Two-way three-way direct-acting solenoid valve features description

Two-position three-way direct-acting solenoid valves (eg models 6012 and 6014) have three ports and two seats, one of which is always open or closed.
The function of the valve depends on how the interface is connected to the fluid system. For the normally closed type, the interface P (see Figure 2) is connected to the pressurized fluid; the interface A is the outlet; the interface R is the return or exhaust. When the power is off, the conical spring pushes the armature (plunger) toward the valve seat 1 and seals the interface P. At this time, interface A is connected to interface R. After energization, the armature is lifted under the action of the magnetic force, so that the valve seat 2 and the interface R are sealed. When the plunger moves up, the valve seat 1 is opened and the fluid can flow from P to A. For the normally open type, the interface R is normally closed.
Features:
■ For normally closed type, the flow direction is below seat 1.
■ For normally open type, the inlet is on the upper seat
■ Maximum pressure is related to spring force and rated diameter (regardless of coil power consumption)
■ Normally closed spring force is large; normally open spring force is small
■ For the normally closed type, the working pressure depends on the force generated by the conical spring and is independent of the magnetic force of the coil.