Manufacturer of Thermal Oil Pump

A thermal oil pump is a centrifugal pump specifically designed to circulate heat transfer fluid (thermal oil) in industrial heating systems. It operates at temperatures up to 350°C with materials, seals, and bearings engineered to withstand thermal expansion and the variable viscosity of hot fluid.

The FBOT series from FB Bombas operates with thermal fluid at temperatures up to 350°C. Its construction with special mechanical seals and a bearing cooling system ensures long service life even under continuous 24/7 operation at high temperatures.

Heating systems in the chemical, petrochemical, food and beverage, textile, pulp and paper, plastics, and rubber industries. Any process that uses a thermal fluid boiler or indirect heater for precise temperature control without pressurization, as in steam systems.

A thermal oil pump features: high-temperature resistant materials (carbon steel or stainless steel), mechanical seals with quench and cooling systems, bearings designed for thermal expansion, and a design that accommodates fluid dilation. A standard centrifugal pump cannot withstand these conditions.

Yes, the FBOT is designed for closed-loop industrial heating circuits. The thermal fluid circulates between the boiler (or heater) and the heat consumers, returning to the system without losses. The pump operates with positive suction pressure in this type of installation.

The FBOT series handles flow rates up to 2,200 m³/h with manometric head up to 135 m. Available in multiple models to serve everything from small heating systems to large industrial plants. Registered with CRCC Petrobras.

In many cases, yes. The FBOT, designed for operation up to 350°C, is a candidate to replace thermal oil pumps from manufacturers such as KSB, Schneider, Dancor, Ebara, Sulzer, OMEL, Thebe, Wilo and Famac. Equivalence is confirmed model by model: dimensions, flanges, baseplate, Q×H duty point, NPSHr, temperature and sealing. Brazilian manufacturer since 1944, CRCC Petrobras, API 610.

The FBOT uses redundant dual sealing: the 1st seal is a 5.5 mm graphite fiber gland in contact with the thermal oil; the 2nd seal is a single mechanical seal Ø32/Ø42 immersed in oil within the bearing housing — this sealing oil ensures thermal stability and acts as a barrier against leaks. The set supports continuous operation up to 350°C with inspection every 4,000 hours.

The .1 variant has a pressurized cover designed for systems with higher suction pressure and reinforced secondary containment — used in thermal oil circuits with N₂ pressurization. The standard variant serves systems with atmospheric or slightly positive pressure. FB Bombas engineering validates the case based on the operating point and the circuit thermal expansion.

Yes. The FBOT is built in back-pull-out construction with a coupling flange that accepts both an electric motor (direct coupling via spacer) and a steam turbine (with a governor system). The shaft is chrome-plated carbon steel sized to handle the thrust reversal characteristic of turbine starts. FB Bombas engineering specifies the complete pump set.

For thermal oil at 300°C, use a centrifugal pump purpose-built for hot oil, with an oil-immersed mechanical seal and cooling chamber — conventional seals fail from thermal expansion in this range. FB Bombas' FBOT Series operates up to 350°C, covering 300°C duty with design margin: 35 models, flow up to 2,200 m³/h, no external sealing water. The FBOT technical manual (MTEC-16/00) specifies the solution: "bearing-housing sealing with a dual safety system, using a mechanical seal immersed in oil plus graphite packing" (translated from the Portuguese original) — with hydrostatic testing at 1.5× operating pressure.