Vacuum Breaker VB-7 series / Brass, -0,05 Bar, Screw 1/2" ~ 2"

Type : Brass, 10 Bar, Screw
Pressure : 10 Kg/Cm2
Set Pressure : -0.5 ~ 81 Kpa
Spring Options : VB-7 : A / -0.5 ~ 21 KPa
Spring Options : VB-7 : B / -21 ~ 48 KPa
Spring Options : VB-7 : C / -48 ~ 81 KPa
Size : 1/2" ~ 2"
Connection : Screw BSPT
Body : Brass
Disc : Bronze
Seat : Brass

Yoshitake VB-7 series Vacuum Breaker / Vacuum Relief Valve is installed downstream of Steam Control Valve whereby Vacuum is formed when the valve 100% close. This is due to steam becomes condensate as it losses heat. As the valve open, high pressure steam hits the condensate and creating Water Hammer. Not only that, the trapped condensate which can not be evacuated by Steam Trap could cause Corrosion.
https://www.yoshitake-inc.com/prod/product?no=379