Douglas ProTech HTF-PRO Inhibited Propylene Glycol Heat Transfer Fluid

Douglas ProTech HTF-PRO is a premium inhibited propylene glycol heat transfer fluid designed to provide outstanding freeze protection, corrosion protection, and efficient heat transfer in closed-loop heating and cooling systems.

Engineered for industrial and commercial applications, HTF-PRO helps protect valuable equipment, extend system life, and maintain reliable year-round performance.

Suitable for both single-wall and double-wall systems.

Recommended Applications

HTF-PRO is ideal for:

• HVAC systems
• Chiller systems
• Boiler systems
• Closed-loop refrigeration systems
• Block ice machines
• Circulating beer systems
• Food processing
• Breweries
• Wineries
• Dairy processing
• Pharmaceutical manufacturing
• Data centers
• Closed-loop solar heating systems
• Closed-loop radiant heating systems
• Wood boiler systems
• Other closed-loop heating and cooling applications

Features & Benefits

✔ Excellent heat transfer performance for efficient system operation

✔ Premium inhibited propylene glycol formulation

✔ Protects steel, copper, and aluminum from corrosion

✔ NSF Registered

• HT1 – Heat transfer fluids for incidental food contact
• HT2 – Heat transfer fluids where no food contact occurs

✔ Available with UV red or UV blue dye for fast leak detection

✔ Wide operating temperature range

✔ Non-flammable

✔ Low toxicity

✔ Readily biodegradable

✔ PFAS Free

✔ Generally Recognized As Safe (GRAS)

✔ Made in the USA

Product Specifications

Fluid Base

• Inhibited Propylene Glycol

Temperature Use Range

• 0°F to 250°F
• (-18°C to 121°C)

Maximum Operating Temperature

• 250°F (121°C)

Freeze Protection

• Approximately -28°F at a 50% dilution
• As low as -60°F when diluted to approximately 60%, depending on application requirements

Physical Properties (Concentrate)

• Weight: 8.77 lb/gal
• Specific Gravity @ 60°F: 1.050–1.060
• pH (50% dilution): 9.0–10.0
• Reserve Alkalinity: 9.8 minimum

Corrosion Protection

HTF-PRO contains a premium inhibitor package formulated to protect steel, copper, and aluminum components against corrosion during long-term operation in closed-loop systems, helping maximize equipment life and maintain system performance.

Mixing Instructions

HTF-PRO concentrate should be diluted with deionized water to achieve the freeze protection required for your specific application.

Douglas ProTech also offers custom glycol formulations to meet unique system requirements.

Available Colors

• Clear
• Red UV
• Blue UV

Red dye is ideal for leak detection, while blue and clear formulations are available for systems requiring alternate identification.

Packaging

• 1 Gallon Bottles
• Case (6 × 1 Gallon)
• 5 Gallon Pails
• 55 Gallon Drums
• Larger totes available
• Bulk tanker truck quantities available

Part Numbers

Clear

• HTF-PRO-1G
• HTF-PRO-6G
• HTF-PRO-5G
• HTF-PRO-55G (Call for Quote)

Red

• HTF-PRO-RED-1G
• HTF-PRO-RED-6G
• HTF-PRO-RED-5G
• HTF-PRO-RED-55G (Call for Quote)

Blue

• HTF-PRO-BLUE-1G
• HTF-PRO-BLUE-6G
• HTF-PRO-BLUE-5G
• HTF-PRO-BLUE-55G (Call for Quote)

Why Choose Douglas ProTech HTF-PRO?

Whether you're protecting an HVAC system, industrial chiller, brewery, food processing line, solar heating system, or pharmaceutical process, Douglas ProTech HTF-PRO delivers dependable freeze protection, superior corrosion resistance, excellent heat transfer performance, and long service life.