oliver valvetek offers a range of rotary gate valves with nominal bore sizes of 3/8″ [9.5mm] and 1/2″ [13mm].
the small-bore subsea rotary valves are qualified at different pressure ratings of up to 15,000psi [1034 bar] and 16,500 psi [1138 bar] – 1.65 x cwp seat test was also conducted (if the system is rated at 10,000 psi). rotary gate valves are suitable for water depths to 10,000 ft [3050m].
qualification testing is performed to the exacting standards of api 6a appendix f pr2 and 17d 2nd ed (operable temperature range: -20f [-29c] to 350f [ 177c] with non-operable temperature range: -50f [-46c] to 350f [ 177c].
the rotary valves offer a good alternative to a needle valve where typically you would expect to have low operational torques but high torques to damage. another design feature is that should the rotary gate valve be over-torqued and extrenal valve stops are compromised, the valve will continue to rotate without damaging the internals.
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