High Quality Heavy stop valve.

Ref Price:
$10.27 / watt
Loading Port:
Ningbo
Payment Terms:
TT or LC
Min Order Qty:
1000 watt
Supply Capability:
100000 watt/month

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Product Description:

High    Quality   Heavy    stop    valve.Heavy stop valve  size:20-63

1.Material:Random Polypropylene(Hyosung R200P); 
2.ISO9001&ISO14001; 
3.Standard:GB/T 18742.3-2002, DIN8077/8078; 
4.OEM also ok

 

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Q:Ask about the valve of home improvement
Common valve position is few, 1 or 2 wash basin faucet pipe toilet pool 3 4 water heater 5 water washing machineThese positions require only simple ball valves or globe valves. Gas valves need not be considered, provided by gas installation companies (specific standards).The main valve can achieve the above water source control, the installation of the branch valve is to take into account the maintenance is convenient, does not affect other water.
Q:What does the valve "4" mean?
An inch of eight points, home tap, valve is generally 4 points
Q:Dalian hi Max Valve Co., Ltd.
I have some of them in the series of drawings.Build said veteran enterprises is the main power station valve company opened high pressure valve Wenzhou world Gansu Shenyang Nantong Shen Langao high power of Dalian is still high in alphabetical orderThe main floor is to engage in large high valve industry is a very good platform after the switch is convenient to say we all know whether peer or do
Q:How do you calculate the flow of the valve?
Valve flow calculation value is very vague, pipe pressure, back pressure, medium viscosity, medium temperature, valve structure, and so on, will affect the calculated value.
Q:What does 3/4''mean in the name of the valve?
Valve diameter, that is, we often say 6 points valve, used in English units, with metric units should be DN20.2 points DN84 points DN156 points DN20 (3/4'')1 inches DN251.2 'DN321.5 'DN402 'DN502.5 'DN653 'DN804 'DN1005 'DN1256 'DN1508 'DN20010 'DN25012 'DN300Nominal diameter (nominal, diameter), also known as the average diameter (mean, outside, diameter).The tube is thin from the metal tube, and the outer diameter of the tube is almost the same as the inner diameter of the tube, so the average value of the outer diameter of the tube and the inner diameter of the pipe is called the diameter.Because the units have metric (mm) and British (inch) distinction, there are the following methods of address.1., based on the metric system (mm), called DN (metric unit)2., on the basis of the British system (inch), called NB (inch unit)DN (nominal, diameter)NB (nominal, bore)OD (outside, diameter)4. [case]Galvanized steel pipe DN50, sch 20Galvanized steel pipe "NB2", sch 205., the outer diameter and DN, NB relationship is as follows:------DN (mm), --------NB (inch), -------OD (mm)15-------------- 1/2--------------21.320--------------3/4 --------------26.725-------------- 1, ----------------33.432-------------- 1, 1/4, -----------42.240-------------- 1, 1/2, -----------48.350-------------- 2, -----------60.365-------------- 2, 1/2, -----------73.080-------------- 3, -----------88.9100-------------- 4, ------------114.3125-------------- 5, ------------139.8150-------------- 6, ------------168.3200--------------- 8------------219.1The above data is referenced only in ASTM A53. Please note that there are some differences in external diameter with different specifications.
Q:What's the caliber of the valve 1/4?
1 inches is equal to 25.4mm, 1/4 how big, count it yourself.
Q:Which valves are used in the power station?
Water supply system: butterfly valve, gate valve, eccentric hemisphere valveOil and gas system: stainless steel ball valve, stop valveFire fighting system: gate valve, relief valve, relief valve, sprinkler system
Q:What is the difference between low pressure valves and medium pressure valves and high pressure valves?
In fact, this is only the valve industry sector argument, not necessarily to distinguish between very clear.As long as the customer pressure requirements, we give him the drawings on it.Valve flange thickness and valve thickness are not standardized, according to pressure requirements.The flange thickness of 6.4Mpa and 10Mpa is completely different from that of valve body.For example: general gate valve, the most basic pressure 1.6MPa, according to GB/T139272008 and JB/T90921999 standard castingGenerally selected 1.6MPa, when the highest pressure pressure is 1.6X1.5=2.4MPa, if you exceed this pipeline pressure is not, there are now many manufacturers in order to save costs, the valve wall is thin, a conventional valve pressure 1.6MPa is a bit difficult.My own boundaryVacuum negative pressure 0.05Mpa-0.5Mpa0.6Mpa-1.6Mpa belongs to normal pressure (low pressure)2.5Mpa-4.0Mpa belongs to medium pressure6.4Mpa-10Mpa-16Mpa-25Mpa-32Mpa-42Mpa belongs to high pressure50Mpa-80Mpa belongs to supercritical high pressure valve
Q:High and low pressure valve is how to distinguish?
Vacuum valve - valve with operating pressure below standard atmospheric pressure.Low pressure valve - nominal pressure PN is less than 1.6MPa valve.Medium pressure valve - nominal pressure PN 2.5~6.4MPa valve.High pressure valve - nominal pressure PN10.0~80.0MPa valve.Ultra high pressure valve - nominal pressure PN greater than 100MPa valve.
Q:What are the definitions of internal, external and leakage valves?
Upstairs to say there is a problem. The leakage within the valve that is the reason of erosion wear medium makes the valve is not closed tightly, even if the valve screw (stem) screwed in place, because there is still a gap between the spool and the valve body, the medium can flow past. Outside leakage generally refers to the valve and connecting flange or threaded connection between the seal and guide...

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