The outstanding performance of triple offset, （三重抵消的出色表现,）.PDF

Series 30,000 Rotary Process Valve The outstanding performance of triple offset, metal seated Vanessa Series 30,000 valve is the ideal !@#$ valves controls solution to achieve perfect shutoff in any process. Features • Torque generated elastic metal seal provides zero leakage performance, as from API 598 and API 6D. • Torque-seating action ensures continuous bi-directional, zero leakage performance. • Quarter turn non-rubbing design is achieved by a unique, triple offset geometry, completely eliminating all seat to seal rubbing throughout the valves 90 degrees rotation. • Stellite® hardfaced standard integral seat results in broader applications, longer valve life and less maintenance. • Single-piece cast body, with face-to- face dimensions in accordance to ISO 5752, ANSI B16.10 and API 609 provides interchangeability with gate, high performance butterfly, plug and other valves for simpler and more flexible installation. • All metal construction and sealing and zero leakage performance translate into and inherently firesafe valve. • Long-length hardened bearings, incorporating a standard reinforced, die-formed, flexible graphite bearing protector ensure additional reliability. • Internally and externally retained, three times blowout proof stem is safer to operate and provides complete compliance with API 609. • Integral position indicators on the stem and the top mounting flange ensure positive disc position indication. Technical data General application Design standards : ANSI B16.34 T