Spirax-Sarco 50931 Trap

The Spirax-Sarco 50931 is a robust FT-75 Float & Thermostatic Steam Trap engineered for demanding industrial steam systems requiring reliable, continuous condensate removal. Featuring a 1" FNPT connection and a durable cast iron body (ASTM A126 Class B), this parallel-pattern trap is rated for a maximum operating pressure (PMO) of 75 psig. It utilizes a precision-engineered modulating float valve mechanism that adjusts discharge based on the condensate load, ensuring efficient operation at steam temperature. To prevent air binding and ensure rapid start-ups, the unit incorporates an internal balanced pressure thermostatic air vent constructed from high-grade stainless steel, designed to handle non-condensable gases even in the presence of water hammer. With a maximum operating temperature of 450°F and a robust flow capacity, the Spirax-Sarco FT-75 is the industry standard for heat exchangers, unit heaters, and steam main drip stations where varying loads and modulating pressures are present.

• Continuous Condensate Discharge: The modulating float mechanism ensures immediate removal of condensate as it forms, maintaining high system efficiency.
• Corrosion-Resistant Internals: All stainless steel internal components provide superior resistance to corrosive condensate and extended service life in harsh environments.
• In-Line Maintenance: The cast iron cover and internal assembly are completely serviceable without disturbing existing 1-inch NPT piping connections.
• Robust Air Venting: Integrated balanced pressure air vent eliminates air and non-condensable gases, preventing air binding and ensuring efficient heat transfer.
• High Temperature Performance: Maintains structural integrity and precise sealing at temperatures up to 450 degrees Fahrenheit.

What is the maximum pressure rating for the Spirax-Sarco 50931?
This specific FT-75 trap is rated for a maximum operating pressure of 75 psi. For systems exceeding 75 psig, a higher-rated FT series trap or a 125# model should be selected to ensure safety and performance.

Can the FT-75 be serviced without removing it from the steam line?
Yes, the parallel piping configuration and cast iron cover design allow a technician to access and replace the float mechanism or air vent assembly while the body remains in the line.

Is this trap suitable for modulating temperature control valves?
Absolutely. The Float and Thermostatic design is specifically recommended for applications with modulating pressures because it handles widely varying condensate loads and vents air at very low pressures during startup.

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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.