Features of Forged Steel Fully Welded Ball Valves

　　Forged steel fully welded ball valves are mainly used in the pipelines of various systems of thermal power plants to cut off or connect pipeline media. Applicable media: water, steam and other non-corrosive media. Compared with other valve products, forged steel valves are characterized by high temperature and high pressure, unique self-sealing design, and the higher the pressure, the more reliable the seal. Due to the special performance, technical characteristics and operating conditions, the product also has characteristics that cannot be replaced by other products.

　　Forged steel valves often neglect the issue of grease injection volume. After the grease gun is refueled, after the operator selects the valve and grease connection method for the low-temperature shut-off valve, the grease injection operation is performed. There are two situations with forged steel gate valves: on the one hand, the grease injection volume is small and insufficient, and the sealing surface wears out faster due to lack of lubricant. On the other hand, excessive grease injection causes waste. This is because the sealing capacity of different valves is not accurately calculated according to the type and category of the valve. The sealing capacity can be calculated according to the valve size and category, and then the appropriate amount of grease can be reasonably injected.

　　Maintenance of Forged Steel Fully Welded Ball Valves

　　Ball valves are generally in the open position during maintenance and保养; in special cases, they are closed for maintenance. Other valves cannot be generally considered to be in the open position.

　　For forged steel extended end gate valves, the alignment of the valve bore and the sealing ring seat should be observed. For example, for ball valves, if there is excessive opening, the opening limiter can be adjusted inward, and after confirming that the bore is straight, it can be locked. The limit adjustment should not only pursue the position of opening or closing, but also consider the overall situation. If the opening is flush and the closing is not in place, it will cause the valve to not close tightly. Similarly, when adjusting the closing position, the corresponding opening adjustment should also be considered. Ensure the right-angle stroke of the valve. After grease injection, be sure to seal the grease injection port. Prevent impurities from entering, or oxidation of grease at the grease injection port. The cover should be coated with anti-rust grease to prevent rust. For use during the next operation.

　　Forged steel low-temperature valves should consider specific problems and specific treatments in future oil product sequential transportation. In view of the different qualities of diesel and gasoline, the scouring and decomposition capabilities of gasoline should be considered. In future valve operations, when encountering gasoline section operations, add grease in time to prevent wear and tear. When injecting grease, do not ignore the grease injection of the valve stem. The valve shaft part has a sliding bushing or packing, and it also needs to maintain a lubricating state to reduce the frictional resistance during operation. If lubrication cannot be ensured, the torque will increase when the electric operation wears parts, and the manual operation will be laborious to switch.

　　Some ball valves have arrows marked on the valve body. If there is no English FIOW marking, it indicates the direction of the sealing seat, not as a reference for the flow direction of the medium, and the self-leakage direction of the valve is opposite. Under normal circumstances, double-seat sealed ball valves have bidirectional flow.

　　During valve maintenance, attention should also be paid to the problem of water entering the electric head and its transmission mechanism. Especially rainwater seeping in during the rainy season. First, it causes the transmission mechanism or transmission bushing to rust, and second, it freezes in winter. This causes excessive torque during the operation of the electric valve, and damage to the transmission components will cause the motor to be unloaded or the over-torque protection to trip, making electric operation impossible. Damage to the transmission components also prevents manual operation. After the over-torque protection action, manual operation is also impossible. If forced operation is performed, the internal alloy components will be damaged.

　　Steel and iron are both alloys based on iron and with carbon as the main additive element, collectively known as iron-carbon alloys.

　　Putting cast iron in a smelting furnace for smelting will produce cast iron (liquid). Pouring the liquid cast iron into castings will produce cast iron parts. This cast iron is called a cast iron part.

　　What is the difference between cast steel and carbon steel? First, steel is classified according to its chemical composition.

　　(1) Carbon steel: a. Low carbon steel (C≤0.25%); b. Medium carbon steel (C≤0.25~0.60%); c. High carbon steel (C≤0.60%).

　　Steel is classified by forming method: (1) Forged steel; (2) Cast steel; (3) Hot-rolled steel; (4) Cold-drawn steel.

　　US standard forged steel fully welded ball valve parameters:

　　Nominal Pressure: 150LB-2500LB

　　Applicable Temperature: -29℃-200℃

　　Operation Method: Manual, worm gear, electric, pneumatic, pneumatic-hydraulic联动, etc.

　　Application Range: Natural gas pipelines, heating, heating pipelines, long-distance oil transportation, chemical pipelines

　　Media Used: Water, natural gas, coal gas, chemical products, etc.

　　Manufacturing Cycle: 8-10 days. Because it is a forged steel valve, it must be customized, so the delivery time is relatively long.

　　Application Industry: US standard forged steel fully welded ball valves are widely used in: urban gas, urban heating, petrochemicals, shipbuilding, steel, pressure regulating stations, power plants and other types of pipeline equipment.

　　Features of US Standard Forged Steel Fully Welded Ball Valves:

　　1. The valve body adopts an integral forging, ensuring that there are no quality problems such as sand holes.

　　2. Forged steel material manufacturing is more reliable, and mechanical integral welding is leak-proof.

　　3. The processing precision of the ball is very precise, the operation is convenient, and the ball can be customized according to customer requirements.

　　4. For the specific dimensions of US standard forged steel fully welded ball valves, customers can provide drawings and process them according to customer drawings.

　　5. The valve seat is also made of forgings, and the seal can be nylon, PPL, hard seal, etc., and the valve seal can be customized according to requirements.

　　6. Under the conditions of correct selection, normal operation, and maintenance of US standard forged steel fully welded ball valves, the service life is longer than that of ordinary ones. The number of switching times can reach tens of thousands of times, and the longest service life can be up to 20 years.

　　Applications of US Standard Forged Steel Fully Welded Ball Valves:

　　City gas: especially in the main pipelines and high-pressure pipe networks as the main switch of the entire pipeline.

　　Central heating: output pipelines, main lines, and branch lines of large heating equipment.

　　Heat exchangers: pipelines and the opening and closing of various circuits, with relatively small use diameters.

　　Steel plant: various fluid pipelines, exhaust gas discharge pipelines, coal gas and heat supply pipelines, etc.

　　Various industrial equipment: various heat treatment pipelines, or some gas, coal gas company's main pipelines or high-pressure pipelines.