ball valves ans gate valves 1

[boulfiza]

hi
is there someone who can tell me why we use gate valve in hot taping.in other words what is the defference between ball and gate valve. thanks

 

[Eyadbdc]

Dear boulfiza,
The only difference that in case of Gate valve you can open the valve gradually and you can use it as partly opened valve but in case of ball valve you can open it with quarter turn (90°) – it may cause Water Hummer -, Ball valve its not recommended to use as partly opened valve.
Both Gate And Ball valves are under Quick opening category.
I hope this will clarify the difference.
Regards
eyadbdc@yahoo.com

 

[11echo]

The reason we use gates valves before ball valves is expense! When you're getting above 4", ball valves start to get more pricey then gate valves, especially in a full port configuration. Good Luck! ...Mark

 

[boulfiza]

thankfor your preciouse help
boulfiza

 

[boulfiza]

thank for your preciouse help
boulfiza