butterfly adjustable releasing duct valve

butterfly adjustable releasing duct valve

Quick Details

Type: HVAC Systems
Material: Galvanized Steel
FactoryCertificate: ISO9001:2008; ISO14001:2004; GB/T 28001-2001
Valve thickness: 2mm
Operating Sensor: None; 70 degrees; 150 degrees; 280 degrees
Operating voltage: DC24V
Media: Gas; smoke; oil.
Air Leakage: Less than the national standards
Size: According to duct size or as customer's request.
Color: Any color as customer's request.
OEM: Valid

Product Description

Usually it is open, manually adjust the leaf opening at the range of 0-90 degree .When the temperature of flue gas in the pipeline reach 280 degrees, the fuse protector will be fused, and damper closes under the pull of spring.


Applied to the pipeline of smoke exhaust system and the entrance of smoke exhaust fan


  1. Using galvanized steel as material to make sure good insulation performance, fire & corrosion resistance.
  2. Duration, long service life.
  3. Easy installation.
  4. The flange is bended directly by the frame.
  5. The valve size and color can be customized according to customer's requirements.
  6. Output closing signal according to customer's requirements.



  1. Excellent quality control processes, all products have been inspected strictly.
  2. The quality of products has reached the standard of “Code of acceptance for construction quality of ventilation and air conditioning works" (GB50243-2002) and "Fire dampers for building venting and smoke-venting system".
  3. Complete accessories production and distribution make it easier to install.



1Flange widthValve side length (MM)Width (MM)
2MaterialAdopt high quality galvanized steel, riveting by non-rivet method
3Valve thicknessδ2.0MM high quality galvanized sheet
4Blade shaftΦ12 round steel
5Shaft sleeveBrass
6Steel valve surface anticorrosive disposalPickling, phosphating then spraying.


fuse protector

280 degrees
8Control mechanism classificationManual on and off device, temperature control, air regulation, output signal
9Micro switchContact capacity 380V  3A
10Connection portContact rating 500V  3A
11Action methodAt 280 degrees, temperature-fuse protector motion, the valve under the spring pulled shut automatically, 0-90 degrees manually adjust the blade opening angle.
12Reset methodManual reset
13Air leakageIn standard conditions, as the differential pressure is 300 Pa, the air leakage is less than the national standards.



Our Services

  1. Your inquiry and question will be replied within 24 hours.
  2. Professional foreign sales staff gives you best service.
  3. Our products include: ventilation fan, air duct, air valve, air vent, plenum chamber, muffler, soft connecter and accessories
  4. All our products will be provided with best quotation, excellent quality and prompt delivery.
  5. Sample is available by express.
  6. OEM is available.