Hankison 1701-2 Bypass Valve

The Hankison 1701-2 Bypass Valve is a specialized bleed type air dryer valve designed to streamline compressed air system maintenance without requiring a full system shutdown. This model, often cross-referenced as 21-750 or K-1701-2, integrates the functionality of a traditional three-valve bypass into a single, high-efficiency unit. Engineered for refrigerated air dryers and filtration banks, the 1701-2 automatically depressurizes the bypassed component through a dedicated bleed hole. This feature eliminates the hazard of trapped pressure during element changes or dryer servicing, ensuring a safer workflow for technicians.

Constructed from professional-grade brass with Buna-N seals and nylon components, the Hankison 1701-2 is rated for a maximum operating pressure of 200 PSIG and temperatures up to 120?F. The unit features 3/8-inch tube compression fittings on the dryer side and 3/8-inch NPT connections on the service side. The rotatable fitting design simplifies installation in tight equipment cabinets, significantly reducing potential leak points compared to field-brazed bypass manifolds. For contractors managing HPR Series dryers, this genuine OEM part ensures flow continuity up to 35 SCFM while maintaining strict system pressure integrity.

• Internal Automatic Bleed: Automatically depressurizes the dryer or filter during bypass mode to facilitate safe component replacement.
• Compact Integrated Design: Replaces bulky 3-valve bypass assemblies, reducing footprint and installation labor costs.
• Rotatable Fittings: Metal-to-plastic union design allows for 360-degree rotation of fittings to simplify tube alignment.
• Broad Compatibility: Highly versatile for use with air, inert gases, and liquids compatible with brass and nylon internals.

What is the difference between the 1701-1 and 1701-2 models?
The 1701-1 is a non-bleed type, meaning the bypassed component remains under full system pressure. The 1701-2 is a bleed type that automatically vents downstream pressure when the valve is toggled.

Can this valve be used on non-Hankison equipment?
Yes, as long as the flow rates do not exceed 35 SCFM and the media is compatible with the brass, Buna-N, and nylon materials of construction.

Does this unit include the 3/8" compression nuts and ferrules?
Yes, it typically ships with the necessary compression hardware for immediate integration into 3/8" OD tubing systems.

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.