KWE5K-20/G24Y05 solenoid valve is suitable for excavator DH820 proportional solenoid valve excavator accessories

  Ordinary electromagnet is a switching quantity, it is not open or off, the opening is the smallest

when it is off, the opening is the largest when it is open, and there is no way to adjust: the proportional

electromagnet is to determine the size of the valve opening according to the size of the given current,

which is a continuous process. The difference between proportional electromagnet and ordinary

electromagnet is that the proportional electromagnet is an ordinary electromagnet plus a spring,

which can make the output force of the proportional electromagnet proportional to the current,

and has nothing to do with displacement, so the proportional electromagnet must have horizontal

suction characteristics, that is, in the working area, the size of its output force is only related to the

current, and has nothing to do with the armature displacement. If the attraction of the electromagnet

does not show horizontal characteristics, the spring curve and the electromagnetic force curve family

have only a limited number of points of intersection, which means that effective displacement control

cannot be carried out. In the working range, the corresponding current of each electromagnetic force

curve that does not intersect the spring curve is below the spring curve, which will not cause the armature

displacement; Above the spring curve, if such a current is output, the electromagnetic force will exceed

the spring force, pulling the armature until the limit position. On the contrary, if the electromagnet has

horizontal characteristics, then under the same spring curve, there will be many points of intersection

with the family of electromagnetic force curves. At these intersection points, the spring force is equal

to the electromagnetic force, that is, when the input current is gradually increased, the armature can

continuously stay in each position.