Memory-Stop Device

DYNATORQUE accessory

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.

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°.