Emergency Vent Manhole Cover

Emergency Vent Manhole Cover :

1.Manufacture standard:GB5908-86.

2.End type:Flange/Thread.

3.End standard:HG,GB,SH,HGJ,JB,ANSI,JIS.

4.Operating pressure:200mmH2O～1500mmH2O.

5.Materials of construction：

Component

Body

Stem Guide

Pressure Disk

Pressure Seat

Coating

Material

Steel

Aluminums

Casting

304

316

316L

PTFE

304

316

316L

PTFE

304

316

316L

PTFE

304

316

316L

PTFE

6.Dimension table：

7.Drawing of emergency vent manhole cover

Emergency Vent Manhole Cover

OrderConstruction：

Please give clear indication of Dimension operating pressure and material.

Please give clear indication of flange, material and operating pressure if you need other standard.

Breather Valve