Spirax-Sarco 69844 Air Eliminator

Install the Spirax-Sarco 69844 13WS 1" NPT Air Eliminator to solve persistent air binding issues in your pressurized liquid systems. Engineered for high-demand contractor applications, this industrial air eliminator features a heavy-duty cast iron body and stainless steel internals designed to withstand a maximum operating pressure (PMO) of 150 psig. The integrated EPDM valve head provides a consistent, tight shut-off, preventing fluid loss while automatically venting non-condensable gases that compromise pump suction and heat transfer efficiency.

Whether you are managing cold water lines, suction lines to pumps, or cooling water for air compressors, the Spirax Sarco 13WS ensures optimal circulation by removing air pockets at system high points. This 1 inch NPT air vent transition from a 1" inlet to a 3/8" NPT outlet, making it a standard fit for most commercial hydronic and process water setups. Its float-type design allows for immediate response to gas accumulation, protecting your equipment from cavitation and corrosion without the need for manual intervention.

• Optimized Performance: Effectively removes air to eliminate noise/vibration and improve thermal efficiency in liquid systems.
• Durable Construction: Built with a rugged ASTM A126 Class B cast iron body and corrosion-resistant stainless steel float and bracket.
• Tight Shut-off: Features a resilient EPDM valve head to prevent liquid bypass during high-pressure operation up to 150 psi.
• Field Serviceable: The bolt-on cover allows for internal inspection and maintenance without breaking the main inlet piping connections.
• High Temperature Range: Rated for temperatures up to 338°F at maximum pressure, suitable for both hot and cold liquid services.

Common Questions

Where should the 13WS Air Eliminator be installed for maximum effectiveness?
For proper air elimination in piping, always install the unit vertically at the highest points of the system or terminal equipment where air naturally collects. Ensure the inlet is at the bottom and install a full-port isolation valve to facilitate future servicing.

Is the Spirax Sarco 69844 suitable for steam service?
The 13WS series is specifically designed for liquid systems such as water or condensate return lines. For steam system air venting, a thermostatic air vent should be used instead of a float-type liquid air eliminator.

Can this unit handle contaminated or dirty fluids?
While the stainless steel internals are robust, debris can prevent the EPDM head from seating. It is recommended to install a strainer upstream or perform periodic inspections of the valve mechanism to ensure debris has not fouled the seat.

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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.