... per STD of BS, DIN,MSS valve, gate valve, butterfly valve... NRS Resilient Gate Valve comply with BS5163 Type A&B, DIN3352 OR AWWA C515 ... Y-StrainerRubber Expansion Joint: Single,Double Sphere ,Double Sphere UnionAir Relief Valve:Single & Double Orifice 1).Size: DN40-DN600 2). PN10,PN16 ...