The Danfoss 020-1012 (NRV 12s) is a professional-grade

High-Temperature Durability: Engineered to hold structural integrity under constant thermal stress without degrading or becoming brittle

The Armstrong International A21348-1 Gasket is the specific OEM replacement gasket required to maintain a pressure-tight seal on B2 and B3 Series Float & Thermostatic Steam Traps

Extended Lead Length: The 34-inch wire provides ample reach for versatile mounting locations within the burner compartment

Engineered Precision: Strictly conforms to SAE J513 refrigeration standards for consistent thread engagement and sealing

ZoneFirst PIRR Relay The Danfoss 020-1012 (NRV 12s)The ZoneFirst PIRR is a 24Vac 4PDT Plug In Relay engineered as a direct high performance replacement for RR and RMABS relays. Designed for immediate integration into the 4PDR relay socket, this "ice cube" style component is a fundamental requirement for maintaining legacy electromechanical zone control panels, including older TAT Mark IV, V, VII, VIII, XXXI II, and MM 2 3 systems. This relay features gold flashed silver alloy contacts rated for 3A at