Float  Condensate Automatic Drain Valve, 400 L/h Massive Discharge | Zero Electricity | Available in 3 Colors | Premium Die-Casting Quality

All condensate produced during air compression and drying is a highly contaminated mixture containing water, aggressive air compressor oil, carbon sludge, dirt, and pipe rust. Ignoring this moisture backup directly degrades system performance, ruins pneumatic tools, fouls high-precision filters, and causes downstream pipe corrosion. Proper and reliable drainage is critical for both system efficiency and environmental compliance.

When selecting an automatic drain for your compressed air system, initial cost is only the tip of the iceberg. To avoid frequent system downtime and air leakage, wise buyers prioritize product reliability, heavy-duty build quality, and dependable manufacturer service.

While many similar float drains flood the market, YunAir HAD20B sets the industrial benchmark by engineering out the common failure points of cheaper alternatives.

The YunAir Difference: Why HAD20B?

✔ Advanced Die-Casting Technology
Unlike standard brittle housings, the HAD20B shell is manufactured using state-of-the-art precision aluminum die-casting technology, ensuring a flawless, pore-free grain structure for extreme pressure resistance.

✔ Extra-Thick Drain Housing
We intentionally increased the thickness of the aluminum drain housing. This robust, heavy-duty walls prevent cracking under pressure spikes, heavy vibration, or accidental industrial impacts.

✔ Premium-Grade Float Ball Material
The internal round float ball is constructed from high-grade, corrosion-resistant materials that won't degrade, warp, or lose buoyancy when constantly exposed to synthetic compressor lubricants and aggressive oil-water emulsions.

✔ Innovative Anti-Air Locker System (Pressure & Buoyancy Balance)

Say goodbye to valve failure caused by air binding. Ordinary float drains frequently suffer from "air locks," where internal pressure imbalances trap the float ball at the bottom, leading to catastrophic water backup. Every YunAir HAD20B is equipped with an integrated Anti-Air Locker. This advanced mechanism instantly equalizes internal air pressure and buoyancy, ensuring the float ball responds fluidly and precisely to the actual condensate level. No air binding, no bypass, and 100% reliable drainage under variable flow.

✔ Stainless Steel Manual Drain Valve
Unlike competitors, every YunAir HAD20B comes standard with a Stainless Steel Manual Drain Valve. This premium feature allows maintenance teams to safely perform manual system flushes and zero-pressure depressurization without worrying about cracks or thread stripping.

✔ Industrial-Grade O-Ring Seals
Equipped with premium custom O-rings that offer superior thermal stability and chemical resistance, guaranteeing zero air loss and zero fluid leakage over years of continuous operation.

✔ 100% Factory Testing Device Inspected
Every single HAD20B unit undergoes rigorous quality screening on our advanced in-house hydrostatic and pneumatic testing devices before packaging. No shortcuts, no defects.

Technical Specifications

•  Brand: YunAir

•  Model: HAD20B

•  Drain Mechanism: Internal Float / Mechanical 

•  Inlet/Outlet Size: Rc1/2”, φ 6 mm

•  Max. Discharge Rate: 400 Liters / Hour 

•  Housing Material: Premium Precision Die-Cast Aluminum

•  Power Supply: None (100% Pneumatic / Mechanical)

•  Primary Media: Condensate, Compressed Air, Oil & Lubricant Mixtures

•  Compatible Equipment: In-line Compressed Air Filters, Centrifugal Water Separators

•  Color Options: 3 colors

Applications:

The versatile 1/2" inlet allows the HAD20B to be easily retrofitted to handle naturally accumulating condensate across different parts of the system:

•  Refrigerated Air Dryers: Reliably handles the massive, continuous water output from the drying stage.

•  Centrifugal Moisture Separators: Flush out bulk liquid water and dense oil droplets at the front end.

•  In-line Mainline Air Filters: Protect delicate coalescing elements from liquid logging.

Don't Let Dirty Condensate Kill Your System Efficiency – Contact YunAir

As a dedicated manufacturer with our own in-house R&D and advanced production lines, YunAir delivers factory-certified reliability. The HAD20B is the ultimate cost-effective, zero-loss defense against aggressive oil-water-rust mixtures.

•  Need a reliable OEM supplier? We support global air treatment brands and distributors with bulk wholesale discounts.

•  Ready to upgrade your system? Get your factory-direct quote and compatibility consultation within 12 hours.

✔ Contact our engineering sales team today: info@yun-air.com

✔ Connect via WhatsApp/WeChat for an instant quote: +86-150-1366-4809

✔ Discover more factory-direct solutions://yun-air.com

Protect your equipment, save air energy, and visually master your condensate management. Reach out to us now for free samples and wholesale pricing!