What is a pulse valve? What are the types of pulse valves?

Pulse valves are a crucial component in many industrial systems, particularly in dust collection and filtration setups. These valves, often referred to as pulse solenoid valves, are designed to deliver short, high-energy bursts of compressed air to clear dust and debris from filter bags or other components in a system. Unlike standard solenoid valves, which allow a continuous flow of fluids, pulse valves are specifically engineered to release compressed air in quick, impactful bursts. This article will explore how pulse valves work, the different types available, and their applications in various industries.

What is a Pulse Valve?

Pulse valves operate similarly to other two-way solenoid valves, but with a key difference: the inlet and outlet connections are positioned at a 90-degree angle(also known as right angle valve), allowing the valve to release air in powerful, short bursts. These bursts, or pulses, are critical in applications like dust collection, where they are used to shake off accumulated dust from filter bags. The valve typically remains closed and only opens when energized, releasing compressed air for just a fraction of a second. This design ensures that even if the valve is continuously powered, it will not allow a steady flow of air but will instead function as intended by delivering quick pulses.

The other 2-way solenoid valves are used for various clean liquid fluids, while right angle pulse valves only use compressed air. Therefore, two-way solenoid valves cannot be used instead of pulse valves.

Types of Pulse Valves

Pulse valves come in several configurations to suit different installation requirements and system designs. The main types include:

Threaded Pulse Valve

Union Connection Pulse Valve

Flange Connection Pulse Valve

Hose Connection Pulse Valve

Pulse Tank Installation Valve

Pulse Valve Design: Single vs. Double Diaphragm

Pulse valves are available in single or double diaphragm configurations:

Single Diaphragm Valves: These are typically used in smaller systems with connection sizes of 3/4" to 1". They are simple and effective for many standard applications.

Double Diaphragm Valves: Found in larger systems, these valves offer several advantages, including more powerful air bursts, better coverage for cleaning filter bags(increase 40%), and longer service life. The double diaphragm design allows for a faster pressure difference, resulting in a stronger impact and more efficient cleaning.

How Pulse Valves Operate

Pulse valves typically operate in two ways, depending on the design of the system:

1. Direct Connection: The pulse solenoid valve is directly connected to the system, and the coil controls the release of compressed air. This setup is common in systems where the valve is positioned close to the dust removal or filtration components.

2.Remote Control Setup: In more complex systems, the pulse valve may be connected via a remote control setup. The coil is placed away from the valve body, typically housed in a protective aluminum box to shield it from environmental factors like water or dust. This configuration allows the valve to be controlled remotely, often via a time relay that regulates the pulse intervals.

Pulse valves are widely used in industries like cement, ceramics, paints, power plants, concrete, detergents, glass, and steel. They effectively remove dust buildup in bag filters and prevent dust in silos from solidifying, ensuring smooth operation and maintaining clean production environments.