VB100 & VB100SS open at 1-2 kPa vacuum (Gravity draining systems).
VB100U & VB100USS open at 35 kPa vacuum (Pump systems).
Orifice equal to 6mm dia hole.
Spring loaded poppet opens at a set pressure to allow air into the high section of the system and removing any vacuum that may ‘hang-up’ a liquid column.
Into ½" BSP and NPT female socket.
Ensure the poppet head is level with the inner end of the socket thread inside the pipe when fitted, in order to maximise flow area.
-Brass body, polyurethane cap, stainless steel spring.
-Poppet is acetal in VB100, stainless steel in VB100U.
-Seal is Viton A standard (coloured red).
-VB100SS & VB100USS have a stainless steel body.