Product Overview: a variety of industrial automation production pipeline flow, pressure, temperature control. Use: electric power, metallurgy, petrochemical, environmental protection, energy management, fire protection systems. Cast steel gate valve opening and closing parts is, the direction of movement of the fluid direction perpendicular to the gate, gate can only be fully open and fully closed, can not be adjusted and the throttle. Ram has two sealing surface, the two most commonly used sealing surfaces wedge gate valves forming wedge, wedge angle with the valve parameters vary, usually 5 °, the medium temperature is not high for 2 ° 52 '. Wedge gate valve can be made into a whole, called the rigid gate; can also be made to produce small quantities of deformation gate in order to improve its process, to make up the sealing surface angle deviations arising during processing, this gate board called the flexible gate. LIANGGONG HTF gate Z41H-16I define all metal cast into steel castings machined steel gate valve collectively. And cast iron gate valve also corresponds, forged steel gate, malleable iron gate. LIANGGONG HTF gate Z41H-16I classified material divided by steel valve, stainless steel valve, low-alloy steel gate (high temperature resistant chromium-molybdenum steel belong to this category), low temperature steel gate and so on. There are all kinds of cast steel gate valve under a variety of specific steel grades used are as follows: 1, carbon steel valve castings grades are: WCA, WCB, WCC, LCB, etc; Temperature -46 degrees to 425 degrees. 2, stainless steel valve castings Grade: 301 stainless steel, CF8 stainless steel (corresponding to 304 forgings), CF8M Stainless Steel (corresponding forged 316 stainless steel), etc; Temperature -198 degrees to 816 degrees. 3, sub-high-temperature alloy steel and low alloy high strength low alloy steel, high temperature alloy which is often said that the chromium-molybdenum steel. Chromium molybdenum steel gate valve castings grades: ZG1Cr5Mo, ZG15Cr1MoV, ZG20CrMoV, WC6, WC9, C12A, etc. Suitable temperature of 550 degrees to 750 degrees. Each particular grade material suitable temperatures vary, depending on the actual working conditions chosen. Speaking in steel gate valve procurement generally refers WCB grade steel gate, because in most earlier when steel castings no such rich as they are now, when it comes to this material WCB cast steel gate only good selection, a long time default Cast steel gate valve is the WCB, WCB steel gate is the oldest and one of the most widely used form of structural valve. HTF gate using standard? GB PN (MPa) American Standard pound class (Class) Japanese standard JIS (K grade) valve Nominal 1.6 2.5 4.0 6.4 10.0 150 300 400 600 900 10K 20K body strength test pressure (Mpa) 2.4 3.8 6.0 9.6 15.0 3.1 7.8 10.2 15.3 23.1 3.1 7.8 High-pressure water seal test (Mpa) 1.8 2.8 4.0 7.0 11.0 2.1 5.6 7.5 11.2 16.8 2.1 5.6 Low gas seal test (Mpa) full press 0.5Mpa ~ 0.7Mpa gas medium pressure test inspection drain. Test implementation of the standards: GB / T 13927 "Name universal valve pressure test" Design Standard: GB / T12234 "oil and gas industry with stud connection bonnet steel gate" flange connection: JB / T "Department of Mechanical flange standards" , GB / T 9113 "national recommended standard flange", HG / T 20592 "Ministry of Chemical flange" Structure length: GB12221 "structural length metal valves" nominal diameter: DN15 ~ DN1200mm Nominal pressure: PN10 ~ PN320,1.0Mpa ~ 32.0Mpa LIANGGONG HTF gate Z41H-16I Medium: 1, steel gate material code "C": conducting oil, oil, steam (temperature ≤425 ℃) 2,304 stainless steel valve material code "P": nitric acid (temperature ≤200 ℃) 3,316 stainless steel valve material code "R": acetic acid class (temperature ≤200 ℃) 4, WC6, WC9 chromium molybdenum steel gate material code "I": conducting oil, oil, steam (temperature ≤595 ℃) and so on ...... HTF valve should be checked before installation 1. Install the valve cavity and sealing surfaces and other parts, does not allow dirt or sand attached; 2. The joints bolts evenly tightened requirements; 3. Check the packing site pressing requirements, both to ensure the tightness of packing, but also to ensure the gate open and flexible; 4. User Before installing the valve, the valve must be calibrated model, connection size and attention to the medium flow, to ensure consistency with the requirements of the valve; 5. Users When installing the valve, the valve must be set aside the necessary drive space; 6. shall drive circuit wiring diagram; 7. The gate must be regularly maintained, not free collision and extrusion, to avoid affecting the seal. HTF Valve Installation Notes 1. Installation position, altitude, direction and export must meet the design requirements, the connection should be firmly tight. 2. installed on various types of pipe insulation manual valve handle shall not be down. 3. The valve must be visually inspected prior to installation, the valve plate should comply with the provisions of the current national standard GB 12220 "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off the main pipe valves should be installed before the strength and rigorous performance tests, passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal duration of not less than 5min, the valve housing, packing should be no leakage as qualified. Tightness test, the test pressure of 1.1 times the nominal; test pressure in the test duration should be consistent with GB 50243 standards, with no leakage valve sealing surface is qualified. 4. hand wheel, handle and drive mechanism for lifting are not allowed to use, and forbid the collision. 5. Gate Valve should be mounted vertically (ie, stem in a vertical position, the hand wheel at the top). With a bypass valve to open the bypass valve opening should be preceded (in order to balance imports and exports and reduce the pressure opening force). With gate drive mechanism, according to the provisions of product installation instructions. If the valve switch is used frequently, lubrication at least once a month. Advantages and disadvantages of a cast steel gate valve, Advantages: fluid resistance, sealing surface by brush distressed medium and small erosion. Open and close more effort. Medium flow unrestricted, non-spoiler, do not reduce the pressure. Simple structure, the short length of the structure, good manufacturing processes, high temperature high pressure alternative materials, a wide range of applications. 2. Disadvantages: easy sealing surface between cause erosion and abrasion, maintenance more difficult. Dimensions large open space requires a certain opening and closing a long time. HTF gate valve classified according to form sub-sub-gate by gate form: wedge gate-type valve and parallel gate-type valve, wedge gate-type valve can be divided into: single-gate type, double plate and flexible gate type; parallel gate type valve can be divided into single-gate type and double plate. Divided by the valve stem by stem whether lifting movements, can be divided into bright and dark bar bar gate valve. While rotating the valve stem is clear shot valve lift; the stem will not lift rotary valve stem is dark. Rising stem gate valve with the valve stem linear movement, called the lift rod valve (also called clear shot valve). Often movements are trapezoidal threaded rod through the top of the valve guides and valve nut on the rotary motion into linear motion, which is the operating torque thrust into action. Open the valve, when the gate valve lift height equal to the diameter of the 1: 1 times, the fluid channel is completely smooth, but at run time, this position is not monitored. Actual use, is the apex of the stem as a sign that the fixed position, as its fully open position. Temperature appears to consider locking phenomenon, usually open to the vertex position, and then rewind 1 / 2-1 circle, as the position of the valve fully open. Therefore, the fully open position of the valve, according to gate position (ie, travel> to determine. Some valve stem nut located at the gate, not the stem light rotation movements, hand-driven rotation of stem rotation, leaving ram upgrade, this valve is called the rotating rod valve or valve called the dark bar switch with rising stem gate valve as open to not turn to open, will not turn off on to full off. Compared to the sluice gate next shot Unable to view with the naked eye, difficult to grasp the plate opening, the need to install the opening of the bar. HTF gate valve sealing principle sealing principle divided, self-sealing and forced sealed steel gate valve when closed, the sealing surface can only rely on media pressure to seal, which rely on the sealing surface of the medium pressure to ram pressure to the other side of the seat to ensure the sealing surface, which is self-sealing when the valve is closed, to rely on external pressure to force the gate valve seat to ensure tight seal surface, which is mandatory seal used in automatic domestic pressure valve seals are used to force the low-pressure valve sealing principle. Self-sealing structure and gate automatic sealing principle above stated pressure valve are two different things, refers to a self-sealing structure with the valve bonnet central location of a connection structure for a self-sealing structure, different from the low-pressure and medium pressure to force the central part of the sealing valve flange connection. FIG valve is forced under the central sealing flange connection structure, by bolts, The body and bonnet pressing connection, and since the middle of the valve seal structure is no .PN160 pressure flange bolts following are mandatory seal; PN160 pressure to use more than just self-sealing valve structure suitable for medium and application temperature shell.? For media materials suitable temperature (℃) carbon steel (C-type) thermal oil, steam, oil ≤425 chrome nickel titanium steel (P-type) nitric acid ≤200 chrome-nickel, molybdenum and titanium steel (R-type) acetic acid class ≤200 Cr-Mo steel (I type) thermal oil, steam, oil ≤550 main parts material body, bonnet valve plate, seat stem handwheel stem packing nut quality carbon steel or stainless steel + chromium carbide Stainless steel aluminum bronze graphite asbestos packing malleable iron-chromium-nickel stainless steel titanium, stainless steel + titanium alloy chromium nickel aluminum bronze Baptist PTFE malleable iron-chromium-nickel stainless steel, molybdenum and titanium, nickel chromium molybdenum steel + titanium carbide steel aluminum bronze Baptist PTFE malleable iron-chromium-molybdenum alloy steel + aluminum alloy chromium-molybdenum steel and aluminum bronze flexible asbestos +33.4 Malleable iron? product shape and structure size (PN100) Z40H, Z40Y, Z40W type (PN100) steel wedge gate valve ? shape and structure size DN LD D1 D2 D8 bz × d H H1 D0 Weight / kg 25 210 135 100 78 501 24 4 × 18 310 -? - 13 32 230 150 110 82 65 24 4 × 23 320 -? - 20 40 240 165 125 95 75 26 4 × 23 360 -? - 60 50 250 195 145 112 85 28 4 × 25 490 558 360 50 65 280 220 170 138 110 32 8 × 25 540 622 400 70 80 310 230 180 148 115?? 34 8 ×? 25 572 671 400 100 100 350 265 210 172 145 38 8 ×? 30 573 671 400 110 125 400 310 250 210 175 42 8 ×? 34 744 892 560 180 150 450 350 290 250 205 46 12 ×? 34 ? 800 972 560 250 200 550 430 360 312 265 54 12 × 41 800 972 560 360 250 650 500 430 382 320 60 12 × 41 1050 1305 -? - 300 750 585 500 442 375 70 16 × 48 1200 1505 -? - Product shape and structure size (PN160) Z40H, Z40Y, Z40W type (PN160) steel wedge gate valve shape and structure size DN LD D1 D2 D8 bz ×? d H H1 H0 Weight / kg 15 170 110 75 52 35 24 4 ×? 18 230 250 200 7 20 190 130 90 62 45 26 4 ×? 23 260 288 200 10 25 210 140 100 72 50 28 4 ×? 23 280 310 280 14 32 230 165 115 85 65 30 4 ×? 25 312 350 320 21 40 260 175 125 93 75 32 4 ×? 27 350 395 320 26 50 300 215 165 132 95 36 8 ×? 25 512 612 360 73 65 360 245 190 152 110 44 8 ×? 30 560 677 360 110 80 390 260 205 168 130 46 8 ×? 30 585 686 400 141 100 450 300 240 200 160 48 8 ×? 34 631 751 450 185 125 525 355 285 238 190 60 8 ×? 41 723 868 560 320 150 600 390 318 270 305 66 12 ×? ? 41 820 997 640 462 200 750 480 400 245 265 78 12 × 48 990 1224 720 711 Product Ordering Information:? 1. The user has identified the valve type and model (especially non-standard models), you should explain what the correct model and requirements. 2. The user should be listed in the order based on a sample product model, as there are special requirements for product items, please order: 1) the structure of length 2) Flange standard 3) of the valve structure: as channel full bore or reduced diameter, body cap is attached Form 4) within the valve parts and other material requirements 5) pressure test, test, marking and other requirements 3, when the occasion is very important to use the valve or the environment is more complex when you try to provide design drawings and detailed parameters by our experts for you to review all types of check valves 4. The Company's production to meet the requirements specified in the order, products factory have one by one according to the requirements of the relevant standards for rigorous inspection and testing. 5. HTF valve product warranty period for all: Customer formal installation within 12 months or products manufactured within 18 months.