Mar 29, 2024 · A non-return damper or NRD only allows air to flow in one direction. In HVAC, non-return dampers are mostly found either before or after ventilation fans, especially for fans with a combined air plenum box.

Volume Control Damper (VCD) technology in HVAC systems involves using dampers designed to control and regulate airflow within the heating, ventilation, and air conditioning systems. These dampers are essential components for maintaining temperature, air distribution and air quality in various zones of a building.

Non-Return Dampers are used to ensure air travels in one direction only and stop air being drawn into a system when the system is not in use. Volume Control Dampers are designed to …

Our Aluminium interlocking Blades are constructed with durable 6063 T5/T6 aluminium to a maximum length of 1200mm for VCD’s. Their 1.8mm thick edge is designed for minimal airflow resistance. As standard, opposed blades are supplied. We also offer parallel rotation and blade tip seals upon request.

The NRD and PRD are high integrity dampers designed to meet the demanding requirements of the HVAC markets where corrosion resistance, mechanical integrity and performance are primary factors. The PRD is used to relieve pressure and the NRD is used to prevent backflow through ventilation duct systems and openings.

Van NRD – Non Return Damper, là loại van gió 1 chiều. Van gió 1 chiều NRD có thiết kế khá giống với van VCD. Tuy nhiên, van VCD chỉ cho dòng không khí đi theo 1 chiều cố định. Khi dòng không khí đi theo chiều ngược lại, van sẽ tự động đóng kín. Van gió này thường sử dụng cho các hệ thống hút mùi.

Volume Control Damper is widely used in heating, ventilation and air-conditioning applications in order to maintain or control the air volume inside the duct. These dampers facilitate the air flow to each zone and each room to be controlled during testing & commissioning.

An essential component that plays a pivotal role in the HVAC systems' effectiveness is the Volume Control Damper (VCD). These devices are integral to managing and regulating airflow within duct systems, ensuring that air distribution is both efficient and precisely controlled.

A non return damper is designed to prevent air to flow through undesired / unwanted direction. In system operation mode, the blades of NRD opens letting air flows through. Else in non operating mode, blades close / shut o automatically due to its weight and …

TECNALCO models VCD-‘TR’/ ‘TR’- H are round volume control dampers designed to access easily with circular ducts. In these models the controlling blade is made of galvanised sheet steel perforated sheet of mild steel respectively.