Welded
List welded
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Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1cr13, stl6, stainless steel, etcthe reason is the long shutdown timestandards: en 593, api609, api6d,
more video of gate valve, please see: https://www2 cert (on request)
standards
design and manufacture conform to awwa, bs5163, din-f4,f5
dimensions conform to en1092-2,ansi b16
the structure length is small
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
gate valves generally have two sealing surfaces, adding some difficulties to processing, grinding and maintenance
disadvantages
the overall dimensions and opening height are large
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
the shape is simple, the structure length is short, the manufacturing process is good, and the application range is wide
less effort when opening and closing
large height and long opening and closing time
during the opening and closing process, there is relative friction between the sealing surfaces, which can easily cause scratchesthe space required for installation is largethe gate valve is sealed by the contact of the valve seat and the gate platethe movement direction of the gate plate is perpendicular to the direction of the fluidthe gate has a rigid gate and an elastic gate
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, ccsthe use of ptfe packing is reliable and easy to operateaccording to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve
the medium can flow in any direction on both sides, easy to installcom/watch?v=ai-lt1dy2suthe gate valve can only be fully opened and fully closed, and cannot be adjusted or throttleda gate valve is a gate plate of an opening and closing part
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
water hammer phenomenon is not easy to produce5
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 resistanceIndia
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