Basic Introduction to Common Type of Pulse Valves

Abstract 

This artical conducts an in-depth study on two common types of pulse valves: right-angle  and submerged, and elaborates on their structural characteristics, working principles, performance advantages and disadvantages. Combined with the actual needs of the industrial dust filtration field, it systematically analyzes the key basis for selection.

Keywords: pulse valve; right-angle type; threaded pulse valve, immersion pulse valve; ; pulse bag dust collector

1. Introduction  

In the process of industrial production, dust pollution has received increasing attention. As a highly efficient dust removal equipment, pulse bag dust collectors are widely used in many industries such as chemical industry, electric power, metallurgy, and building materials. As the core component of the pulse bag dust collector cleaning system, the performance of the pulse valve directly affects the cleaning effect and operating efficiency of the dust collector. Right-angle pulse valves and submerged pulse valves are the two most widely used types. In-depth understanding of their characteristics and selection basis is of great significance for optimizing the design of dust removal systems and improving dust removal efficiency. 

2. Right-angle pulse valve

 (I) Structural features

 The air inlet and outlet of the right-angle pulse valve are distributed at a right angle of 90°. This unique structural design gives it a certain degree of flexibility in spatial layout. A diaphragm is arranged in the valve body, which divides the air chamber in the valve into two parts, upper and lower. The upper part of the diaphragm is connected to an electromagnetic device and a spring, and the lower part is connected to the air inlet and outlet. The electromagnetic device and the spring together constitute the driving and reset mechanism of the diaphragm action, providing a basic structural guarantee for the normal operation of the pulse valve.

(II) Performance characteristics

The right-angle pulse valve has a compact structure and occupies a small space, which makes it have obvious advantages in some occasions with more stringent requirements on installation space. However, due to its relatively complex gas path structure, the gas encounters greater resistance during the flow process, resulting in relatively low injection efficiency. When the gas source pressure is low, the right-angle pulse valve can work normally and is suitable for small pulse bag dust collectors that do not have particularly high requirements for dust cleaning.

3. Immersion pulse valve (also called submerged type)

(I) Structural characteristics

The biggest feature of the immersion pulse valve is that the diaphragm is directly installed on the air bag, and the entire valve body is completely submerged in the air bag. This structural design greatly shortens the gas flow path and reduces the energy loss of the gas during transmission. The diaphragm directly controls the inlet and outlet of the gas in the air bag, and the surrounding sealing structure ensures the sealing of the gas in the air bag, providing good structural conditions for efficient injection.

(II) Performance characteristics

Due to its unique structure, the immersion pulse valve has low gas flow resistance, high injection efficiency, and can generate strong injection force and a long injection distance. It is suitable for occasions with large air volume and high dust removal requirements, and can work stably even under high air source pressure. However, since it needs to be installed on the air bag, it has certain requirements on the size and installation space of the air bag, and the overall equipment occupies a relatively large area.