Gate materials for electrical engineering
List gate materials for electrical engineering
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These characteristics, combined with low thermal expansion, make it ideal for interface materials used in various molten metal processesthermal management of electronic devices the unique combination of electrical resistivity and thermal conductivity makes bn an ideal heat sink in high power electronic applicationshot-pressed bn is compacted at temperatures up to c and pressures up to psi to form a dense, strong engineering material that is easily machinedfour material grades grades hbc and hbt are our highest purity hot-pressed boron nitridesgrade hbr uses calcium borate as a strengthening binder and is moisture insensitivemomentive offers boron nitride insulators and washers for vacuum furnacesits properties compare favorably with beryllium oxide, aluminum oxide and other electronic packaging materials, and it is easier to form and finishthey are diffusion bonded and feature a low dielectric constant, minimal moisture pick-up and low loss tangent making them ideal for electronic applicationsgrade hbn uses small amounts of boric oxide as a binder; it is used in applications where hydration and thermal shock are not a concerngrade hbt, although lower in strength and density than hbc, is available at lower cost and shorter lead timeshigh temperature applications temperature stability and excellent resistance to thermal shock make bn the material of choice in the toughest high temperature applications such as plasma arc welding and semiconductor processingit is available in standard and custom shapes and has several unique properties which make it valuable in a wide range of challenging industrial applicationsfor applications demanding even higher strength and durability, momentive offers grade bin77 composite material; see publication for more detailsmolten metal handling bn is inorganic, inert and is not wet by most molten metals and slags, nor does it react with halide salts or other reagentsdelhi, mumbai, kolkata, chennai, bangalore, pune, ahmedabad, vadodra,surat, vapi, aurangabad, kohlapur, raigad, raipur, lucknow, jaipur, udaipur, trivandrum, coimbatore, bhopal, gurgaon, raipur, manesar, bhubaneshwar, jamshedpur, hyderabad, vizag, vijayawada, goa, hosur, nagpur, rajkot, kanpur, india mob
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The gate has a rigid gate and an elastic gateaccording to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valvea gate valve is a gate plate of an opening and closing partthe gate valve is sealed by the contact of the valve seat and the gate platestandards: en 593, api609, api6d,
more video of gate valve, please see: https://wwwthe movement direction of the gate plate is perpendicular to the direction of the fluidthe gate valve can only be fully opened and fully closed, and cannot be adjusted or throttledusually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1cr13, stl6, stainless steel, etc
area of application
marine industry, water supply & drainage, fire fighting, shipbuilding, water treatment, power stations, energy, food, chemical, and other systems
data sheet of gate valve:
type: wafer, double flange
size & connections: resilient seated: dn50 to d600
metal seated: dn50 to dn1200
medium: waste water, water, seawater, air, inert gas, oil
related types of valves:
we can also produce check valve, globe valve, knife gate valve and ball valve with api, jis, din standard, used in oil, gas, marine industry, water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with nominal diameter of dn50 to dn1200, nbr/epdm/viton, certificates & approvals: dnv-gl, lloyds, dnv, bv, api, abs, ccs5
face to face dimensions conform to en558-1, api 594, din3202
testing conform to en12266-1, api598
material of gate valve parts
part name material
body cast iron; ductile iron; stainless steel; carbon steel
disc / flap stainless steel; carbon steel; bronze
shaft / stem brass, stainless steel monel; stainless steel inconel
seat / lining nbr/epdm/viton
ss/bronze
bolts carbon steel
nuts stainless steel
gasket/packing graphite
name plate aluminum
washer steel
handwheel cast iron
bushing/ring cast brass
actuation
worm-gear/hand-wheel
electric-actuator
pneumatic-actuator
hydraulic-actuator
gate valve features
advantages:
low flow resistance
the medium can flow in any direction on both sides, easy to installthe use of ptfe packing is reliable and easy to operate
the structure is compact, the valve has good rigidity, the channel is smooth, the flow resistance is small, the sealing surface is made of stainless steel and hard alloy, and the service life is longcom/watch?v=ai-lt1dy2su
materials: cast iron / ductile iron/ carbon steel / stainless
steel / alu bronze
pressure rating: pn10, pn16, pn25
temperature: -30°c to 200°c
seat/lining: replaceable liner / bonded liner
nbr/epdm/viton; ss/bronze
certificates & approvals: dnv-gl, lloyds, dnv, abs, bv type approval
3
large height and long opening and closing time
the structure length is small
gate valves generally have two sealing surfaces, adding some difficulties to processing, grinding and maintenance
disadvantages
the overall dimensions and opening height are largethe reason is the long shutdown time
less effort when opening and closingthe space required for installation is large
during the opening and closing process, there is relative friction between the sealing surfaces, which can easily cause scratches2 cert (on request)
standards
design and manufacture conform to awwa, bs5163, din-f4,f5
dimensions conform to en1092-2,ansi b16
the shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide
water hammer phenomenon is not easy to produceIndia
₹ 1
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Objective question bank in electrical engineering (with explanatory answers) -- by a panel of experts; price: 345/- publisher: aroma publishing housearoma publishing house, books by vinay - asking price is negotiable for this books for preparation of ongc, drdo, gate, ies and other psu 's examinations, following books are outstandingly helpful: ->> objective question bank in electronics engineering (with explanatory answers) -- by a panel of experts; pages: 608, price: 545/- publisher: aroma publishing housecontains: original previously asked questions with detailed solutions
Delhi (Delhi)
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Objective question bank in electrical engineering (with explanatory answers) -- by a panel of experts; price: 345/- publisher: aroma publishing housefor preparation of ongc, drdo, gate, ies and other psu 's examinations, following books are outstandingly helpful: ->> objective question bank in electronics engineering (with explanatory answers) -- by a panel of experts; pages: 608, price: 545/- publisher: aroma publishing housecontains: original previously asked questions with detailed solutions
Delhi (Delhi)
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India
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Job description functional area: evaluates electrical systems, products, components, and application materialsgood knowledge of electrical & electronics equipment/componentsdevelops electrical products by studying customer requirements; researching and testing manufacturing and assembly methods and by designing and conducting research programs; applying knowledge of electricity and materialsexperience required: 0 to 1 years salary offered: 45,000 - 60,000 per month skills required: fresher, graduate, electrical engineer, engineer, good communication skillsa good team leadercandidate should have its own convince (mandatory for male)confirms system's and components' capabilities by designing testing methods; testing propertiesgood convincing power
India
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India
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