Normally Closed Air Solenoid Valve

 

2W	025	08	AC110V
Specification Code	Orifice Size	Port Size	Standard Voltage
2W: 2-Port 2-Position Solenoid Valve (Normally Closed)	025:2.5mm	06:G1/8	DC12V
	040:4mm	08:G1/4	DC24V
	160:16mm	10:G3/8	AC24V 50/60Hz
	200:20mm	15:G1/2	AC110V 50/60Hz
	250:25mm	20:G3/4	AC220V 50/60Hz
	350:35mm	25:G1	AC380V 50/60Hz
	400:40mm	35:G1 1/4
	500:50mm	40:G1 1/2
		50:G2

 

Available in eight sizes (models: 2W025-08 to 2W500-50) with flow apertures from 2.5mm to 50mm. Designed for air and water media (viscosity ≤20CST), these units feature brass bodies and nitrile rubber seals. Pressure ranges vary:

Direct-acting models: 0-0.7MPa (air/water)

Internally piloted versions: 0.1-0.5MPa (water), 0.1-0.7MPa (air)

All units withstand 1.0MPa maximum pressure and operate between -5°C to 82°C. Threaded connections range from G1/4 to G2.

 

Model		2W025-08	2W040-10	2W160-15	2W200-20	2W250-25	2W350-35	2W400-40	2W500-50
Working fluid		Air, water, oil
Action type		Direct-acting		Internally piloted
Type		Normally closed
Orifice diameter (mm)		2.5	4.0	16	20	25	35	40	50
Cv value		0.23	0.60	4.8	7.6	12	24	29	48
Port size		G1/4	G3/8	G1/2	G3/4	G1	G1 1/4	G1 1/2	G2
Applicable fluid viscosity		≤20CST
Operating pressure range		Direct-acting: 0–0.7 MPa (Water and oil: 0.1–0.5 MPa; Air: 0.1–0.7 MPa)
Max. proof pressure		1.0MPa
Fluid and ambient temperature		-5~85°C
Operating voltage range		±10%
Main component materials	Body	Brass
	Seal	Nitrile rubber
Coil power		15VA	20VA				50VA
Mounting method		Horizontal mounting

 

 

• Features pure copper coils (not brass) for 15-20% reduced power consumption. Compatible with AC/DC voltages (±10% tolerance) with power requirements spanning 15VA to 50VA. Continuous operation capability (up to 15 days with energy-saving module) exceeds standard water valve limitations.
• Full brass valve body with reliable sealing, compatible with water, air and hydraulic oil. Complete size range with flow orifice from 2.5mm to 50mm: direct acting for small bore low pressure, pilot type for large bore high pressure. Multiple coil voltages including DC12V/24V, AC24V/110V/220V/380V. Standard normally closed design automatically cuts off fluid when power off for safe operation. Universal thread ports, direct replacement without pipeline modification for easy installation.

 

 

• Orientation: Must mount horizontally with coil vertical
• Directional Flow: Arrow indicates media direction - reversal causes malfunction
• Filtration: Mandatory 40μm pre-filtering for unclean media
• Voltage Matching: Essential for proper actuation (e.g., AC220V supply requires AC220V unit)
• Electrical Connections: Secure terminal contacts prevent operational failure

 

 

• Fail-Safe Design: Automatically closes during power interruption
• Rapid Response: Immediate sealing upon de-energization
• Low Maintenance: Resists clogging with proper filtration
• Dual-Media Adaptability: Handles compressed air and water systems

 

 

Install filter upstream to prevent dirt from jamming internal spool; mount valve horizontally upright, inverted installation is forbidden. Do not energize coil continuously for long hours to avoid overheating burnout. Clean pipeline impurities before long shutdown to extend seal service life. Disassemble and clean the spool if leakage occurs after valve closes.

 

 

Water Systems

• Irrigation control
• Cooling circuit shut-off
• Potable water distribution
• Boiler feed lines

 

Pneumatic Systems

• Machinery safety interlocks
• Compressed air dump valves
• Tooling isolation

 

 

The brass construction provides superior corrosion resistance versus aluminum alternatives, particularly in wet environments. Pure copper windings extend service life while reducing heat generation. Horizontal mounting prevents core misalignment and seal wear. For water services, the energy-saving module enables extended operation without coil burnout - a critical advantage in continuous processes. Compact G1/4 and G3/8 models suit equipment retrofit applications where space constraints exist.

 

 

Units meet international standards for:

• Leak prevention in closed position
• Pressure containment at 1.5× working pressure
• Electrical insulation for wet environments
• Temperature resilience in unregulated spaces

 

These characteristics make this product family particularly valuable for food processing plants, mobile equipment, and manufacturing facilities requiring dependable emergency shut-off capabilities across multiple fluid types.

 

Model	A	B	C	D	K
2W160-10	93	55.5	106.5	67.5	G3/8
2W160-15	93	55.5	106.5	67.5	G1/2
2W200-20	97	55.5	113	73	G3/4
2W250-25	102.5	72.5	121	94	G1
2W350-35	134.5	92.5	159	120	G1 1/4
2W400-40	137.5	92.5	165	122	G1 1/2
2W500-50	151.5	110	188	170	G2

Q1: What fluid can 2W solenoid valve control?

A1: Air, clean water and light hydraulic oil. Not fit corrosive liquid without customized seals.

 

Q2: What's the difference between direct acting and pilot type?

A2: Small sizes (2W025/040) adopt direct acting for low pressure; large sizes from 2W160 use pilot design to support higher working pressure.

Q3: Is this valve normally open or closed?

A3: Standard 2W series is normally closed, fluid cuts off when power is off.

Q4: What coil voltages do you have?

A4: DC12V, DC24V, AC24V, AC110V, AC220V, AC380V are all in stock.

 

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