In industrial dust filtration systems, especially Dust Collectors using filter bags, dust is continuously retained on the surface of the filter media during operation. As the dust layer gradually builds up, system resistance may increase and affect filtration performance and airflow.

To maintain the cleaning efficiency of the filter bags, Pulse Jet Cleaning – compressed-air pulse cleaning is used to clean the filter bag surface at defined intervals. In this configuration, the CQD-Z-40S-24V Pulse Jet Valve performs the opening/closing function of the pulse-air path, while the MCY-64 Controller controls the pulse sequence and duration.

The CQD-Z-40S belongs to the CQD Series Pulse Jet Valve manufactured by 辰延气动, and when combined with the MCY-64 Pulse Jet Controller, it provides a suitable solution for dust filtration systems requiring sequential control of multiple valves.

1. Overview of the CQD Pulse Jet Valve and MCY Controller System

1.1. What Is a CQD Pulse Jet Valve?

A Pulse Jet Valve is a device used in filter cleaning systems employing compressed-air pulses. When receiving a control signal, the valve rapidly opens/closes to deliver a quantity of compressed air into the blowing system, generating an air pulse that acts on the filter bags.

The air pulse causes the filter bags to flex for a short period, helping detach the dust layer accumulated on the surface and allowing the dust to fall into the dust collection hopper.

The CQD Series Pulse Jet Valve includes various configurations, including Y-type, Z-type and T-type valves with different models, sizes and control configurations. CQD-Z-40S is one of the models in the Z-type series.

1.2. What Is the MCY-64 Pulse Jet Controller?

MCY-64 is a controller designed for Pulse Jet Cleaning systems and configured as a Wall-mounted Type Pulse Jet Controller.

The controller sends signals to the solenoid valves according to a preset sequence, controlling the interval between pulse operations and the duration of each pulse.

Depending on the configuration, the MCY series can control different numbers of Lines. For a system using the MCY-64-12Line, the controller can be used to manage the operating sequence of 12 corresponding pulse-jet valve Lines.

1.3. Role of the Pulse Jet Valve in a Dust Filtration System

During filtration, dust is retained on the surface of the filter bags. If the bags are not cleaned periodically, the dust layer may continue to build up and increase system resistance.

The CQD-Z-40S-24V acts as the actuator within the pulse-cleaning cycle. When receiving a control signal, the valve enables the pulse-air cleaning process to clean the filter bags.

The system can therefore maintain the following cycle:

Dust filtration → dust accumulation → air pulse → filter bag cleaning → continued filtration.

1.4. Role of the Controller in the Pulse Jet Cleaning Cycle

If the valve is the component that directly performs the pulse operation, the controller determines when the valve operates and how long it operates.

The MCY-64 can set the interval between pulse operations and the pulse duration, allowing the valves to operate sequentially rather than simultaneously.

This sequential control method is particularly useful for systems equipped with multiple filter bags and multiple pulse-jet valves.

2. CQD-Z-40S-24V Pulse Jet Valve

2.1. Features of the CQD Series Pulse Jet Valve

The CQD Series Pulse Jet Valve is a valve series designed for compressed-air pulse cleaning systems.

The CQD series includes various models such as:

• CQD-Y-102S
• CQD-Y-102SX
• CQD-Y-90S
• CQD-Y-80S
• CQD-Y-76S
• CQD-Y-62S
• CQD-Y-50S
• CQD-Y-40S
• CQD-YA-40S
• CQD-Y-25
• CQD-Z-102S
• CQD-Z-90S
• CQD-Z-76S
• CQD-Z-62S
• CQD-Z-50S
• CQD-Z-40S
• CQD-Z-25
• together with CQD-ZM, CQD-ZFA and CQD-T configurations.

Among these, CQD-Z-40S-24V is the configuration selected for the system under consideration.

2.2. Construction and Operating Principle

In terms of function, a Pulse Jet Valve operates in two main states:

Standby state: the valve remains closed and does not generate a pulse.

Cleaning state: when receiving a control signal, the valve changes state for a short period to generate the pulse air required for cleaning.

The CQD-Z-40S-24V is connected to the control circuit using the appropriate control voltage. When the controller sends a signal, the valve performs the pulse cycle according to the preset timing.

2.3. Pulse Generation Mechanism for Filter Bag Cleaning

In a Pulse Jet system, compressed air is stored in the air system of the dust collector. When the Pulse Jet Valve is activated, the compressed air is released into the blowing system, generating a high-velocity air pulse for a short period.

The air pulse acts on the filter bags in the reverse direction of the filtration airflow, causing the dust layer accumulated on the bag surface to detach and fall into the dust collection hopper.

This cycle is performed sequentially on different groups of filter bags so that the cleaning process can be maintained without stopping the entire system.

2.4. CQD-Z-40S Model and 24V Configuration

The CQD-Z-40S-24V model can be understood according to the following configuration:

• CQD: Pulse Jet Valve series.
• Z: Valve configuration within the Z-type series.
• 40S: Valve model/size designation.
• 24V: Control voltage used in this configuration.

Correct voltage selection is important when integrating the valve with the controller. The power supply and control signal must be checked for compatibility before wiring and commissioning.

2.5. Other CQD Series Valve Models

In addition to the CQD-Z-40S, the CQD series includes various models designed to meet different valve and system configuration requirements.

Therefore, when selecting a replacement valve or designing a new system, the selection should not be based solely on the CQD series designation. The exact model, size, control voltage and connection configuration should be identified.

3. MCY-64-12Line Pulse Jet Controller

3.1. Overview of the Wall-mounted Type Pulse Jet Controller

The MCY-64 belongs to the Wall-mounted Type Pulse Jet Controller series and is designed to control the pulse-cleaning cycle of dust filtration systems.

The controller can be wall-mounted or integrated into a control box depending on the system configuration. This design allows operators to access the control and adjustment functions conveniently.

3.2. MCY-64 Configuration

The MCY-64 belongs to a controller series capable of controlling multiple Lines. The technical parameter table shows Output Line configurations of:

• 1–6 Lines
• 1–16 Lines
• 1–24 Lines
• 1–64 Lines.

With the MCY-64-12Line configuration, the system uses 12 control outputs for the corresponding pulse-jet valve Lines.

This allows the valves to be activated sequentially rather than simultaneously.

3.3. Multi-Line Control Capability

In a dust filtration system with a large number of filter bags, the number of pulse-jet valves may reach several dozen or more. If all valves operate simultaneously, the compressed-air system may need to supply a very high pulse flow within a short period.

Dividing the system into multiple Lines allows the cleaning process to be organized sequentially.

For example, with a 12-Line system:

Line 1 → Line 2 → Line 3 → … → Line 12 → back to Line 1.

The transition time from one Line to the next is determined by the controller settings.

3.4. Interval Time Between Pulse Cycles

The MCY-64 has an Interval Time Range of 1–250 seconds, allowing the interval between pulse operations to be adjusted.

The appropriate setting should be determined based on dust loading, dust characteristics, airflow, system resistance and actual operating requirements.

If the interval is too short, the system may perform pulse cleaning more frequently than necessary. Conversely, if the interval is too long, excessive dust may accumulate on the filter bags before the cleaning cycle is initiated.

3.5. Pulse Duration

The Pulse Duration of the controller is adjustable within a range of 1–999 ms.

This is the period during which the control signal is maintained to perform one pulse operation.

The pulse duration should be adjusted according to the actual system characteristics and compressed-air conditions rather than simply setting the longest possible pulse duration.

3.6. Control Signal and Power Supply

The MCY-64 features:

• Input Voltage: AC220V ±10%, 50–60Hz, customizable.
• Output Voltage: DC24V, AC220V, AC110V, depending on configuration.
• Output Current: 1A.
• Power Consumption: approximately 5W, excluding output load power; the image also indicates a maximum output power of 25W.

When using the MCY-64-12Line with the CQD-Z-40S-24V, the output-voltage configuration should be carefully checked to ensure compatibility with the valve.

4. Operating Principle of the MCY-64 and CQD-Z-40S-24V Combination

4.1. Controller Sends the Control Signal

The MCY-64 is programmed with the pulse-cleaning sequence. When the operating time for a particular Line is reached, the controller sends a signal to the corresponding output.

For example:

MCY-64 → Output Line 1 → CQD-Z-40S-24V → pulse operation.

After the preset interval, the controller switches to the next Line.

4.2. Solenoid Valve Activates the Air Pulse

When the CQD-Z-40S-24V receives the control signal, the valve changes state to perform the pulse-air operation.

The operating duration is determined by the signal from the controller.

4.3. Air Pulse Acts on the Filter Bags

Compressed air is released through the blowing system and generates an air pulse that acts on the filter bags.

The air pulse causes the dust layer accumulated on the filter surface to detach from the filter media.

4.4. Dust Is Removed from the Filter Surface

After being detached, the dust falls into the dust collection area of the equipment.

The filter bag returns to its operating condition with a reduced amount of dust accumulated on its surface.

4.5. Pulse Cleaning Cycle Repeats Automatically

After one Line is completed, the MCY-64 switches to the next Line.

The cycle is continuously repeated according to the preset interval, allowing the automatic cleaning process to be maintained.

5. Key Technical Specifications

5.1. CQD-Z-40S-24V Specifications

The valve model used in this configuration is:

Item	Information
Series	CQD Series Pulse Jet Valve
Model	CQD-Z-40S-24V
Type	Z Type
Control Voltage	24V
Application	Pulse Jet Dust Collector System

The CQD series also includes various models in Y, Z and T configurations.

5.2. 24V Control Voltage

The 24V configuration allows the CQD-Z-40S-24V to be selected for systems using a DC24V output control signal.

However, the complete control circuit should be checked before wiring, including output voltage, load current and wiring diagram.

5.3. MCY-64 Controller Specifications

Specification	MCY-64
Type	Wall-mounted Type Pulse Jet Controller
Configuration Used	12 Line
Controller Output Lines	Up to 64 Lines depending on configuration
Input Voltage	AC220V ±10%, 50–60Hz
Output Voltage	DC24V / AC220V / AC110V depending on configuration
Output Current	1A
Power Consumption	5W, excluding output load
Interval Time Range	1–250 s
Pulse Duration	1–999 ms
Working Environment	-25 to +60°C
Humidity	≤85% RH
Installation	Dust catcher or control box

The above values are based on the Technical Parameter table shown in the product image.

5.4. Power and Current

The MCY-64 has a specified maximum output current of 1A.

Therefore, when connecting multiple loads, the actual total load should be calculated and the controller configuration should be checked before commissioning.

5.5. Pulse Interval and Pulse Duration

The two parameters directly affecting the pulse-cleaning cycle are:

Interval Time: 1–250 seconds.

Pulse Duration: 1–999 ms.

The interval between pulses determines the cleaning frequency, while the Pulse Duration determines how long the control signal is maintained for each pulse operation.

5.6. Working Environment

The MCY-64 is designed for a working environment of -25°C to +60°C, with relative humidity not exceeding 85% RH. It should be protected from corrosive gases, excessive dust, abnormal vibration and mechanical shock.

6. Applications of CQD Pulse Jet Valves in Dust Filtration Systems

6.1. Bag Filter Systems

A typical application of the CQD-Z-40S-24V is in Bag Filter systems.

In these systems, the filter bags operate continuously to retain dust from the airflow. The Pulse Jet Cleaning cycle removes accumulated dust and helps maintain suitable operating conditions for the filter media.

6.2. Dust Collectors

The CQD Series can be used in Dust Collector systems requiring sequential control of multiple pulse-jet valves.

When combined with the MCY-64, operators can establish a suitable control sequence according to the number of valves in the system.

6.3. Industrial Dust Treatment Systems

Pulse Jet Valves can be considered for industrial dust collection systems in various production processes, particularly where dry particulate or dust is generated.

6.4. Cement and Building Material Plants

Grinding, conveying and material-handling processes can generate significant amounts of dust.

Bag-type dust filtration systems combined with Pulse Jet Cleaning are commonly used to control dust in these processes.

6.5. Powder Material Conveying and Handling Systems

The CQD-Z-40S-24V can also be considered for systems requiring periodic cleaning of filter bags during operation.

The specific valve model should be selected based on the equipment configuration, air piping, compressed-air pressure and actual operating requirements.

7. Selecting Valves and Controllers for a Pulse Jet System

7.1. Determine the Number of Pulse Jet Valves

The first step is to determine the total number of valves that need to be controlled.

If the system has 12 valves or is divided into 12 control groups, the MCY-64-12Line configuration can be considered for sequential control.

7.2. Select the Number of Control Lines

The number of controller Lines must correspond to the number of valves or valve groups in the system.

The controller should not be selected based only on the total number of filter bags. The actual Line distribution and control arrangement should also be determined.

7.3. Select the Control Voltage

The CQD-Z-40S-24V uses a 24V configuration, so the output voltage of the MCY-64 must be checked.

Compatibility between:

Controller Output → Coil/Valve → Voltage

is a basic requirement before commissioning the system.

7.4. Determine the Pulse Interval

The Interval Time should be adjusted according to the dust loading and the rate at which dust accumulates on the filter bags.

There is no single setting suitable for every system. The setting should be established based on the actual operating condition of the Dust Collector.

7.5. Check Compressed-Air Pressure and Supply

In addition to the electrical system, the compressed-air supply must meet the requirements of the valve and pulse-cleaning system.

The following should be checked:

• Compressed-air pressure.
• Airflow.
• Air receiver capacity.
• Air-piping diameter.
• Condition of air filtration and moisture separation.
• Leakage in the air piping.

If the compressed-air supply is unstable, the pulse-cleaning performance may still be inadequate even when the controller operates correctly.

8. Installation and Operation

8.1. CQD-Z-40S Installation

Before installation, check the model, connection direction, valve condition and related components.

The compressed-air piping should be cleaned to prevent dirt or foreign matter from entering the valve.

Connections should be securely tightened, but excessive force should be avoided to prevent damage to the valve body or threaded connections.

8.2. Connecting the Valve to the Controller

For the CQD-Z-40S-24V and MCY-64-12Line configuration, the following should be correctly identified:

Output Line → control wiring → corresponding valve.

For example:

• Output 1 → Valve 1
• Output 2 → Valve 2
• Output 3 → Valve 3
• …
• Output 12 → Valve 12.

The actual wiring diagram should be clearly labeled inside the control cabinet to facilitate future maintenance.

8.3. Setting the Pulse Cleaning Cycle

The setup procedure can be carried out as follows:

Step 1: Check the power supply to the MCY-64.

Step 2: Check that the output voltage is compatible with the valve.

Step 3: Determine the number of Lines in use.

Step 4: Set the Interval Time.

Step 5: Set the Pulse Duration.

Step 6: Check each Output Line.

Step 7: Observe the operation of each valve.

Step 8: Adjust the cycle according to the actual condition of the filter bags.

8.4. Checking Valve Signals and Operation

After wiring, each Line should be checked individually.

When Output 1 is activated, confirm that Valve 1 operates correctly. Then check the remaining Lines sequentially.

This inspection method helps minimize wiring errors or incorrect valve positioning.

8.5. Operating Precautions

The controller should be installed in a location protected from water, excessive moisture and mechanical impact.

The product image also specifies that the equipment should not operate in an environment containing corrosive gases, excessive dust, or severe vibration/shock.

9. Maintenance and Troubleshooting

9.1. Valve Does Not Generate a Pulse

If the CQD-Z-40S-24V does not operate, check the following in sequence:

1. Controller power supply.
2. Output voltage.
3. Signal at the Output Line.
4. Wiring.
5. Coil/valve.
6. Compressed-air supply.
7. Air-piping condition.

Checking from the control section through to the actuator section helps identify the location of the fault more efficiently.

9.2. Weak Air Pulse

If the valve operates but the air pulse is insufficient, check:

• Compressed-air pressure.
• Airflow.
• Air receiver capacity.
• Air piping.
• Leakage.
• Valve condition.
• Components related to the air discharge path.

The Pulse Duration should not simply be increased before the actual cause of the problem has been identified.

9.3. Unstable Valve Operation

Intermittent or unstable valve operation may be related to the power supply, control signal, wiring or compressed-air conditions.

The actual voltage at the valve should be checked rather than checking only the power supply at the controller.

9.4. Controller Does Not Send a Signal

If the MCY-64 cannot control the valves, check the input power supply, cycle settings, Output Line and wiring connections.

For a 12-Line system, clearly labeling each output terminal during installation will make subsequent troubleshooting more convenient.

9.5. Checking Electrical Wiring and Power Supply

Because the MCY-64 uses AC220V input and supports multiple output-voltage configurations, electrical wiring should be performed by qualified electrical personnel.

The output-voltage configuration or load wiring should not be changed without first confirming the wiring diagram of the specific controller version being used.

10. Why Use CQD Valves in Combination with an MCY Controller?

10.1. Active Pulse Cleaning Cycle Control

The CQD-Z-40S-24V combined with the MCY-64 allows the system to perform the pulse-cleaning cycle according to control signals rather than manually operating individual valves.

10.2. Suitable for Multi-Valve Systems

The MCY-64 supports multiple Output Line configurations, with the controller series capable of up to 64 Lines depending on configuration.

For a 12-Line system, the MCY-64-12Line helps organize the valves into clearly defined control groups.

10.3. Easy Pulse Cleaning Cycle Setting

The interval between pulses can be adjusted within a range of 1–250 seconds, while the Pulse Duration can be adjusted within 1–999 ms.

This allows operators to adjust the cleaning cycle according to the dust condition and actual requirements of the filtration system.

10.4. Supports Dust Filtration Performance

When the filter bags are cleaned periodically, the amount of dust accumulated on the surface can be better controlled, contributing to stable operating conditions for the filtration system.

Actual performance still depends on dust characteristics, filter media, Dust Collector design, compressed-air supply and operating conditions.

10.5. Suitable for Continuous-Operation Systems

Automating the pulse-cleaning cycle reduces dependence on manual operation and is suitable for dust filtration systems requiring continuous operation.

11. Conclusion

The CQD-Z-40S-24V Pulse Jet Valve is a configuration within the CQD Series Pulse Jet Valve, serving as the actuator in compressed-air pulse cleaning systems for filter bags. When combined with the MCY-64-12Line Controller, the system can sequentially control the pulse-jet valves according to the preset interval and pulse duration.

The MCY-64 supports multiple Line configurations, with an Interval Time of 1–250 seconds, Pulse Duration of 1–999 ms, AC220V ±10%, 50–60Hz input, and a maximum 1A output current. The MCY-64-12Line configuration is suitable for systems with 12 control Lines, while the CQD-Z-40S-24V provides a 24V valve-control configuration.

Correct selection and coordination of the CQD valve, MCY controller, compressed-air supply and filter bags are important factors in developing a stable Pulse Jet Cleaning system. With Line-by-Line control, operators can actively establish the pulse-cleaning sequence and adjust it according to the actual operating conditions of each industrial dust filtration system.