Fiberglass flange air valve DN250mm connected city

Fiberglass flange air valve DN250mm connected cityThe valve used for ventilation system is made of fiberglass material and installed on the air duct through flange connection. Fiberglass dampers are widely used in industrial and mining, civil building HVAC systems, as well as chemical, power, pharmaceutical, dye, smelting, sewage treatment and other industries to regulate air flow and control ventilation modes.

Fiberglass flange air valve DN250mm connected cityDrive mode:

Manual: Control the opening and closing of the air valve by manually operating the handle or handwheel, suitable for situations that do not require frequent adjustment or low control requirements.

Electric: Equipped with electric actuators, it can achieve remote control and automated operation, suitable for situations that require air volume control or linkage with other equipment.

Structure and material of fiberglass flange air valve

Material: Mainly made of resin and fiberglass, different types of resin can be selected according to the purpose and medium requirements of the air duct.

Structural hierarchy: generally includes an inner lining layer, which is a rich resin layer with a thickness of ≥ 1.2mm and has a corrosion-resistant effect; The anti-seepage layer prevents bubbles from adhering to the surface; The reinforcement layer consists of an inner reinforcement layer, a core sand layer, and an outer reinforcement layer, providing the rigidity and strength of the pipeline.

Characteristics of fiberglass flange air valve:

Corrosion resistance: It can withstand the erosion of corrosive media such as acid and alkali, and is suitable for corrosive environments such as chemical engineering and sewage treatment.

High strength: It has good water pressure resistance and external pressure resistance.

Good temperature resistance: can be used within the temperature range of -50 ℃ to 150 ℃.

Good sealing: The blades are usually split or open, with soft overlap and good air tightness.

Lightweight: Compared to metal air valves, fiberglass air valves are lighter in weight, making them easier to transport and install.

Installation and maintenance of DN250mm fiberglass flange air valve connected to the city

Installation: Adopting flange connection method, it can be matched with any material and standard flange for easy installation. Various sizes and specifications of products can be customized according to user needs.

Maintenance: Due to its corrosion resistance and other characteristics.

Fiberglass flange type air valve flange connection and fastening:

Fiberglass flange type air valve bolt insertion: Insert the bolt from one side of the flange hole, and put a washer and nut on the other side (the bolt should be threaded in the same direction, it is recommended to thread from the air duct side to the air valve side for subsequent tightening operations); The number of bolts should match the number of flange holes and should not be reduced (usually no less than 4 bolts for DN ≤ 300mm flanges, and no less than 3 bolts on each side for DN>300mm flanges);

Symmetrical fastening of fiberglass flange air valve: gradually tighten the nut using the "diagonal cross fastening method" to avoid flange deformation or uneven stress on the gasket caused by unilateral tightening first; The tightening force should be moderate, with the compression amount of the gasket being 1/3-1/2 of the original thickness (fiberglass flange material is brittle, excessive tightening can easily cause flange cracking, and the strength can be judged by observing the slight extrusion of sealant at the edge of the gasket);

Check the sealing of the fiberglass flange air valve: After tightening, gently push the air valve blades by hand to confirm that they rotate flexibly without any jamming; After closing the blades, soap water can be applied to the flange gap. If the system has been supplied with low-pressure air (≤ 500Pa), observe whether bubbles are generated. If there are no bubbles, the seal is qualified.