Mk1, megastream, 1.50/2 inch. Valve. Hardness 37 hrc min. The manufacturer calls this item a seat ring.
A replaceable item designed to provide a stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see insert, engine valve seat.
Classification: Parts of taps, cocks, valves and similar appliances, nesoi
NSN 5975-00-522-2711
NSN 6610-01-323-7045
NSN 7035-00-513-9764
NSN 6685-00-814-5704
NSN 5998-01-555-8808
NSN 5930-01-211-6123
NSN 5960-00-848-9094
NSN 5935-01-446-8807
NSN 6685-01-158-6565
NSN 5945-00-484-1869
NSN 6645-01-360-9689
NSN 2925-01-077-6867