Two-way two-port stainless steel solenoid valves, pilot-operating type, are general purpose for controlling the flow of air, water and oil. The solenoid valve is Normally Open (NO), i.e., the valve is closed when the coil is energized, and open when the coil is de-energized. This valve features high reliability and long service life for the applications such as mechanical, textile, medical, food processing and so on.
Specification
Model | 2WBK160-15 | 2WBK200-20 | 2WBK250-25 | 2WBK350-35 | 2WBK400-40 | 2WBK500-50 |
Valve Type | 2 Way 2 Position, Normally Open (N/O) |
Media | Air, Water, Oil |
Operation Mode | Pilot-operated |
Port Diammeter (mm) | 16 | 20 | 25 | 35 | 40 | 50 |
Flow Rate (Cv) | 4.8 | 7.6 | 12 | 24 | 29 | 48 |
Port Size | G1/2" | G3/4" | G1" | G1¼" | G1½" | G2" |
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, 220V AC |
Voltage Tolerance | ±10% |
Operating Temperature | -5~+85℃ (23~185℉) |
Body Material | Stainless Steel 304 |
Seal Material | NBR |
Coil Power | 20VA |
Dimensions

Model | Dimension |
Port size | A (mm) | B (mm) | C (mm) |
2WBK160-15 | G1/2" | 69 | 56 | 125 |
2WBK200-20 | G3/4" | 71 | 56 | 131 |
2WBK250-25 | G1" | 98 | 76 | 140 |
2WBK350-35 | G1¼" | 116 | 87 | 146 |
2WBK400-40 | G1½" | 122 | 94 | 158 |
2WBK500-50 | G2" | 129 | 95 | 170 |
Two-way Solenoid Valve Symbol

Tips: Why the solenoid valve doesn’t work after it is energized?
There are some possible reasons for this problem:
- Whether the power supply of solenoid valve is connected well.
- Whether the power voltage is within the working range of the solenoid valve.
- Whether the coil desoldering.
- The coil is short circuit.
- Whether the working pressure differential is proper.
- The fluid temperature is too high.
- Extraneous matters make the valve blocked.
- The liquid is too sticky, the use of solenoid valve is too frequent and the service life is up.
Aiming at the above causes, there are some suggestions listed one by one for your reference.
- Reconnect the wires and the connector assembly.
- Regulate the voltage to the right scope.
- Re-welding the coil.
- Change a new coil.
- Adjust the pressure differential or replace a new solenoid valve if necessary.
- Update an appropriate solenoid valve.
- Clean out the valve; if the seal is broken, change it.
- Change an appropriate solenoid valve.
Favorable price 2-way 2-position (2/2-way) general solenoid valve, Normally Open (NO), stainless steel body and NBR seal, suitable for air, water and oil, operating voltage 12V DC, 24V DC, 110V AC or 220V AC, various sizes of pipe connection G1/2, 3/4, 1, 1¼, 1½ and 2 inches, fast response time, high reliability and long life time.