Manual Gearbox Operator Manufacturer

The sturdy and durable Hearken manual gearbox operator allows large-diameter valves to be easily opened and closed manually.

Manual Device Worm Gear Box

Item Number: HGB Series

Cast iron housing
Protected steel input shaft
Cast Iron hand-wheel (150~400)
IP67 grade protection
Suitable for -30℃ ~ 120℃ working conditions
Stroke: 0 – 90° (± 5° adjustable)
Spary paint color
Solid and compact structure

Less Effort in Manual Operation

Hearken manual gearbox operator utilizes an optimized transmission structure to effectively reduce the force required for operation. We’ve added a ball bearing to the end of the worm shaft to significantly reduce friction. The oil seal hole is reamed to a surface roughness of up to Ra1.6, further minimizing resistance and making manual valve opening and closing easier.

Your Professional Worm Gear Operators and Gearboxes Supplier in China

Our worm gear operators and gearboxes are widely used on valves for a number of process industries,and offer a highly robust, user friendly, and straightforward solution for industrial applications. It is like the “Sandwich Mounts” between a pneumatic quarter-turn actuator and a ball, butterfly, plug or damper valve.

Manual Override Gear Operator

Hearken Manual Control with Gearbox Operators is a system using gear – based mechanisms for users to manually operate machinery precisely.

HGB Series Gear Box

The HGB quarter-turn gearbox is a mechanical device designed to provide a 90-degree rotation (or a quarter turn) to an input shaft,converting rotary motion into a different angular direction

HDM Series Declutchable Gear Operator

The HDM Series Manual Override operators with handwheels that are directly mountable to valves.

HAM Series Manual Gear Operator

Depending on your specific application needs, the stem nut can be selected as a one-piece or split structure.

Why Choose Hearken Worm Gear Operators and Gearboxes?

Self-Locking Safety

Hearken worm gear transmission has self-locking characteristics, the worm lead angle is small, only the worm can drive the worm wheel, which can prevent the equipment from reversing, and is often used in lifting operations and other scenarios.

Quiet Transmission

Spiral transmission, the two-wheel tooth surface line contact, smooth operation, low noise, suitable for precision instruments, office equipment and industrial sites with high noise requirements.

Compact and Small

Hearken worm gear is with the compact design,small space can achieve a large transmission ratio, when transmitting the same power torque, it occupies less space than other transmission methods.

Heavy-duty and Durable

Worm wheels and worms are made of high-quality materials and advanced processes,with the high strength,which can withstand heavy loads, and operate stably in heavy machinery such as mines and construction.

Low Friction

Hearken worm gear reducers use a dedicated worm hob, ensuring a wide contact surface, tighter connection, and lower friction.

Grease Design

Hearken valve gear operators feature built-in grease lubrication, ensuring long-term smooth operation while reducing maintenance.

Self-Locking

Hearken valve manual override has a self-protection feature: “Self-locking”, which can keep the valve stably in the current position after adjustment, and prevent the valve from moving by itself due to vibration, pressure change and other factors.In this way, the operation is safer, and it can accurately control the flow and flow of the fluid in the pipeline, which is particularly practical.

Provides Limit Protection

Hearken manual gearbox operators are equipped with adjustable mechanical limits, allowing you to set limits at the open or closed end of the travel range. This prevents overtravel, which could damage the gearbox’s internal structure and impact your project’s overall progress. Hearken manual gearbox operators also offer a ±5° adjustable travel range of 0–90°, meeting varying valve opening requirements under various operating conditions and ensuring every operation is within a safe range.

Effectively Handles Highly Corrosive Working Conditions

Hearken manual gearbox operators feature a fully sealed design. Each manual gearbox utilizes NBR oil seals that meet national standards.
For internal protection, we incorporate sealing gaskets between the cover, housing, and top of the manual gearbox operator, along with blind screw holes in the center flange, to effectively prevent dust and water from penetrating. For external protection, Hearken manual gearbox operators also feature an NBR sealing gasket on the cover and a protective cap on the top cable. Hearken Flow’s multi-layered protection effectively prevents rust and seizure.

Compact and Lightweight, Flexible Adaptability

Compact Design

The Hearken valve gear operator features a compact design and lightweight materials, significantly reducing overall weight and reducing the burden on your system. Hearken also offers a variety of standard sizes and output torque specifications for flexible adaptation to different valves and operating conditions.

Flexible Installation

The Hearken valve gear operator utilizes international standard flange interfaces for greater flexibility. Its simple internal structure and removable internal worm gear make replacement and installation quick and easy, while also reducing future maintenance time.

Your Professional Manual Gearbox Operator Manufacturer in China

The Hearken valve gear operator has a large transmission torque limit. The worm gear structure adopts positive displacement and increases the tooth thickness to improve the overall rigidity and prevent the loss of efficiency due to operational wear.

Application of Manual Override

The manual override of the valve is controlled to open and close by manual operation.

Industrial Field

Hearken manual override is suitable for cutting and regulating medium or small-sized pipelines.

Oil and Gas

Hearken highly efficient worm gear operators ensure precise and fast operation in oilfield and refinery pipelines.

Agriculture and Water Conservancy

Hearken manual override is suitable for pipe flow distribution manual valves or small gate and rural drinking water control valves.

Building Drainage

Hearken manual override can be used for indoor water pipe maintenance valves, fire manual valves can also be used for water pipe maintenance valves.

Marine

Hearken worm gear operators feature a rugged design, resistant to salt spray and seawater corrosion, and are widely used in applications such as valve opening and closing on ships and valve control on offshore platform pipelines.

Special Scenarios

Hearken manual override is also suitable for some special scenarios, such as emergency cut-off in flammable and explosive environments; or manual operation of pipelines in remote areas without power.

Related Products

Valve Manual Device Worm Gear Box with Feedback

Body Material: Die Cast Aluminium alloy
Shaft Material: Qt450
Ratio: 26:1, 28:1, 38:1, 54:1,80:1, 78:1
Rated Output: 250 Nm~3000 Nm
Temperature: -30°C-120°C
Stroke: 0-90° (+5°degrees adjustable)
Protection Class: Weather proof-lP67
Flanged Connection: IS0 5211 or DIN 3337 Standard
Colours: Black and Red

Valve Handwheel Mechanism

Body Material: Die Cast Aluminium alloy
Shaft Material: 45# Steel
Ratio: 26:1, 28:1, 38:1, 54:1,80:1, 78:1
Rated Output: 250 Nm~3000 Nm
Temperature: -20’C-70’C
Optional Temperature: -45°C-50°C
Protection Class: Weather proof-lP67
Flanged Connection: IS0 5211 or DIN 3337 Standard

Limit Switchbox with Flat Indicator Stainless Steel Bracket

Body Material: Die Cast Aluminium alloy, polyester powder coating
Connection: 2 X M20 Cable entries
Shaft Material: Stainless Steel
Limit switch Type: 2 X SPDT Mechanical
Voltage/amps: 250VAC,125VAC, 250VDC/0.3A, 125VDC/0.6A, 30VDC/10A
Temperature: -20℃-70℃
Enclosure Rating: Weatherproof-IP67
Mounting Bracket: Carbon Steel or Stainless Steel
Optional: Proximity Sensors
Colours: Various Colours

Ductile Iron Wafer Butterfly Valve with Gear Box

Ductile iron wafer butterfly valve with gearbox is a kind of butterfly valve which is used for flow control. It is made of ductile iron body. The gearbox is made of aluminum alloy . It is widely used to control the flow of water, oil, gas and other media in pipelines. The advantages of this kind of valve are simple structure, light weight, easy to install, no leakage, low cost and long service life.

FAQ

A: It allows you to manually operate a pneumatic valve during an air supply failure or emergency.

A: For emergency safety. It ensures you can still open/close the valve if the automation system fails.

A: Yes, the worm gear design prevents the valve from moving under line pressure.

A: No. When disengaged (in auto mode), it allows the pneumatic actuator to work at full speed.

A: Yes. It is commonly used on large ball valves where high torque makes lever operation difficult. Ensure the ISO 5211 mounting pads match.