SY Series Pneumatic Solenoid Valve

Models: SY3120 / SY5120 / SY7120

The SY series is a compact, high-flow 5-port solenoid valve used for controlling double-acting pneumatic cylinders in industrial automation systems. It is widely applied in assembly lines, robotic tooling, jigs, packaging machines, and automotive production equipment.

Below is a detailed technical explanation of each model group.

1) SY3120 – Small Body Type

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General Characteristics

• Series: SY3000

• Valve type: 5-port, 2-position (5/2 way)

• Size class: Compact / small actuator control

• Typical port size: M5

• Mounting: Body ported or manifold

Flow & Performance

• Effective orifice area: approx. 5.6 mm²

• Cv value: approx. 0.3

• Operating pressure range: 0.15 – 0.7 MPa

• Response time: approx. 10–15 ms

• Power consumption: approx. 0.4 W (low watt coil)

Application Scope

Best suited for:

• Small bore cylinders (Ø16–Ø32 mm)

• Mini clamping units

• Small pick-and-place grippers

• Compact automation equipment

Advantages

• Very small footprint

• Low air consumption

• Ideal for tight panel space

2) SY5120 – Medium Body Type

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General Characteristics

• Series: SY5000

• Valve type: 5-port, 2-position (5/2 way)

• Size class: Medium flow control

• Typical port size:

  • 01 = Rc 1/8

  • 02 = Rc 1/4

• Mounting: Body ported or manifold

Flow & Performance

• Effective orifice area: approx. 14 mm²

• Cv value: approx. 0.8

• Operating pressure range: 0.1 – 0.7 MPa

• Response time: approx. 12–18 ms

• Power consumption: approx. 0.4–0.5 W

Application Scope

Best suited for:

• Medium cylinders (Ø32–Ø63 mm)

• Fixture clamp systems

• Conveyor stopper mechanisms

• Assembly automation stations

Advantages

• Balanced size and airflow

• Most commonly used SY model worldwide

• Excellent manifold integration

3) SY7120 – Large Body Type

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General Characteristics

• Series: SY7000

• Valve type: 5-port, 2-position (5/2 way)

• Size class: High flow

• Typical port size:

  • 02 = Rc 1/4

  • 03 = Rc 3/8

• Mounting: Body ported or manifold

Flow & Performance

• Effective orifice area: approx. 25 mm²

• Cv value: approx. 1.4

• Operating pressure range: 0.1 – 0.7 MPa

• Response time: approx. 15–25 ms

• Power consumption: approx. 0.5 W

Application Scope

Best suited for:

• Large cylinders (Ø63–Ø100 mm)

• Heavy clamping systems

• High-speed air consumption machinery

• Packaging or pressing systems

Advantages

• High airflow capacity

• Suitable for fast, long-stroke cylinders

• Stable switching under higher load

4) Valve Functional Code Explanation (Common Suffixes)

Example:
SY5120-5LZD-01-DC24

120 Meaning

• 1 = 5 port valve

• 2 = 2 position

• 0 = Single solenoid, spring return

For comparison:

• 122 = Double solenoid (bi-stable)

5) Coil & Electrical Codes

5LZD

• LZ = Built-in surge suppressor

• D = LED indicator

• 5 = Standard type

Voltage Options

• DC24 = 24V DC

• AC220V = 220V AC

• DC12 = 12V DC

Industrial PLC systems typically use DC24V.

6) Thread & Port Code

7) Internal Operation Principle

When the solenoid coil is energized:

1. Electromagnetic force shifts internal spool

2. Air supply (P) connects to output A or B

3. Opposite port exhausts

4. Cylinder moves

When de-energized (single solenoid type):

• Spring returns spool to default position

Double solenoid type:

• Holds last position until opposite coil is energized

8) Selection Guidance by Cylinder Size

Selection should consider:

• Required stroke speed

• Air pressure

• Tube length

• Flow demand

9) Typical Industrial Integration

• Controlled by PLC digital output (24V DC)

• Mounted on manifold base for multi-valve system

• Often integrated in control cabinet

• Used with FRL unit (Filter-Regulator-Lubricator)