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

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

PU520-02-S Technical Specifications

نوع الصمام: 5/2-طريق, الملف اللولبي واحد, عودة الربيع

يشتغل: Internal pilot operated

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

Effective cross-sectional area: 18 mm²

ضغط التشغيل: 0.15-0.8 MPa (1.5-8 kgf/cm²)

ضغط إثبات: 0.99 MPa

Media: الهواء المضغوط, filtration accuracy 40 μm, oil-free lubrication acceptable

درجة الحرارة المحيطة: -10～+50℃

فئة الحماية: IP65; Insulation class F

Duty cycle: 100% عملية مستمرة

Valve body: Anodized aluminum alloy; Weight approx. 270 g

التجاوز اليدوي: Lockable manual button

Standard coil voltages: تيار مستمر 24 فولت, تيار متردد 110 فولت, تيار متردد 220 فولت; other voltages optional

فك تشفير النموذج

Alternative Selection

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

ملاحظات التطبيق

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-س.
2. Coil uses DIN socket. Provide waterproof protection for outdoor installation.
3. التجاوز اليدوي: 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 (لفائف + small pilot spool) + Main spool assembly (main spool + return spring).

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

ص: Air supply inlet (G1/4)

أ, ب: Connect to two chambers of double-acting cylinder

ر, س: Exhaust ports, normally fitted with silencers

1. تم إلغاء تنشيط الملف (الحالة الطبيعية, عودة الربيع)

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. Coil energized (Shift action)
3. Coil energized, 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. تم إلغاء تنشيط الملف, automatic reset

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-س (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. التجاوز اليدوي: press and lock for forced shifting; rotate to release. Used for cylinder test without power.

Difference from Direct-Acting Solenoid Valves

Direct-acting: Coil pushes main spool mechanically. Higher power consumption, lower flow rate, works at zero pressure.

PU520 internal pilot: Low coil power, يدعم 100% واجب مستمر, high flow capacity, minimum operating air pressure required.

Application Scenarios of SHAKO PU520-02-S

Core characteristics: Internal-pilot 5/2-way single solenoid valve, G1/4 port, 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, lifting, pushing, clamping actions.

Machinery Industry Applications

1. ماكينات التعبئة والتغليف

رَأسِيّ / ماكينات التعبئة والتغليف الأفقية, case sealers, heat-sealing machines, bagging machines

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

سمات: 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. Woodworking Machinery

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

5. الطباعة & آلات النسيج

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

6. Food Machinery

Simple filling equipment, material sorting, pneumatic baffles.

ملحوظة: 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, أبواب السلامة, protective gate cylinders.
3. Material handling: Hopper dampers, flip gates, discharge mechanisms.

Unsuitable Working Conditions (مطبات الاختيار)

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: Not applicable.
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 & مُكَمِّلات

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

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

Quick Selection Reference

Core Advantages of SHAKO PU520-02-S Solenoid Valve

تحديد المواقع: Taiwan-made internal-pilot 5/2-way solenoid valve. Benchmarked against SMC SY5120 and Airtac 4V310. أداء عالي التكلفة, high flow capacity, 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 port. 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% واجب مستمر (ED100%), withstands permanent energization without burnout. Insulation class F, حماية IP65, good tolerance to workshop dust and humidity.

خيارات الجهد: تيار مستمر 24 فولت, تيار متردد 220 فولت, تيار متردد 110 فولت. Optional LED indicator lamps, E1 explosion-proof coils for hazardous-area applications.

3. Convenient Commissioning & صيانة

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). ز / 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. القيود & ملاحظات الاختيار
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.

Selection Summary

✅ Prefer PU520-02-S: ماكينات التعبئة والتغليف, conveyor lines, 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-طريق). 5-port valves for double-acting cylinders; 3-port valves for single-acting cylinders / vacuum suction cups.

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

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

5/2-Way Solenoid Valves

5/3-Way Solenoid Valves (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, single-acting cylinders)

PU322-02-S: G1/4, الملف اللولبي واحد, مغلقة عادة

PU322-02-N-S: Normally open, 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 port, الملف اللولبي واحد, تيار مستمر 24 فولت, 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.

دليل الاختيار السريع

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-س
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