SMC ITV2051-313N-X106 Electro-Pneumatic Regulator

ITV2051-313N-X106

1. ITV: Regulador electroneumático (E/P Regulator)
2. 20: ITV2000 series, medium size
3. 51: Pressure specification → 0.005～0.9 MPa (máx.. output pressure: 0.9 MPa); Suffix digit `1` = built-in digital display (Basic model ITV2050 without display; ITV2051 with display)
4. 3: Input signal type: 0～10 VDC voltage command signal
5. 1: Fuente de alimentación: 12 V CC.
6. 3: Función de salida: Switch output, Colector abierto NPN
7. norte: Hilo de puerto: NPT1/4 (American tapered pipe thread)
8. X106: SMC customer special specification

⚠️ Suffix X stands for non-standard customization, parameters not published in standard catalogs.

Official record for X106: Internal silencer removed for enhanced large-flow exhaust capacity; some batches support low-temperature operation.

Confirm exact modification requirements with SMC authorized distributor before procurement.

Direct replacement with standard ITV2051-313N is not feasible.

2. Standard Technical Specifications (Excluding X106 Custom Modification)

3. Definición de cableado (4-pin connector)
4. Marrón: DC12V +Vs
5. Blanco: 0～10V Signal Input
6. Azul: Tierra (Common ground for power & señal)
7. Negro: NPN Switch Output
8. Air Supply Requirements

Minimum supply pressure = Set output pressure + 0.1 MPa

Maximum supply pressure: 1.0 MPa

Ejemplo: Stable output of 0.7MPa → Supply air pressure ≥0.8MPa

5. Selección & Replacement Important Notes
6. X106 is non-standard custom code

Limited stock available domestically. Standard universal model ITV2051-313N without X106 features different exhaust characteristics. Direct substitution may cause pressure fluctuation risks.

2. Contact SMC distributor to obtain P.G. Hoja (Special Specification Document) to confirm exact modification details of X106.
3. Alternative reference (Only identical base hardware, excluding custom X condition):

Modelo estándar: ITV2051-313N (without X106)

For G1/4 thread: Change to ITV2051-313L-X106 (L = G thread)

6. Aplicaciones típicas

control de tensión, pressure control for coating machines, pneumatic pressure regulation for test equipment, closed-loop pressure control of stamping air cushions, gas pressure stabilization for laser equipment.

Application Scenarios of SMC ITV2051-313N-X106 Electro-Pneumatic Regulator

Resumen de características clave:

ITV2051: 0.005～0.9MPa, 12 V CC., 0～10VDC command input, NPN switch output, pantalla digital, NPT1/4 air ports

X106 custom modification: Optimized exhaust capacity, suitable for working conditions requiring rapid pressure relief and frequent dynamic pressure variation

Standard ITV2051-313N exhibits slow exhaust and delayed pressure drop; X106 is preferred for equipment requiring frequent pressure rise & rapid pressure relief.

1. Film & Web Industry (Most common application field for X106)
2. Cortadoras, Rebobinadoras, Coating Machine Tension Control

Low-friction cylinder driving press rollers to dynamically adjust contact pressure. Rapid pressure variation is required during web specification switching. The enhanced exhaust performance of X106 effectively reduces tension fluctuation.

2. Protective Film & Optical Film Laminators

Precise control of laminating pressure to avoid film wrinkling or surface damage. Multi-stage stepped pressure process requires fast pressure relief.

3. Printing Machines, Adhesive Label Die-cutters

Programmable adjustment of die-cutting pressure and feeding roller pressure.

2. 3Electrónica C & Precision Assembly Equipment
3. Precision Press-fitting Machines, Bearing Press-in, Housing Assembly

Precise control of pressing force via air pressure. Flexible pressing prevents cracking of housings and PCBs; rapid pressure relief to zero between cycles.

2. Display/Glass Inspection Jigs, Cover Plate Laminating Equipment
3. Flexible Clamping for Automatic Fixtures

Automatically adjust clamping pressure for different workpieces to avoid crushing thin components.

3. Batería de litio & Nuevos equipos energéticos
4. Electrode Calendering, Diaphragm Slitting Tension Mechanism
5. Cell Hot Pressing & Sealing Pressure Control
6. Clamping pressure for air-tightness testing fixtures

Many lithium battery equipment adopt ITV2051 with X suffix; X106 is prioritized for frequent pressure switching cycles.

4. Equipo de prueba & Testing Machines (Laboratorio & Factory Endurance Test)
5. Workpiece Leakage Test, Cyclic Pressure Endurance Test

Programmed stepped pressure rise and fast pressure relief cycles. Standard regulators limit cycle speed due to slow exhaust.

2. Pneumatic Component Test Benches, Cylinder Thrust Calibration Benches
3. Pressure Shock Simulation Test for Valves & Pipelines
4. fotovoltaica, Vaso & Semiconductor Processing
5. Glass Grinding, Wafer Polishing Pressure Control

Continuously adjustable polishing pressure enables soft contact to prevent wafer chipping; rapid pressure release during station changeover.

2. Auxiliary pressure regulation for PV module laminators
3. Industria automotriz
4. Adjustable clamping force control for welding fixtures

Automatic air pressure adjustment for different sheet materials

2. Hot-melt pressing equipment for lamps & interior parts
3. Air-tightness testing equipment for mechanical components
4. Láser & Spraying Equipment
5. Auxiliary gas pressure stabilization for small-medium laser cutting machines
6. Remote programmable adjustment of spray gun atomizing pressure on automatic coating lines

Automatically switch spraying pressure for different workpieces and coatings.

8. Goma & Plástico, Maquinaria de embalaje
9. Thermoforming, Heat-sealing pressure control
10. Sealing pressure adjustment for horizontal & vertical packaging machines

✅ Recommended working conditions for ITV2051-313N-X106 (Selection Checklist)

1. PLC needs frequent target pressure modification and requires fast pressure drop & rapid pressure relief;
2. Reciprocating cylinder operation with periodic load variation requiring quick air venting;
3. Process curve with multi-stage pressure sequence (Pressure Rise → Pressure Hold → Rapid Relief Cycle);
4. Maximum supply air pressure ≤1.0MPa, maximum process pressure ≤0.9MPa;
5. Control system provides 0～10V analog output, equipment power supply DC12V;
6. Pressure arrival / fault alarm required (Utilize built-in NPN switch output);
7. Pipeline connection with NPT1/4 American tapered thread.

❌ Not Recommended Application Conditions

1. Long-term constant pressure with rare adjustment: Standard ITV2051-313N offers better cost performance.
2. Large-volume air tanks or oversized cylinders: Upgrade to ITV3000 series.
3. Medium other than clean dry compressed air.
4. Control signal required: 4～20mA current input (This model supports only 0～10V voltage input).

Service Life of SMC ITV2051-313N-X106 Electro-Pneumatic Regulator

Nota importante: X106 only improves exhaust path structure. Main valve body and built-in micro-solenoid structure are identical to standard ITV2051-313N. Basic durability specifications remain unchanged. The modification only improves dynamic pressure relief performance without altering theoretical service life limit.

1. SMC Official Specifications
2. Durability benchmark of built-in micro solenoid valve (Core wearing component)

No fixed cycle number published in ITV2000 catalog. Reference SMC technical specification:

✅ ≥10 million pressure adjustment cycles under ideal standard conditions

Definition of one cycle: One open/close action of internal inlet / exhaust solenoid valve; Not one full reciprocation of equipment cylinder.

2. Manufacturer Warranty Policy

Warranty term: 12 months after commissioning OR 18 months after production, lo que ocurra primero.

Damage caused by air contamination, over-range operation and improper working conditions excluded.

2. Estimated Service Life under Different Industrial Conditions

Condición 1: Low-frequency operation (Long constant pressure, minor fine-tuning)

Pressure variation frequency: ≤10 times per minute

Estimated service life: 5～8 years

Equipo típico: Laser auxiliary gas stabilization, continuous constant-pressure clamping fixtures

Condición 2: Medium frequency (General automation equipment with stepped pressure switching)

Pressure variation frequency: 10～60 times per minute

Estimated service life: 3～5 years

Equipo típico: Coating machines, laminators, standard pressing machines (Main application field of ITV2051-X106)

Condición 3: High-frequency cycling (Continuous rise & rapid relief, target working condition of X106)

Frequent pressure fluctuation, continuous dynamic regulation, >60 veces por minuto

Estimated service life: 1.5～3 years

⚠️ X106 is widely adopted for high-speed pressure relief cycles. Such working conditions accelerate component wear. Spare parts stocking is recommended.

Condición 4: Ambiente áspero (Humedad, aceite, dust in compressed air, gran fluctuación de temperatura & condensación)

Service life directly reduced by 40%～70%. Precision drift, air leakage and control degradation may occur within less than 1 año.

3. Failure Sequence of Key Components
4. Rubber seal of built-in micro solenoid valve (Primary wearing part)

Recurrent opening/closing causes seal abrasion → Slow air leakage, pressure drift, delayed response.

2. Pressure sensor (Electronic component)

Long-term temperature variation and electrical surge may cause zero drift.

3. Pantalla digital (ITV2051 display version)

Brightness attenuation after long-term energization (Does not affect pneumatic regulation function).

❗ ITV series cannot be disassembled and repaired on site. Precision cannot be restored after housing disassembly. Direct valve replacement is required upon failure.

4. Maintenance Guidelines to Extend Service Life (For ITV2051-313N-X106)
5. Air supply preparation: 5μm filter + refrigerated air dryer. Liquid water and oil contamination are strictly forbidden.
6. Ambient temperature maintained 0～50℃, Prohibida la condensación..
7. Stable supply pressure ≤1.0MPa; Pressure shock prohibited.
8. Shutdown sequence: Cut off air supply → Wait for complete pressure relief → Disconnect power supply.

Long-term energization under loaded pressure accelerates internal diaphragm fatigue.

5. Avoid continuous reciprocating adjustment between limit range 0 ↔ 0.9MPa.
6. Install silencer at EXH port to prevent dust backflow into valve body.
7. Early Warning Symptoms at End of Service Life
8. Increased pressure fluctuation under fixed command signal, degraded repeatability.
9. Slow pressure leakage during pressure holding phase / Continuous air supply for compensation.
10. Noticeably slower pressure rise & drop response.
11. Occasional Err code displayed on screen.

Selection Supplement

X106 optimized large-flow exhaust for high-speed pressure cycling, yet these conditions aggravate wear. Spare part planning cycle of 2～3 years is suggested for project design.

Operating Principle of SMC ITV2051-313N-X106 Electro-Pneumatic Regulator

Core explanation: X106 only optimizes exhaust flow path for higher exhaust capacity. Fundamental control principle is identical to standard ITV2051. This device is classified as Electro-Pneumatic Regulator (E/P Regulator).

1. Internal Composition

ITV2051 integrates five core modules:

1. Control Mainboard (MCU + Signal Acquisition Circuit)
2. Inlet Micro Solenoid Valve (Normalmente cerrado)
3. Exhaust Micro Solenoid Valve (Normalmente cerrado)
4. Built-in Pressure Sensor (Detect output air pressure)
5. Main Pressure Regulating Diaphragm Chamber (Output Pressure Cavity)

Air Ports Definition:

SUP: Supply air inlet

AFUERA: Pressure output (Connect to load cylinder / air chamber)

EXH: Exhaust port (X106 version with enlarged flow channel for faster pressure relief)

Signal Interface:

0～10VDC target command input; Pressure sensor continuously samples actual OUT pressure to form closed-loop negative feedback control system.

2. Closed-loop Control Workflow

① Target Pressure Setting

PLC transmits 0～10 VDC voltage signal to ITV. Voltage corresponds to target pressure:

ITV2051 range: 0.005～0.9 MPa

0V corresponds to lower limit pressure; 10V corresponds to 0.9 MPa.

Mainboard reads target pressure value, meanwhile collects real output pressure detected by built-in sensor.

② Three Control States

1. a) Pressure Charging: Target Pressure Actual Pressure

Mainboard briefly energizes inlet solenoid valve

Compressed air flows: SUP → Inlet Valve → OUT Cavity, output pressure rises.

When pressure approaches setpoint, inlet valve operates intermittently via PWM pulse modulation to prevent overshoot.

Inlet valve closes once target pressure is reached.

1. b) Pressure Holding: Target Pressure ≈ Actual Pressure

Both inlet and exhaust solenoid valves remain closed

OUT air chamber sealed to maintain constant pressure.

Intermittent short opening of inlet valve compensates minor pipeline leakage if applicable.

1. do) Pressure Relief: Target Pressure < Actual Pressure

Mainboard briefly energizes exhaust solenoid valve

Compressed air inside OUT cavity flows: OUT → Exhaust Valve → EXH port to atmosphere.

⚠️ Custom difference of X106: Optimized exhaust channel flow area. Higher exhaust flow rate and faster pressure drop compared with standard ITV2051-313N, perfectly suited for processes requiring rapid pressure relief.

Exhaust valve closes after pressure falls to target value.

Important rule: Inlet valve and exhaust valve will never open simultaneously, preventing direct bypass from supply to exhaust and excessive air consumption. Continuous stepless pressure regulation is realized by high-frequency intermittent PWM switching.

3. Closed-loop Feedback Logic (Core Control)

External 0~10V Command → MCU receives target pressure

↓

Built-in pressure sensor samples actual OUT pressure → Feedback signal to MCU

↓

MCU compares target pressure VS actual pressure to calculate deviation

↓

PWM signal drives inlet / exhaust micro solenoid valves

↓

Adjust output pressure until deviation is minimized and balanced

This closed-loop feedback control distinguishes it from open-loop proportional valves: Output pressure remains stable against supply pressure fluctuation and load leakage, ensuring outstanding repeatability.

4. Key Principle Highlights
5. No conventional spring-balanced diaphragm structure

Traditional mechanical regulators rely on spring force balance. ITV realizes remote continuous programmable pressure adjustment via electronic control and dynamic solenoid operation.

2. Minimum controllable pressure: 0.005 MPa

Absolute zero pressure cannot be stably maintained below this threshold. Full venting requires continuous opening of exhaust valve.

3. NPN switch output function (Configuración “313” de este modelo)

Threshold pressure can be configured via onboard menu. Internal NPN transistor switches ON when output pressure reaches set range, transmitting pressure arrival signal or alarm trigger to PLC.

5. Summary of X106 Custom Difference

Electrical control logic, sensor assembly and inlet flow path remain unchanged.

Only exhaust circuit flow passage dimension optimized for higher exhaust flow capacity.

✅ Ventaja: Faster pressure drop response, rapid venting for large-volume loads.

⚠️ Disadvantage: Slightly higher instantaneous air consumption during pressure relief compared with standard model.

6. Fault Diagnosis Reference Based on Working Principle
7. Pressure cannot rise: Blocked inlet micro valve / Insufficient supply pressure
8. Pressure cannot drop: Blocked exhaust passage (X106 with larger channel reduces blocking risk)
9. Pressure oscillation & drift: Sensor aging or seal abrasion caused by moisture in compressed air
10. Unable to maintain holding pressure: Internal valve seat seal wear, inlet/exhaust valve cannot fully close