Relief damper is also referred to as relief valve with function to adjust and maintain the required pressure difference between outside and inside of a clean room; such a pressure relief damper may avoid foreign contaminated air from entering the room and interior gas from leak out, achieving to maintain the required negative pressure.

Model		PD-46	PD-24	PD-35
Adaptable voltage		Positive pressure		Negative pressure
Common dimensions HxW(mm)		400x600	200x400 350x550	350x550
Perforated dimensions HxW(mm)		360x560	210x410 360x560	360x560
	Unit	Pre-painted steel sheet ￭ Stainless steel
	Pressure plate	Aluminum sheet
Pressure adjustment		0.5~2.5 mmWG		0.5~2.0 mmWG
Processed volume		2~5m3 /min	0.15~0.44m3 /min
Alert function				Buzzing indicator light
Power supply				110V/220V