Manual HVAC fire damper FH-70, installed in the ventilation or air-conditioning systems, usually it is open, once fire occurs, the gas temperature of duct arrives at 70 degrees, and then the fuse ...

HVAC air damper round volume control damper galvanized volume control damper for air supply US 6.5-26 / Piece 100 Piece/Pieces (Min.Order) Manual or electric Round Fire damper for HVAC system in good ...

A pilot relief valve is presented for valve-controlled semi-active damper, its working process is analyzed in detail, and its method of controlling oil flow is pointed out. Faced with the situation ...

Based on the research on the internal characteristic of the passive-suspension, in this paper, we get the piecewise linear damping coefficient of the two-mode variable damper, and the speed ...