Memory-Stop Device Gear Operators | Schlumberger
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Memory-Stop Device

DYNATORQUE accessory

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Cameron gear operators are modified with an infinitely adjustable memory-stop device suitable for valves and dampers, as well as most other quarter-turn applications requiring a self-locking mechanism. This configuration is ideal when a valve or damper ust always be opened or closed to the same exact position. The addition of a traveling nut module allows repeatable valve travel to the predesignated set point.

Our flexible manufacturing process allows us to offer both standard construction and custom configurations for customer-specific applications. Standard operators are available with various mounting interface dimensions. Custom-machined gears come with bores and bolt holes for direct mounting to the valve. Standard materials are cast gray or ductile iron, but we also offer a varied selection of alternate materials to your application requirements.

DYNATORQUE Memory-Stop Gear Operators

Specifications

Model Unit Weight, lbm Max. Output Torque, lbf.in Gear Ratio Turns for 360° Std. Output Bore, in Std. Key Size, in × in Std. Mounting Pattern
(Qty. and Size)		 Std. Mounting Pattern
(Bolt Circle)		 Mech. Adv. Handwheel Size, in Approx. Rim Pull, lbf
DT3 7 4,500 30:1 30 1.000 0.250 (4)3/8-16 3.250 8.10 14 80
DT8 19 8,000 30:1 30 1.750 0.375 (4)1/2-13 5.000 8.10 24 82
DT12 26 16,000 57:1 57 2.000 0.375 (4)1/2-13 4.921 13.68 30 78
DT21 34 26,000 60:1 60 2.500 0.500 (4)5/8-11 5.512 22.50 30 77
DT36 78 36,000 53:1 53 3.250 0.750 (4)3/4-10 6.496 19.00 36 105
DT50† 105 50,000 212:1 212 3.250 0.750 (4)3/4-10 6.496 60.80 20 80
DT54† 108 63,000 318:1 318 3.250 0.750 (4)3/4-10 6.496 91.20 18 77

† Units with spur assist.

Notes

  • Handwheels listed are recommended sizes to produce full rated torque with the rim effort listed.
  • Bore, keyways, and mounting patterns listed are for Cameron's standards.
  • Standard mounting patterns on the DT3 through the DT54 are (4) tapped holes straddling centerline at 45°.

Handwheels

Suited for Cameron products

6- to 48-in sizes, many in recessed or flat versions.
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