SCREWED-IN BONNET SOLID WEDGE DISC
NON-RISING STEM INTEGRAL SEAT ASBESTOS FREE
THREADED TO BS 21 (ISO 7) / ASME B1.20.1
SIZE RANGE : 15mm (1/2″) ~ 100mm (4″)
Caution on Brass Products:
Corrosion (corrosion cracking or indemnification) may occur on Brass material. The risk of
stress corrosion cracking is considered high in the case of great tension (stress on screw
part generated from pipe side) coupled with application in a corrosive environment (an
environment where chemical such as Ammonia, Nitrite Acid, etc is present. Ammonia might
be contained in glass wool, etc. used in heat insulator).
To prevent stress corrosion cracking problem, careful and proper installation of pipe and
valve is necessary – avoid excessive fastening or screw of pipe tensile stress on valve.
Use of Bronze valve instead of Brass valve for underground application or application in
corrosive environment is recommended.