CE Certification Cast Steel Quarter-Turn Gearbox Manufacturer, Supplier
This single-stage gear operator series with cast steel box is widely used in gas, oil, chemical plants, and nuclear power plants and for general industrial applications, with the torque ranging from 1000NM to 72000NM and the speed ratio from 30:1 to 1728:1.
Connect the bottom flange of the gear operator to the upper flange of the valve and slide the valve shaft into the hole on the worm gear. Tighten the flange bolt. The valve can be closed by turning the hand-wheel clockwise and opened by turning the hand-wheel counterclockwise. On the upper face of the gear operator, a position indicator and a position marking are mounted, through which the position of switch can be directly observed. The gear operator is also equipped with a mechanical limit screw, which can be adjusted and function to limit the position at the switch extreme position.
304, 306, LCB, or LCC casing
Limit switches
IP68 grade protection
Aluminum-bronze worm gear
Stainless steel input shaft
For high temperature up to 320℃
For low temperature down to -46℃
Main Components List
Part name
Material
Handwheel
A570 Gr.A
Cover
WCB
Housing
WCB
Worm
Carbon Steel
Left end cover
WCB
Worm gear/ Quadrant
Ductile Iron
Position indicator
SUS201
Input shaft
Protected Steel
Main Technical Parameter
Model
Gear ratio
Rating input (Nm)
Rating output (Nm)
Efficiency (%)
Hand-wheel
SGJ30
30:1
110
1000
27
300
SGJ50
50:1
100
1400
28
300
SGJ80
80:1
115
2500
27
400
SGJ70
70:1
200
4500
29
705
SGJ140
140:1
145
5600
28
600
Model
Gear ratio
Rating input (Nm)
Rating output (Nm)
Efficiency (%)
Hand-wheel
SJ320
320:1
90
7000
25
400
SJ330
330:1
150
12000
24
800
SJ410
410:1
160
17000
26
700
SJ520
520:1
165
23000
26
700
SJ560
1220:1
140
43000
25
800
SJ600
1422:1
160
60000
26
800
SJ720
1728:1
160
72000
26
800
WCB casing (LCB optional)
Welded hand-wheel (300 or above)
IP67 grade protection
Rugged construction
Nickel-plated input shaft for corrosion resistance
Ductile iron worm gear
NBR sealing materials
Suitable for -20℃ ~ 120℃ conditions
Designed with a lock mechanism
Frequently Asked Questions (FAQ)
Q: How do you install and operate the gear operator on a valve?
To install, connect the bottom flange of the gear operator to the valve's upper flange and slide the valve shaft into the worm gear hole, then secure it by tightening the flange bolt. To operate, simply turn the hand-wheel clockwise to close the valve and counterclockwise to open it.
Q: What materials are used for the main components of the gear operator?
Key components are constructed from durable industrial materials, featuring an A570 Gr.A handwheel, WCB housing/cover/left end cover, Carbon Steel worm, Ductile Iron worm gear, SUS201 position indicator, and a protected steel input shaft.
Q: What temperature ranges can these gear operators withstand?
Depending on the specific configuration, they can handle extreme low temperatures down to -46℃ and high temperatures up to 320℃. Standard configurations operate reliably between -20℃ and 120℃.
Q: What ingress protection ratings do these gear operators offer?
Our gear operators offer robust environmental sealing with options for either IP67 or IP68 grade protection, making them ideal for challenging and demanding industrial environments.
Q: Can the stroke range or switch positions of the gear operator be adjusted?
Yes, the gear operator is equipped with an adjustable mechanical limit screw designed to limit and secure the valve's position at its extreme switch endpoints. Limit switches can also be optionally configured.
