Cheap SJ Single Stage Handwheel gear operators Supplier, Suppliers

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Cheap SJ Single Stage Handwheel gear operators Supplier, Suppliers

SJ single-stage models have a speed ratio from 24:1 to 80:1 and torque from 170NM to 2000NM. - Quarter turn gearbox designed to use for the manual Installation, maintenance, and operation of valves (e.g. butterfly/ball/plug valves) in pipelines.

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Product Description

Installation & Operation Guide

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.

Key Features & Options

Ductile iron casing

IP68 grade protection

Welded hand-wheel (200 or above)

Aluminum-bronze worm gear

Stainless steel input shaft

For high temperature up to 320℃

For low temperature down to -46℃

For marine use

Designed with a lock mechanism

Main Components List

Part Name	Material
Hand wheel(150~400)	Cast Iron
Handwheel (over 300mm)	Carbon structural steel
Input shaft	Carbon steel
Housing	Cast Iron
Seals	Nitrile rubber
Worm	Carbon steel
Quadrant	Ductile iron
Cover	Cast Iron
Indieator	SUS201

Main Technical Parameter

Model	Gear ratio	Rating input(Nm)	Rating output(Nm)	Efficiency(%)	Hand-wheel
SJ24	24:1	30	170	23	150 mm
SJ24	24:1	48	270	23	300 mm
SJ30	30:1	90	700	26	300 mm
SJ50	50:1	95	1200	25	300 mm
SJ80	80:1	95	2000	26	400 mm

Standard Specifications

Cast iron housing (ductile iron optional)

Protected steel input shaft (stainless steel optional)

Cast Iron hand-wheel (150~400)

IP65 grade protection

Nickel-plated input shaft, with more resistance to corrosion

Ductile iron worm gear

NBR sealing materials

Suitable for -20℃ ~ 120℃ working conditions

Stroke: 0 - 90° (± 5° adjustable)

Frequently Asked Questions (FAQ)

QHow do I operate the valve with this gear operator?

The valve is closed by turning the hand-wheel clockwise and opened by turning it counterclockwise. The switch position can be directly observed through the position indicator and position marking mounted on the upper face of the gear operator.

QWhat options are available for the housing and input shaft materials?

The housing is standard cast iron, with ductile iron available as an option. The input shaft is carbon steel (standard) with stainless steel or nickel-plated options to provide better corrosion resistance.

QWhat are the working temperature ranges for these gear operators?

Depending on the specific configuration, they are suitable for standard working conditions of -20℃ to 120℃, with specialized options available for low temperatures down to -46℃ and high temperatures up to 320℃.

QCan the rotation stroke of the gear operator be adjusted?

Yes, the stroke is designed for 0 - 90° with a ± 5° adjustable range. It is equipped with a mechanical limit screw to precisely limit the position at the extreme switch limits.

QWhat environmental protection levels do these operators support?

We offer models supporting IP65 grade protection, as well as high-specification versions with up to IP68 grade protection suitable for marine use and harsh submerged conditions.

QWhat is the maximum rating output for the SJ series?

According to the technical parameters, the output ratings range from 170 Nm (for the SJ24 model with a 150mm hand-wheel) up to 2000 Nm (for the SJ80 model with an 80:1 gear ratio and a 400mm hand-wheel).