Ball valve 球阀 THE BALON BALL VALVE TOTALLY ADVANCED Balon has eliminated the need for grease fittings, lube channels, and regular lubrication, versus other designs. UNIQUE SEALING APPROACH The Multi-Seal seat design has given impetus to the development of an overall valve which embodies several design improvements. BACKSEATED STEM Stems are backseated and therefore blowout proof. And they provide metal-to-metal backup sealing in the event of a fire. This secondary metal-to-metal sealing is also provided internally behind the seat area SIMPLIFIED TOP WORKS Bolts and glands and complicated stem assemblies are totally absent in the Balon valve to assure a simpler, more trouble-free valve. Hazards associated with bolted stem retainers and packing adjustment screws or bolts have been eliminated. Even the stops are internal and give dual precise stopping support during opening or closing. The stem area is grease-packed and protected by a plastic weather guard to shield the vital area from external elements.