| Customization: | Available |
|---|---|
| Media: | Water |
| Material: | Carbon Steel |
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Large-diameter forged steel ball valves are mainly used on pipelines in various systems of thermal power stations to cut off or connect pipeline media. Applicable media: water, steam and other non-corrosive media. Compared with other valve products, the characteristics of forged steel valves are high-temperature forged steel and unique self-sealing design. The higher the pressure, the more reliable the sealing. Due to the special performance, technical characteristics and working conditions, the product also has characteristics that cannot be replaced by other products.
Large-diameter forged steel ball valves are mainly used on pipelines in various systems of thermal power stations to cut off or connect pipeline media. Applicable media: water, steam and other non-corrosive media. Compared with other valve products, the characteristics of forged steel valves are high-temperature forged steel and unique self-sealing design. The higher the pressure, the more reliable the sealing. Due to the special performance, technical characteristics and working conditions, the product also has characteristics that cannot be replaced by other products. The amount of grease injected into large diameter forged steel ball valves is often overlooked. After the grease gun is refueled, the operator selects the valve and grease injection connection method for the low-temperature stop valve and then carries out the grease injection operation. There are two situations in forged steel gate valves: on the one hand, the amount of grease injected is small and insufficient, and the sealing surface wears faster due to lack of lubricant. On the other hand, excessive fat injection causes waste. The reason is that there is no calculation of different valve sealing capacities according to valve type categories. The sealing capacity can be calculated based on the size and type of the valve, and then the appropriate amount of grease can be injected reasonably.
2. Maintenance
Ball valves are generally kept in the open position during maintenance. In special circumstances, they can be closed for maintenance. Other valves cannot be regarded as open.
For forged steel extended-end gate valves, it is necessary to observe the problem that the valve diameter is flush with the sealing ring seat. For example, in a ball valve, if there is opening interference, the opening limiter can be adjusted inward and locked after confirming that the diameter is straight. When adjusting the limit, don't just pursue the open or closed position, but consider the overall position. If the opening position is flush and the closing position is not in place, the valve will not close tightly. In the same way, when adjusting the closing position, the corresponding adjustment of the opening position should also be considered. Forged steel Forged steel ball valves ensure a right angle stroke of the valve. After grease injection, be sure to seal the grease injection port. To avoid the entry of impurities or the oxidation of the lipid at the grease injection port, the cover should be coated with anti-rust grease to avoid rust. So that it can be applied in the next operation.
Forged steel cryogenic valves should consider specific issues in the sequential delivery of oil products in the future and deal with them in detail. Given the different qualities of diesel and gasoline, the scour and decomposition capabilities of gasoline should be considered. In the future valve operation, when encountering gasoline section operations, replenish grease in time to prevent wear and tear. When greasing, do not ignore the greasing of the valve stem of large-diameter forged steel ball valves. There is a sliding bushing or packing on the valve shaft, which also needs to be kept lubricated to reduce frictional resistance during operation. If lubrication cannot be ensured, the torque will increase during electric operation and the worn parts will be difficult to open and close during manual operation.
Some ball valve bodies are marked with arrows. If there is no English FIOW wording, it is the direction of the sealing seat and is not used as a reference for the flow direction of the medium. The self-discharging direction of the valve is opposite. Typically, double-seat sealed ball valves have bidirectional flow.
When maintaining the valve, you should also pay attention to the water intrusion problem in the electric head and its transmission mechanism. Especially the rainwater that seeps in during the rainy season. One is that the transmission mechanism or transmission sleeve will rust, and the other is freezing in winter. Forged steel forged steel ball valves cause excessive torque during operation of the electric valve. Damage to the transmission components will cause the motor to be no-loaded or the over-torque protection will trip to prevent electric operation. The transmission parts are damaged and manual operation is impossible. After the over-torque protection action, manual operation is also unable to switch. Forcible operation will damage the internal alloy components.
Steel and iron are alloys based on iron with carbon as the main added element. They are collectively called iron-carbon alloys.
Smelting cast pig iron in an iron melting furnace to obtain cast iron (liquid), and pour the liquid cast iron into castings, which are called cast iron parts.
Technical parameters
What is the difference between cast steel and carbon steel for large diameter forged steel ball valves?
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 according to forming method:
(1) Forged steel; (2) Cast steel; (3) Hot rolled steel; (4) Cold drawn steel.
HD7s41X large-diameter accumulator hydraulically controlled slow-closing check butterfly valve product features:
According to the control system, it is divided into: heavy hammer locking type (S), heavy hammer automatic pressure maintaining type (B).
1. Mainly composed of four parts: valve body, transmission mechanism, hydraulic station, and electric control box.
2. The valve body is composed of valve body, butterfly plate, valve shaft, sealing components and other parts.
3. The transmission mechanism is mainly composed of hydraulic cylinders, rocker arms, supporting side plates, weights, levers, locking cylinders and other connecting and transmission parts. It is the main actuator for hydraulic power to open and close valves.
4. The hydraulic station includes oil pump unit, manual pump, accumulator, solenoid valve, relief valve, flow control valve, stop valve, hydraulic integrated block, fuel tank and other components.
5. The valve bodies adopt horizontal structure.
6. The valve shaft can be of long or short shaft structure.
7. In the hammer-type automatic pressure-maintaining system, the accumulator is used to compensate for the system pressure.
8. In the hammer-type pressure-maintaining locking system, the accumulator is used to compensate for the system pressure and to unlock the locking cylinder.
9. The transmission hydraulic cylinder is equipped with a fast closing time regulating valve, a slow closing time regulating valve and a fast and slow closing angle regulating valve.
10. The manual pump is used for system debugging and valve opening and closing under special working conditions.
11. The hydraulic station, electric control box and valve body can be installed as a whole or separately. Generally it is an integral installation.
12. The flow control valve is used to adjust the valve opening time.
13. The control characteristics of the electromagnetic reversing valve in the hydraulic system are generally positive-acting.
That is: when the solenoid valve is powered, the butterfly valve opens, and when power is lost, the butterfly valve closes; otherwise, it is a reaction type, that is, when the solenoid valve loses power, the butterfly valve opens, and when power is lost, the butterfly valve closes. The conventional matching electromagnetic reversing valve is a direct-acting type. If the reaction type is used, please specify it when ordering.
The heavy hammer type hydraulically controlled slow-closing check butterfly valve adopts a heavy hammer type closing valve, so it is named the heavy hammer butterfly valve. It is mostly used at the outlet of circulating water pumps and the inlet of hydraulic turbines. Kaihang Automation Technology Co., Ltd. is a professional manufacturer of hydraulically controlled butterfly valves. This product is a weight-type hydraulically controlled butterfly valve. The opening of the hydraulic-controlled butterfly valve is hydraulically driven with an oil pressure of 13-16MPa, which reduces the size of the relay. During the opening process, the weight is lifted at the same time, and the lifted weight is used to store energy. Close and cancel the accumulator tank. After opening, the lock is automatically put in. The hydraulic system automatically maintains pressure. The weight does not fall and the valve disc does not shake. No power oil source is required when closing, the locking pin is automatically released, and the machine is closed according to a predetermined program. It is simple and reliable, and greatly simplifies the hydraulic system. Using double eccentric/triple eccentric valve plate, the horizontally installed valve shaft is raised a certain distance on the center line of the pipeline, so that the water facing area of the lower half of the valve plate is larger than the upper half, and the dynamic hydraulic force can be used to help the valve close to reduce the The weight of the weight allows the hydraulic device, butterfly valve control cabinet, electrical automatic control box, relay, and control oil pipe to be compactly integrated with the valve with a simple structure and small size, without the need for additional configuration by the user. The valve can realize local control, remote control and linkage control, and can meet the requirements of unattended and few people on duty. It is an ideal new pipeline control equipment.
Heavy hammer type hydraulically controlled slow closing check butterfly valve
The reserved closing energy is the weight potential energy, which is divided into weight type automatic pressure-maintaining hydraulically controlled slow-closing check butterfly valve (referred to as weight-maintaining pressure type) and locking type heavy-hammer type automatic pressure-maintaining hydraulically controlled slow-closing check butterfly valve. (referred to as the weight locking type), the operating conditions mainly include centrifugal pump operating conditions, axial flow pump operating conditions and hydraulic turbine operating conditions, etc.
Operating conditions of valve-opening centrifugal pumps (including centrifugal mixed-flow pumps): Start the pump first, then open the valve after a predetermined time delay.
Open valve axial flow pump working condition (including axial flow mixed flow pump): the pump valve is opened at the same time, or the valve is opened to a certain angle first, and then the pump is started.
Operating conditions of the valve-opening turbine: first open the bypass valve to balance the pressure, then open the valve, and then open the turbine.
Various working conditions generally require the valve to be closed during shutdown or power outage.
Product features: Eccentric semi-ball Valve Model: PBQ9440F-16C
Material: carbon steel Connection type: flange Structure type: hemisphere
3C valve category: Industrial Nominal diameter: 1000mm Applicable medium: water
Pressure environment: normal pressure Working temperature: normal temperature Standard: national standard
Flow direction: One-way Drive method: Electric Parts and accessories: Actuator
Purpose: Flow control Type (channel position): Straight-through type Target: water
Specifications: DN1000
Electric large-diameter full-bore eccentric semi-ball valve products are divided into six series according to their uses: general valves, pipeline valves, special valves for slurry, special valves for gas, special valves for petrochemical industry, and special valves for pulverized coal injection. There are three types of transmission modes: manual, pneumatic and electric, eight pressure levels (PN0.25~10.0Mpa) and hundreds of specifications (40~1000) of semi-ball valve products. In petroleum, chemical industry, metallurgy, electric power, gas and other industries, it is an updated product of gate valves, globe valves, Y-type valves and ball valves. At present, it has been widely used in pulverized coal injection in the steel industry, slurry, mother liquor and alumina powder transportation in the alumina industry, hydraulic (or dry) ash removal in the power industry, petrochemical industry, gas industry and other occasions.
Scope of application of electric large-diameter full-bore eccentric semi-ball valve
Universal valve: reasonable design, compact structure, small flow resistance, good sealing, light and flexible operation, especially suitable for low-pressure pipe networks of water, sewage, steam, pulp and other media, can be equipped with electric and pneumatic devices, and can realize long-distance automation operate. (Water, steam, sewage, pulp, mud and other non-corrosive media)
Special for pulverized coal injection: Ideal equipment for controlling pulverized coal injection of dust-containing gases and granular fluids and other solid transportation. It is widely used in blast furnace pulverized coal injection, pulverizing systems and dust removal in metallurgy, mineral processing, electric power and other production processes. Various pipeline controls in the system. It adopts a straight-through structure, the flow channel is smooth, and there will be no dust accumulation and blockage. The sealing pair is made of Co-Cr-W alloy. After special heat treatment, the valve is resistant to erosion and wear. At the same time, the eccentric spherical surface of the valve has automatic compensation performance. By adjusting the bolt on the worm gear, the sealing pair can still achieve re-sealing effect even if the sealing pair is worn to a certain extent. (Dust-containing gas, particulate fluid)
Uses of electric large-diameter full-bore eccentric semi-ball valve:
Special for petrochemical industry: For the petrochemical industry, which uses high pressure, high temperature, and is full of flammable, explosive, generally weak acid and weak alkali corrosive media, it has good sealing, corrosion resistance, easy opening and closing, and can automatically remove scaling on the valve surface. It is suitable for the transportation of crude oil, heavy oil and other media as well as petroleum cracking, food production and other processes. (Oil, natural gas, gas, water, etc.)
Special for blast furnace gas and natural gas: the sealing pair is made of Cr-Mn-Si cemented carbide, which is fire-proof, explosion-proof and anti-static. The sealing pair can withstand high temperatures of 560°C. Its corrosion resistance and anti-seizure capabilities are more than 6 times that of stainless steel sealing pairs. It is especially suitable for use in Used for pipeline transportation and pressurized door stations of coal gas, coke oven gas, water gas, liquefied gas, and natural gas. (Blast furnace gas, natural gas, dusty gas, etc.)
Special for slurry mixed fluids: It is the most ideal process valve for transporting two-phase mixed fluid media in processes such as solution slurry and slurry ash that are prone to sedimentation, scaling, and crystallization. It can break through the obstacles of scale formation during closing and achieve smooth closing. It has a novel structure and unique design, and has the advantages of high efficiency, energy saving, good wear resistance, reliable sealing, light operation, rapid opening and closing, and long service life. (Transportation of particulate matter such as process slurry, slurry ash and slag)
Special for pipelines: It is a straight-through semi-ball valve with no diameter reduction. The valve body channel is connected to the pipe connected to the pipeline as a straight pipe. The cross-sectional area is equal and the resistance is less than the diameter reduction. Full opening and full closing can be achieved by turning 90 degrees, which is convenient for long valves. Distance pipeline transportation control. (Pulverized coal injection and gas transportation)
Electric full-bore eccentric semi-ball valve has the following advantages:
1. The side-mounted type has a compact structure and light valve weight, and is suitable for occasions where the valve installation space is required.
2. The fluid resistance is small, and its resistance coefficient is equal to that of a pipe section of the same length.
3. It has simple structure, small size and light weight.
4. It has a cutting function and can cut off debris (branches, textile bags, etc.) in the medium when closed.
5. Tight and reliable, the sealing surface material of the ball valve is widely made of plastic, which has good sealing performance and has also been widely used in vacuum systems.
6. It is easy to operate and opens and closes quickly. It only needs to be rotated 90° from fully open to fully closed, which is convenient for long-distance control.
7. It is easy to maintain. The ball valve has a simple structure and the sealing ring is generally movable, making it easy to disassemble and replace.
8. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes, it will not cause erosion of the valve sealing surface.
9. It has a wide range of applications, with diameters ranging from a few millimeters to several meters, and can be applied from high vacuum to high pressure. When the ball rotates 90 degrees, it should all present a spherical surface at the inlet and outlet, thus cutting off the flow.
| PN | DN | (mm)Dimensions | ||||||||||
| L | D | K | d | Y | b | Z-Φdo | Ws | Hs | Hw | Hd | ||
| 1.6MPa | 50 | 124 | 165 | 125 | 100 | - | 16 | 4-Φ18 | 230 | 164 | 260 | 310 |
| 65 | 145 | 185 | 145 | 120 | - | 18 | 4-Φ18 | 250 | 180 | 275 | 330 | |
| 80 | 165 | 200 | 160 | 135 | - | 20 | 8-Φ18 | 300 | 200 | 300 | 360 | |
| 100 | 194 | 220 | 180 | 155 | - | 20 | 8-Φ18 | 320 | 235 | 335 | 390 | |
| 125 | 210 | 250 | 210 | 185 | - | 22 | 8-Φ18 | 400 | 260 | 335 | 405 | |
| 150 | 229 | 285 | 240 | 210 | - | 24 | 8-Φ23 | 500 | 280 | 375 | 440 | |
| 200 | 243 | 340 | 295 | 265 | - | 26 | 12-Φ23 | 800 | 320 | 410 | 470 | |
| 250 | 297 | 405 | 355 | 320 | - | 30 | 12-Φ25 | 100 | 355 | 485 | 550 | |
| 300 | 338 | 460 | 410 | 375 | - | 30 | 12-Φ25 | 1200 | 400 | 530 | 595 | |
| 350 | 400 | 520 | 470 | 435 | - | 34 | 16-Φ25 | - | - | 580 | 650 | |
| 400 | 400 | 580 | 525 | 485 | - | 36 | 16-Φ30 | - | - | 650 | 730 | |
| 450 | 502 | 640 | 585 | 545 | - | 40 | 20-Φ30 | - | - | 710 | 790 | |
| 500 | 533 | 715 | 650 | 608 | - | 44 | 20-Φ34 | - | - | 760 | 840 | |
| 600 | 686 | 840 | 770 | 718 | - | 48 | 20-Φ41 | - | - | 870 | 960 | |
| 700 | 762 | 910 | 840 | 788 | - | 50 | 24-Φ41 | - | - | 910 | 1080 | |
| 800 | 864 | 1025 | 950 | 898 | - | 52 | 24-Φ41 | - | - | 935 | 1125 | |
| 900 | 914 | 1125 | 1050 | 998 | - | 54 | 28-Φ41 | - | - | 995 | 1255 | |
| 1000 | 1255 | 1170 | 1110 | - | 56 | 28-Φ48 | - | - | 1080 | 1385 | ||
| 1200 | 1485 | 1390 | 1325 | - | 58 | 32-Φ54 | - | - | 1175 | 1490 | ||
| 1400 | 1685 | 1590 | 1525 | - | 60 | 36-Φ54 | - | - | 1280 | 1565 | ||
| 2.5MP | 50 | 124 | 165 | 125 | 100 | - | 20 | 4-Φ18 | 230 | 164 | 260 | 310 |
| 65 | 145 | 185 | 145 | 120 | - | 22 | 8-Φ18 | 250 | 180 | 275 | 330 | |
| 80 | 165 | 200 | 160 | 135 | - | 22 | 8-Φ18 | 300 | 200 | 300 | 360 | |
| 100 | 194 | 230 | 190 | 160 | - | 24 | 8-Φ23 | 320 | 235 | 335 | 390 | |
| 125 | 210 | 270 | 220 | 188 | - | 28 | 8-Φ25 | 400 | 260 | 355 | 405 | |
| 150 | 229 | 300 | 250 | 218 | - | 30 | 8-Φ25 | 500 | 280 | 375 | 440 | |
| 200 | 243 | 360 | 310 | 278 | - | 34 | 12-Φ25 | 800 | 320 | 410 | 470 | |
| 250 | 297 | 425 | 370 | 332 | - | 36 | 12-Φ30 | 1000 | 355 | 485 | 550 | |
| 300 | 338 | 485 | 430 | 390 | - | 40 | 16-Φ30 | 1200 | 400 | 530 | 595 | |
| 350 | 400 | 555 | 490 | 448 | - | 44 | 16-Φ34 | - | - | 580 | 650 | |
| 400 | 400 | 620 | 550 | 505 | - | 48 | 16-Φ34 | - | - | 650 | 730 | |
| 450 | 502 | 670 | 600 | 555 | - | 50 | 20-Φ34 | - | - | 710 | 790 | |
| 500 | 533 | 730 | 660 | 610 | - | 52 | 20-Φ41 | - | - | 760 | 840 | |
| 600 | 686 | 845 | 770 | 718 | - | 56 | 20-Φ41 | - | - | 870 | 960 | |
| 700 | 762 | 960 | 875 | 815 | - | 60 | 24-Φ48 | - | - | 990 | 1080 | |
| 800 | 864 | 1085 | 990 | 930 | - | 64 | 24-Φ48 | - | - | 935 | 1125 | |
| 900 | 914 | 1185 | 1090 | 1025 | - | 66 | 28-Φ54 | - | - | 995 | 1255 | |
| 1000 | 1320 | 1210 | 1140 | - | 68 | 28-Φ58 | - | - | 1080 | 1385 | ||
| 1200 | 1520 | 1420 | 1350 | - | 72 | 32-Φ58 | - | - | 1175 | 1490 | ||
| 1400 | 1755 | 1640 | 1560 | - | 78 | 36-Φ65 | - | - | 1280 | 1565 | ||
Export wooden box packaging
We are the source factory. Welcome to visit and inspect in person. Our main products are,Eccentric semi-ball valve, forged steel ball valve, hard-touch hard-spin ball valve, hard-sealed ball valve, American standard ball valve, hydraulic-controlled eccentric semi-ball valve, hydraulic-controlled butterfly valve, hydraulic-controlled actuator, hydraulic station, etc. The sealing surface material includes soft seal and hard seal, and the operating modes include: manual, worm gear drive, pneumatic, electric, hydraulic and other product fields.
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