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Emergency Vent Cover
For your safety, choose our products.
Emergency Vent Cover For your safety, choose our products.
Emergency Vent Cover (Emergency Presure and Vacuum Relief Valve)
The SEWON emergency vent cover is designed to provide emergency relief capacity beyond that furnished by the normal operating pressure & vacuum
relief valve on the tank.
These large relief cover which only open in emergencies are used to protect tanks against rupture or explosion that could result from thermal pressure
caused by fire surrounding a tank, etc.
It remains closed tightly at all internal pressure below setting pressure (and above the vacuum setting). These cover also provide easy access into the tank.
|Size range||18", 20" and 24"|
|Standard connection||API roof manhole drilled flange to match API 650, or ANSI 150LB|
|Standard material||Stainless steel body & Stainless steel cover
Aluminum body & Stainless steel cover
Carbon steel body & Stainless steel cover
|Max. working pressure||according to API 2000|
|Setting pressure||according to API 2000|
Emergency Vent Model Code
How to order
|MODEL||INLET SIZE||MATERIALS||FLANGE DRILLING||OPTION|
Body / Pallet
16 : 16"
18 : 18"
20 : 20"
24 : 24"
SS : Special
C : Carbon Steel
4 : 304 S.S
5 : 304L S.S
6 : 316 S.S
7 : 316L S.S
A : Aluminum
S : Special Material
PO : API 650 12th Edition
PN : API 650 12th Edition
AR : ANSI Class 150 RF
AF : ANSI Class 150 FF
KR : KS/JIS 10K RF
KF : KS/JIS 10K FF
5F : KS/JIS 5K FF
5R : KS/JIS 5K RF
NO : NO Drilling
SS : Special
O : No Option
4 : 304SS weight
6 : 316SS weight
S : Special
Means a 24" model SEA emergency vent with carbon steel body, 304 S.S pallet,
12th flange drilling and no other option.