API 6D Flanged Cryogenic Ball Valve
China API 6D Flanged Cryogenic Ball Valve, Find details about China Lcc Ball Valves, Lcb Gate Valve from API 6D Flanged Cryogenic Ball Valve
Cryogenic ball valve is mainly suitable for ethylene, liquefied natural gas and other chemical equipment, the output of liquid low temperature medium such as ethylene, liquid oxygen, liquid hydrogen and so on.This kind of media is not only flammable and explosive, but also in the heat to gasify, gasification, volume expansion of hundreds of times.And these medium permeable force is strong, easy leakage, processing manufacturing is more difficult.
1. Pressure parts of the material can withstand the medium temperature changes caused by the expansion, contraction, sealing parts of the structure in the temperature changes will not produce permanent deformation.Used to - 100 ºC when the following conditions, should be carried out before finishing the cryogenic valve parts processing, diffuse in the liquid nitrogen tank for cooling, the parts when the parts - 196 ºC temperature is reached, began to heat preservation l - 2 h. Then remove the outside box natural treatment to room temperature, repeat cycle 2 times.
2. The valve cover adopts long-neck structure, whose purpose is to protect the function of the stuffing box, keep the stuffing box away from low temperature and ensure the sealing effect of the packing.At the same time, the cooling material can be wrapped to prevent the loss of cold energy.The length of the long neck (H. See figure below) can be selected according to the temperature used and the thickness of the cooling material.When the packing sealing effect is reduced, grease can be added from the middle of the packing box (see the structure of composite packing) to form an oil seal layer to reduce the pressure difference of the packing box and improve the sealing performance.
3. Using the temperature lower than 100 ºC, the valve stem material after chrome plating or nitriding process, to improve the surface hardness of the valve stem, improve the reliability of packing seal.
4. Cryogenic ball valve has to prevent abnormal boost structure, because the cryogenic valve medium gasification, the volume of dramatic expansion, pressure will be abnormal rise, when the pressure in the valve chamber, the valve chamber and the inlet side of the connection, or in the valve inlet side of the placement of pressure relief valve, to ensure the safety of the use of the valve.
5. The gasket used for cryogenic ball valve has the ability to seal and recover reliably under normal temperature, low temperature and temperature change.
Execution Standard:
Design specification: GB/T1224, API 6D
Connection dimensions: GB/T 9113, ASME, B16.5
Test and inspection: GB/T 13927, API 598, API 6D
Product Show:
Advantages:
| 1. Focusing on exporting, more than 80% products are sold worldwide. |
| 2. Provide Full Sets of Solutions for your various industrial needs. |
| 3. Strict & Traceable Quality Control System |
| 4. Simplified & Effective Managing System |
| 5. Competitive Price & On-time Delivery, with Integrated Services |
Foundry (Castings and forgings)
Quality Control:
Packing and Shipment:
Application:
Valves serve a variety of purposes in the industrial, engineering, manufacturing and scientific communities. Selecting the right valve can determine the success or failure of the system or process.
The main purpose of a valve is to control media flow through a system. The valve may be used to start, stop, or throttle the flow to ensure safe and efficient operation of the process. Valves play a large role in most industries. With high quality and excellent service, AFC TECH valves are widely used Oil & gas industry, refinery & petrochemical industry, off shore, power generation, mining industry, pulp and paper, water treatment etc.
Aftersales Services:
1. For each batch of goods we made, we'll furnish MTC to show the goods are 100% inspected & tested, and qualified to use.
2. Full sets of parts and accessories in the AFC TECH of the technical drawing can be supplied, in case of any possible repair or change.
3. Even our goods are made under strict quality control system, but still can not 100% avoid unexpected conditions or quality problems forever, that's why we furnish a warranty of 18 months from shipment date, during this period, we'll take responsibility for the repair, change or return for free due to quality problems.
FAQ:
1. Q: Are you a manufacturer or a trading company?
A: We are a production and marketing company, industry and trade integration. Our factories are responsible for manufacturing, we are dealing with all exporting business.
2. Q: Do you have any international certificates?
A: Yes, our factories have CE and ISO etc. certificates.
3.Q: Do you have any export experience?
A: Yes, we have been exported a lot worldwide. More than 80% of our products are
for exporting.
4.Q: Do you have any quality certificates?
A: Yes, EN 10204 3.1 Material Certificate will be supplied together with delivery. Certificate of Origin shall be supplied upon client's request
5. Q: Do you have any Non-destructive Test?
A: Yes, we have upon the customer's requests.
6. Q: Can you manufacture valves with our brand?
A: Yes, we can manufacture with our own brand or OEM.
7. Q: Do you have any guarantee?
A: Yes, we warrant our products against defects from faulty manufacturing for 12 months from the initial date of installation, or within 18 months after shipment, subject to whichever to be earlier.
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