Hankison 504 Condensate Drain

The Hankison 504 Condensate Drain is a high-performance, pneumatically operated auto drain engineered for the rugged removal of water, oil, and emulsions from compressed air systems. Built as a direct replacement for HKN-0503 and HKN-503, this unit utilizes Snap-Trap technology to ensure positive discharge without the loss of valuable compressed air. Unlike standard float valves, the 504 features a level-actuated pilot valve held by a magnetic action, which prevents "level seeking" and minimizes unnecessary cycling caused by external vibrations. The Viton float mechanism is specifically designed to be impervious to synthetic lubricants, making it ideal for use with modern high-temp compressors and refrigerated air dryers.

This mechanical float drain is housed in a durable zinc body with epoxy-coated internal components to resist corrosion in harsh industrial environments. Technical specifications include a 1/2" NPT inlet and a 5/16" NPT outlet, with an operating range of 20 to 175 psig. The internal stainless steel screen protects the discharge port from pipe scale and contaminants, significantly reducing the risk of clogging and system downtime. With a nominal capacity of 0.3 gallons per hour and a discharge of 20 cc per operation, it is a veteran choice for HVACR contractors looking for zero-loss condensate management in remote or hazardous areas where electrical power is unavailable or unsafe.

• Zero-Loss Operation: The pneumatic pilot-controlled piston ensures the discharge port is held securely shut, preventing air waste during the drainage cycle.
• Enhanced Durability: Features a self-bailing solid surface float and Viton seals for compatibility with the widest range of compressor oils and synthetic lubricants.
• Contaminant Resistance: An integrated stainless steel debris screen and protective baffle safeguard the internal mechanism from rust and pipe scale.
• Direct Compatibility: Drop-in replacement for Hankison HKN-0503 and HKN-503 models, allowing for fast field swaps without piping reconfigurations.
• Hazardous Area Safe: Fully mechanical design requires no electricity, making it suitable for Class 1, Div 1 environments and portable air systems.

Is the Hankison 504 suitable for high-temperature applications?
Yes, it is rated for operating temperatures up to 120°F (49°C). For systems generating significant heat, the Viton float mechanism provides the necessary chemical resistance to prevent seal degradation.

How does this model differ from a standard timed electric drain?
The 504 is a demand-actuated pneumatic drain. It only cycles when condensate levels reach the trigger point, whereas timed drains fire at set intervals regardless of water volume, leading to potential air loss.

What maintenance is required for the Snap-Trap series?
Routine maintenance involves checking the discharge port screen for debris buildup. Because of the magnetic pilot action, the unit is less prone to "chatter" or partial opening, which extends the life of the resilient pilot valve seat.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.