What does "Normally Closed" mean for this model

This valve is rated for a maximum steam pressure of 110 PSI and a maximum static pressure of 200 PSI

Leak Prevention: Eliminates the risk of flue gas leakage into the mechanical room

Can this sensor be used for chilled water and hot water applications

often caused by seized sleeve bearings or a degraded capacitor

Trane FLR8619 Filter 318518-761 What does "Normally Closed" meanProfessional grade Trane FLR8619 (also identified as FLR08619) air filtration sets are engineered for critical particulate management in high performance air handling systems. As a genuine OEM Trane replacement air filter, this set of two high capacity pads is specifically designed to interface with TERVR200 and TERVR300 energy recovery ventilator models. These filters utilize a MERV 8 efficiency rating to effectively capture airborne contaminants,