111 - 9916 KDRDE5K - 31 40E30 Hydraulic Pump Solenoid Valve

 
111 - 9916 KDRDE5K - 31 / 40E30 Excavator Hydraulic Pump Solenoid Valve
 
 
Specifiion
 

 
 
Description
 
Hydraulic solenoid valves are used to electrically direct hydraulic fluid to and from an actuator by shifting a spool or poppet within the valve. These valves can be 2-, 3-, 4-, or even 5-way valves shifted by either one or two electronic coils.
Solenoid valves are control units which, when electrically energized or de-energized, either shut off or allow fluid flow. The actuator takes the form of an electromagnet. When energized, a magnetic field builds up which pulls a plunger or pivoted armature against the action of a spring. When de-energized, the plunger or pivoted armature is returned to its original position by the spring action.
 
Characteristic
 
1. A two-way valve only has two ports, whereas more advanced designs may have three or more, depending on what it will be used for.
2.All solenoid valves, no matter the design, are specified to be one of two general types: either a direct-acting valve or a pilot operated valve.
3.In a direct-acting solenoid valve, a coil magnetically opens the valve in direct action, lifting the shaft and the seat of the valve without depending on outside pressure.
4.In pilotoperated valves, the solenoid activates a much smaller "pilot" valve that in turn opens up a larger valve operating at much higher pressure, such as required in hydraulics, steam, etc., or at a greater volume flow, as for releasing large quantities of liquids, gases, steam, or air.
5.Although piloted valves require less electrical energy to operate, they usually need to maintain full power in order to remain in an open state, and they perform at a slower rate than direct-acting solenoids. Direct-acting solenoid valves only need full power when opening the valve, as they can hold their open position even when operating on low power.
 
 
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