Comparison : Item # BBV50ST, 250 lb Steam Ball Valve (Female NPT x Female NPT)
Item # BBV75ST, 250 lb Steam Ball Valve (Female NPT x Female NPT)
Item # BBV100ST, 250 lb Steam Ball Valve (Female NPT x Female NPT)
Item # BBV200ST, 250 lb Steam Ball Valve (Female NPT x Female NPT)