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E-mail
1257073858@qq.com
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15900658318
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No. 2788 Nanting Road, Fengxian District, Shanghai
Shanghai Yonglong Valve Factory
Shanghai Yonglong Valve Hydraulic Emergency Cut off Valve: A Strong Defense Line for Industrial Safety
Date: 2025-08-29Read: 2
In the complex network of industrial production, security has always been the sword of Damocles hanging high. The hydraulic emergency shut-off valve from Shanghai Yonglong Valve Factory is like a loyal guardian, silently guarding the safety of the production process and playing a very important role at critical moments.
1、 Working principle: Clever integration of mechanics and safety mechanisms
The core working principle of hydraulic emergency shut-off valve is based on hydraulic drive and multiple safety triggering mechanisms. It is usually paired with a remote hand-operated oil pump (such as the SB03-175 model) for cooperation. During normal operation, the operator uses the hand cranked oil pump handle to perform reciprocating movements, transmitting pressure to the valve cylinder. The increase in pressure causes the valve disc to open, allowing the medium to pass smoothly through the pipeline and ensuring the continuity of production.
When facing an emergency situation, such as a large amount of leakage or even fire in a pipeline, simply open the pressure relief valve of the hand-operated oil pump, and the oil pressure system will quickly release pressure. The valve disc will immediately close under the force of the spring or its own gravity, like adding a sturdy "gate" to the leaking pipeline, instantly cutting off the flow of the medium and preventing the spread of danger. In addition, the valve is also equipped with a low melting point fusible alloy plug. When the external ambient temperature rises to around 70 ℃ due to fire or other reasons, the fusible alloy quickly melts, the oil cylinder automatically releases pressure, and the valve can also be quickly closed, adding a reliable "fuse" to the system safety.
2、 Structural Design: Robust and Precise Balance
The hydraulic emergency shut-off valve of Shanghai Yonglong Valve Factory has excellent structural design. The valve body is made of corrosion-resistant steel (carbon steel with added corrosion-resistant alloy elements) based on the characteristics of the medium. Especially when facing corrosive media such as ammonia and gas, it can ensure long-term stable operation and withstand low temperatures up to -40 ℃, greatly meeting the strict requirements of different working conditions.
The valve adopts advanced Japanese cut-off valve technology internally, and the valve body is all precision cast, effectively solving the problems of poor sealing performance and easy leakage of ordinary valves. The main moving parts are made of chromium containing stainless steel, which not only improves corrosion resistance, but also ensures the stability and durability of the components during frequent movements. At the same time, the driving part is cleverly separated from the compressed valve body, which facilitates the replacement of vulnerable parts and O-rings of the cylinder in the later stage, reduces maintenance costs, and improves maintenance efficiency.
3、 Application areas: Widely covering high-risk and critical industries
This hydraulic emergency shut-off valve is widely used in multiple fields. In gas and ammonia storage tank stations, it is a key equipment to ensure storage and transportation safety, constantly preventing major accidents such as explosions and poisoning caused by gas leaks. In the petrochemical industry, hydraulic emergency shut-off valves play a crucial role in the storage and transportation of raw materials to the production process of products. They can quickly cut off the flow of materials in case of emergencies, avoiding catastrophic accidents such as fires and explosions. In the cooling system of thermal power plants, it also plays an important role in ensuring stable supply and emergency cutoff of cooling medium, and guaranteeing the safe operation of power generation equipment.
4、 Performance advantages: efficient, reliable, and durable
In terms of performance, the hydraulic emergency shut-off valve from Shanghai Yonglong Valve Factory has significant advantages. Its cut-off time is extremely short, usually ≤ 5 seconds, and it can respond to emergency situations in an instant, containing danger in its infancy. The pressure has a wide range of applications, with a nominal pressure of 1.6-4.0MPa. The working pressure of the oil cylinder is ≤ 6.0MPa, and the daily working pressure requirement is not higher than 6.0MPa and not lower than 2.0MPa, ensuring stable operation under different pressure conditions. At the same time, it can adapt to a wide temperature range, with a usage temperature of -40~+80 ℃, and can work normally in both severe cold areas and high-temperature working environments. In addition, when the manual oil pump fails for maintenance, the valve can be opened or closed by the handwheel to ensure that production is not affected, further improving its reliability and practicality.
5、 Usage and maintenance: a combination of simple operation and regular maintenance
During use, users need to pay attention to some key points. When installing, it is necessary to follow the principle of check valve, pay attention to the flow direction sign of the valve, use the end that needs to be protected as the inlet, and adopt a high inlet and low outlet installation method. In daily use, regular inspections should be conducted to check the pressure, temperature, and operation of related equipment every hour to ensure that the daily working pressure of the oil cylinder is within the normal range. During normal operation, the pressure relief valve of the oil pump should be closed. In case of emergency, the pressure relief valve should be opened and closed in a timely manner. In terms of maintenance, valves should be stored in a dry and ventilated room, with all passages sealed with plugs or covers. Long term storage requires regular inspection and application of rust proof oil on the processing surface. Clean and tighten all screw connections before installation. When placing an order, it is necessary to specify the flange sealing surface form, pressure rating, and connection standard in order to obtain a more suitable product.
The hydraulic emergency shut-off valve of Shanghai Yonglong Valve Factory, with its scientific working principle, excellent structural design, wide application fields, superior performance advantages, and simple use and maintenance characteristics, has become a reliable guarantee in the field of industrial safety, safeguarding the safety production of many industries. In the future industrial development, it will continue to play an important role and help the industry move forward safely and steadily.