PP damper and air volume control valve are indispensable central air conditioning terminal accessories in the ventilation, air conditioning, and air purification engineering of industrial plants and civil buildings. They are generally used in air conditioning and ventilation system pipes to adjust the branch pipes' air volume. It can also be used The mixed adjustment of fresh air and return air is used as a gas medium to adjust the flow or cut off the dust in the dusty cold air or hot air gas pipeline of the ventilation and environmental protection projects in the hardware, chemical, building materials, power station, glass, and other industries. According to the operation, it can be divided into manual damper and electric damper. pp windpipe

Performance characteristics of PP damper

The electric air valve is composed of the electric actuator and valve body. Electric butterfly valve usually consists of angular stroke electric actuator (0～90°partial rotation) and the butterfly valve as a whole through mechanical connection. The active mode is classified into the on-off type and regulating type, and the latter two are general. It is a straight thread electric actuator (0～100), and the valve body is mechanically connected with PP packing.

Features of the electric damper

1. It is designed and manufactured by adopting a new structural form of welding of mid-line disc plate and temporary structure steel plate. It has a compact structure, lightweight, easy installation, low flow resistance, large circulation, avoids the influence of high-temperature expansion, and is easy to operate.

2. There are no connecting rods, bolts, etc., so it works reliably and has a long service life. It can be installed in multiple positions and is not affected by the flow direction of the medium.

Use:

This butterfly valve is a non-closed butterfly valve, which is widely used in the production process of building materials, metallurgy, mining, electric power, and other production processes on pipelines with a medium temperature of ≤300℃ and a nominal pressure of 0.1Mpa to communicate, open and close or adjust the amount of medium.

Structural features:

This butterfly valve is designed and manufactured by adopting a new type of structure welded between a centerline disc plate and a temporary structure steel plate. It is compact in format, light in weight, easy to install, small in flow resistance, large inflow, and easy to operate. There are no connecting rods, bolts, etc., in the body, reliable work, and long service life. It can be installed in multiple positions and is not affected by the flow direction of the medium.

Working principle:

The butterfly valve is driven by a motor to go to the actuator. The disc can rotate freely within the range of 90° to achieve the purpose of opening and closing or adjusting the flow of the medium.

Electric damper Uses and characteristics

This valve is made of the same material as the valve body and processed into a sealing ring, which adopts electric or pneumatic transmission. The applicable temperature depends on the material selection of the valve body, and the nominal pressure is ≤0.6MPa. Generally, it is suitable for industrial, metallurgical, environmental protection, and other pipelines for ventilation and media flow adjustment. Its main features are:

• Novel and practical design, unique structure, lightweight, and rapid opening and closing.

• Small operating torque, convenient operation, labor-saving and dexterous.

• Use suitable materials to meet the requirements of low, medium, and high medium temperatures and corrosive mediums.

• Electric damper adopts standard

Design standard: GB/T12238-1989 JB/T8692-1998

Flange connection size: GB/T9115.1-2000

Structure length h: GB/T12221-1989

Pressure test: GB/T13927-1992; JB/T9092-1999

Electric damper actuator

Adopt the new series of GT electric actuators, double-acting and single-acting (spring reset), gear transmission, safe and reliable; large-diameter valves adopt series AW-type pneumatic actuators with fork drive, reasonable structure, ample output torque; there are double-acting and single-acting.

• Geared double pistons, ample output torque, and small volume.

• The cylinder is made of aluminum gold material, which is light in weight and beautiful in appearance.

• Manual operating mechanism can be installed on the top and bottom.

• The rack-and-pinion connection can adjust the opening angle and rated flow.

• The actuator can be equipped with electrical signal feedback instructions and various accessories to realize automatic operation.

• IS05211 standard connection provides convenience for product installation and replacement.

• The joint screws adjusted at both ends can make the standard product have an adjustable range of ±4° between 0° and 90°. Ensure the synchronization accuracy with the valve.

The option of electric damper and accessories

The following accessories can be selected according to different controls and requirements:

Cut-off accessories: single solenoid valve, double solenoid valve, limit switch echo device.

Adjustable accessories: electric positioner, pneumatic positioner, electric converter.

Air source treatment accessories: air filter pressure reducing valve, air source treatment triple pieces.

Manual mechanism: HVSD manual mechanism

Performance characteristics of PP damper

Features of the manual damper

(1) The connecting pipe size of the split multi-leaf air volume regulating valve is the same as the rectangular air pipe size stipulated by the national ventilation duct standardization.

(2) The manual air valve blades are side-opening and forward-opening and are used as regulating valves in ventilation, air conditioning, and air purification systems.

(3) Tested and measured, the air volume regulating valve has good air tightness, and its relative air leakage is about 5%, and the regulating performance is good.

The structural characteristics of the manual damper

(1) The manual air valve is unified into four specifications in the blade width. The blade shape is a diamond-shaped double blade. The blades are softly overlapped, so the sealing performance is good.

(3) The manual air valve body frame is formed by cold-rolling 2mm galvanized sheet, then it is welded by carbon dioxide gas shielded welding or processed and welded from ordinary Q235 board; the blade is cold-rolled with 1mm galvanized sheet into a corrugated shape, two pieces Synthetic spot-welded square shaft, or 2mm G235 steel plate cold-formed, single-piece punched square shaft or welded round shaft.

The scope of application of the air volume control valve

It is widely used in industrial, mining, and civil building HVAC systems to adjust airflow accurately. It is one of the vital equipment to control ventilation modes in various environments. Its main features are flexible operation, low noise, small leakage (closed type leakage <0.5%), wide operating temperature range, reliable structure, safety, and convenience.