HTO™ 80 | Hot Oil Pump | Tempuflo Series

The HTO™ 80 is a high‑temperature centrifugal pump engineered to deliver stable, long‑term performance in demanding thermal‑fluid systems. Its design centers on maintaining hydraulic efficiency and mechanical integrity under continuous exposure to extreme process temperatures, reaching 650°F (343°C). This capability makes the pump suitable for a wide array of industrial heat‑transfer operations, where durability, thermal stability, and consistent flow are essential. 

At the core of the pump’s architecture is a ductile‑iron casing, selected for its ability to withstand mechanical stress, thermal cycling, and the expansion characteristics typical in high‑temperature service environments. Ductile iron provides significantly greater fatigue resistance than standard cast iron, ensuring structural reliability during repetitive heating and cooling cycles found in industrial processes. 

The HTO™ 80 features an enclosed 5.9" (149.86 mm) steel impeller, precision‑machined to optimize hydraulic performance and reduce internal turbulence. Its enclosed design improves volumetric efficiency and reduces leakage losses, supporting the pump's ability to reach flow rates of up to 85 GPM (19.3 m³/h) and heads up to 130 ft (40 m). The impeller’s steel construction enhances rigidity at elevated temperatures, maintaining geometric stability that is crucial for predictable flow and pressure output. 

One of the defining engineering features of the HTO™ 80 is its isolated, air‑cooled seal chamber, which uses passive ambient‑air convection to reduce temperature exposure on the mechanical seal assembly. This structure separates the sealing elements from the hot process fluid, providing a thermal buffer that significantly prolongs seal life and decreases unplanned maintenance events. The seal set–comprising carbon, silicon carbide, and Viton components–is designed to handle both the chemical properties of heat‑transfer oils and the thermal gradients within the pump head. 

The 316 stainless‑steel drive sleeve provides corrosion resistance and dimensional stability in the drive train, protecting the shaft from wear while ensuring smooth power transmission from the motor to the impeller. This material choice supports long‑term operation in environments where thermal fluids may present oxidative or corrosive characteristics. 

To accommodate a variety of installation requirements, the HTO™ 80 is available in multiple drive configurations, including close‑coupled 56C, close‑coupled 145TC, pedestal, and PumPAK® (pump‑only) options. These variants allow OEMs and system integrators to select the optimal configuration for space‑restricted systems, retrofits, or custom‑engineered machinery. Additionally, the pump allows for horizontal or vertical installation, providing flexibility for both new and existing thermal‑fluid circuits. 

Every component of the HTO™ 80 is optimized for reliability in continuous‑duty environments, such as plastics processing, chemical manufacturing, industrial heat‑transfer systems, and other applications requiring stable, high‑temperature fluid movement. The combination of robust materials, thermal‑management engineering, and versatile drive options ensures that the HTO™ 80 performs consistently even under harsh conditions where other pump designs may experience rapid wear or thermal distortion.