Forged Steel Gate Valve Manufacturer shares this article for you.
Forged steel fully welded ball valves are mainly used in pipelines of various systems in thermal power stations to cut off or connect pipeline media. Applicable medium: non-corrosive medium such as water and steam. Compared with other valve products, Forged Steel Ball Valve is characterized by high temperature and high pressure, unique self-sealing design, the higher the pressure, the more reliable the seal. Due to the special performance, technical characteristics and working conditions, the product has formed characteristics that other products cannot replace.
Forged steel valves often overlook the issue of grease injection. After the grease injection gun is refueled, the operator selects the valve and the grease injection connection method for the low temperature stop valve, and then performs the grease injection operation. There are two types of forged steel gate valves: on the one hand, the amount of grease injection is small, and the grease injection is insufficient, and the sealing surface wears faster due to lack of lubricant. On the other hand, excessive grease injection causes waste. The reason is that there is no accurate calculation of the sealing capacity of different valves according to the valve type category. The sealing capacity can be calculated based on the valve size and type, and then a reasonable amount of grease can be injected.
Forged steel fully welded ball valve maintenance
The ball valve is generally in the open position during maintenance. In special cases, it is selected to close for maintenance. Other valves cannot be treated as open positions.
For forged steel extension gate valves, observe the problem that the valve diameter is flush with the sealing ring seat. For example, for ball valves, if there is an open position interference, the open position limiter can be adjusted inward to confirm that the diameter is straight and locked. Adjusting the limit can not only pursue the opening or closing position, but should be considered as a whole. If the opening position is flush and the closing position is not in place, the valve will not close tightly. In the same way, if the adjustment is in place, the adjustment of the opening position should also be considered. Ensure the right angle travel of the valve. After grease injection, the grease injection port must be sealed. Avoid the entry of impurities, or the oxidation of lipids at the grease injection port, and the cover should be coated with anti-rust grease to avoid rust. So that it can be applied in the next operation.
Forged Steel Ball Valve
Forge Steel Globe Valve should consider the specific treatment of specific problems in the order of oil products in the future. In view of the different qualities of diesel and gasoline, the scour and decomposition ability of gasoline should be considered. In the future valve operation, when encountering gasoline section operations, replenish grease in time to prevent wear. When injecting grease, do not ignore the grease injection at the valve stem. There is a sliding sleeve or packing on the valve shaft, which also needs to be kept lubricated to reduce the frictional resistance during operation. If lubrication cannot be ensured, the torque will increase during electric operation and wear parts will be laborious during manual operation.
Some ball valves are marked with arrows. If there is no English FIOW writing, it is the direction of the seal seat, not as a reference for the flow of the medium, and the valve self-venting direction is opposite. Normally, a double-seat sealed ball valve has a bidirectional flow direction.
When maintaining the valve, pay attention to the water ingress in the electric head and its transmission mechanism. Especially in the rainy season the infiltration of rainwater. One is to rust the transmission mechanism or the transmission shaft sleeve, and the other is to freeze in winter. The torque is too large when the electric valve is operated, and the damage to the transmission components will cause the motor to be unloaded or the over-torque protection will trip and electric operation cannot be realized. The transmission parts are damaged and manual operation cannot be performed. After the over-torque protection is activated, the manual operation cannot be turned on and off. Forcible operation will damage the internal alloy parts.
Both steel and iron are alloys based on iron and carbon as the main additive element, collectively referred to as iron-carbon alloys.
The cast iron is smelted in an iron melting furnace to obtain cast iron (liquid), and the liquid cast iron is cast into castings, which are called cast irons.
What is the difference between cast steel and carbon steel. First, steel is classified by 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 according to the forming method: (1) Forged steel; (2) Cast steel; (3) Hot rolled steel; (4) Cold drawn steel.
Parameters of forged steel fully welded ball valve:
Nominal pressure: 150LB-2500LB
Applicable temperature: -29℃-200℃
Operation mode: manual, worm gear, electric, pneumatic, gas-liquid linkage, etc.
Scope of application: natural gas pipelines, heating, heating pipelines, long-distance petroleum, chemical pipelines
Use medium: water, natural gas, coal gas, chemical products, etc.
Manufacturing cycle: 8-10 days. Because the valve is made of forged steel, it must be customized, so the delivery time is relatively long
Application industry: Forged steel fully welded ball valves are widely used in: urban gas, urban heating, petrochemical, shipbuilding, steel, pressure regulating stations, power plants and other pipeline equipment
Features of forged steel fully welded ball valve:
1. The valve body adopts integral forgings to ensure that there will be no quality problems such as trachoma
2. Forged steel material manufacturing performance is more reliable, and there is no leakage through mechanical integral welding
3. The processing accuracy of the sphere is very precise and easy to operate. The sphere can be customized according to customer requirements
4. For the specific dimensions of the forged steel fully welded ball valve, customers can provide drawings and process them according to customer drawings
5. The valve seat is also composed of forgings, and the seal can be nylon, PPL, hard seal, etc., and the valve seal can be customized according to requirements
6. The forged steel fully welded ball valve has a longer service life than ordinary ones under the condition of correct selection, normal operation and maintenance. The number of switching times can reach tens of thousands of times, and the longest service life can reach more than 20 years.
Application fields of forged steel fully welded ball valve:
City gas: It is used as the main switch of the entire pipeline, especially in main lines and high-pressure pipeline networks.
Centralized heating: output pipelines, main lines and branch lines of large heating equipment.
Heat exchanger: The pipeline and each circuit are opened and closed, with a relatively small diameter.
Steel plant: various fluid pipelines, exhaust gas selective discharge pipelines, gas and heat supply pipelines, etc.
Various industrial equipment: various heat treatment pipelines, or main pipelines or high-pressure pipelines of some gas and gas companies.