The Mark 33 is a motor-operated valve featuring the Jordan sliding gate seat and heavy-duty industrial motors for proportional (resistance), on-off, 4-20 mA electronic control. Models include the Mark 33 in sizes 1/4" through 2" (DN8 through DN50), the high flow Mark 331/332 with Cv's up to 70 (60,34 Kv), and the Mark 39 with three-way body.
The Mark 33 delivers exceptional pressure drop abilities due to the short stroke of the sliding gate seat which permits greater utilization of the motor torque output.