RY Series Thermal Oil Pump

The RY series is a horizontal single-stage centrifugal pump built to circulate heat transfer oil through closed heating loops at -20°C to 350°C.

It covers 1–500 m³/h at a working pressure of 1–12.5 bar, and its natural air-cooling fin structure removes the need for an external cooling-water system.

The seal housing combines a packing seal with a heat-resistant auxiliary seal, and an oil guide tube allows the seal condition and recovered heat transfer oil to be observed in service.

The pump is used wherever a liquid-phase thermal oil system must keep heat moving — reactors, presses, dryers, calenders and storage tanks — without the capital and safety cost of high-pressure steam.

• Sealing: a combination of packing seal and mechanical seal with a heat-resistant auxiliary seal gives low-leakage operation at high temperature.
• Cooling: natural air-cooling fins on the bearing and seal housing remove the need for cooling-water piping, a water jacket or water-temperature control.
• Bearings: dual ball bearings, oil lubricated at the front end and grease lubricated at the rear.
• Oil guide tube: fitted in the middle of the bearing bracket so seal condition and recovered heat transfer oil can be observed during operation.
• Body & mounting: single-stage, single-suction cantilevered foot support with axial suction and vertical discharge; the motor is mounted on the same baseplate.
• Drive & coupling: electric motor driven through a flexible coupling; a spacer coupling allows the complete pump bracket to be removed without dismantling the casing or motor, and the coupling is protected by a guard.
• Temperature class: built for continuous liquid-phase HTF service from -20°C to 350°C; the seal arrangement and materials are matched to the maximum fluid temperature.

• Chemical: circulates hot oil through reactors, jacketed vessels and distillation columns where indirect heating is preferred to steam.
• Textile: supplies heat to dyeing, drying and finishing lines, holding the oil loop at temperature across the shift.
• Food processing: feeds heat transfer oil to fryers, ovens and other indirect heating equipment on food lines.
• Petroleum and petrochemical: serves process heating loops, storage-tank heating and oil circulation in refineries.
• Rubber, plastics and woodworking: provides the circulating duty for presses, calenders, moulds and hot plates.
• Pharmaceutical: supplies indirect heat to reactors and drying equipment in pharmaceutical manufacturing.
• Thermal energy and road construction: acts as the circulation pump in HTF heaters, bitumen tanks and asphalt plant heating loops.

• Size the pump from the system heat load and the HTF properties at operating temperature — not from catalogue maximums — so the head covers heater, pipe, valve and process-equipment losses.
• State the maximum working temperature, because it fixes the seal arrangement, gasket and coupling selection for -20°C to 350°C service.
• Confirm the heat transfer oil type and its viscosity at operating temperature; viscosity directly affects the starting and running torque.
• No cooling water is needed, so check that the installation point leaves enough free air movement around the air-cooling fins.
• Give the motor voltage, frequency and duty cycle, and confirm whether the pump is baseplate mounted with the motor on a common base.
• Verify NPSH available at the pump inlet for hot-oil service, especially where the expansion tank is mounted high in the loop.