Imported oxygen stop valve
Overview of imported oxygen stop valve products
Oxygen shut-off valve (special oxygen shut-off valve, stainless steel oxygen shut-off valve, natural gas shut-off valve): In physical and chemical experiments, oxygen, nitrogen, hydrogen, argon and other gases are often used. These gases are generally stored in dedicated high-pressure gases. When in use, the gas pressure is reduced to the range required by the experiment through the pressure reducing valve, and then finely adjusted by other control valves, so that the gas is input into the use system.
The oxygen shut-off valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface to not leak. When the medium enters the valve six from below the disc, the resistance that the operating force needs to overcome is the friction force of the valve stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve The diameter of the stem must be large, otherwise the valve stem will bend up failure. In recent years, since the emergence of self-sealing valves, the flow direction of flanged globe valves has changed from above the valve disc into the valve cavity. At this time, under the action of the medium pressure, the force of closing the valve is small, while the force of opening the valve is large. The diameter of the rod can be reduced accordingly. At the same time, under the action of the medium, this type of valve is also tighter. my country's valve "Sanhua" once stipulated that the flow direction of the stop valve should be from top to bottom.
When the oxygen shut-off valve is opened, when the opening height of the valve flap is 25% to 30% of the nominal diameter, the flow rate has reached a large value, indicating that the valve has reached the fully open position. Therefore, the fully open position of the stop valve should be determined by the stroke of the valve disc.
Working principle of imported oxygen stop valve
As the opening and closing device on the oxygen pipeline in the metallurgical industry, the oxygen valve has many particularly strict requirements compared with other general valves. Because oxygen is a flammable and explosive dangerous product, it must be leak-proof, anti-static, and spark-proof to avoid accidents. In terms of structure, the design is: the valve stem only lifts and does not rotate when the valve disc is opened and closed, which effectively reduces the wear of the seal pair, the wear of the packing and the wear of the upper seal; the side flange is equipped with a grounding screw to avoid static sparks; The exposed part is sealed with plexiglass to prevent dust and oil
Imported oxygen stop valve application
Used in urban liquefied petroleum gas storage stations, and also used in the liquefied gas system of oil refineries, petrochemical plants, and petrochemical plants, as an opening and closing device for controlling medium interception
Main technical parameters of imported oxygen stop valve
Nominal diameter: DN15-400mm
Nominal pressure: PN1.6-4.0Mpa
Applicable temperature: ≤200℃
Applicable medium: oxygen
Valve body: silicon brass, stainless steel
Stem: stainless steel
Spool: copper, stainless steel
Packing: PTFE
Selection of imported oxygen stop valve
a: Product name and model of oxygen shut-off valve
b: The operation mode of the oxygen shut-off valve (manual, turbo drive, pneumatic, electric, etc.)
c: Material and hardness of the sealing surface of the oxygen shut-off valve
d: Body material of oxygen shut-off valve
e: Pressure of the oxygen shut-off valve
f: The medium used for the oxygen shut-off valve (name, viscosity, particle corrosiveness, toxicity)

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Continuously improving the quality of services and keeping improving, "sincere service" is the eternal theme of KUNAG. Kunag strictly complies with the requirements of ISO9001-2000 quality system certification, strictly controls the quality and responsibilities to the people to ensure the healthy operation of production, sales and service. To strengthen communication with customers and to provide our customers with quality products and perfect service, we hereby make the following commitments:
Product Standards
Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
pre-sale service
Product introduction, technical communication, non-standard product design, troubleshooting.
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For special or complex products, our factory arranges technicians to train and guide users on product use, troubleshooting, tuning and maintenance.
After sales service
The warranty period of Weitong products is 12 months from the factory, and the "three guarantees" service (return, replacement, repair) is implemented.
During the use of our products, our factory regularly organizes technical and inspection personnel to visit and solicit user feedback on product quality, use conditions, and improvement opinions in order to further improve product quality.
Quickly respond to customer complaints about product quality problems, and after-sales service personnel rushed to the scene within 24-36 hours (48 hours outside the province).
For after-sales service, users are required to fill in the quality feedback form after the service and make appraisal opinions, while improving Guardian\'s service quality.

Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.

Contact: Peng gong
Q Q: 2030185432
Mobile: 18918462396(WeChat same number - 24 hours service)
Landline: 021-59718851
E-mail :kunage@126.com