Hydraulic Exchange - Valves - Pumps - Motors - Filters. Visit the Resources Tab on our Home Page for a link to Eaton (Vickers) where you will find data sheets and repair manuals. Vickers Hydraulic Motor(Vickers M2U Motor Series) Vickers Hydraulic Motor(Vickers MHT Motor Series). A single proportional solenoid valve can replace several conventional valves in a control system. Deceleration valve, acceleration valve, flow controls and solenoid switching valve functions are all packaged in one proportional valve envelope. Smaller manifolds and fewer hydraulic interconnecting lines are needed. Remote electric.

Production is shut down! Oil has leaked everywhere. Management is screaming to get the line going again.

You hit the GO button and nothing moves. You’ve done some troubleshooting; you’ve got power, you’ve got a functional hydraulic system.

Everything is working except for one function. All these signs tell you that a hydraulic valve is the culprit.

You race to the stock room and grab a replacement. It bolts up to the same place, works on the same voltage, plugs back in without any new wiring, and it seems everything is resolved. But, when you power up the machine, one of the motions moves in when it is supposed to move out. A conveyor turns off when it is supposed to turn on.

Downtime is extended. The machine is possibly damaged.

Or worst case, at rest, a heavy device begins to change position when it is supposed to be held in place. What went wrong? A directional valve with the same size body – same size ports – same electrical connections – can do a variety of different functions and all you need to do is change the spool! Externally, the valve will look exactly the same but internally the flow paths may be completely different. They all look the same but they are not! Great care must be taken when grabbing a valve off the shelf! Example Exercise Referring to the chart above, let’s start with a basic valve body.

This valve below has a solenoid on one end and a spring on the opposite end. Now we are going to insert the spool into the body. This is an Eaton-Vickers #2 Spool.

By combining the two Pictures, we get a full valve operation. Combined valve operation. Shown here, the valve is in its non-energized position. The Spring is in control.

Pressure comes in the P port (if that is how the system is piped) and out to B port. The A work port is flowing to the Tank or Return. When the Solenoid is energized, the valve shifts to opposite position (see below). The Pressure now goes straight up to the A work Port. The B work port now goes to Tank.

The middle position can either be a third position or not utilized. If not utilized, the middle position becomes a transition. When utilized, the middle position can hold a device in position or release the pressure on a device. Combined valve operation when power is applied.