... for petroleum handling, chemical processing, dry bulkhandling, agricultural, and water, et camlock coupling type a, b, c, d ... applications for petroleum handling, chemicalprocessing, dry bulkhandling, agricultural, and water, etc.Standard: DIN EN 14420-7-2005Cast method ... Smooth face of groove and great resistance to vibration .(4) Working pressure is 1.6Mpa and strength test pressure is 2.4Mpa ...