... per STD of BS, DIN,MSS valve, gate valve, butterfly valve... NRS Resilient Gate Valve comply with BS5163 Type A&B, ... valve PN25/PN40 Ball Valve DIN/NF/MSS SP-72 Strainer: DIN standard,Basket Strainer, Grooved End Y-StrainerRubber Expansion Joint ... : Single,Double Sphere ,Double Sphere UnionAir Relief Valve:Single & Double Orifice 1).Size ...