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• Quarter turn non-rubbing design is achieved by triple offset geometry, completely eliminating all seat to seal rubbing throughout the 90 degree rotation of the disc.
• Metal seat results in broader application, longer valve life and less maintenance.
• Internally and externally retained, triple blow-out prevention.
• The seat seal ring can be changed easily.
• Metal seal, resilient metal seal and soft seal are optional.
• Single-piece cast body, with face to face dimensions in accordance to ISO 5752 and API 609 provides interchangeability with gate, high performance butterfly, plug and other valves for simpler and more flexible installation.
• Valve constructions allow material compatibility with NACE MR0175-2003, please contact Rasta Group for details.
• High performance GF TFE packing and graphite packing with live-loading to fit with low fugitive emissions APl-622.
Products
Series BS9000
Rasta Group BS9000 Straight Through Ball Valves have a special inner valve which can be fully opened or closed by simply causing the stem to make a 1/4 turn. The offtake from a ball valve, when totally opened,has the same bore as the pipeline and its fluid resistance is negligible. For this reason, this atuomatic valve is best suited to on-off service, controlling various types of liquid, gas and slurry.
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