G2010 ball valve for long-distance pipeline is designed for the transportation of long-distance pipeline media, which is a typical long-distance pipeline ball valve, which is suitable for various oil, natural gas, city gas pipelines, and can also be used in the equipment of general chemical products. The valve fully meets the relevant provisions of the API6D specification of the United States Petroleum Institute in terms of performance. The size of the connection with the actuator conforms to the ISO 5211 specification, and can be easily combined with various actuators, with simple structure, superior performance, convenient maintenance, safety and reliability.
Structural features
1. Tight and reliable sealing structure
The valve seat structure is designed to be axial floating, and the sealing is completed by tension spring pre-pressure at low pressure, and the principle of piston effect is reasonably applied, and the medium pressure is used to automatically complete the reliable sealing at high pressure.
2. Fireproof structure
The product structure design conforms to the provisions of API6FA or API607, once a fire occurs or the abnormal temperature rises to soften and burn the valve seat, the metal support of the valve seat touches with the ball core, which plays a temporary sealing role, and the metal-to-metal hard sealing structure is selected between the main and auxiliary valve bodies to avoid the fire to disperse outward.
3. Emergency ambulance structure
When the valve seat is damaged and causes leakage, the sealing grease is injected through the grease injection valve, which can play a temporary sealing role, and the grease injection valve is equipped with a built-in check valve to avoid the sealing grease overflowing under the action of the medium, and the end of the grease injection valve is a joint for the quick connection of the grease injection valve.
4. Sealing structure between valve bodies
The sealing between the valve bodies relies on the double safety of O-ring and winding gasket to complete, and the metal-to-metal hard touch between the main and auxiliary valve bodies can be used together to avoid damage due to excessive tightening and deformation of the gasket, and can also avoid the change of valve operating torque caused by external force, so as to avoid leakage and fire dispersion at the moment of fire accident.
5. Anti-static structure
The structure of the valve can avoid the long-term conflict between the medium and the valve trim and the accumulation of static electricity and cause fire, explosion and other dangerous accidents.
6. Stem sealing and perfect protection measures
The sub-mother packing is selected, and the grease filling valve can be installed at the stuffing box according to the customer's requirements to inject the sealing grease to ensure that the seal has no leakage. The stainless steel packing box excludes the adverse effects of rusting of carbon steel parts on the packing, and the valve body and the actuator are directly connected without brackets, which completely excludes the external dust particles from entering the packing box, straining the valve stem, damaging the packing, and causing leakage.
7. Two-way cut-off and venting
When the valve is out of the fully open or fully closed position, the medium in the cavity of the valve body can be discharged through the sewage equipment, and the overpressure in the cavity of the valve body can also be automatically discharged to the low pressure side through the valve seat.
8. Various operation methods
The coupling dimensions of the valve body assembly to the actuator conform to ISO 5211 and can be easily combined with a variety of actuators. Commonly used drive methods are manual, pneumatic, electric, electro-hydraulic, etc.
9. Sewage and cavity cleaning
The lower part of the valve body is equipped with a blowdown valve, which can remove the stagnant water in the valve in time after the valve pressure test and inspection, so as to avoid the rust of the valve body. During the operation of the valve, the cavity of the valve body can be vented and cleaned.
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