Metro Tubes Corporation Industries 3 valve manifolds pipe to pipe (R), pipe to flange (T) and flange to flange (H) designed for connecting system impulse lines & transmitters. These manifolds consist of 1/2″ NPT(F), pipe to flange or flange to flange connections on 54mm (2 1/8″) centers, and of one equalizer valve, two block valves and 2 nos 1/4″ NPT(F) purge (VENT) connections. These manifolds are rugged in construction to withstand high pressures and temperatures. The manifolds are rated for pressures as high as 6000 PSI at 200 o F or 4000 PSI at 500 o F. with PTFE Packing. For a Higher Temperatures Grafoil Packing is used