Stem education madurai
List stem education madurai
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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 operatea gate valve is a gate plate of an opening and closing part
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 long
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, ccsstandards: en 593, api609, api6d,
more video of gate valve, please see: https://wwwcom/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
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
gate valves generally have two sealing surfaces, adding some difficulties to processing, grinding and maintenance
disadvantages
the overall dimensions and opening height are largethe movement direction of the gate plate is perpendicular to the direction of the fluidthe reason is the long shutdown timeusually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1cr13, stl6, stainless steel, etcthe gate valve is sealed by the contact of the valve seat and the gate plate
less effort when opening and closingthe gate valve can only be fully opened and fully closed, and cannot be adjusted or throttledthe gate has a rigid gate and an elastic gatethe space required for installation is largeaccording to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve
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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Here’s a brief overview of its features, selection considerations, and usage:
features:
concentric design: the wafer concentric butterfly valve features a concentric design where the stem passes through the center of the disc, ensuring a uniform seal around the circumferencethis compact design saves space and facilitates easy installation and removalconsider factors such as flow rate, system pressure, and compatibility with existing piping
resilient seating: most wafer concentric butterfly valves come with resilient seat materials such as epdm or nbr, which provide excellent sealing properties and resistance to wear, corrosion, and chemicals
material construction: select valve materials compatible with the fluid being handled and the environmental conditionstemperature, viscosity, chemical compatibility) and sealing requirementsmanual valves are operated by hand, while actuated valves can be controlled remotely using pneumatic, electric, or hydraulic actuators for automated flow controlcommon materials include stainless steel, carbon steel, ductile iron, and various alloys
bidirectional sealing: the concentric design allows for bidirectional sealing, meaning the valve can be installed in either direction without affecting its performance
emergency response: establish protocols for responding to valve failures, leaks, or other emergencies, including shutdown procedures, isolation measures, and contingency plans to mitigate risks and minimize disruptions
operation: operate the valve manually or remotely using the designated controls, following established procedures for opening, closing, and adjusting the flow as needed
selection considerations:
size and pressure rating: choose a valve size and pressure rating suitable for the intended application and operating conditionsthis design minimizes turbulence and pressure drop while providing efficient flow control
seat material: consider the type of seat material (e
usage:
installation: properly install the wafer concentric butterfly valve between flanges using appropriate gaskets and fasteners according to manufacturer specifications and industry standards
by considering these factors and following best practices for selection, installation, and maintenance, wafer concentric butterfly valves can effectively control flow and provide reliable performance in marine applications and other industrial settings
wafer style: these valves have a wafer-style body, which means they fit between two flanges without the need for additional bolts or nuts
monitoring: periodically monitor the valve’s operation and condition for signs of leakage, wear, or malfunction, and take corrective action as required to prevent downtime or safety hazardsepdm, nbr, ptfe) based on the fluid properties (e
manual or actuated operation: wafer concentric butterfly valves are available in manual or actuated configurations
standards compliance: ensure the selected valve complies with relevant industry standards and certifications for quality, performance, and safety, such as ansi, api, iso, and marine classification societies’ requirementsa wafer concentric type butterfly valve is a type of butterfly valve commonly used in various industries, including marine applications
operation type: decide whether manual or actuated operation is preferred based on the level of automation required, accessibility, and control system integration
maintenance: implement a regular maintenance schedule to inspect, clean, lubricate, and replace components as necessary to ensure optimal performance and longevityIndia
₹ 13827
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Let’s break down its features, considerations for selection, and how it’s typically used:
features:
concentric design: like other concentric butterfly valves, this type features a design where the stem passes through the center of the disc, ensuring a uniform seal around the circumference
selection considerations:
size and pressure rating: choose a valve size and pressure rating suitable for the intended application and operating conditionsrubber seats offer resilience, chemical resistance, and longevity, making them suitable for various fluids and operating conditions
rubber seating: the valve has rubber or elastomeric seating, typically made from materials like epdm or nbr, which provide excellent sealing propertiesconsider factors such as flow rate, system pressure, and compatibility with existing piping
material construction: select valve materials compatible with the fluid being handled and the environmental conditionstemperature, viscosity, chemical compatibility) and sealing requirementsmanual valves are operated by hand, while actuated valves can be controlled remotely using pneumatic, electric, or hydraulic actuators for automated flow controlcommon materials include stainless steel, carbon steel, ductile iron, and various alloys
emergency response: establish protocols for responding to valve failures, leaks, or other emergencies, including shutdown procedures, isolation measures, and contingency plans to mitigate risks and minimize disruptions
operation: operate the valve manually or remotely using the designated controls, following established procedures for opening, closing, and adjusting the flow as needed
by considering these factors and following best practices for selection, installation, and maintenance, lug concentric butterfly valves with rubber seating can effectively control flow and provide reliable performance in marine applications and other industrial settings
bidirectional sealing: similar to other concentric butterfly valves, this type can seal bidirectionally, allowing it to be installed in either direction without affecting its performancethis design minimizes turbulence and pressure drop while providing efficient flow control
lug style: the valve body has lugs (also known as ears or tabs) on the valve’s periphery, allowing it to be bolted directly between flanges in the pipeline
seat material: consider the type of seat material (ethis design provides easy installation and removal without needing to disconnect the entire pipelinea lug concentric type butterfly valve with rubber seated refers to a specific configuration of a butterfly valve commonly used in various industries, including marine applications
monitoring: periodically monitor the valve’s operation and condition for signs of leakage, wear, or malfunction, and take corrective action as required to prevent downtime or safety hazards
manual or actuated operation: lug concentric butterfly valves are available in both manual and actuated configurationsepdm, nbr, ptfe) based on the fluid properties (e
standards compliance: ensure the selected valve complies with relevant industry standards and certifications for quality, performance, and safety, such as ansi, api, iso, and marine classification societies’ requirements
operation type: decide whether manual or actuated operation is preferred based on the level of automation required, accessibility, and control system integration
maintenance: implement a regular maintenance schedule to inspect, clean, lubricate, and replace components as necessary to ensure optimal performance and longevity
usage:
installation: properly install the lug concentric butterfly valve between flanges using appropriate gaskets and fasteners according to manufacturer specifications and industry standardsIndia
₹ 13827
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