Taiwan SHAKO PU520-02-S 5/2-Way Solenoid Valve

Not SMC, it is a 5/2-way 솔레노이드 밸브 manufactured by Taiwan SHAKO. Often mislabeled as SMC in the market.

PU520-02-S Technical Specifications

밸브 종류: 5/2-방법, 단일 솔레노이드, 봄 귀환

작동: Internal pilot operated

포트: P/A/B ports G1/4 (02), R/S exhaust ports G1/8

Effective cross-sectional area: 18 mm²

작동 압력: 0.15-0.8 MPa (1.5-8 kgf/cm²)

내압: 0.99 MPa

메디아: 압축공기, filtration accuracy 40 μm, oil-free lubrication acceptable

주변 온도: -10~+50℃

보호 등급: IP65; Insulation class F

Duty cycle: 100% 지속적인 작동

밸브 본체: Anodized aluminum alloy; 무게 약. 270 g

수동 오버라이드: Lockable manual button

Standard coil voltages: DC24V, AC110V, AC220V; other voltages optional

모델 디코딩

Alternative Selection

1. SMC equivalent reference: SY5120-02 (G1/4, 5/2-way single solenoid, internal pilot)
2. 국내 대안: 4V310-08 (G1/4, comparable flow capacity)

애플리케이션 노트

1. Minimum supply pressure for internal pilot version is 0.15 MPa. It will fail to shift below this pressure. For low-pressure conditions use external-pilot type PU520A-02-에스.
2. Coil uses DIN socket. Provide waterproof protection for outdoor installation.
3. 수동 오버라이드: Press to lock, rotate to release, used for cylinder commissioning without power supply.

Operating Principle of SHAKO PU520-02-S (Internal Pilot 5/2-Way Single Solenoid Valve)

Assembly consists of two parts: Upper pilot assembly (코일 + small pilot spool) + Main spool assembly (main spool + 복귀 스프링).

The coil only drives a small pilot valve. The main spool is not driven directly by electromagnetic force; it is actuated by air pressure differential. Internal-pilot design requires supply pressure ≥0.15 MPa for proper shifting.

Port Definition

피: Air supply inlet (G1/4)

에이, 비: Connect to two chambers of double-acting cylinder

아르 자형, 에스: Exhaust ports, normally fitted with silencers

1. 코일에 전원이 공급되지 않음 (상태, 봄 귀환)

Return spring pushes main spool to home position.

Air circuit path:

P → B supply air; A → R exhaust

Compressed air outputs from port B to one side of cylinder; air from opposite cylinder chamber exhausts through port A to atmosphere. Cylinder stays retracted / home position.

2. 코일에 전원이 공급됨 (Shift action)
3. 코일에 전원이 공급됨, electromagnetic force pulls pilot armature, opens small internal pilot passage.
4. Supply air from port P flows through internal passages to control end of main spool.
5. Air pressure overcomes return spring force and shifts main spool assembly.
6. Main air circuit switches: P → A supply air; B → S exhaust.

Port A outputs compressed air to extend cylinder; exhaust air from cylinder opposite side discharges via port B through S port.

3. 코일에 전원이 공급되지 않음, 자동 재설정

Electromagnetic force disappears, pilot spool resets and cuts pilot air supply.

Main spool returns to original position under return spring force. Air circuit reverts to de-energized state, cylinder automatically returns to home position.

⚠️ Key Points

1. Internal pilot relies on supply air pressure. No valve shifting below 0.15 MPa. For low-pressure scenarios select PU520A-02-에스 (external-pilot version with separate control air supply).
2. -S single solenoid: spring return on power loss. -D double solenoid: no return spring; maintains position upon power loss, requires opposite coil energization for reversal.
3. 수동 오버라이드: press and lock for forced shifting; rotate to release. Used for cylinder test without power.

Difference from Direct-Acting Solenoid Valves

직접 작용: Coil pushes main spool mechanically. Higher power consumption, lower flow rate, works at zero pressure.

PU520 internal pilot: 낮은 코일 전력, 지원하다 100% 지속적인 의무, 높은 흐름 용량, minimum operating air pressure required.

Application Scenarios of SHAKO PU520-02-S

Core characteristics: Internal-pilot 5/2-way single solenoid valve, G1/4 포트, drives double-acting cylinder, spring return when coil de-energized; minimum supply pressure ≥0.15 MPa.

Typical functions: Cylinder extend-retract reciprocation; pneumatic gripper opening/closing, stopper, 리프팅, pushing, clamping actions.

Machinery Industry Applications

1. 포장기계

수직의 / horizontal packaging machines, 케이스 실러, heat-sealing machines, bagging machines

Actions: Pushing material, material stopping, bag clamping, cutter cylinder, lifting stations

특징: Medium flow capacity, continuous energization, PLC-controlled cylinder reciprocation, widely used in packaging equipment.

2. Automation Conveyors & Assembly Equipment

Assembly jigs, transfer machines, sorting stations, conveyor stoppers

Actions: Stopper cylinders, lifting cylinders, push cylinders, simple fixtures

-S single-solenoid advantage: Automatic reset when signal drops; cylinder returns to safe position during fault conditions; saves PLC output points.

3. Rubber-Plastic & Injection Molding Auxiliary Equipment

Injection machine peripherals: grippers, door actuation, ejector mechanisms; extruder cutting units

Rubber machinery, compression molding pneumatic clamping, hopper gate actuation

4. 목공 기계

CNC routers, edge banding machines: workpiece clamping, material pushing, 멎는, positioning cylinders.

5. 인쇄 & 섬유기계

Printing press paper hold-down; textile machine pneumatic clamping, swing link reciprocating mechanisms.

6. 식품기계

Simple filling equipment, material sorting, pneumatic baffles.

메모: Standard anodized aluminum body, not for direct contact with food media; only controls clean compressed air.

General Tooling & Special-Purpose Machines

1. Pneumatic fixture jigs: Welding fixtures, test jigs; workpiece clamping, auto-release upon power failure.
2. Machine-tool pneumatic systems: Pneumatic chucks, 안전문, protective gate cylinders.
3. 자재 취급: Hopper dampers, flip gates, discharge mechanisms.

Unsuitable Working Conditions (선택의 함정)

1. Supply pressure persistently below 0.15 MPa: Internal-pilot cannot shift. Use PU520A-02-S external-pilot variant.
2. Position retention required after power loss: Do not use -S single solenoid; select -D double-solenoid with latching spool.
3. Zero-pressure start, vacuum circuits: 해당 없음.
4. Heavy-corrosion, exposed outdoor environments: Add coil protective cover; bare installation not recommended.
5. Explosive-hazard areas: Order E1 explosion-proof coil version.

Compatible Actuators & 부속품

Suitable cylinder bore: Φ32-Φ80 double-acting cylinders (G1/4 포트, 18 mm² flow area for medium-size cylinders).

부속품: Silencers, flow control throttles, manifold bases for multi-valve centralized mounting.

빠른 선택 참조

Core Advantages of SHAKO PU520-02-S Solenoid Valve

포지셔닝: Taiwan-made internal-pilot 5/2-way solenoid valve. Benchmarked against SMC SY5120 and Airtac 4V310. 높은 비용 대비 성능, 높은 흐름 용량, robust for industrial conditions. Widely deployed in packaging, conveyors and special-purpose automation machines.

1. Excellent Flow Performance

Effective sectional area 18 mm², G1/4 포트. Delivers high flow within compact footprint. Drives Φ32-Φ80 double-acting cylinders with fast response, avoids sluggish cylinder movement or insufficient thrust.

Body width only 26 mm, space-saving inside cabinets. Supports multi-valve stacking on MF520 manifold bases.

2. Robust Mechanical Construction

Anodized aluminum alloy valve body, abrasion and corrosion resistant. NBR spool seals resist oil contamination in factory compressed-air systems, long service life for continuous cyclic operation.

Coil rated for 100% 지속적인 의무 (ED100%), withstands permanent energization without burnout. Insulation class F, IP65 보호, good tolerance to workshop dust and humidity.

전압 옵션: DC24V, AC220V, AC110V. Optional LED indicator lamps, E1 explosion-proof coils for hazardous-area applications.

3. Convenient Commissioning & 유지

Lockable manual override button: Press to force spool shift; rotate to release. Permits cylinder testing without electrical power, great for on-site commissioning and troubleshooting.

Standard DIN socket connection. Coil can be replaced individually without removing entire valve body; reduces spare-part costs.

Two pilot configurations available: standard internal-pilot PU520-02-S; low-pressure PU520A-02-S external-pilot variant, same valve housing for flexible specification change.

4. Comprehensive Product Portfolio

Full series covers 5/2-way single / double solenoid, plus 5/3-way valves (center exhaust / center pressure / center closed). G / Rc / NPT thread options for domestic and export equipment.

-S spring-return improves safety by returning actuators to safe state on power loss; -D latching double-solenoid for gate mechanisms requiring position retention.

5. Cost-Effective Supply

Performance comparable to SMC SY5120 series at lower price point; higher reliability than low-end generic domestic valves, suitable for mass machine OEM.

Ample stock availability across domestic distributors; easy procurement and field replacement, widely adopted for custom automation machinery.

6. 제한사항 & 선택 참고 사항
7. Internal-pilot model requires minimum supply pressure ≥0.15 MPa. Use PU520A-02-S external-pilot for low-pressure air supply.
8. Not designed for ultra-high-frequency cycling (tens of cycles per second). Optimized for typical machine cycle rates.
9. Standard version not suitable for direct outdoor or heavy-corrosion exposure; add protective measures.

선택 요약

✅ Prefer PU520-02-S: 포장 기계, 컨베이어 라인, fixture jigs, general-purpose automation, stable air supply, seeking balance of performance and cost.

✅ Supply pressure below 0.15 MPa: Specify PU520A-02-S external pilot.

✅ Cylinder position must hold after power cut: Select PU520-02-D double solenoid.

SHAKO Main Solenoid Valve Models

SHAKO solenoid families: PU series (classic high-flow), BM series (new compact series), PU322 / BM320 (3/2-방법). 5-port valves for double-acting cylinders; 3-port valves for single-acting cylinders / 진공 흡입 컵.

PU Series (Classic Line, PU520-02-S belongs to this family)

Body width 26 mm, 고유량, compatible with MF520 manifolds. Suffix-A = external pilot for low-pressure operation.

5/2-웨이 솔레노이드 밸브

5/3-웨이 솔레노이드 밸브 (Dual-coil, cylinder intermediate stop)

PU530-02-D-X: Center exhaust, A/B ports vented, cylinder free-floating

PU530-02-D-Y: Center pressure, A/B ports pressurized

PU530-02-D-Z: Center closed, A/B ports sealed for cylinder position lock

Port options 02(G1/4), 03(G3/8), 04(G1/2).

3/2-Way PU322 Series (Suction cups, 단동 실린더)

PU322-02-S: G1/4, 단일 솔레노이드, 평상시 닫혀 있음

PU322-02-N-S: 상시 개방, air passes when coil de-energized

BM Series (New compact replacement for PU series)

Identical functional performance, interchangeable mounting dimensions, MF520 manifold compatible.

5/2-Way

BM520-02-S: G1/4 single solenoid spring return (direct equivalent to PU520-02-S)

BM520-02-D: G1/4 double solenoid

BM520A-02-S/D: External-pilot variants

BM520-03-S/D, BM520-04-S/D: Larger port sizes

5/3-Way

BM530-02-D-X (center exhaust), BM530-02-D-Y (center pressure), BM530-02-D-Z (center closed)

3/2-Way BM320 Series

BM320-01-S (G1/8), BM320-02-S (G1/4), for suction cups and single-acting cylinders.

Complete Suffix Definition (Order Reference)

Order example: PU520-02-S-9-L：PU520, G1/4 포트, 단일 솔레노이드, DC24V, with LED indicator.

Matching Manifold Bases

MF520-02-02: PU/BM520 manifold base, G1/4, 2-station; 03=3-station. Multi-station configurations available for centralized air supply and exhaust.

빠른 선택 가이드

1. Standard automation, cylinder auto-retract on power loss: PU520-02-S / BM520-02-S
2. Cylinder position retention required after power-off: Select -D double solenoid
3. Supply pressure below 0.15 MPa: Order external-pilot variant PU520A-02-에스
4. Cylinder intermediate stop function: PU530 / BM530 5/3-way (choose center-exhaust / center-pressure / center-closed)
5. Suction cup or spring-return single-acting cylinder: PU322 / BM320 3/2-way

PU vs BM Series Comparison