Wholesale Factory Ventilation Round Air Flow Volume PVA Back Draught Damper for Air Conditioning Duct

Basic Info

Model NO.	PVA
Material	Stainless Steel
Usage	for Air Conditioner
Application	Transportation
Shape	Round
Performance	Low Noise
Model Number	Back Draught Damper
Product Name	Duct Connector
Application Scenarios	Hotel, Industry
Function	Ventilation System
Feature	Durable
Transport Package	by Sea
Specification	standard
Trademark	Zengo
Origin	China
Production Capacity	20000

Product Description

PVA

Back Draught Damper

The pressure relief valve PVA is used for preventing the reverse of air flow in circular duct systems. The casing of PVA is made from galvanized steel, the blades are made of aluminium. With a inner foam seal for better tightness and noise reducing. The valve opens when overpressure occurs and closes by means of spring when the pressure drops. It is recommended to install the shutter into horizontal duct.