Cryogenic Service To -196°C

All series cryogenic tested per BS 6364 to -196°C (-321°F) — suitable for LNG, LPG, liquid nitrogen and liquid oxygen service without risk of seat embrittlement or shaft seizure.

Butt Welding End Connection

VF-925AL and VF-875L feature butt welding end connections per ASME B16.25 — eliminating flanged joint leakage risk in extreme cryogenic and high-temperature pipeline systems.

Extension Bonnet

Extended stainless steel bonnet keeps gland packing and actuator away from the cryogenic process zone — preventing condensation, icing and gland freeze-up in liquid gas service.

Triple Offset Metal Seat

VF-875L and VF-876L triple offset geometry with weld overlay hard face disc provides bubble tight metal-to-metal shutoff from -196°C to +760°C — ANSI FCI 70-2 Class V leakage.

Double Eccentric Soft & Metal Seat

VF-923AL, VF-925AL and VF-926AL double eccentric design accepts PCTFE soft seat and SS316 / Inconel 625 metal seat — bi-directional bubble tight shutoff via patented floating retainer.

Patented Floating Retainer Ring

Proprietary floating retainer achieves 100% body-to-retainer sealing — valve can remain fully closed indefinitely without seat deformation or internal leakage, critical in cryogenic standby service.

Splined Shaft — No Taper Pin

XM-19 splined shaft eliminates taper pin drilling — preventing shaft cracking in thermal cycling from cryogenic to ambient temperature and increasing torque transmission reliability.

Blow-Out Protection

Dual shaft stop and bottom cover design provides positive anti-blowout protection — both components are stainless steel and maintain integrity across the full cryogenic temperature range.

Anti-Static Structure

Built-in anti-static device provides continuous electrical continuity between disc, shaft and body — compliant with ATEX 2014/34/EU for use in explosive atmosphere LNG and LPG installations.

Dust-Proof Bearing System

Stainless Steel + RTFE bushing system prevents ingress of foreign material into the shaft area — maintaining smooth operation without special tools after prolonged cryogenic service.

SIL2 / SIL3 Capable

Suitable for safety instrumented systems to SIL2 in low demand mode and SIL3 in redundant architecture — meeting the most stringent safety requirements in LNG terminals and nuclear power plants.

API 609 Monogram Certified

API 609 Monogram, API 607 fire safe, ISO 15848 fugitive emission and PED Module H certified — covering all major international procurement specifications for cryogenic butterfly valves.