VP744R-5DZD1-03A: SMC VP744 Series 2-Position, 5-Port Solenoid Valve (Manifold Mounting Type, with Manual Override, with Indicator Light, AC220V Coil)

The VP744R-5DZD1-03A is a model from SMC Corporation Japan’s VP744 Series of 2-position, 5-port solenoid valves. It features a manifold mounting type structure, manual override function, an indicator light, and an AC220V coil. It is designed for directional control of actuators such as cylinders in industrial pneumatic systems, using electrical signals to control the flow direction of compressed air to achieve cylinder extension, retraction, and other movements.

I. Model Number Interpretation (According to SMC VP744 Series Naming Rules)

• VP744:​ VP744 Series, 2-position, 5-port solenoid valve, manifold mounting type, with manual override.
• R:​ With manual override function. Allows for valve position switching via a manual button.
• 5:​ 5-port valve. Features ports including P (supply), A/B (actuator), and R/S (exhaust).
• DZ:​ Solenoid coil type code. DZ indicates a coil with an indicator light, facilitating on-site confirmation of valve status.
• D1:​ Coil voltage code. D1 indicates AC220V coil.
• 03:​ Port size code. 03 indicates 3/8 thread size.
• A:​ Manifold mounting type. Facilitates centralized piping and saves installation space.

II. Main Technical Specifications

Parameter	Specification	Description
Series​	VP744	2-position, 5-port solenoid valve series, manifold mounting, with manual override.
Valve Position/Function​	2-position, 5-port	Control method, uses electrical signals to change the direction of compressed air flow.
Manual Override​	With Manual Override	Allows valve position switching via a manual button for debugging and maintenance.
Indicator Light​	With Indicator Light	Facilitates on-site confirmation of valve status, improving operational convenience.
Coil Voltage​	AC220V	Operating voltage of the solenoid coil, suitable for common industrial power supplies.
Port Size​	3/8	Size of piping ports for connection.
Applicable Fluid​	Air	Working medium, suitable for pneumatic systems.
Operating Pressure Range​	0.1–1.0 MPa	Recommended operating pressure range for proper valve function.
Maximum Operating Pressure​	1.0 MPa	Maximum allowable working pressure. Exceeding this may cause damage.
Proof Pressure​	1.5 MPa	Pressure test rating, verifying the valve’s pressure resistance.
Fluid Temperature Range​	-5 to 80 °C	Fluid temperature range for proper seal function.
Ambient Temperature Range​	-5 to 80 °C	Environmental temperature range for proper valve function.
Lubrication Requirement​	Non-lubricated	Does not require oil mist lubrication, simplifying the pneumatic circuit.
Port Thread Size​	M5×0.8 / Rc1/8	Air port thread size for piping connection.
Port Thread Type​	M5×0.8 / Rc1/8	Thread type of the ports, compatible with different piping needs.

III. Structure and Working Principle

1. Structural Composition

The VP744R-5DZD1-03A employs a 2-position, 5-port solenoid valve structure, primarily consisting of:

• Valve Body:​ Aluminum alloy material, integrates ports P (supply), A/B (actuator), R/S (exhaust). Features a manifold mounting design for centralized piping.
• Spool:​ Utilizes a spool structure. Actuated by electromagnetic force to change the air flow path.
• Solenoid Coil:​ AC220V coil. Controls spool movement via electrical signals. Includes an indicator light for status confirmation.
• Manual Override Mechanism:​ Equipped with a manual button for manual valve position switching, aiding debugging and maintenance.
• Indicator Light:​ Facilitates visual confirmation of the valve’s energized/de-energized state.
• Manifold Base:​ Designed for manifold mounting, enabling centralized piping and saving installation space.

2. Working Principle

The VP744R-5DZD1-03A operates based on the principle of a 2-position, 5-port solenoid valve:

• Initial/De-energized State:​ When the coil is de-energized, the spool is in its initial position. Typically, the P→A path is closed, and A→R is open, exhausting the rod side of the cylinder.
• Coil Energized State:​ When the coil is energized, it generates electromagnetic force, moving the spool. The P→B path opens, and B→S closes, supplying air to the cylinder’s blind side to extend the piston rod. Conversely, the spool’s position can be designed so that energizing changes the flow to P→A open and A→R closed, retracting the rod.
• Manual Override:​ The manual button can be used to manually switch the valve position for debugging and maintenance.
• Indicator Light:​ The light indicates the coil’s electrical status, aiding in visual troubleshooting.

IV. Features

• 2-Position, 5-Port Structure:​ Controls double-acting cylinders for extension, retraction, and other movements.
• Manifold Mounting Type:​ Simplifies installation and saves space by allowing multiple valves to be mounted on a common manifold.
• Manual Override:​ Enables manual control for setup, testing, and emergency operation.
• Indicator Light:​ Provides clear visual feedback of the valve’s electrical state.
• High Reliability:​ Spool valve design ensures reliable operation and long service life, suitable for high-speed automation.
• Non-lubricated Design:​ Eliminates the need for an air line lubricator, suitable for clean environments and simplifying maintenance.

V. Typical Application Scenarios

• Automated Production Lines:​ Controls directional changes for clamping, pushing, positioning actuators, ensuring stability and product quality.
• Robotics:​ Directs pneumatic actuators for robot arms, grippers, enabling precise motion control.
• Testing Equipment:​ Controls pneumatic actuators in test fixtures and positioning mechanisms, ensuring accurate and repeatable results.
• Packaging Machinery:​ Manages actuators for sealing, labeling, sorting operations, adapting to various process requirements.
• Conveyor Systems:​ Activates pushing, lifting, and stopping mechanisms for workpieces, suitable for space-constrained layouts.

VI. Installation and Usage Precautions

• Mounting Location:​ Install in an accessible location for operation and maintenance. Avoid areas with direct water splash or drip.
• Piping Connection:​ Ensure fluid flow direction matches the arrow on the valve body. Use thread seal tape or sealant to prevent leaks.
• Air Preparation:​ The air supply should be filtered and dried. Use clean, dry air free of deteriorating compressor oil to prevent contamination.
• Electrical Wiring:​ The coil is rated for AC220V. Ensure correct voltage and polarity for reliable operation. Connect the indicator light correctly.
• Manual Operation:​ Operate the manual override slowly to avoid shock from rapid switching. Use it for initial debugging to check valve function.
• Maintenance & Inspection:​ Regularly check for leaks at the valve and connections (e.g., using soap solution). Check and clean/replace air filters regularly to ensure clean air supply. If malfunction occurs, first check air pressure, piping, and wiring. Clean or replace the spool if necessary.

VII. Selection and Alternative Suggestions

• For different coil voltages, choose other models within the VP744 series, e.g., VP744R-5DZD2-03A (DC24V coil).
• For different port sizes, consider VP744R-5DZD1-02A (1/4 thread) or VP744R-5DZD1-06A (1/2 thread).
• For models without manual override, consider the VP744-5DZD1-03A.

Summary:​ The VP744R-5DZD1-03A is a compact and reliable 2-position, 5-port solenoid valve. Its design, featuring “manifold mounting + manual override + indicator light + AC220V coil + high reliability + good flow capacity,” provides high-flow, high-reliability directional control for industrial automation systems. It is an ideal choice for applications involving pneumatic actuators, robotics, testing equipment, and more.

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