SQ2131-51-C6: Inline 5-Port Solenoid Valve, The Precision Control Core for Industrial Automation

The SQ2131-51-C6 is an inline 5-port solenoid valve manufactured by SMC Corporation of Japan, belonging to the SQ2000 series. This solenoid valve utilizes an indirect pilot-operated structure, featuring benefits such as energy efficiency, easy installation, and simple maintenance. It is widely used in industrial automation control systems.

Core Product Advantages

1. Ultra-Low Power Consumption Design Incorporates an energy-saving coil, with power consumption as low as 0.4W (standard type), significantly reducing system energy usage. This is particularly suitable for applications requiring continuous, long-term operation.
2. Quick Installation and Maintenance Features an inline (plug-in) structure. Installation is completed with a single screw. The quick connector allows for tool-less change of the plug’s outlet direction with a simple press, greatly reducing maintenance time.
3. Flexible Configuration Options Offers 4-position, double 3-port valve specifications. Features a built-in optional back pressure check valve, enabling easy implementation of various control functions to meet diverse application needs.
4. Modular/Manifold Design Supports manifold mounting. Model series (e.g., SS5Q13, SS5Q14, SS5Q23, SS5Q24) allow for box-type integration of valves on a manifold base. This facilitates addition or removal of connections on DIN rails, enabling valve installation and replacement without disassembling the manifold.

Technical Parameters

Parameter Item	Specification Value	Description
Valve Series	SQ2000	Series specification
Port Size / Type	C6	Quick connector for Φ6 tubing, side port
Rated Voltage	DC24V	Standard industrial supply
Operating Pressure Range	0.15 ~ 0.7 MPa	Working pressure range
Maximum Operating Pressure	0.7 MPa	Max. allowable working pressure
Operating Fluid	Air	Compatible medium
Ambient Temperature	-10 ~ 50 °C	Operating temperature range
Flow Characteristic	Cv ≈ 0.19*	Flow capacity
Response Time	24 ms	Response speed
Power Consumption	0.4W	Ultra-low power design
Seal Method	Elastic Seal	Seal structure
Coil Specification	Standard	Standard type
Silencer	Without Silencer	Exhaust configuration

*Note: C value 0.79 dm³/(s·bar) is approximately equivalent to a Cv of 0.19.

Working Principle

The SQ2131-51-C6 employs an indirect pilot-operated solenoid valve structure. When the solenoid coil is energized, the electromagnetic force opens the pilot orifice. The pressure in the upper chamber rapidly decreases, creating a pressure differential (lower above, higher below) around the main sealing element. The fluid pressure pushes the element upward, opening the main valve. When de-energized, the spring force closes the pilot orifice. The inlet pressure quickly fills the chamber via a bypass passage, creating a pressure differential (lower below, higher above) around the sealing element. The fluid pressure pushes the element downward, closing the valve. This design allows the valve to operate under vacuum, negative pressure, or zero pressure conditions.

Typical Application Scenarios

1. Industrial Automation Production Lines Controls pneumatic actuator movements (e.g., cylinder extension/retraction, clamp operation) in automated lines for automotive manufacturing, electronics production, etc., improving production efficiency.
2. Packaging Machinery Manages pneumatic circuits for actions like marking, cutting, and lid opening in packaging machines, ensuring precision and stability in the production process.
3. Food Processing Equipment Used in pneumatic systems of food processing equipment to control material handling, packaging stages, and other processes, ensuring food safety and production efficiency.
4. Robotics Applied in robotic arm connections and material handling systems, providing flexible end-effectors for robots to grasp and manipulate complex workpieces.

Installation and Usage Precautions

1. Installation Requirements The solenoid valve should be installed vertically on a horizontal pipeline. The medium flow direction must align with the arrow on the valve body. An air filter and oil mist separator should be installed on the inlet side to ensure clean air supply.
2. Power Supply Requirements Use a DC24V power supply. Allowable voltage fluctuation is ±10% of the rated voltage to ensure proper valve operation.
3. Regular Maintenance Periodically inspect the filter element and clean contaminants promptly, typically every 2-3 months. Regularly check the solenoid valve’s operational performance to ensure long-term stable functioning.
4. Safe Operation Always depressurize the system before installation to prevent injury from high-pressure media release. Wiring must be performed with the system power off. Wear protective eyewear during commissioning for safety.

Summary

The SQ2131-51-C6 inline 5-port solenoid valve is the “intelligent control core” in the realm of industrial automation. It perfectly integrates ultra-low power consumption, rapid installation, and flexible configuration, delivering an efficient, reliable, and energy-saving pneumatic control solution for a wide range of industrial applications.

Choosing the SQ2131-51-C6 means choosing high reliability and low power consumption to drive your automation system towards greater efficiency!

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