Galvanized Steel Back-Draft Adjustable Damper

• Material: Galvanized Steel and Aluminum
• Usage: Industrial
• Application: Industrial, Ventilation System
• Shape: Round
• Performance: Low Noise
• Flap: Yes
• Model NO.: PVA/PVB
• Transport Package: Carton, Pallet
• Specification: 100-400mm
• Trademark: SuperAir, OEM.
• Origin: China
• Production Capacity: 1000000PCS

Product Description

Back Draught Damper, PVA/PVB
- 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.