| INTRODUCTION | ACTUAL SET UP | COMPARISON | PROJECT SET UP |
| INSTRUCTION | CIRCUIT DETAILS | HARDWARE | CONCLUSION |
|
HARDWARE DETAILS |
7.1 SOLENIOD VALVE
A solenoid valve has two main parts: the solenoid and the valve. The solenoid converts electrical energy into mechanical energy which, in turn, opens or closes the valve mechanically.
Solenoid valves may use metal seals or rubber seals and may also have electrical interfaces to allow for easy control. A spring may be used to hold the valve opened or closed while the valve is not activates.
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Working Pressure |
Direct-acting models: 0-8 bar |
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Ambient Temperature Range |
-4 to +176°F (-20 to +80°C) except where upper limit is dictated by hazardous location certification. |
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Body Material |
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Spool Material |
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Seal Material |
nitrile.. |
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Spacer Material |
Glass filled acetal |
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Spring Material |
Stainless steel |
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Pilot Jet Material |
stainless steel |
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Pipe Threads |
NPT, BSP |
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Coil Housing |
Rated NEMA4X / IP65, materials application dependent. |
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Cable Entry |
Standard: M20 thread. Options: 1/2" NPT thread, or 1/2" NPT adapter to fit M20 thread on terminal box type coils. |
7.2 PROXIMITY SWITCH
Proximity switches open or close an electrical circuit when they make contact with or come within a certain distance of an object. Inductive proximity switches sense distance to objects by generating magnetic fields. They are similar in principle to metal detectors. A coil of wire is charged with electrical current, and an electronic circuit measures this current. If a metallic part gets close enough to the coil, the current will increase and the proximity switch will open or close accordingly. The chief disadvantage of inductive proximity switches is that they can only detect metallic objects.
Figure 7.1: Proximity Switch - Circuit Diagram
Here we have proximity switch from which the position of the piston of individual cylinder unit is found and the lube oil is injected based on the degree of sensor.
TYPE: Shielded
OPERATING DISTANCE: 4mm
OPERATING VOLTAGE: 10 -30 VDC
OUTPUT TYPE: NPN AND NO COMPLEMENTARY
