DYNATORQUE BG

Multiturn bevel-gear operators

Our DYNATORQUE BG multiturn bevel-gear operators provide smooth, even torque transmission for thrust and nonthrust applications such as gate, knife gate, pinch, sluice gate, or globe valves. These operators can also be used in almost any multiturn, right-angle application requiring mechanical advantage.

Gearbox housing is ductile iron. Bevel and pinion gears are investment-cast ductile iron bevel for smooth, continuous transmission of torque.

Optional stem nuts are available for direct threaded interfacing and lug drivers for existing valve yoke nuts.

20 different frame and spur combinations provide output thrust from 22,000 to 150,000 lbf [98 to 667 kN] and torque output up to 3,500 lbf.ft [4,745 N.m]
Models BG3 and BG6 have standard ISO 5211 mounting patterns (optional patterns on request)
Gearbox housing of ductile iron
Investment-cast ductile iron bevel and pinion gears for smooth, continuous transmission of torque
Optional bronze stem nuts for direct threaded interfacing and lug drivers for existing valve yoke nuts
Motor mounts available for electric motor operation

DYNATORQUE Series BG Multiturn Bevel Gear Operators

Specifications

Model	Unit Weight, lbm	Max. Output Torque, lbf.ft	Max.Thrust, lbf	Gear Ratio	Mech. Adv.	Mounting Bolt (Size and Qty.)	Std. Mounting	Min.	Max.
BG3	26	625	22,000	3:1	2.55	(4)5/8-11	5.512	3/8-16(4.016)	5/8-11(6.000)
BG34	60	625	22,000	12:1	8.16	(4)5/8-11	5.512	3/8-16(4.016)	5/8-11(6.000)
BG4	83	1,600	30,000	4:1	3.4	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG42	83	1,600	30,000	8:1	6.12	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG44	115	1,600	30,000	16:1	10.88	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG46	119	1,600	30,000	24:1	16.32	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG424	117	1,600	30,000	32:1	19.58	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG426	117	1,600	30,000	48:1	29.38	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG4GT	83	2,300	80,000	4:1	3.4	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG42GT	83	2,300	80,000	8:1	6.12	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG44GT	115	2,300	80,000	16:1	10.88	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG46GT	119	2,300	80,000	24:1	16.32	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG424GT	117	2,300	80,000	32:1	19.58	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG426GT	117	2,300	80,000	48:1	29.38	(8)1/2-13	7.625	3/8-16(6.875)	5/8-11(10.180)
BG6	210	3,500	150,000	6:1	5.1	(8)3/4-10	11.732	5/8-11(10.00)	1 1/8-7(14.02)
BG62	212	3,500	150,000	12:1	9.18	(8)3/4-10	11.732	5/8-11(10.00)	1 1/8-7(14.02)
BG64	242	3,500	150,000	24:1	16.32	(8)3/4-10	11.732	5/8-11(10.00)	1 1/8-7(14.02)
BG66	242	3,500	150,000	36:1	24.48	(8)3/4-10	11.732	5/8-11(10.00)	1 1/8-7(14.02)
BG624	245	3,500	150,000	48:1	29.38	(8)3/4-10	11.732	5/8-11(10.00)	1 1/8-7(14.02)
BG626	245	3,500	150,000	72:1	44.11	(8)3/4-10	11.732	5/8-11(10.00)	1 1/8-7(14.02)

Bevel Gear Drivers

Manganese bronze stem nuts (Style C): These drivers are normally associated with rising stem gate valves. They are cast manganese bronze (ASTM 86300) and are supplied blank by Cameron and include mounting hardware to the appropriate bevel gear output gear.

Model	Part Number	Max. Bore, in	Min. Bore, in
BG3 Series	24-008	1.750	0.500
BG4 Series	24-006	2.500	0.750
BG6 Series	24-003	4.375	2.000

Lug drivers (Style D): These drivers are provided as a means of rotating custom yoke nut drivers. The lugs interface with the driver which has been adapted to the valves yoke nut. They are cast in ductile iron and are provided with mounting hardware to the appropriate bevel output gear.