• The YFL high temperature metal seal ball valve adopts ball and seat metal to metal seal structure;
• The ball and seat of YFL metal seated ball valve are hardened by supersonic spraying, nickel-based spray, special face hardening, Tungsten carbide spray, ceramic materials etc.;
• Sealing face materials with good abrasion resistance and impact resistance;
• The unique ball grinding technology makes the ball achieve excellent roundness and finish to realize reliable sealing performance;
• The disc spring or spring loaded sealing structure absorbs the thermal expansion of valve parts to ensure the ball valve opened or closed easily without block under high temperature;
• The blade of valve seat on both sides can scrape the solid-liquid mixed impurities bonded on the ball surface automatically to be self-cleaning and ensure easy operation and good sealing performance;
• Added wear resistant busing in the channel of ball valve to enhance wear resistance;
• Prevent incorrect operation structure;
• Anti-corrosion and anti-sulphur stressing cracking;
• Full bore and reduced bore;
• Floating ball and trunnion mounted ball;
• Double block and bleed for trunnion mounted ball;
• Bidirectional seal for double piston effect seat structure;
• Cavity automatic pressure relief for single piston effect seat structure;
• Fire safe, automatic anti-static and anti-blowout stem design.

Product range:

• Size: 1/2''～40''
• Pressure rating: Class 150～2500
• 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+WC F304+WC F316+WC F51+WC F53+WC F55+WC etc.
• Seat materials: A105+Co or Ni alloy F304+Co or Ni alloy F316+Co or Ni alloy F316L+Co or Ni alloy F51+Co or Ni alloy F53+Co or Ni alloy F55+ Co or Ni alloy etc.
• Operation: Bare stem Wrench gear electric pneumatic electro-hydraulic gas over oil actuator

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
• Materials according to NACE MR01-75
• Test and inspection: API 598 API 6D
• Pressure and temperature rating: ASME B16.34