• The Ball of the YFL pipeline orbit ball valve rotates after separated from seat without any abrasion between ball and seat and solve the seat abrasion problem of traditional ball valve, gate valve and plug valve;
• The YFL API 6D orbit ball valve adopts single seat design to ensure bidirectional seal with zero leakage and solves the problem of pressure increased in the cavity of valve with double seats;
• Much longer serve life and less breakdown time than traditional ball valve, gate valve, plug valve duo to no abrasion between ball and seat;
• Much lower operate torque duo to no abrasion between ball and seat, except for large size valve, small handwheel is enough to operate the valve, and gearbox is no need;
• Best flow characteristic with high Cv value minimizes the corrosion problem;
• Top entry design realizes maintenance online and reduces breakdown time;
• When the ball separated from the seat, the fluid can pass through completely and wash out the residue bonded on the ball surface by 360° around to achieve self-cleaning and reduces the impact on part of the seat by high speed fluid;
• The stem guide groove and double guide pins control the rising, falling and rotating of stem and the bevel at the bottom of stem can supply mechanical wedge force to press the ball to the seat to achieve tight seal without influence by pressure difference of pipeline;
• Ball sealing face is overlaid by Nickel-based alloy, Hastelloy or other alloy to ensure the tightness and service life in the harshest working condition;
• Fire safe, automatic anti-static and anti-blowout stem design;
• When turns the handwheel anticlockwise, the stem rises and the ball separates from seat first and then rotates by 90°without abrasion until full opening position while the stem is lifted to the highest position;

• When turns the handwheel clockwise, the stem falls and the ball rotates by 90° without abrasion until full closing position. Then keep on turning the handwheel for a few rounds, the bevel at the bottom of stem can press the ball to the seat tightly to achieve reliable seal.

Product range:

• Size: 1''～28''
• Pressure rating: Class 150～1500
• End connection: RF RTJ BW
• Body materials: Carbon steel A105 WCB WCC WC6 WC9 C12A; Low temperature steel LF2 LF3 LCB LCC; Stainless steel CF8 CF8M CF3M CF8C F304 F316 F304L F316L F316Ti; Duplex stainless steel 4A 5A F51 F53 904L; Super duplex stainless steel F55 etc.
• Ball materials: A105 overlaid stellite or Ni alloy LF2 overlaid stellite or Ni alloy F304 overlaid stellite or Ni alloy F316 overlaid stellite or Ni alloy etc.
• Seat materials: A105 overlaid stellite or Ni alloy LF2 overlaid stellite or Ni alloy F304 overlaid stellite or Ni alloy F316 overlaid stellite or Ni alloy etc.
• Operation: Bare stem Wrench gear electric pneumatic.

Technical standards:

• Design: API 6D
• Face to Face: API 6D
• BW ends: ASME B16.25 ASME B31.8
• Flanged ends: ASME B16.5 ASME B16.47
• Wall thickness: ASME B16.34
• Fireproof test: API 607 API 6FA
• Test and inspection: API 598 API 6D
• Pressure and temperature rating: ASME B16.34