Product Information Series 50 / Class 150 Flanged Full Port Ball Valve Class 150# Blow Out Proof Stem Locking Device Click Here for a downloadable and/or printable version of this page. SharpeŽ Valves Chicago - Headquarters (877) 774-2773 / (708) 562-9221 / Fax (708) 562-0890 E-mail info@sharpevalves.com