meaning it re-closes the circuit on its own once temperatures drop

Direct Cross-Reference: Certified as the direct replacement for 1NT21L-2163

Direct Drop-in Compatibility: Replaces Lennox 89M21 and 10511 without extensive piping modifications

Improved Efficiency: Creates a tighter seal than field-fabricated transitions

which is vital for system safety and operational efficiency

Siemens Building Technology VMP42.13(2) Valve Body 321894-706 meaning it re-closes the circuitThe Siemens Building Technology VMP42. 13(2) Valve Body is a rugged, ANSI Class 250 rated globe valve designed specifically for terminal unit applications in commercial systems. Featuring a 3 4 inch NPT threaded connection and a 1. 9 Cv flow coefficient, this bronze valve body is engineered to withstand high pressure differentials across fan coil units, induction units, and small reheat coils. The universal design allows for field configurable