Solenoid valves control the flow rate of fluid and gases in systems, devices, and motors. These control valves that are uniquely distinctive and have varying types evidently have carried out simple to complex tasks without difficulty. These can be made particularly to match specialized needs and used to control liquids, gases, oils, electricity, among other mediums from low to high temperatures. These valves have been useful to various systems, control cylinders, motors, and other industrial valves acting on more than a few fundamental and multifaceted applications. They have highly developed designs where in some make use of a manifold-type design concept.
Direct Acting Valve
The force of the coil opens the valve port by taking the pin from the base of the valve. Direct acting solenoid valve relies on the level of current in the coil to work. This valve opens and closes notwithstanding the flow and pressure provided that the available maximum pressure is not surpassed.
This valve includes a pilot and main valve seats with orifices and a main valve diaphragm with restraining orifice. The top portion of the valve is comprised of the pilot seat with corresponding orifice. The pilot orifice is opened and closed by the plunger. The inletline pressure causes to open and close the valve seal and goes through the pilot orifice. The pilot-operated valve always necessitates full power both to open and to be kept open.
Two Way Valve
This valve has an inlet and an outlet to facilitate liquid flow and shutting it off. The two way solenoid valve operations are referred to as ‘normally open’ and ‘normally closed’. The inlet pipe should have greater pressure compared to the outlet in order to force the fluid through the two way valve. Equal pressure of the two pipes will not facilitate the flow of fluid.
Three Way Valve
This valve has three ports and two orifices, one of which is open while the other orifice stays closed. The three way solenoid valve interchangeably applies as well as exhausts pressure and is indicated to be normally closed, normally open, or universal.
Four Way Valve
It has at least four pipe connection ports wherein a pressure inlet pipe and two cylinder ports apply pressure to an actuator or double-acting cylinder. A remaining outlet or two exhaust pressure from the cylinders. Type of fluid, temperature, pressure, and flow rate of the system, the type of material used for the seals, and compatibility with components of other system are vital aspects to be taken into account prior to purchasing a four way solenoid valve.
From these specifications, it is evident that the solenoid valve is dependent on a differential of pressure between input and output. Apparently, the pressure at the input should at all times be higher in comparison to the pressure at the output in order for the valve to operate effectively. At any rate that the pressure at the output goes beyond the pressure at the input, the control valve will open despite whatever is the condition of the solenoid valve. Look at parts of solenoid valve to know more about structure of a solenoid valve.