Description
G1/2 DC12V Pressure Normal Closed Plastic Solenoid Valve requires a pressure differential to function. G1/2 DC12V Pressure Normal Closed Plastic Solenoid Valve are used in applications with a sufficient pressure differential and a high desired flow rate.
G1/2 DC12V Pressure Normal Closed Plastic Solenoid Valve controls the flow of liquid and acts as a valve between high-pressure Liquid! This liquid valve would make a great addition to your robotic gardening project. There are two G1/2” (Nominal NPT) outlets. Normally, the valve is closed. When a 12V DC supply is applied to the two terminals, the valve opens and water can push through.
The valve works with the solenoid coil which operates electronically with DC 12 volt supply. As it is a normally closed assembly, it opens the flow of Liquids as soon as it is powered ON and stops/blocks the flow when the supply voltage removed.
Note: While Connecting Valve in Flow pipeline, you need to mind the Input and Output direction of the valve. It will work only if you connect it in the right direction. (Hint: Inside the value, at one side you will find the filter this is the input side of the valve)
Specification
Name:1/2” DC 12V Solenoid Valve
Material: PP plastic
Voltage: DC 12V
Current: 1A
Operation model: Indirect acting normally closed (N/C)
Pressure: about 0.02 – 0.8Mpa(Pressure)
Port size: about G1/2”
Fluid temperature: about 0-90℃
Size: Total length: 72mm
Total width: 36mm
Total height: 57mm
Thread: G1/2 “male thread
Thread length: 17mm
Fixed pitch: 25 * 25mm
WORKING PRINCIPLE OF DC12V Pressure Normal closed Plastic Solenoid Valve (DC12V Indirect Normal closed Plastic Solenoid Valve)
G1/2 DC12V Pressure Normal Closed Plastic Solenoid Valve (also called DC12V Indirect Normal closed Plastic Solenoid Valve) use the pressure differential of the medium over the valve inlet and outlet ports to open and close the valve. Therefore, they typically require a minimum pressure differential of around 0.5 bar. The working principle of an indirect acting solenoid valve can be seen in Figure 8.
The inlet and outlet ports are separated by a rubber membrane, also called diaphragm. The membrane has a small hole so that the medium can flow to the upper compartment from the inlet. For a normally closed indirect acting solenoid valve, the inlet pressure (above the membrane) and supporting spring above the membrane will ensure that the valve remains closed. The chamber above the membrane is connected by a small channel to the low-pressure port. This connection is blocked in the closed position by the plunger and valve seal. The diameter of this “pilot” orifice is larger than the diameter of the hole in the membrane. When the solenoid is energized, the pilot orifice is opened, which causes the pressure above the membrane to drop. Because of the pressure difference on both sides of the membrane, the membrane will be lifted and the medium can flow from inlet port to outlet port.
The extra pressure chamber above the membrane acts like an amplifier, so a small solenoid can still control a large flow rate. Indirect solenoid valves are only used for media flow in one direction. Indirect operated solenoid valves are used in applications with a sufficient pressure differential and a high desired flow rate.
Figure 8
