Fig 207. Blue Cap - Grey Subs
These banking unions have a resilient âOâ ring in the blanking cap to provide an efficient and leak-proof seal suitable for 2000 PSI CWP.
Fig. 211. Blue Subs - Grey Nut
These unions protect against electrolytic action. There is no metal - to -metal contact between the subs. A resilent seal ring in the female sub provide additional sealing and protection from corrosion. Suitable for 2000 PSI CWP.
Fig 400. Black Nut - Red Subs
These unions are rigid in design and have all the three parts made of steel forgings. These unions are best suited for manifold and line connections. Unions from 3 inch through 8 inch sizes have O- rings for primary sealing. From 5â to 8â sizes C.W.P. is 2,500 PSI.