HTO™ 180 | Hot Oil Pump | Tempuflo Series

The HTO™ 180 combines a patented, ambient‑air seal‑protection architecture with a robust, ductile‑iron pressure boundary to sustain performance at process temperatures up to 650°F (343°C). By directing cooler ambient air to the seal area, the pump reduces seal operating temperatures relative to bulk fluid temperature – helping extend mechanical seal life and reduce maintenance frequency. This design is particularly advantageous in continuous high‑heat cycles where conventional pumps suffer accelerated seal wear. 

Hydraulically, the HTO™ 180 is a 3" x 1‑1/2" end‑suction unit rated for flows up to 320 GPM (72.7 m³/h) and differential heads up to 160 ft (49 m), making it suitable for medium‑to‑high circulation loads with moderate head requirements typical of thermal‑oil systems. An enclosed 6.45" (163.8 mm) steel impeller provides efficient energy transfer and stable performance across the operating envelope. 

For mechanical integrity and long service life, the wetted components are cast from ductile iron, while a 303 stainless‑steel drive sleeve protects the shaft from corrosion and wear under hot‑oil conditions. The standard mechanical seal configuration is carbon vs. silicon carbide with Viton® elastomers, with an optional severe‑duty seal available for particularly abrasive or harsh thermal‑fluid chemistries. 

Integration is flexible: the HTO™ 180 can be supplied close‑coupled (184TC or 215TC frame), as a pedestal pump for belt or spacer‑coupling arrangements, or as a PumPAK® (less motor) for OEM builds. Horizontal and vertical mounting options simplify retrofits and new installations alike. The pump is typically driven by motors up to 10 HP (7.35 kW), aligning well with the hydraulic demands of centralized and distributed heat‑transfer circuits.