Best Quality HVAC Back Draught Shutter Duct Damper with Rubber

• Usage: for Air Conditioner
• Certification: ISO
• Transport Package: Carton
• Specification: 100-400mm
• Trademark: SUPERAIR
• Origin: China
• Model NO.: PVAX
• Production Capacity: 50000/Month

Product Description

Best Quality HVAC Back Draught Shutter Duct Damper

-The pressure relief valve PVA/PVB is used for preventing the reverse

of air-flow in circular

duct systems.

- The casing of PVA/PVB is made from galvanized steel, the blades are

made of aluminium.

- PVA with a inner foam seal for better tightness and noise reduction.

- 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.

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