Shenhai Explosion-Proof
As per our country’s national standards, there are eight distinct explosion-proof categories: flameproof “d”, increased safety “e”, intrinsic safety “I”, pressurized “p”, oil-immersed “o”, sand-filled “q”, non-sparking “n”, and special “S” type.
| Explosion Proof Type | Gas Explosion-proof Symbol | Dust Explosion-proof Symbol |
|---|---|---|
| Intrinsically Safe Type | ia,ib,ic | ia,ib,ic,iD |
| Exm | ma,mb,mc | ma,mb,mc,mD |
| Barotropic Type | px,py,pz,pxb,pyb,pZc | p;pb,pc,pD |
| Increased Safety Type | e,eb | / |
| Flameproof Type | d,db | / |
| Oil Immersed Type | o | / |
| Sand Filled Mold | q,qb | / |
| N-type | nA,nC,nL,nR,nAc,nCc,nLc.,nRc | / |
| Special Type | S | / |
| Shell Protection Type | / | ta,tb,tc,tD |
In the realm of instrumentation, the predominant types employed are flameproof “d” and intrinsic safety “i”.