Electric valve lines are marked with vc, VO, ZC, ZO, etc. What do these mean? And passive nodes,

VC: valve closing (control line), V is the abbreviation of "valve", which means valve, and C is the abbreviation of "closing", which means closing.

VO: The valve is open (control line), and O is the abbreviation of "open", which means open.

ZC: valve closing feedback signal and valve state feedback line.

ZO: valve opening feedback signal and valve state feedback line.

Passive contacts, dry contacts: electrical switch contacts, relay contacts, etc. Contacts in the switch state are directly formed by conductors;

Active contact: the contact that indicates the on state through the output level;

Common point: the reference point of the circuit, such as the electrical zero line and the "ground" of the control circuit.

Extended data:

Daily maintenance of electric valve

1, the electric valve should be stored in a dry and ventilated room, and both ends of the channel should be blocked.

2, long-term storage of electric valve should be regularly checked, remove dirt, and coated with antirust oil on the processing surface.

3, after installation, should be checked regularly, the main inspection items:

A, sealing surface wear.

B, valve stem and valve stem nut trapezoidal thread wear.

C. Whether the package has expired, and if it is damaged, it should be replaced in time.

D, electric valve maintenance after assembly, sealing performance test should be carried out.

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