Division of 9 explosion-proof grades of explosion-proof solenoid valve

Explosion-proof solenoid valve has always used European and American strict explosion-proof grade standards, the standard explosion-proof grade has 9 major divisions, from flameproof type, increase safety type, intrinsic safety type, positive pressure type, oil filling type, sand filling type, spark free type, pouring seal type, air tightness type to air tightness, explosion proof electromagnetic valve in gas, petrochemical, metallurgical, mine, medical and other lines The industry has a very deep application.

1 flameproof D isolated ignition source Zone1, Zone2
2 increasing safety e tries to prevent ignition source Zone1, Zone2
The energy Zone0-2 of 3 intrinsic ia limit point fire source
The energy Zone1, Zone2 of the native IB limit point fire source
4 positive pressure P dangerous substances are separated from ignition sources Zone1, Zone2
5 oil filled o dangerous substances are separated from ignition sources Zone1, Zone2
6 sand filled Q dangerous substances are separated from ignition sources Zone1, Zone2
7 the spark free n tries to prevent the generating point fire source Zone2
8 pouring m to prevent ignition source Zone1, Zone2
9 airtight h tries to prevent ignition source Zone1, Zone2 explosion-proof solenoid valve.
Explosion-proof electromagnetic valve grade Description:
Ia level:
Electrical equipment that can not ignite explosive gas mixture can not ignite during normal operation, one fault and two faults.
In normal work, the safety factor is 2.
When a fault occurs, the safety factor is 1.5.
For two failures, the safety factor is 1.
Note: contact with spark must be flameproof enclosure, airtight enclosure or double safety factor.
IB level:
An electrical device that fails to ignite explosive gas mixtures during normal operation and failure.
In normal work, the safety factor is 2.
When a failure is made, the safety factor is 1.5.
For normal work, spark contacts must be protected by flameproof enclosure or airtight enclosure, and there are self indication measures for failure. The safety factor is 1 when a fault occurs.