... Co.,Ltd is always at your service.Resilient seated check valves Description1. Resilient seat check valves be composed with body, bonnet and rubber disc ... it's viscosity is high, the resilient seat check valves is not suitable. valves materials of constructionBody Materials: Cast Iron, Ductile IronBonent ... : PN10, PN16,Class 150, JIS 10KStandard : ANSI, DIN, JIS End Connection: FlangeOperate: Automatic