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Shanghai Yiqiao International Trade Co., Ltd
Room 201, Building A, No. 66 Shahe Road, Jiangqiao Town, Jiading District, Shanghai
AVTRON HS35M12509WPU0GA00S1
QUIRI oil cylinder HLXF21GX-191201/150
BRUCKNER-0006 2804.32V-160
HYDAC SB330-2.5A1/112U-330A (imported)
PINTER MV3000-BVR-6-ED013 2 Pre fabricated power supply and
GEORGIN-0038 FP6SX
German ELSTER-0006 GA0-A4-4-6 14Y2 pressure switch
SSB FSDPI-0314.06160.00
HYDAC sensor EDS344-3-250-000
STROMAG cam switch 51_48-BM-899 cam plate angle 30 ° x6 pieces, 45 ° x2 pieces
BENDER Measured current transformer W35AB
TWK encoder CRN66-8192R096D1Z01
MICRO TECTECTORS light curtain BX80S/10-0H
IWAKI MD-15FX-220N VOLTAGE:220/240V
HERZOG sample clamp body HS-CF 8-2762-355684-2
EUCHNER EKS-A-K1GNWT32-EU
RSFELEKTRONIK grating ruler MSA 671.73 ML 820mm R1 14
CEMB-0007 CU-02
BINDER MAGNETIC AL38AT 5-0/15-2
PAULY sensor RH400 M2051
EBMPAPST A4D300-AP34-14
CARPANELLI-0009 M106B6 1.84KW 940r/min
LEESON electrical component C184T17DB44B 131520.00
VICKERS RELIFFVALVE pressure reducing valve CG-10-30
REXROTH 阀 3 DR3U10EP5-61/100Y6EG24N9K4/00M
HERION 0880300(NKE-005.000057)
DYNISCO model: MDT462F-1/2-5C-23/46-B171-A
DOPAG-0007 401.04.95(0.14677)
VOITH-0003 0-100℃/L=100 d=10
AVTRON AV685N1T89XXY02A
XS BYH2277-03-01-00
E+H spare parts FMR250-AEE1GGJAA2K
BUCHER MTDA08-008M RSM 0510289-01
BELLOFRAM-0001 VJB25A-212DEX(-24V150-900KPA)
BECKHOFF Passive Adapter CX1900-0101
WEIGEL and WEIGEL-0347 instruments,
HYDAC sensor HDA3840-A-250-124 (10M)
HAHN+KOLB spare parts 52736100
EMG SIM-SE/500/2100/1500/500
HYDAC differential pressure transmitter VD 5LZ.1/-BO-LED 1276537
ROHM 1831050
ERHARD-0009 WORK-NR8631248
PROMINENT model: S3CAH070580PVT0110WA0P00C
Relay IPN-160/A
MTS-0059 RHM0530MP151S1G5100
DUSTERLOH PMW250Z24PFA200-ED 2010Z
HYDAC filter element 0250DN010BN4HC
DENISON model: C5V08 320 B1 026-71479-0
PHOENIX Switching Power Supply 2866381
TWK IW25A/100-0.25-KGM-KHN
SCHENCK V090162.B01
STOBER-0036 K402AGD0200MQ40EL13
BEDIA pressure switch 420161
PHOENIX 2740436
BRINKMANN 泵 STA303/370+001 0612005387-96083001
STOBER-00691 EK502VSOM140-IMVI-90-LSIDE
NORELEM spare parts NLM 03320-0824
German BERTHOLD-0081 LB444 Range: 1.0-2.0g/Cm3 Output
KRAUS&NAME CHR11J-0445
SSB DAP-0350.06222.00-B14
FLUID TEAM-0008 EEPDRDM3-05-70-1-12V/3121
AMISCO 阀 EVI 7/9 AC220V 6VA
KUBLER 8.5020.0821.1024.0008
STROMAG CSZSL2154-M5237/MSB000 00790048
BEDIA 420737
AC-MOTOREN FOM 160MA-4 No:03040186
CELESCO Miniature Displacement Sensor PT1DC-30-FR-Z10-MC4-SG
STROMAG clutch UNNA 269257 EKE67
ELETTA Monitor S25-PC03250-43C/RL
WBS-0003 26/24-20.5 rot 70oWEBER-0001
VICKERS KBFDG5V-7-33C160N-EX-M2-PE7-H1
NEXEN clutch P/N: 810065
GRACO GG0635HAHN+KOLB spare parts 52736100
EMG SIM-SE/500/2100/1500/500
HYDAC differential pressure transmitter VD 5LZ.1/-BO-LED 1276537
ROHM 1831050
ERHARD-0009 WORK-NR8631248
PROMINENT model: S3CAH070580PVT0110WA0P00C
HYDAC filter element 1300R010BN3HC
LENSES E82ZZ22234B200
IPF magnetic switch MZR0120 magnetic switch
DOPAG-0093 6 Dispelling nonreturn from Germany
PILZ relay PNOZ X2
SIEMENS motor 2CF6350-1EC00-4DH5
MOORE 型号: ECT/0-5AAC/4-20MA/24VDC/-RF/[DIN]
KROM burner controller IFS110 IM-5/1/1T GAS FIRING AUTOMATE 230V
BROOK CROMPTON TYP:7-D250S SER NO:GE801458 55KW
MTS sensor RHM0225MD631P102
FOERSTER-0001 PK80/10/115 6.782.05-6732
VIPA CPU module CPU315SN/315-4NE12
BERARMA-0005 02-PVS1-16B-H-R-M
CEMA-0002 handle switch 4-position 077MT1234S22
BINDER OMW 516004 230VAC 8x1.2MM
HYDAC 0660 R 005 BN4HC
Italy COREMO-0092 MPA-A2916
SUDMO lining spare parts SUDMO lining spare parts
A valve is a control component in a fluid delivery system, which has functions such as shut-off, regulation, diversion, prevention of backflow, stabilization, diversion, or overflow pressure relief.
Valves used in fluid control systems, ranging from globe valves to various valves used in extremely complex self-control systems, have a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. Valves can be divided into cast iron valves, cast steel valves, stainless steel valves (201, 304, 316, etc.), chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, duplex steel valves, plastic valves, non-standard customized valves, etc. according to their materials.
Definition: It is a device used in fluid systems to control the direction, pressure, and flow rate of fluids. A valve is a device that enables the flow or cessation of media (liquids, gases, powders) in piping and equipment, and controls their flow rate. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media.
Valves are control components in pipeline fluid transportation systems, which are used to change the cross-sectional area of the passage and the direction of medium flow. They have functions such as diversion, cutoff, throttling, check, diversion, or overflow pressure relief. Valves used for fluid control range from globe valves to various valves used in extremely complex self-control systems, with a wide variety of varieties and specifications. The nominal diameter of valves ranges from extremely small instrument valves to industrial pipeline valves with a diameter of up to 10m. Valves can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals, and radioactive fluids. The working pressure of valves can range from 0.0013MPa to 1000MPa ultra-high pressure, and the working temperature can range from -269 ℃ ultra-low temperature to 1430 ℃ high temperature. The control of valves can adopt various transmission methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic hydraulic, electro-hydraulic, pneumatic hydraulic, spur gear, bevel gear drive, etc; Under the action of pressure, temperature or other forms of sensing signals, the valve can act according to predetermined requirements, or perform simple opening or closing without relying on sensing signals. The valve relies on driving or automatic mechanisms to make the opening and closing parts move up, down, slide, swing or rotate, thereby changing the size of its flow channel area to achieve its control function.
Folding edit this section of history
Valves are produced with the generation of fluid pipelines. Humans have been using valves for nearly 4000 years. In ancient China, when extracting brine from salt wells to produce salt, wooden plug valves were used in bamboo pipelines. In 1800 BC, when the ancient Egyptians built large-scale water conservancy projects to prevent flooding of the Nile River, they also used similar wooden plugs to control the distribution of water flow. These are the prototypes of valves. The widespread application of industrial valves began after Watt invented the steam engine. At the beginning of the 20th century, valves made of various materials such as cast iron, cast steel, forged steel, stainless steel, chromium molybdenum steel, brass, etc. appeared. Applied to various industries and working conditions. There were not many companies in China that first introduced foreign valve production technology. Later, the introduction of foreign production technology led to breakthroughs in domestic valve production technology, improved quality, and extended lifespan.
According to the "Bottleneck of Competitive Development in China's Valve Industry in 2013", with the acceleration of the restructuring of the valve industry, the future industry will be a competition between valve product quality and safety, and product brands. Products will develop towards high technology, high parameters, strong corrosion resistance, and high service life. Only through continuous technological innovation, development of new products, and technological transformation can the product technology level be gradually improved to meet domestic equipment requirements and fully realize the localization of valves. Under the huge demand environment, China's valve manufacturing industry is bound to present better development prospects.
At present, the transaction volume of China's valve market is as high as about 50 billion yuan, which fully demonstrates the development scale and momentum of China's valve industry. However, against the backdrop of a favorable industrial situation, there are also some issues that are worth worrying about, especially in China where valve enterprises are mainly low-level, small-scale, and family workshop style enterprises. This is a significant limitation and bottleneck for the future development of China's valve industry.
At present, domestic valve production backbone enterprises are able to design and manufacture various valves in accordance with international standards such as ISO international standards, DIN German standards, AWWA American standards, and some manufacturers' products have reached the level. Although the overall level of the valve industry has improved significantly during the Chinese New Year, the quality is still not stable enough, and phenomena such as running, emitting, dripping, and leaking often occur in domestic valves.
In addition, there is still a certain gap in the matching capacity of valves in China compared to developed countries. The competition in the valve market is becoming increasingly fierce, and the market for some ordinary valve products has become saturated, with supply exceeding demand, making it increasingly difficult for small and medium-sized enterprises to develop. Even high-tech products compete fiercely in the international market.
In the valve market, China can already provide heating valves, environmental protection valves, building valves, etc., with a wide variety of products.
The current technical level of folding editing in this paragraph
In the era of financial crisis, the world economy is gradually recovering, and the import and export market of Chinese valve and electromechanical products is also steadily growing. The international competition in the valve industry will become more intense. The main gap between Chinese valve manufacturers and foreign large valve manufacturers lies in technology. The innovation and improvement of product technology have become a major obstacle to the rapid development of Chinese valve products.
Valves are an important fluid control equipment in industry, involving many sectors of the national economy, and are an important basic equipment for the development of the national economy. After decades of development, China's valve products have formed more than ten categories, especially in terms of the number of enterprises and production and sales volume, ranking among the top in the world. However, most of them are small-scale, low-level valve enterprises, and their products are mainly in the mid to low end.
Since the reform and opening up, the valve market has rapidly expanded, and state-owned enterprises have encountered the crisis of closure and merger due to the influence of the system. Township and private enterprises, due to limited technical strength, can only imitate production, which is the main reason for the low quality of domestic valves. The country has introduced policies to revitalize the equipment manufacturing industry, with a particular focus on supporting the development of general basic manufacturing. China is facing a transition from the agricultural era to the industrial era, which will significantly increase the demand for valve products in the industry. The support of national policies and the huge demand in the product market will be the driving force for the rapid development of the valve industry.
Market analysts believe that the development trend of valves will be the main topic of the market for a considerable period of time. The future trend will be towards the development and application of the following aspects.
Firstly, develop high-performance hydraulic control valves, such as those with high discharge capacity, high sensitivity, corrosion resistance, friction resistance, and zero leakage. Develop hydraulic control valves with integrated technology, electronic computer technology, and high monitoring technology. Develop products with good operational feasibility, high safety, and comfort.
Secondly, develop high-performance large-scale regulating valves to meet the needs of major engineering projects in China, develop micro regulating valves to meet the needs of narrow operations such as trenching and cable laying, and develop new types of regulating valves that meet the needs of power stations, petroleum, coal, water conservancy, farmland, and urban construction; Develop intelligent electric control valves that can monitor, control, and improve the working conditions of operators under various operating conditions. Promising products include large and medium-sized intelligent electric control valves, miniature intelligent electric control valves, and remote-controlled intelligent electric control valves.
In addition, we will develop high-level products with high safety, high feasibility, and good performance, develop large-scale integrated valves equipped with advanced electronic technology, and develop deformed products towards universalization, standardization, and serialization.
Experts point out that the application of various agricultural greenhouse films, plastic films, agricultural water-saving valve equipment and other valve pipelines in modern agriculture is widely used, and the application of rural valve pipelines is also increasing. Just solving the demand for valve pipes for human, animal and water engineering is quite considerable. The demand for various valves and pipelines in urban buildings has also increased significantly. The automotive manufacturing industry is increasingly using valves to manufacture automotive components. The average number of valves used in power stations in developed countries has exceeded 10 billion, while the average usage of power station valves in China is 7 billion. All of these have stimulated the market demand for the valve industry.
The Chinese valve manufacturing industry has been able to provide approximately twelve categories, over 3000 models, and more than 4000 specifications of products for user departments, with performance parameters ranging from vacuum valves to 1000Mpa ultra-high pressure valves, and temperatures ranging from cryogenic -196 degrees Celsius to high temperatures of 570 degrees Celsius. The main products of Chinese valves can basically meet the needs of the domestic market, and the complete set rate, level, and capability of the valve market have been greatly improved. Domestic valves have a certain foundation for revitalization.
However, the valve industry in China is still dominated by small and medium-sized enterprises, and the Chinese valve manufacturing industry is bound to present better development prospects in the huge demand environment.
According to the "Analysis Report on the Demand Status and Prospects of China's Valve Industry Application Market" released by the Forward Industry Research Institute, from January to November 2007, the manufacturing industry of valves and plugs in China achieved a cumulative industrial output value of 84288398 thousand yuan, an increase of 31.47% over the same period last year; Accumulated product sales revenue of 80571055 thousand yuan, an increase of 29.36% compared to the same period last year; The total accumulated profit reached 5772097 thousand yuan, an increase of 44.16% compared to the same period last year.
From January to August 2008, the manufacturing industry of valves and plugs in China achieved a cumulative industrial output value of 73321603000 yuan, an increase of 27.02% compared to the same period last year; Accumulated product sales revenue of 70451147000 yuan, an increase of 27.27% compared to the same period last year; The total accumulated profit reached 4470009000 yuan, an increase of 15.37% compared to the same period last year. During the 11th Five Year Plan period and in the coming years, there will be a large demand for valves in various industries in China, such as petrochemicals, natural gas, metallurgy, electricity, and urban construction. Forward looking Network predicts that the total demand for valves in China will reach 34.5 billion yuan during the 11th Five Year Plan period. Therefore, the valve industry has huge market development space.
(1) Cut off type: such as gate valves, globe valves, plug valves, ball valves, butterfly valves, needle valves, diaphragm valves, etc. Cut off valves, also known as closed-circuit valves or globe valves, are used to connect or cut off the medium in pipelines.
(2) Check valve: such as check valve, also known as one-way valve or check valve. Check valve is an automatic valve that prevents the backflow of medium in the pipeline, prevents the pump and drive motor from reversing, and prevents the leakage of container medium. The bottom valve of the water pump for suction closure also belongs to the category of check valves.
(3) Safety related: such as safety valves, explosion-proof valves, accident valves, etc. The function of a safety valve is to prevent the pressure of the medium in the pipeline or device from exceeding the specified value, thereby achieving the purpose of safety protection.
(4) Regulating type: such as regulating valves, throttle valves, and pressure reducing valves, whose function is to regulate the pressure, flow rate, and other parameters of the medium.
(5) Diversion type: such as distribution valves, three-way valves, and drain valves. Its function is to distribute, separate or mix the medium in the pipeline.
(6) Special purpose categories: such as cleaning valves, vent valves, drain valves, exhaust valves, filters, etc. Exhaust valve is an auxiliary component in pipeline systems, widely used in boilers, air conditioners, oil and gas, and water supply and drainage pipelines. Often installed at high points or bends to eliminate excess gas in pipelines, improve pipeline efficiency, and reduce energy consumption.
Folding classified by nominal pressure
(1) Vacuum valve: refers to a valve with a working pressure lower than the standard atmospheric pressure.
(2) Low pressure valve: refers to a valve with a nominal pressure PN ≤ 1.6Mpa.
(3) Medium pressure valve: refers to valves with nominal pressure PN of 2.5Mpa, 4.0Mpa, and 6.4Mpa.
(4) High pressure valve: refers to a valve with a nominal pressure PN of 10.0Mpa to 80.0Mpa.
(5) Ultra high pressure valve: refers to a valve with a nominal pressure PN ≥ 100.0Mpa.
(6) Filter: refers to valves with nominal pressure PN of 1.0Mpa and 1.6Mpa
Folding classified by working temperature
(1) Ultra low temperature valve: used for valves with medium working temperature t<-101 ℃.
(2) Low temperature valve: a valve used for medium working temperature -101 ℃ ≤ t ≤ -29 ℃.
(3) Room temperature valve: used for valves with medium working temperature -29 ℃<t<120 ℃.
(4) Medium temperature valve: used for valves with medium working temperature of 120 ℃ ≤ t ≤ 425 ℃
(5) High temperature valve: used for valves with medium working temperature t>425 ℃.
Folding classified by driving method
Classified by driving method, it can be divided into automatic valves, power driven valves, and manual valves:
(1) Automatic valve refers to a valve that does not require external force to drive, but relies on the energy of the medium itself to make the valve operate. Such as safety valves, pressure reducing valves, drain valves, check valves, automatic regulating valves, etc.
(2) Power driven valve: Power driven valves can be driven by various power sources. Divided into electric valves, pneumatic valves, hydraulic valves, etc. Electric valve: a valve driven by electricity. Pneumatic valve: a valve driven by compressed air. Hydraulic valve: a valve driven by the pressure of oil or other liquids.
In addition, there are combinations of the above driving methods, such as pneumatic electric valves.
(3) Manual valve: The manual valve is operated manually by hand using a handwheel, handle, lever, and sprocket. When the opening and closing torque of the valve is large, a gear or worm gear reducer can be installed between the handwheel and the valve stem. When necessary, universal joints and transmission shafts can also be used for remote operation.
Folding classified by nominal diameter
(1) Small diameter valve: valves with a nominal diameter DN ≤ 40mm.
(2) Medium diameter valve: a valve with a nominal diameter DN of 50-300mm.
(3) Large diameter valve: a valve with a nominal DN of 350-1200mm.
(4) Extra large diameter valve: a valve with a nominal diameter DN ≥ 1400mm.
Folding classified by structural features
The structural characteristics of valves can be divided into:
(1) Truncated gate shape: the closing element moves along the center of the valve seat; Like a shut-off valve
(2) Cock and ball: The closing component is a plunger or ball that rotates around its own centerline; Such as plug valves and ball valves
(3) Gate shaped: The closing component moves along the center of the vertical valve seat; Such as gate valves, gates, etc
(4) Spiral opening shape: the closing element rotates around the axis outside the valve seat; Such as rotary check valves, etc
(5) Butterfly shaped: a disc of closure that rotates around the axis inside the valve seat; Such as butterfly valves, butterfly check valves, etc
(6) Slide valve shape: The closing element slides in a direction perpendicular to the channel. Like a slide valve
Folding classified by connection method
(1) Threaded connection valve: The valve body has internal or external threads and is connected to the pipeline thread.
(2) Flange connected valve: The valve body is equipped with a flange and connected to the pipeline flange.
(3) Welded connection valve: The valve body has a welding groove and is welded to the pipeline.
(4) Clamp connected valve: The valve body has a clamp and is connected to the pipeline clamp.
(5) Card sleeve connected valve: It is connected to the pipeline using a card sleeve.
(6) Clamp connection valve: a connection form that directly clamps the valve and two ends of the pipeline together with bolts.
Folding by valve body material classification
(1) Metal material valve: Its valve body and other parts are made of metal materials. Such as cast iron valves, cast steel valves, alloy steel valves, copper alloy valves, aluminum alloy valves, lead alloy valves, titanium alloy valves, Monel alloy valves, etc.
(2) Non metallic material valve: Its valve body and other parts are made of non-metallic materials. Such as plastic valves, enamel valves, ceramic valves, fiberglass valves, etc.
(3) Metal lined valve body: The valve body is made of metal, and all major surfaces that come into contact with the medium inside are lined, such as rubber lined valves, plastic lined valves, ceramic lined valves, etc.