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Electromagnetic Reversing Valve

Ⅰ . Overview It applies to motor driven terminal type centralized lubricating system. The electric control cabinet receives the signal sent out by type PV-2E pressure control valve so as to realize alternate grease supply and opening of two main grease supply pipelines. Cylinder-shaped sliding...

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image002.jpg . Overview
 It applies to motor driven terminal type  centralized lubricating system. The electric control cabinet receives the  signal sent out by type PV-2E pressure control valve so as to realize alternate  grease supply and opening of two main grease supply pipelines.
 Cylinder-shaped sliding valve structure is  employed to keep tight opening and closing of valve mouth thus realizing  long-time high pressure without leakage. Powerful electromagnet and spring is  employed to buffer, thus ensuring reliable reversal.


. Technical parameters


       Model

Nominal pressure (MPa)

Maximum flow (L/min)

Number of pathway

pressure at grease    returning port (MPa)

Maximum Switching    frequency (cycle/min)

Environment    temperature (℃)

Spring type

Weight (kg)

34DF-L2

20

3

4

10

30

0-50

counterbalance spring

17

23DF-L1

3

10


.  Use instructionblob.png
The  cone penetration of used lubricating grease is 310-385 (NLG10#~1#).
It can  be used directly when the pressure in the grease conservator (pressure at  grease returning port) is under 3Mpa. External grease discharge way should be  taken when the pressure is between 3~10Mpa.

 

 

 







.  Working principle
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 The diagram shows the  ending status of grease supply. Electromagnets a and b of  electromagnetic valve are powered off for demagnetization. The entrance of  pressure grease is closed.  Lubricating  pump stops working. In this state, two main grease supply pipelines are opened  to grease conservator.


 Location  S-2


 At  the same time of pump starting, electromagnet a is powered on for magnetization. The grease output from pump is  delivered to main grease supply pipeline L1 through Mouth A and main grease supply pipeline L2 is still opened to grease  conservator.

Location P-1


 Pressure  control valve is installed on the end of main grease supply pipeline. When the  pressure on the end of main pipeline L1 is higher than the set pressure of pressure  control valve, it is suggested to push its sliding valve rightward.

Location P-2


 When  the sliding valve moves rightward, push the contact linked to it to the left,  making the travel switch LS-1 in the state of being power on which will send a  signal to electric control cabinet. Therefore, electromagnet a is powered off and the pump stops  working which returns to location S-1.
In next time of grease feeding, electromagnet b is powered on. The grease output from  pump is delivered to main grease supply pipeline L2 through Mouth B. The act of pressure control valve  makes travel switch in the state of being off.

. Descriptions of model

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. Dimensions

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