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    Solenoid Valve, 2 Way, Normally Closed, 12V/24V/220V for air water oil

    4.8 out of 5 based on 7 reviews | Write a review
    Low price 2/2-way normally closed solenoid valve, 2-way 2-position (N/C), has different port sizes 1/4", 3/8", 1/2", 3/4" to 2", and operating voltages DC 12V, DC 24V, AC 110V or AC 220V for options. Valve body is made of brass and sealing material is NBR, general-purpose solenoid valve for control the flow of air, water and oil with good medium compatibility, high reliability and long service life.
    Free Shipping Worldwide
    Delivery date: 6-12 days

    Two-port (2/2-way) Normally Closed brass electric solenoid valves are general purpose for controlling flow of air, water and oil with DC 12 Volt, DC 24 Volt, AC 110 Volt, AC 220 Volt. The NC valve is open when the solenoid is energized and it is closed when de-energized. It is widely used in the areas like mechanical, textile, medical, food processing and so on.


    Model 2W025-08 2W040-10 2W160-15 2W200-20 2W250-25 2W350-35 2W400-40 2W500-50
    Valve Type 2 Way 2 Position, Normally Closed (N/C)
    Media Air, Water, Oil
    Operation Mode Direct-acting Pilot-operated
    Port Diameter (mm) 2.5 4.0 16 20 25 35 40 50
    Flow Rate (Cv) 0.23 0.6 4.8 7.6 12 24 29 48
    Port Size G1/4" or 1/4" NPT G3/8" or 3/8" NPT G1/2" or 1/2" NPT G3/4" or 3/4" NPT G1" or 1" NPT G1¼" or 1¼" NPT G1½" or 1½" NPT G2" or 2" NPT
    Fluid Viscosity Under 20 CS
    Operating Pressure Water, Oil: 0~0.5MPa (0~72PSI) Air: 0~0.7MPa (0~101PSI)
    Max. Pressure Resistance 1.0MPa
    Voltage(Optional) 12V DC, 24V DC, 110V AC, 220V AC
    Voltage Tolerance ±10%
    Operating Temperature -5~+85℃ (23~185℉)
    Body Material Brass
    Seal Material NBR
    Coil Power 15VA 20VA 50VA
    Weight 0.4kg 0.6kg 0.9kg 0.9kg 1.3kg 2.5kg 2.8kg 4.6kg


    2-Way 1/4-3/8 inch Solenoid Valve Normally Cosed Dimensions

    2-Way 1/2-2 inch Solenoid Valve Normally Cosed Dimensions

    Model Dimensions
    A (mm) B (mm) C (mm) D (mm) K (inch)
    2W160-15 93 55.5 106.5 67.5 1/2
    2W200-20 97 55.5 113 73 3/4
    2W250-25 102.5 72.5 121 94 1
    2W350-35 134.5 92.5 159 120
    2W400-40 137.5 92.5 165 122
    2W500-50 151.5 123 188 170 2

    Two-way Solenoid Valve Symbol
    2-Way Solenoid Valve Symbol


    1. High quality copper coil, corrosion resistance and good stability.
    2. Solid and thick solenoid valve with smooth surface.
    3. Diaphragm structure, general purpose for air and water, reliable operation.
    4. Clear water flow direction mark, convenient to install.
    2-Way Water Solenoid Valve Features

    Water Solenoid Valve Applications

    2 Way Water Solenoid Valve Applications

    Tips: Direct-acting vs pilot-operated solenoid valve

    The ATO-2W series solenoid valves have two valve types, direct-acting with port size G1/4”, 3/8” and pilot-operated with port size G1/2, 3/4 inch etc. Are there any differences between them?

    1. The direct-acting solenoid valve is usually used in small caliber and low pressure environment while the pilot-operated solenoid valve is suitable for large caliber and high pressure occasion. Generally, the flow rate of pilot-operated solenoid valves is larger than that of direct-acting solenoid valves.

    2. For direct-acting solenoid valve, it will be able to start in zero pressure, without need of the minimum pressure of the medium. However, the pilot-operated solenoid valve needs a minimum pressure when starting, normally it is 0.05Mpa.

    3. In terms of the start-up speed, the direct-acting solenoid valve is faster compared with the pilot-operated one.

    4. The power consumption of direct-acting solenoid valve is usually ranging from 5W to 20W. But the pilot-operated solenoid valve has lower power consumption.

    Existing reviews of Solenoid Valve, 2 Way, Normally Closed, 12V/24V/220V for air water oil
    This water solenoid valve works well...
    This water solenoid valve works well with 24V DC on an auto water-fill system. The port size G1/2 inch is really what I needed. There is no problem for installation. It doesn't leak for now.
    From: Jamie | Date: 28/05/2018
    Was this review helpful? Yes No (0/0)
    I bought the 12V 1/4 solenoid valve and it works very well.
    I bought the 12V 1/4 solenoid valve and it works very well. Before that, I bought a plastic one that stopped working just for one day. This one is solid and well-built and it has worked perfectly all summer. Worth the money.
    From: Anderson F | Date: 01/11/2018
    Was this review helpful? Yes No (0/0)
    Great solenoid valve
    The solenoid valve I bought is normally closed model and the port size is 1/4". Worked wonderful and was easy to install. Very pleased with this product.
    From: Ravi | Date: 22/11/2018
    Was this review helpful? Yes No (0/0)
    This 24v solenoid valve was very good and solid.
    This 24v solenoid valve was very good and solid. Great replacement for the solenoid valve that the water was not shut off on my house humidifier. Works great for several weeks now after super easy installation.
    From: Gary W. | Date: 29/07/2019
    Was this review helpful? Yes No (0/0)
    Bought a 24v G1/2" solenoid valve
    This solenoid valve is exactly what I needed and use it to switch on and off my sprinkler system. It was very easy to install. The price is somewhat high but it's worth it. Well built and works great so far.
    From: Mark | Date: 07/08/2019
    Was this review helpful? Yes No (0/0)
    Polarity of wires on the 24v model
    For the 24v solenoid valve, which wires are positive and negative?
    From: Brian | Date: 19/11/2019
    Was this review helpful? Yes No (0/0)
    ATO Responded
    It doesn't matter. The valve works either way.
    Great valve
    The solenoid valve looks very heavy duty, and I love it that can be powered with 110V. Doesn’t leak and works as expected. Good valve for money.
    From: Brendan | Date: 06/01/2021
    Was this review helpful? Yes No (0/0)
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