Product features:

Model Description:

VD positive pressure balancing device

“A×B； DN ": A × B rectangle: length ×; Width (inside the air duct); DN round type: duct diameter

Square shape of "100 × 100~500 × 1000"

DN100-DN1000 "circular

Product Features:

The positive pressure balance device is mainly used in places with positive and negative pressure. The pressure value of the positive pressure balance device is set to 50Pa. When the pressure difference is greater than or equal to 50Pa and less than 75Pa, the pressure difference transmitter outputs a signal to the electric control box, which feeds back the signal to the electric actuator. The actuator acts and the air door opens proportionally. When the pressure difference is greater than or equal to 75Pa, the air damper is fully opened. When the pressure difference is less than 50Pa and greater than 25Pa, the pressure difference transmitter sends an electrical signal to the control box, which converts the signal to the electric actuator. The electric actuator acts and the air door closes proportionally. When the pressure difference is less than or equal to 25Pa, the air damper is completely closed. Ensure that the pressure difference between the two ends of the air valve is within the set value. Control form: BELIMO electric actuator is used. Our company's positive pressure balancing device is designed for offshore working environments, which can effectively block the infiltration of water vapor and smoke, ensuring normal operation in such environments. It is particularly suitable for humid environments such as ships, offshore platforms, and underground engineering.

Product advantages:

Designed and manufactured using specialized fixtures, with minimal deformation, low air leakage when the air valve is fully closed, and good reliability; According to customer requirements, the shell can be made of stainless steel SUS316; Equipped with relevant signal feedback, it can achieve automated control: the shaft and blades are made of stainless steel SUS316L, the shaft sleeve is H62 maintenance free, and the air valve can be opened and closed freely.

Basic parameters:

• The shutdown time is less than 10 seconds,

• Leakage rate ≤ 5m3/m2

• Control power supply DC24V/AC110V/AC220V, 50/60Hz,

• Electrical protection level IP44/IP56,

• The shell is made of Q235-B and can be made of stainless steel SUS316 according to customer requirements;

• The rotating shaft is made of SUS316, the shaft sleeve is made of H62, and the blades are made of SUS316;

• The electric actuator adopts BELIMO electric actuator, which can be manually/electrically controlled;

Application scenarios:

The positive pressure balancing device is mainly used on the air ducts of ventilation and air conditioning systems. When the pressure difference between the duct and the two ends of the room is less than 50Pa, the air valve automatically opens/closes to ensure the pressure difference between the two ends. Widely used in various types of passenger ships, cargo ships, naval vessels, and offshore oil platforms.