不知道哪里发帖，请教一下专业的福友。

Machine generated alternative text: Gate Valve assembly 3.1/8“ -5M upgraded 6.5M All wetted surface cladded with Inconel 625 - Working Pressure - 6500 Psi - Stamp on both flanges 3.1/8? 5000 psi R35 - WP 6500 Psi - Acc. API 6A - Nace MR 0175/ ISO 15156 - full bore - non rising stem -back seat -Complete with handwheel -Material: Forged 75k -Material Class: HH -NL -Temperature Class: U -PSL:3G -PR :2 (Certificate to be provided). -Pressure test acc. to API 6A PSL 3G PR 2 -Coating with primer (Zinc Ethyl Silicate) -Certificate: EN 10204.2004-3.1 -Material : (Full traceability ) for mechanical properties, heat treatment and chemical composition. 这个产品不是本人正在的，所以不了解，如果知道的请不吝赐教！