• The rough machining parts of YFL Cryogenic ball valves need special low temperature treatments to relieve the mechanical stress to make sure the materials performance in low temperature working condition and finish machining dimensions to avoid leakage duo to expansion, shrinkage and deformation of materials in low temperature working condition;
• The finish machining parts need strict wash to clean any oil contamination before assembly to ensure working performance.
• The YFL low temperature ball valves need special low temperature materials impact test equipments, liquid nitrogen storage device, low temperature treatment tank, cryogenic valves shell and seal test bench;
• Extended stem protects the stem packing to make sure the stem seal;
• Valve stem treated with chrome plated or nit riding to enhance the surface hardness of stem
• Lip seal ensures reliable seal in low temperature working condition;
• Imported seal materials with stable low temperature performance;
• Low fugitive control;
• Cavity pressure self relief;
• Soft seal and metal seal structure;
• Floating ball and trunnion ball structure;
• Side entry and top entry structure;
• Top entry structure is suitable for online maintenance;
• Fire safe, anti-static and anti-blowout stem design.

Product range:

• Size: 1/2"～32" (DN15～800)
• Pressure rating: Class 150～1500 (PN16～PN250)
• End connection: RF RTJ BW
• Bore: Full bore reduced bore
• Body materials: LCB/LF2 (-46℃) LC3/LF3 (-101℃) CF8/304 (-196℃) etc.
• Ball materials: LF2 LF3 F304 F316 etc.
• Seat materials: TFM NRG PCTFE  PEEK KEL-F or metal to metal seal etc.
• Operation: Bare stem wrench gear electric pneumatic electro-hydraulic gas over oil actuator

Technical standards:

• Design: API 6D ASME B16.34  DIN 3357-1，EN12516-1
• Face to Face: ASME B16.10 DIN 3202F1/F4/F5/F17/F18
• BW ends: ASME B16.25 ASME B31.8 EN12627
• Flanged ends: ASME B16.5 ASME B16.47 EN1092
• Wall thickness: ASME B16.34
• Fireproof test: API 607 API 6FA
• Test and inspection: API 598 API 6D DIN3230/3 EN12266
• Pressure and temperature rating: ASME B16.34
• Materials: NACE MR 01-75