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VUA VACUUM SWITCH

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VUA
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  • 10 €  BURSA
  • 20 ₺ İSTANBUL
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VUA VACUUM SWITCH
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SPST pressure switches come in three types:

  • With NORMALLY OPEN (NO) (SPST) electrical contacts
  • With NORMALLY CLOSED (NC) (SPST) electrical contacts
  • With (SPDT) SWITCHING contacts

Calibration is done by means of an adjustment screw that determines its load by acting as a spring. This spring opposes the pressure of the liquid on the separating element (diaphragm or piston), thus ensuring that the electrical contact closes (or opens) only when the pressure setting is reached.

  • In the NORMALLY OPEN (NO) version (Fig. 4), the contact is open, i.e. when there is no pressure, there is no current flow. When the pressure setting is reached, the electrical contact closes.
  • The picture in Fig. 5 shows a pressure switch with a NORMALLY CLOSED (NC) contact when there is no pressure. We can see that when there is no pressure, the contacts are closed and the signal is present on the external contacts. When the pressure setting is reached, the electrical contact opens and cuts off the signal.
  • In the SWITCHING CONTACT (SPDT) version (Fig. 6), the pressure of the liquid on the separating element (diaphragm or piston) causes a microswitch to switch. In this version, NC or NO contacts or both can be used.

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