Germany ewo-stuttgart valves ewo-stuttgart models ewo-stuttgart prices

ewo-stuttgart valves are directional control valves with more than two flow patterns and more than two oil ports. They are valves that realize the communication, cutoff, and reversal of hydraulic oil flow, as well as pressure unloading and sequential action control. Directional control valves rely on the relative motion between the spool and the valve body. There are two types: rotary valve type and slide valve type. They are classified into two-position, three-position, etc., according to the number of working positions where the spool stays within the valve body; they are classified into two-way, three-way, four-way, and six-way, etc., according to the number of oil circuits connected to the valve body; the methods for operating spool movement include manual, mechanical, electric, hydraulic, electro-hydraulic, and other types.

ewo-stuttgart valve working principle

The six-way reversing valve is mainly composed of the valve body, sealing components, cam, valve stem, handle, and valve cover (Figure 1). The valve is driven by the handle, which rotates the valve stem and cam. The cam has the functions of positioning drive and locking the opening and closing of the sealing components. When the handle is rotated counterclockwise, the two sets of sealing components close the two lower channels under the action of the cam, while the two upper channels are connected to the inlet of the piping device. Conversely, the two upper channels are closed, and the two lower channels are connected to the inlet of the piping device, achieving reversal without stopping.

ewo-stuttgart valve advantages

Accurate action, high degree of automation, stable and reliable operation, but it requires additional drive and cooling systems, and the structure is relatively complex; the disc-type structure is simpler and is mostly used in production processes with smaller flow rates. In industries such as petroleum, chemical, mining, and metallurgy, the six-way reversing valve is an important fluid reversal equipment. This valve is installed in the pipelines of thin-oil lubrication systems that transport lubricating oil. By changing the relative position of the sealing components in the valve body, the various channels of the valve body are connected or disconnected, thereby controlling the reversal and start-stop of the fluid.

ewo-stuttgart valve functions and applications

Reversing valves, also known as Chris valves, are a type of valve with multi-directional adjustable channels that can change the fluid flow direction in a timely manner. They can be divided into manual reversing valves, solenoid reversing valves, electro-hydraulic reversing valves, etc. During operation, the drive shaft outside the valve is rotated via the external drive transmission mechanism, driving the rocker arm to activate the valve plate, so that the working fluid sometimes flows from the left inlet to the lower outlet of the valve, and sometimes changes from the right inlet to the lower outlet, achieving the purpose of periodic flow direction change. This type of reversing valve is widely used in petroleum and chemical production, and is most commonly used in synthetic ammonia gas making systems. In addition, reversing valves can also be made with a disc-type structure, mostly used for occasions with smaller flow rates. During operation, it is only necessary to turn the handwheel to change the flow direction of the working fluid through the valve disc.

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