The full name of PP duct damper is Duct Volume Control Damper, which is used to adjust the air volume in the exhaust gas treatment and exhaust pipeline, and is resistant to acid and alkali. The diameter below 315 is a one-time forming duct damper, and the diameter above 315 is made by manual processing. The PP duct damper is an accessory of the PP duct damper, which is indispensable in the exhaust engineering. Different, the air volume changes, each tuyere cannot guarantee the same air volume, so the PP air duct is installed with the tuyere to adjust the cross-sectional area of the tuyere and maintain a constant wind speed and air volume. The installation of PP duct damper linkage pressure controller and fan frequency converter in the exhaust system can control the air volume, reduce the frequency of the fan, and save energy and protect the environment.

In addition, in order to form a complete anti-corrosion pipeline system, in addition to PP straight pipes, it is not enough to have the following PP air duct accessories, which can be combined with the installation to form a complete anti-corrosion acid and alkali-resistant exhaust air pipeline system.

PP elbow

PP tee

PP reducer

PP flange

PP casing

PP duct damper

We collectively refer to the above products as PP air duct system

PP duct features

• Acid and alkali corrosion resistance: PP air ducts can withstand pH fluctuations within a certain temperature range, and high concentrations of acid and alkali corrosion ranging from 1 to 14.

• Wear resistance and no scaling: The inner wall of the PP air duct and its fittings is uniform and smooth, with low flow resistance and no scaling.

• Reduce vibration and noise: PP air duct has very good sound insulation performance, which can significantly reduce vibration and noise caused by gas flow.

• Anti-freeze cracking: PP material has excellent elasticity, so that the section of the air duct can expand with the hot and cold air temperature without bursting.

• Anti-condensation, less heat loss: PP material is a poor thermal conductor, which can reduce condensation.

• Simple installation: PP pipe is light in weight, easy to install and operate, and has weldability.

• Long service life: The PP pipe system has a lifespan of 50 years under the specified conditions of use.

There are two ways to connect PP air ducts

• Socket type connection, that is, a PP sleeve is welded at the end of each air duct to facilitate the insertion of the next air duct;

• Flange connection, that is, a PP flange is welded at both ends of each air duct, and the screw-to-lock connection is used during installation.

PP duct reinforcement method

In industrial exhaust, in most cases, the end centrifugal fan is used to exhaust air, and the pipeline forms a negative pressure, and the industry design specification stipulates the wall thickness and strengthening method of the PP air duct at a certain wind speed, usually the PP air duct The method of strengthening the outer flange, such as a 3-meter-long air duct, is strengthened by two flanges, which is beautiful and durable. The large square air duct is reinforced by the outer flange, and the internal PP circular pipe is used for structural support.

Ordering Notes

When ordering PP air ducts, please clarify the following points:

• Pipe diameter (pipe outer diameter);

• wall thickness;

• Connection method (socket or flange type);

• Strengthening method, (whether flange strengthening is required);

• Quantity (recommended length unit for air duct: meter);

• Shipping address (for easy calculation of logistics freight).