Gear Boxes - Multiturn - Spur Gear Boxes

Description - The "MARSH" make SG series gear operators are spur gear type reduction units, designed either for hand-operation or electric multiturn actuators. The unit is suitable to operate valves with rising or non rising stems, such as gate, sluice & other rotary valves.

The units are efficient, reliable, rugged & simple in construction. The housing is totally enclosed. All the components are precisely machined from carefully selected materials. The units are grease lubricated to minimize friction.

Coupling - The units are available in the following versions of the coupling as per DIN 3210.

* Type A: A thrust support unit with threaded bronze bush for the rising valve stem.
* Type C: A coupling unit with claw for rising / non-rising valve stems.
* Type E: With a bored drive sleeve with keyway for non-rising valve - stems.

• Note: For rising stem-valve operators, a protection tube can be supplied if the valve-spindle-rise is known.

Full rotary application suitable for rising and non-rising sluice and gate valves.

Sr. No.	Model	Red. Ratio	Max Output torque kgm.	Max valve spindle accaptable - mm
1	SG02	2.5 : 1	40	52
2	SG404	4 : 1	65	55
3	SG406	6 : 1	100	60
4	SG408	8 : 1	130	80
5	SG412	12 : 1	200	90
6	SG4212	12 : 1	400	100

Constructional Details

Sr. No.	Qty	Description	Material
1	1	Main Housing, Top	C.I.GR.220 (I.S.)
2	1	Main Housing, Bottom	C.I.GR.220 (I.S.)
3	1	Connecting Flange	C.I.GR.220 (I.S.)
4	1	Input Gear Shaft	EN8
5	1	Output Gear	EN8/CAST ST.
6	1	Idler Gear	EN8
7	2	Ball Bearing	STD.
8	2	Bush	BRONZE/GM.