API 6D Swing Check Valve 2026年3月30日 作者 Jessamyn API 6D Swing Check Valve Prevent reverse flow in oil, gas and industrial pipeline systems. Size: 2″ ~ 48″ Pressure: Class 150 ~ 2500 Material: WCB, F304, F316 Standard: API 6D, ASME B16.34 📩 Contact Us for Best Price Fast reply within 2 hours. WhatsApp Email