What makes thermal oil difficult to pump
It must be heated before start-up and kept at temperature through the whole pumping chamber, seal area included.
How we build the pump for thermal oil
| Recommended series | ZV · NAV · CR |
|---|---|
| Flow range of these series | 0.47 – 4,292 l/min (0.03 – 258 m³/h) |
| Body material | Cast iron as standard; stainless steel NAV for aggressive variants |
| Heating | Required — CR jacket on thermal oil, steam or superheated water; hot-spot kit without boiler; or electric cartridges in the body |
| Speed | Standard motor speeds; inverter for flow adjustment |
| Shaft seals | Selected for the working temperature, in the heated zone |
| Connections | NAV: flanged DN 40 – DN 125 PN 16; ZV: threaded ports, close-coupled to the motor |
Where thermal oil pumps work
Applications: Thermal oil heaters and boilers, jacket circuits of heated pumps, hot-spot heating kits, tank heating coils.
Typical markets: Saudi Arabia, Egypt, Nigeria, India, Pakistan, Indonesia, Vietnam, Turkey. For these sites we size for local conditions: the coldest night temperature, 50 or 60 Hz power, heating available on site and spare parts that can be kept in stock locally.
Recommended pump series
Data we need to size your thermal oil pump
- Product name, producer or data sheet of the thermal oil
- Viscosity at the pumping temperature, and the lowest temperature on site
- Flow rate required (l/min, m³/h or bbl/h)
- Discharge pressure, or line length, diameter and height
- Suction: tank, line length and diameter, liquid level
- Heating available on site: steam, thermal oil, hot water or electricity only
- Power supply: voltage and 50 or 60 Hz
Frequently asked questions
Which gear pump do you recommend for thermal oil?
We normally propose the ZV, NAV or CR Series. The ZV is compact, for small flows and dosing, close-coupled to the motor. The final model depends on flow, viscosity at temperature and suction, and is confirmed by our technical office.
Does a pump for thermal oil need heating?
Yes. Without heat the product sets in the chamber and the pump cannot start. We use the CR jacket on the plant heating circuit, the hot-spot kit where there is no boiler, or electric cartridges in the body.
Do you supply pumps outside Italy?
Yes. The pumps are built in our Bologna workshop and quoted for export. Write your country in the form and we will size the pump for your power supply (50 or 60 Hz) and site conditions.
This page also covers: Heat transfer oil, Diathermic oil.