Product features:
Model Description:
"VD" positive pressure balancing device
"A * B; DN ": A×B rectangle: length ×; Width (air duct inner stop); DN round: diameter of air duct
"100 x 100 ~ 500 x 1000" square
"DN100 - DN1000" circle
Product features:
The positive pressure balancing device is mainly used in places with positive and negative pressure. The positive pressure balancing device sets the pressure value of 50Pa. When the pressure difference is greater than or equal to 50Pa and less than 75Pa, the pressure difference transmitter outputs the signal to the electric control box, which feeds back the signal to the electric actuator, and the actuator acts, and the damper is opened proportionally. When the differential pressure is greater than or equal to 75Pa, the damper is fully open. When the pressure difference is less than 50Pa and greater than 25Pa, the pressure difference transmitter transmits electrical signals to the control box, and converts signals to the electric actuator through the electric control box. The electric actuator acts and the damper is closed proportionally. When the differential pressure is less than or equal to 25Pa, the damper closes completely. Make sure the pressure difference at both ends of the air valve is within the set value. Control form: BELIMO electric actuator. The positive pressure balancing device of our company is designed according to the offshore working environment, which can effectively prevent the infiltration of water vapor and smoke to ensure normal operation in such environment, especially suitable for ships, offshore platforms and underground projects and other humid environment.
Product advantages:
Design and production of special tooling, small deformation, low air leakage when the air valve is completely closed, good reliability and other characteristics; According to customer's requirements, the shell is made of stainless steel SUS316; Equipped with relevant signal feedback, can realize automatic control: rotating shaft and blade are made of stainless steel SUS316L, shaft sleeve adopts H62 maintenance free type, the air valve can be freely opened and closed.
Basic parameters：
● Closing time < 10S
● Air leakage ≤5m3/m2
● Control power supply DC24V/AC110V/AC220V, 50/60Hz
● Electrical protection class IP44/IP56
● The shell is made of Q235-B, and can be made of stainless steel SUS316 according to customer requirements
● Rotating shaft adopts SUS316, shaft sleeve adopts H62, blade adopts SUS316 production
● Electric actuator adopts BELIMO electric actuator, which can be manually/electrically controlled
Application：
The positive pressure balancing device is mainly used in the air duct of the ventilation and air conditioning system. When the pressure difference between the pipe and the room is less than 50Pa, the air valve will open/close automatically 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.