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HTW 300 | Hot Water Pump | Tempuflo Series

HTW180 and 300 - Product ImageHTW - Performance (Seal Cooling)HTW - Performance (P-T Limits)
HTW180 and 300 - Product Image
HTW - Performance (Seal Cooling)
HTW - Performance (P-T Limits)

The MP Pumps HTW 300 is a uniquely engineered, high‑temperature centrifugal pump designed specifically for demanding industrial process applications. Optimized for hot water and various glycol‑based heat‑transfer fluids, it delivers reliable performance, long seal life and exceptional thermal stability – making it the ideal choice for environments with elevated operating temperatures.

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Product Overview

The HTW 300 is part of the Tempuflo® HTW Series, featuring patented pump technology engineered to handle process temperatures up to 400°F (204°C) while maintaining a significantly reduced seal chamber temperature. Its innovative isolated seal chamber is effectively cooled through a dual‑system approach: an integrated cooling loop heat exchanger and a fan clamp assembly that uses the airflow generated by a standard NEMA C‑Face motor. This ensures the seal cavity never exceeds 170°F (77°C), even while handling high‑temperature process media.

The pump is designed as a 3" x 2‑1/2" end‑suction centrifugal unit, built from durable ductile iron to withstand harsh operating conditions. An enclosed 7.0" cast iron impeller provides efficient hydraulic performance, supporting flow rates up to 500 GPM (113.6 m³/h) and heads up to 190 ft (58 m).

Depending on installation needs, the discharge port can be supplied in either horizontal or vertical orientation. The unit is compatible with 215TC close‑coupled motors up to 20 HP (14.9 kW), ensuring flexibility across various industrial and OEM applications. With a maximum fluid temperature rating of 650°F (343°C), the HTW 300 is engineered for high‑temperature systems where safety, uptime, and longevity are critical.

Features & Benefits

Key Features

  • Patented isolated seal chamber
  • Dual cooling system (heat exchanger + fan clamp)
  • 3" x 2‑1/2" ANSI 150# flanged connections
  • Enclosed cast‑iron impeller
  • Compatible with standard 215TC NEMA C‑Face motors
  • Ductile iron construction for durability
  • Vertical or horizontal discharge configuration
  • High‑temperature capability up to 650°F (343°C)

Benefits

  • Extended seal life: Dramatically reduced seal chamber temperatures minimize wear and downtime.
  • Thermal stability: Reliable operation in extreme heat without compromising safety or performance.
  • Installation flexibility: Multiple discharge orientations accommodate tight system layouts.
  • High hydraulic performance: Supports elevated flow and head requirements for demanding processes.
  • Reduced maintenance: Rugged construction and optimized cooling minimize service intervals and operating costs.
  • Versatile fluid compatibility: Ideal for hot water, ethylene glycol, propylene glycol and triethylene glycol applications.

Specifications

 

Suction and Discharge 3" x 2-1/2" ANSI 150# flat flange 
Materials of Construction Ductile iron 
Flow Up to 500 GPM (113.6 m3/h) 
Head Feet Up to 190' (58 m) 
Impeller 7.0" (177.8 mm) cast iron, enclosed 
Motor Up to 20 HP (14.9 kW) 
Drive Options Close coupled 215TC 
Seal Carbon / silicon carbide / Viton 
Temperature 650°F (343°C) max