First, the gate valve 1, the structural view of a conventional gate valve 2, the valve is characterized by valve means to move the shutter in the vertical direction centerline of the valve passageway. The main valve in the pipeline for cutting. Valve is used very widely used as a valve, cutting device generally caliber DN≥50mm have chosen it, and sometimes a small caliber cutting device also use the valve, the valve has the following advantages: ① fluid resistance. ② less force required to open and close. ③ medium flows unrestricted. ④ When fully open, the sealing surface by erosion of the working medium is smaller than the cut-off valve. ⑤ relatively simple shape, good casting process. Valve also has shortcomings: ① dimensions and opening height are larger. Larger space required for installation. ② opening and closing process, the relative friction between the sealing surface, easy to cause abrasions. ③ valve generally has two sealing surface, to machining, grinding and repair some additional difficulties. 3. The classification of a gate valve. The structure can be divided according to ram a) parallel gate valve: sealing surface and the vertical centerline parallel, that is, two valve sealing surfaces parallel to each other. As shown in parallel gate valve, a sub-single gate and double plate, with a thrust wedge structure is most common, both in the middle of a two-sided thrust wedge gate, the gate valve is suitable for small and medium-caliber Low (DN40-300mm) gate. Also with a spring in between the two gate, to the clamping force of the spring can produce beneficial gate seal. 2) wedge gate valve: sealing surface and the vertical centerline into some sort of angle, that is, two sealing surface into wedge gate valves. The inclination angle of the sealing surface are generally 2 ° 52 ', 3 ° 30', 5 °, 8 °, 10 °, etc., the size of the angle depends on the medium temperature level. Generally, the higher operating temperature, the greater the angle should be taken to reduce the likelihood of wedged temperature changes occur. In the wedge gate valve, a further single gate, double plate and the flexible gate points. Single wedge gate valve, simple structure, reliable operation, but higher on the sealing surface angle accuracy requirements, processing and maintenance more difficult, the possibility of temperature changes wedged great. Double plate wedge gate valve to use more water and steam in the media line. Its advantages are: the lower the angle of the sealing surface accuracy, temperature changes are unlikely to cause wedged phenomenon, when the sealing surface wear, you can add shim compensation. But this structural parts are more easily bonded viscous medium, affect the seal. But mainly on the lower bezel is easy to produce long-term corrosion, gate easily. Resilient wedge gate valve, which has a single wedge gate valve structure is simple, reliable advantages, but also produce small amounts of elastic deformation deviation compensate sealing surface angle generated during processing and improve manufacturability, has been widely adopted . (Clear shot valve) (dark bar gate) 2. Press the valve stem structure can be divided into 1) rising stem gate valve: the valve stem nut cover or stand on, when opening and closing the gate, with a rotary valve stem stem nut to achieve lift. This structure of the valve stem lubrication Advantageously, the closing level significantly, so it is widely used. 2) dark bar valve: the valve stem nut body, direct contact with the media. When opening and closing the gate, the rotary valve stem to achieve. The advantage of this structure are: the total height of the gate remains unchanged, so a small installation space, suitable for large diameter or restricted valve installation space. Such structure should be equipped with open and close indicator to indicate the degree of opening and closing. The disadvantage of this structure are: stem thread lubrication is not only impossible, but also directly accept the medium erosion, easy to damage the stainless steel flange gate valve Z41W-16P Name: flange valve | stainless steel flange gate valve Model: Z41W-10P / Z41W-16P / Z41W-25P / Z41W-40P / Z41W-64P / Z41W-100P / Z41W-160P Z41H | Y -10P / Z41 H | Y-16P / Z41 H | Y -25P / Z41 H | Y -40P / Z41 H | Y -64P Z41W-150LB / Z41W-300LB / Z41W-600LB / Z41W-900LB Z41W-5K / Z41W-10K / Z41W-20K / Z41W-45K / Z41W-65K optional actuators: manual, bevel gear, worm gear, pneumatic , electric, hydraulic related products: flange valve | Stainless steel flange valve | American Standard flange valve | Wenzhou flange valve | electric gate valve flange connection: flange / welding / butt / socket weld / male / thread / wire port / threaded valve material: stainless steel / 304/316 stainless steel / 304L Stainless Steel / 316L stainless steel / 321 stainless steel / 310S stainless steel / CF8 stainless steel / CF8M Stainless / CF3 stainless steel / CF3M stainless steel, stainless steel, cast steel, carbon steel, WCB steel, LCB low carbon steel, titanium, pure nickel, pure chromium, chromium molybdenum steel, forged steel, A105, F11, F22 valve diameter: DN15 / DN20 / DN25 / DN32 / DN40DN50 / DN65 / DN80 / DN100 / DN125 / DN150 / DN200 DN250 / DN300 / DN350 / DN400 / DN450 / DN500 / DN600 / DN700 / DN800 / DN900 / DN1000 PNS: 1/2 "| 3/4" | 1 "| 1 1/4" | 1 1/2 "| 2" | 2 1/2 "| 3" | 4 "| 5" | 6 "| 8" | 10 "| 12" | 14 "| 16" | 18 "| 20" | 24 "| 28 "| 32" | 36 "valve pressure: low, medium, high pressure, pressure valve temperature: high temperature, low temperature, insulation jacket, at room temperature PN-16P / 25P / 40P / 64P / 100P, CL-150Lb / 300LB / 600LB / 900LB K level -5K / 10K / 20K / 30K / 45K / 65K valve structure: bright bar bracket, dark bar, straight-through, two-way, three-way, four-way, floating, fixed valve seal: soft seal, hard seal , STL, PPL, M, N, B, Cr13 valve standard: JIS / JIS Japanese standard / JPI JIS / ANSI / API ANSI / ANSI ANSI / DIN / DIN DIN / mechanical department JB / Chemical Standards HG20592 / GB / GB GB / JB GB brand: [Zhejiang special high pressure ball valve Valve Co., Ltd.] appearance: Heavy | Large | casting flange valve Suitable medium: water, steam, oil, nitric acid, acetic acid, strong oxidizing medium and urea and other application: water, sewage, construction, petroleum, chemical, food, pharmaceutical, textile, electric power, shipbuilding, metallurgy, energy systems on the pipeline. Address: Wenzhou Shacheng Industrial Park Road 151 [Zhejiang Rui special high pressure ball valve Co.] Tel: 13255775719 Fax: 0577-56668772 QQ: 529962768 flange valve is widely used in petroleum pipelines, long-distance pipelines, chemical , various chemical sewage treatment, mechanical equipment, power generation, pump, gas, air compressors and other corrosive oil, steam piping for lifting device to connect or disconnect the pipeline medium. Flange valve Features 1, compact structure, reasonable design, the valve rigid, channel flow, flow coefficient is small 2, the sealing surface of stainless steel and tungsten carbide, long life 3, the use of flexible graphite packing, sealing, reliable, easy operation and flexible 4 drive mode to manual, pneumatic, electric, gear 5, the structure in the form of elastic wedge single gate, rigid wedge single slide double plate type flange valve standard design specifications: GB / T 12234 length of the structure: GB / T 12221 Flange: JB / T 79 test and inspection: JB / T 9092 Pressure - Temperature: GB / T 9131 Product Identification: GB / T 12220 flange valve - Performance Specification Model Nominal pressure (MPa) Test pressure Operating temperature ( ℃) Suitable medium intensity water (MPa) sealed (water) air (MPa) low pressure sealing air (MPa) Z41H-16C Z41W-16P (R) 1.6 2.4 1.8 0.6 ≤425 nitric acid Z41W-25P (R) 2.5 3.8 2.8 0.6 ≤200 acetic class Z41W-40P (R) 4.0 6.0 4.4 0.6 ≤200 nitric acid Z41W-64P (R) 6.4 9.6 7.0 0.6 ≤200 acetate class flange valve - the main parts of the material body / bonnet ZGICr18Ni9Ti ZG00Cr18Ni10 ZG1Cr18Ni12M02Ti ZG00Cr17Ni14M02 WCB parts Name ZGICr18Ni9Tit series ZG00Cr18Ni10 series ZG1Cr18Ni12M02Ti series ZG00Cr17Ni14M02 series WCB series gate ZGICr18Ni9Ti ZG00Cr18Ni10 ZG1Cr18Ni12M02Ti ZG00Cr17Ni14M02 1Cr13 stem 1Cr18Ni9Ti 00Cr18Ni10 1Cr18Ni12M02Ti 00Cr17Ni14M02 1Cr13 packing PTFE braided PTFE fabric PTFE fabric PTFE woven graphite gasket 304L + PTFE 304L + PTFE 316 + PTFE 316L + PTFE graphite gland ZGICr18Ni9Ti ZG00Cr18Ni10 ZG1Cr18Ni12M02Ti ZG00Cr17Ni14M02 series WCB packing pressure ring 1Cr18Ni9Ti 00Cr18Ni10 1Cr18Ni12M02Ti 00Cr17Ni14M02 1Cr13 1Cr17Ni2 1Cr17Ni2 1Cr17Ni2 1Cr17Ni2 35CrMoA bolt nut 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 1Cr18Ni9Ti 45 -1.6MPa main gate flange connection size size DN 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 L mm 130 150 160 180 200 250 265 280 300 325 350 400 450 500 550 600 650 700 800 H mm 175 180 210 210 350 358 373 435 500 614 674 818 1225 1415 1630 1780 2050 2181 2599 W mm 180 180 200 200 200 240 240 280 320 360,360,400,450,500 500,600,720,720,720 flange steel gate -2.5MPa main connection size size DN 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 L mm 130 150 160 180 200 250 265 280 300 325 350 400 450 500 550 600 650 700 800 H mm 175 180 210 210 350 358 373 435 500 614 674 818 1225 1415 1630 1780 2050 2181 2599 W mm 180 180 200 200 200 240 240 280 320 360 360 400 450 500 500,600,720,720,720 flange steel gate -4.0MPa main connection size size DN 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 L mm 130 150 160 180 200 250 280 310 350 400 450 550 650 750 850 950 H mm 175 180 210 210 350 358 373 435 500 614 674 818 1225 1415 1630 1780 W mm 180 180 200 200 200 240 240 280 320 360 360 400 450 500 500 600 flange steel gate -6.4MPa main connection size size DN 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 L mm 170 190 210 230 240 250 280 320 350 400 450 550 650 750 850 950 H mm 175 180 210 230 350 359 373 435 500 614 674 818 970 1145 1280 1450 W mm 120 120 140 160 200 240 280 320 360 400 400 450 560 640 800 800 flange steel gate -10.0MPa main connection size size DN 15 20 25 32 40 50 65 80 100 125 150 200 250 L mm 170 190 210 230 240 250 280 310 350 400 450 550 650 H mm 175 180 210 230 350 359 373 435 500 614 674 818 970 W mm 120 120 160 180 240 280 320 360 400 450 560 640 720 flange steel gate -16.0MPa main connection size size DN 15 20 25 32 40 50 65 80 100 125 150 200 L mm 170 190 210 230 240 300 340 390 450 525 600 750 H mm 175 180 210 230 350 359 373 435 500 614 674 818 W mm 120 120 140,160,200,240,280 320,360,400,400,450 Address: Wenzhou Economic and Technological Development Zone in the center of Gaza City West 38 Street (million Grand Hotel opposite) Tel: 0577-86860004 Fax: 0577-85987575 Mobile: 18767710327 Jane Lynn URL: www.wdvalve.com mail: wd@wdvalve.com