Product Description
Overview
The top entry ball valve adopts the top-mounted straight-through full-diameter. The straight-through flow channel has no flow resistance, the flow resistance coefficient is zero, the water loss is zero, the valve sealing surface is not washed, and the ball core and seal are not washed when opening and closing, which can meet different occasions. need. long lasting. The characteristic of this valve is that the valve can be checked and repaired online after the pressure of the working condition device system is relieved.
It is mainly used for cutting off or circulating pipeline transportation and terminal distribution of pipeline media such as petroleum exploration, food, medicine, petroleum, chemical, electric power, metallurgy, natural gas, steel, environmental protection, urban construction, environmental protection, papermaking, etc. (the media such as gas, Oil, hydrocarbons, acidic fluids, water), seawater treatment, and high-load environments in the chemical industry are safe and reliable.
Features
1. The overall top-mounted design structure of the valve body: the overall top-mounted structure of the valve body is stronger than the usual valve body pipeline. The structural improvement and technical transformation meet the requirements of earthquake resistance. After the pressure of the work device system is relieved, the valve can be On-line inspection and maintenance make the device maintenance simple. During maintenance, only the valve cover and the support body need to be lifted out without removing the entire valve from the pipeline. During maintenance operations, the medium in the pipeline can be retained as appropriate. This eliminates the use or maintenance of many aspects of preliminary auxiliary work, does not cause energy waste, and makes maintenance more convenient.
On certain occasions, the top entry ball valve may not affect the normal operation of the pipeline system during the emergency repair. As long as the ball and valve seat assembly are taken out, the valve cover can be quickly sealed to immediately restore the pipeline system to operate under pressure, so that the emergency repair The loss of benefit caused by the valve is reduced to a smaller extent. Flange connection, easy to replace or disassemble and repair the valve.
2. Automatic pressure relief structure: When the pressure in the middle cavity rises abnormally, when the stagnant pressure in the valve cavity exceeds the preload of the spring abnormally, the valve seat moves back and separates from the sphere to achieve the effect of automatic pressure relief. After the pressure is relieved, the valve seat Automatic reset.
3. Emergency sealing: The grease injection hole and groove distribute the sealing grease reasonably. There is a check valve in the grease injection hole and a quick connector for the grease injection gun. When the valve seat and valve stem seals are damaged and cause leakage, the sealing grease injected through the grease injection valve can act as an instantaneous seal.
4. Fire-proof and explosion-proof structure: The top entry ball valve is designed as a fire-proof and explosion-proof structure. The top entry ball valve is equipped with an explosion-proof valve. The fire-resistant design of the top entry ball valve complies with the requirements of API607 and JB/T6899 standards, and the explosion-proof valve automatically relieves pressure. The valve seat is designed for fire protection. When the sealing ring is burnt, the valve seat sealing ring is quickly pushed to the sphere under the action of the spring force to form a metal-to-metal seal, which has a certain degree of sealing effect.
5. Anti-static structure: When operating the valve, due to the friction between the ball and the valve seat, static charges will be generated and accumulated on the ball. In order to prevent the generation of static sparks, an anti-static device is specially installed on the valve. It will accumulate on the ball. The charge on the derivation.
6. Blocking and drainage: The top entry ball valve is equipped with a drainage hole. When the valve is closed, the upstream and downstream valve seats block the fluid, and the stagnant in the cavity of the valve body can be drained through the drainage device.
7. Valve stem anti-flight design: The valve stem is separated from the ball, and designed to prevent flying according to ASME B16.34 and BS 5351 standards. There is an integral safety packing disc, which prevents the valve stem through the safety packing disc.
8. Full diameter structure and reduced diameter structure: Top entry ball valve products have two series of full diameter and reduced diameter. The inner diameter of the channel of the full bore ball valve is the same as the inner diameter of the pipeline, which is convenient for management and cleaning, while the weight of the reduced-diameter series ball valve is relatively light; the reduced-diameter series applies high temperature and high pressure.
9. Double-sealed valve seat: The valve seat is independent and floatable. The valve seat is designed to cut off the medium automatically by internal pressure (dual piston effect). When the upstream seal fails, the downstream can still be sealed.
10. Double sealing of valve stem: The double sealing of valve stem can be realized by the safety packing disc with PTFE polytetrafluoroethylene packing and O-ring seal, which can replace the PTFE polytetrafluoroethylene packing of the valve stem under pressure. Packing: PTFE polytetrafluoroethylene with low friction coefficient and self-lubricating effect to reduce operating torque. The valve stem can be lengthened according to the user's specific installation conditions. The buried top entry ball valve is convenient for ground operation.
Scope
| Nominal size |
2"~24"(DN25~DN600) |
| Nominal pressure |
Class 150~Class 2500(PN10~PN420) |
| Standard: |
ASME B16.34, API6D, ISO17292 |
| Body material |
Carbon steel, Stainless steel, Alloy steel, Duplex stainless steel |
| End connection |
RF, BW, RTJ, |
| Operation |
Manual, Pneumatic, Electric, Hydraulic |
Product Parameters
Company Profile
Jitai Valve Group is a genuine valve manufacturer.
- 7000-sqm factory
- 100 employees
- 5+ senior engineers
- 30+ design patents
- 2 million sets of valves delivered
- 20 million USD annual revenue
Since 1988, we have been expert in manufacturing a wide scope of industrial valves including:
- Gate valves
- Globe valves
- Check valves
- Ball valves
- Butterfly valves
- API valves
- Steam valves
- High pressure valves
- High temperature valves
- Power Plant valves
Our Advantages
- Heavy-duty valve expert with proven expertise in harsh environment;
- Stringent quality control and traceable reports to provide zero-defect products;
- Rugged and durable configuration according to API, ASME, BS, JIS, EN standards;
- All kinds of UG, PRO/E, Solidworks software simulations ensure the efficiency and robustness for tailored components;
- Complete BV certification report can be downloaded on our page About us.
FAQ
1.Q:Are you are a trading company or manufacturer?
A:We are a manufacturer with 7000-sqm factory and 100 employees.
2.Q: Can you provide the assembly drawing for confirmation ?
A: Yes, we can give the relavant drawing within 24 hours.
3.Q: Can you do non destructive test for valve components ?
A: Yes, we can perform radiographic testing, penetration testing, ultrasonic testing, magnetic particle testing, etc
4.Q: How can I vist you when I am in China?
A: We are near the Wenzhou Airport. If you take a plane, it takes 2 hours to reach our factory from Shanghai, 2 hours from Guangzhou, 3 hours from Beijing.
5.Q: Can we take sample for quality check?
A: Definitely. You can advise the model number and we will prepare the sample within 7 days.
6.Q: How can I become your distributor or agent?
A: You can send your company profile and reference list to our sales manager.
7.Q: Can you help with site maintenance and commissioning?
A: Yes, we are glad to offer our assistance whenever you need it. We can send our after sales team to address the issue within 4 days
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