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Marine jack, also named a boat trailer jack or marine trailer jack, is a device used to raise and support the front or rear end of a boat trailer. It allows for easy detachment or attachment of the trailer to a vehicle, as well as providing stability and support when the boat is not in the water. The main purpose of a marine jack is to assist in the lifting, lowering, and stabilization of a boat trailer. It helps to evenly distribute the weight of the trailer and boat on the wheels, making it easier to maneuver the trailer and providing stability when it is parked or stored. Marine jacks are typically made of steel or other durable materials to withstand the harsh marine environment. They consist of a vertical position adjustment mechanism, a handle for manual operation, and a base or footplate for stability. Some jacks also have a swivel feature that allows for horizontal movement to align the trailer with the hitch or to maneuver in tight spaces. : Marine jacks come in different weight capacities to accommodate various sizes and types of boats and trailers. It is important to choose a jack with a weight capacity that matches or exceeds the combined weight of the trailer and boat to ensure proper support and stability. Marine jack is an essential tool for boat owners and trailer users, providing convenience, stability, and safety when towing, launching, or storing a boat
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Jiaxing Ouya Machinery Manufacturing Co., Ltd.
Jiaxing Ouya Machinery Manufacturing Co., Ltd. is a manufacturer specializing in the production of various hydraulic machinery and tools. Is China Wholesale Marine jack Suppliers and China Marine jack Factory. We are committed to the research, design and manufacturing of high-quality tools, including auto repair equipment and tools, garage tools, motorcycle repair tools, etc. Excellent quality, innovative structure and easy operation. Ouya Machinery has passed ISO9001 quality system certification, and some products have obtained CE certification. Our products are warmly welcomed in international markets such as Europe, the United States, Canada, Australia, Japan, and Southeast Asia.

We have always adopted high-quality technology, designed and developed high-quality, novel products, provided excellent services, established a good corporate image, and won praise from the industry and customers. Jiaxing Ouya Machinery Manufacturing Co., Ltd. is located in the center of Jiaxing, Zhejiang Province, about an hour's drive from Shanghai and Hangzhou. It is close to the Hangzhou Bay Cross-sea Bridge and has very convenient sea, land and air transportation. Welcome friends at home and abroad to visit us. We will be your choice and look forward to success together with you.

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  • Safety

    A safe work environment requires good processes and overall safety awareness. Every employee understands that safety is OUYA's number one priority.

  • Customization

    We have a strong R&D team, and we can develop and produce products according to the drawings or samples the customers offered.

  • Quality

    We have our own testing laboratory and advanced testing equipment, which can guarantee the quality of products.

  • Honesty

    In our work, we have been delivering on our commitment to our clients and all stakeholders to provide service and demonstrate high quality results.

  • Business Strategy

    OUYA always pursues the management as the guarantee, the quality as the life, the scientific and technological progress as the driving force, and the goal of fully meeting the needs of users, so as to continuously increase the market share of the products.

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    Our inclusive values reflect our strong belief that we seek out different perspectives and enrich our thinking to drive better performance.

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Safeguarding Marine Operations: The Vital Role of Overload Protection in Marine Jacks


Overload protection stands as one of the paramount safety features integrated into marine jacks, ensuring the safety of both personnel and equipment during lifting operations. The significance of overload protection lies in its ability to prevent accidents, structural failures, and equipment damage caused by attempting to lift loads beyond the jack's rated capacity. In this discussion, we will explore the importance, mechanisms, and implications of overload protection in marine jacks.
Importance of Overload Protection:
Safety Assurance:
Overload protection serves as a critical safety net, preventing the lifting of loads that exceed the capacity of the marine jack. By limiting the applied force to within safe limits, it minimizes the risk of equipment failure, structural collapse, and potential harm to personnel or nearby objects.
Equipment Preservation:
Overloading a marine jack can lead to premature wear and tear, stress fractures, or catastrophic failures in the lifting mechanism. Overload protection helps preserve the integrity and longevity of the equipment by preventing it from operating beyond its designed capabilities.
Risk Mitigation:
Lifting heavy vessels poses inherent risks, especially in dynamic marine environments where factors such as waves, wind, and currents can impact stability. Overload protection mitigates these risks by maintaining control over the lifting process and preventing unsafe conditions from arising.
Mechanisms of Overload Protection:
Load Sensors:
Load sensors are commonly employed in marine jacks to measure the weight or force applied to the lifting mechanism. These sensors can detect variations in load intensity and transmit signals to the control system, triggering protective measures when the load approaches or exceeds the preset threshold.
Pressure Relief Valves:
Hydraulic marine jacks often feature pressure relief valves that regulate the hydraulic fluid flow within the system. When the pressure exceeds a predetermined level due to an overload condition, the relief valve opens, diverting excess fluid and relieving pressure to prevent damage to the hydraulic components.
Load Limit Switches:
Load limit switches are electromechanical devices installed in marine jacks to monitor the position or displacement of the lifting mechanism. They act as a fail-safe mechanism, automatically interrupting power or hydraulic supply to the jack when the load reaches the predefined limit, thus preventing further lifting action.
Implications of Overload Protection:
Operational Safety:
Overload protection enhances operational safety by instilling confidence in operators and ensuring that lifting operations are conducted within safe working limits. It promotes a culture of risk awareness and responsible use of equipment in marine environments.
Equipment Reliability:
By safeguarding against overloading, overload protection contributes to the reliability and performance of marine jacks over their operational lifespan. It minimizes the likelihood of costly repairs, downtime, or premature replacement of components due to stress-related failures.
Regulatory Compliance:
Compliance with industry standards and regulatory requirements is essential for marine operators and vessel owners. Overload protection features help meet these compliance mandates by demonstrating adherence to safety guidelines and best practices in lifting operations.
In conclusion, overload protection stands as a cornerstone of safety in marine jacks, offering robust safeguards against the risks associated with lifting heavy loads. Through the integration of sophisticated sensors, valves, and switches, marine jacks equipped with overload protection provide a reliable means of ensuring safe and efficient lifting operations in diverse marine applications. As technology continues to advance, the evolution of overload protection mechanisms will further enhance safety standards and foster a secure working environment in the marine industry.