Besides addressing development of rotary valve technology since 1960, the literature cites model availability from 3 to 144 in. to operate in -320° to +1,742°F. at up to 6,000 psig. Designs comply with ANSI, API, ASME, MSS, DIN/EN/ISO, BS, AFNOR, and GOST standards.
With metal-to-metal torque seating, MAK is cited to offer "low cost of ownership" benefits compared to gate, plug, ball, or position-seated conventional butterfly valves.
Among 16 major rotary tight shut-off valves features: symmetrical seal ring in body, triple eccentric sealing, flanged or butt-weld construction, inherently fire-safe, low fugitive emissions, bidirectional, zero leakage.