• The YFL high temperature butterfly valve has High temperature materials for body and trim with RT testing;
• Valve seat seal face is overlaid by high temperature resistant and anti-corrosive materials;
• The disc seal ring can be all metal seal ring or multi-layers seal ring with stainless steel and  flexible graphite, carbon fiber or ceramic fiber etc.;
• Radiator structure avoids high temperature flow to actuator;
• Special packing structure suits for high temperature and high pressure working condition;
• The YFL multilayer metal seal butterfly valve adopts triple offset disc structure to realize no friction between disc seal ring and valve body seat when open or close and extends the service life greatly;
• The body seat fixed by two counter rings through bolts can be replaced easily.

Product range:

• Size: 1"～144" (DN25～3600)
• Pressure rating: Class 150～1500 (PN2.5～PN260)
• End connection: Flanged Wafer Lugged BW
• Body materials: CF8/CF8M for 816℃ WC6/WC9/CK40 for 595℃
• Disc materials: CF8 CF8M WC6 WC9 CK40 etc.
• Stem materials: XM-19 310H 316H 304H etc.
• Seat materials: F304 F316 stellited etc.
• Seal ring: all F304/F316 XM-19+graphite/ceramic fibre etc.
• Operation: Bare stem lever gearbox and handwheel electric pneumatic.

Technical standards:

• Design: ASME B16.34 DIN 3840
• Face to Face: API 609 ASME B16.10 ISO5752
• BW ends: ASME B16.25 ASME B31.8 EN12627
• Flanged ends: ASME B16.5 ASME B16.47 EN1092
• ISO top flange: ISO5211
• Materials: NACE MR 01-75
• Wall thickness: ASME B16.34
• Test and inspection: API 598
• Fireproof test: API 607 API 6FA
• Pressure and temperature rating: API609 ASME B16.34