High Quality Galvanized Steel round PVA Back Draft Damper HVAC Air Ventilation Volume Control One Way Shutter for Duct

• Customization: Available
• Material: Stainless Steel
• Usage: for Air Conditioner
• Model NO.: PVA
• Type: Round Diffuser
• Venetian-Style Air Layers: Single
• Installation: Outlet
• Certification: Factory Standard
• Surface Finish: Galvanization
• Use: Preventing The Reverse of Air-Flow in Circular Duc
• Shape: Round
• Performance: Low Noise
• Thickness: 0.8mm
• Function: Air Duct
• Transport Package: Standard Carton
• Specification: from 100mm to 400mm
• Trademark: Airandus
• Origin: China
• HS Code: 7616999000

Product Description

 

Back Draught Damper

 PVA

The pressure relief valve PVA is used for preventing the reverse of air-flow in circular
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 reducti.
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.

Model	ΦD(mm)	L1(mm)	L(mm)
PVB 100	96	6	88
PVB 125	121	19	88
PVB 150	146	31	88
PVB 160	155	36	88
PVB 200	197	56	88
PVB 250	247	61	128
PVB 315	312	94	128
PVB 355	352	65	198
PVB 400	397	64	198
PVB 450	447	80	248
PVB 500	497	107	248