Danfoss 31622111LF 1″ NPT Thermostatic Mixing Valve, 85-120°F

The Danfoss 31622111LF is a 1″ NPT thermostatic mixing valve engineered to deliver precise, consistent outlet water temperatures in hydronic heating and domestic hot water systems. With a factory-set temperature range of 85–120°F, this valve automatically blends hot and cold water supplies to maintain a safe, steady mixed outlet temperature — protecting occupants from scalding while maximizing system efficiency.

Built to Danfoss’s exacting quality standards, the 31622111LF is an ideal solution for residential and light commercial applications including boiler system protection, radiant floor heating circuits, domestic hot water tempering, and anti-scald installations.

Key Features

• 1″ NPT connections for straightforward installation into standard piping systems
• Temperature mixing range: 85–120°F for precise outlet control
• Thermostatic self-regulating design — no external power required
• Automatic blending of hot and cold water to maintain set outlet temperature
• Protects against scalding and thermal shock in domestic and hydronic applications
• Durable construction suited for residential and light commercial use
• Danfoss quality engineering for long-lasting, reliable performance

Typical Applications

• Domestic hot water tempering and anti-scald protection
• Boiler return water temperature protection
• Radiant floor heating supply circuits
• Hydronic system mixing stations
• Plumbing and HVAC mixed water systems

Specifications

• Brand: Danfoss
• Model / SKU: 31622111LF
• Connection Size: 1″ NPT
• Temperature Range: 85–120°F
• Valve Type: Thermostatic Mixing Valve