AIRTAC 2V025-08BI 24V Solenoid Valve

1. Model Explanation

2. 핵심 기술 매개변수

3. 제품특징
4. Direct-acting structure: Operates reliably with no minimum pressure differential, suitable for low-pressure and vacuum applications
5. Fast and sensitive switching: Short response time ensures efficient system operation
6. 컴팩트한 디자인: Small size, lightweight, saves installation space
7. High-quality materials: Corrosion-resistant brass body, Class B heat-resistant coil (최대. 130℃), Viton seals compatible with various media
8. Electrical connection: DIN43650A standard plug, stable connection, easy coil replacement
9. Wide application: Used in pneumatic control, fluid transfer, water treatment, lubrication systems and other industrial fields
10. 설치 & Operation Guidelines
11. Mounting orientation: Vertical mounting with coil upward is recommended; can be mounted at any angle (observe flow direction arrow)
12. Medium requirement: Use clean, impurity-free medium; filter (≤80μm) installation is recommended
13. Electrical connection: Use DIN43650A standard plug to ensure watertight sealing
14. Maintenance cycle: Inspect seals and coil condition regularly based on medium cleanliness
15. 지침: Avoid use in corrosive gas or dusty environments; special models required for special media (예를 들어. fuel gas)
16. 응용

Control of cylinders and actuators in pneumatic control systems

Auxiliary circuit control in hydraulic systems

Fluid on/off control in water treatment equipment

Fluid control in printing and packaging machinery

Lubrication system control for small equipment

Pneumatic circuit control in vacuum systems

6. 교체품 & 호환성

Same-series replacements: 2V025-08B (lead wire type), 2V025-08A (AC220V)

Other brand replacements: SMC VT307 series, FESTO direct-acting 2/2-way solenoid valves

Mounting dimensions compatible with standard 1/4″ PT threaded solenoid valves

Complete Model List of AIRTAC 2V Series (2/2-Way Solenoid Valves)

AIRTAC 2V series includes direct-acting (2V025) and pilot-operated diaphragm type (2V130/250), both normally closed.

1. 2V025 Series (Direct-acting, φ2.5mm orifice)

2V025-06 (1/8″ PT)

2V025-08 (1/4″ PT)

Voltage suffix: A=AC220V, B=DC24V, C=AC110V, E=DC12V

Electrical connection: I=DIN43650A plug (예를 들어. 2V025-08BI), no I=lead wire type

2. 2V130 Series (Pilot-operated, φ13mm orifice)

2V130-10 (3/8″ PT)

2V130-15 (1/2″ PT)

3. 2V250 Series (Pilot-operated, φ25mm orifice)

2V250-20 (3/4″ PT)

2V250-25 (1″ PT)

Cross Reference of 2V Series with Major Brands (2/2-Way Solenoid Valves)

1. Direct-acting Type (2V025 Series)

2. Pilot-operated Type (2V130/250 Series)

Selection & 교체 노트

Structure distinction: 2V025 is direct-acting (usable at 0 pressure differential); 2V130/250 are pilot-operated (require ≥0.05MPa differential)

Port compatibility: All with PT threads, directly replace same-port, same-voltage SMC/FESTO 2/2-way valves

Seal material: 2V025 uses Viton (oil/water/air resistant); 2V130/250 use NBR (better for air/water)

전압 & connection: Verify DC24V/AC220V and DIN plug/lead wire type to avoid misconnection

Working Principle of AIRTAC 2V Pilot-Operated Solenoid Valves (2V130 / 2V250)

AIRTAC 2V130 / 2V250 are pilot-operated normally closed 2/2-way solenoid valves, with a completely different principle from the direct-acting 2V025.

1. Core Structure (Pilot-operated = Small valve controls large valve)

It consists of two internal parts:

1. Pilot spool (small coil, small orifice)
2. Main spool (large diaphragm/piston, controls main flow path)

The coil only opens the pilot orifice without directly lifting the main valve seat — the main valve is opened by the pressure of the medium itself.

2. De-energized (Normally Closed)

Coil de-energized, pilot orifice closed

Pressure above diaphragm = pressure below diaphragm

Diaphragm pressed against main seat by spring + pressure

→ Main air/water path fully closed, no medium flow

3. Energized (Open)
4. Coil energized, pilot spool actuated
5. Pilot orifice opens
6. Pressure above diaphragm releases rapidly
7. Pressure below diaphragm > pressure above diaphragm
8. Diaphragm lifted by pressure differential

→ Main flow path opens, large medium flow passes through

4. 주요 특징 (vs Direct-acting 2V025)
5. Minimum operating pressure required

Pilot-operated valves typically need ≥0.05MPa differential to open; cannot operate at low/zero pressure

2. High flow, compact size

Much higher flow than direct-acting valves in the same body size

3. Low coil power, 긴 서비스 수명

Coil only opens small orifice, lower heat generation, longer lifespan

4. Unidirectional flow only

Flow arrow marked on body; reverse mounting prohibited (may cause incomplete closing or failure to open)

5. Summary of Principle

AIRTAC 2V Pilot-Operated Solenoid Valve:

Coil opens pilot vent → Pressure differential forms across diaphragm → Main valve lifted for high-flow on/off control.