Danfoss Thermostatic Expansion Valve

Diagram 1: Temperature and Brazing

Shows a system with a thermostatic expansion valve. Indicates a bulb temperature of 100°C (212°F) with 15% Ag brazing, and a pipe temperature of 120°C (250°F) with 700°C (1300°F) brazing.

Diagram 2: Torque Specifications

Illustrates connection points with torque values:

• 60 ± 5 Nm / 44 ± 3.7 ft lbs
• 40 ± 5 Nm / 29.5 ± 3.7 ft lbs

Diagram 3: Valve Assembly and Adjustment

Shows the assembly of the valve and provides adjustment instructions:

• Use Torx T25 driver.
• Max torque: 4 Nm (3 ft-lbs).
• Adjustment involves turning the spindle.

Diagram 4: Superheat Adjustment

Details how to adjust superheat (SH = t₁ - t_s):

• For N,B, NMOP, NM, NL types: Superheat is 4°C (7°F).
• For B,B MOP types: Superheat is 8°C (14°F).
• Adjustment is made by turning the spindle approximately 2-3 turns for N,B types and 1.5-2 turns for NMOP, BMOP, NM, NL types, with a 360° rotation indicated.

Diagram 5: System Pressure and Flow

Illustrates system pressure (P_s ~ t_s) and flow direction. Shows MOP (Maximum Operating Pressure) where t₂ > t₁.

Diagram 6: Valve Identification and Flow Path

Shows different valve types (TE 2) and indicates the correct flow path (OK) through the evaporator OD (Outer Diameter) and L (Length).

Diagram 7: Temperature Ranges

Provides temperature ranges for different valve designations:

• N: -40 - -10 °C / -40 – 60 °F
• NM: -40 - -5 °C / -40 – 25 °F
• NL: -40 - -15 °C / -40 – 5 °F
• B: -60 - -25 °C / -75 – 15 °F