Stop check valve KLJC25-1.6P is a high-performance valve designed for hydrogen systems in power plants, especially suitable for control scenarios of flammable and explosive media such as hydrogen. Its core function is to achieve precise control of medium flow through one-way stop characteristics, while ensuring the sealing and safety of the system. It has important application value in power generation, chemical industry, energy and other fields.

Structure and working principle

The valve adopts a double sealing structure of bellows and packing. The bellows are made of corrosion-resistant and high-temperature resistant elastic metal material, which can withstand high-frequency telescopic movement, effectively isolate the contact between the medium and the valve stem, and achieve zero leakage of the valve stem. The valve disc is designed to move vertically along the center line of the valve seat, and quickly open and close through the short stroke of the valve stem. Combined with the carbide sealing surface (such as tungsten carbide or Stellite alloy), it significantly improves wear resistance and sealing reliability. In addition, the valve stem has excellent anti-friction and anti-corrosion properties after tempering and nitriding, further extending the service life.

Technical features and advantages

1. Safe sealing

In view of the high permeability and explosion risk of hydrogen, stop check valve KLJC25-1.6P completely eliminates the hidden danger of valve stem leakage through bellows sealing technology. Combined with the hard seal design, it can maintain long-term stable sealing at a working pressure of 1.6MPa, meeting the stringent requirements of hydrogen system for leakage prevention.

2. Resistance to medium corrosion

The valve body and key components are made of 304 stainless steel, 316L or special alloy materials, suitable for corrosive media such as hydrogen and thermal oil, to avoid sealing failure caused by material degradation, and reduce maintenance frequency and cost.

3. Operational reliability

The valve has a short opening and closing stroke and sensitive action. It supports manual or automatic control. It can quickly cut off the flow of medium in an emergency to prevent the spread of accidents. During installation, ensure that the direction of the valve body arrow is consistent with the flow direction of the medium, and the valve stem is perpendicular to the horizontal plane to avoid jamming or leakage due to improper installation.

4. Multifunctional adaptability

In addition to hydrogen systems, this valve can also be used in complex working conditions such as thermal oil and high-temperature steam. It undertakes medium cutoff, flow regulation and non-return functions in petrochemical, pharmaceutical, power and other industries, reducing system redundant equipment configuration.

Stop check valve KLJC25-1.6P is widely used in generator hydrogen cooling systems, hydrogen storage and transportation pipelines and closed-loop devices. As a core safety component, it ensures stable operation of the system. Daily maintenance must follow the following specifications:

- Regular maintenance: Check the sealing performance, valve body integrity and movement flexibility every 6-12 months. If leakage or wear signs are found, the seal or valve disc must be replaced immediately.

- Working condition monitoring: In a hydrogen environment, the concentration of combustible gas around the valve must be monitored to ensure that the interlock protection system can trigger the valve to close quickly under abnormal conditions.

- Spare parts management: It is recommended to reserve bellows and sealing components of the same model to cope with sudden maintenance needs and shorten downtime.

Through optimized design and strict manufacturing process, stop check valve KLJC25-1.6P reduces the cost of the entire life cycle while ensuring system safety. It is the preferred solution in the field of high-risk media control.

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