Supply up and down exhibition type insulation discharge valve manufacturer wholesale

  Supply up and down expansion type insulation discharge valve manufacturer wholesale one, brief description;
The nominal diameter of the up-down expansion type insulation discharge valve (also known as mean outside diameter) indicates the symbol DN, which is the general diameter of various pipes and pipeline accessories
Pipes and pipe accessories with the same nominal diameter can be connected with each other and have interchangeability It is not the outer diameter or inner diameter of the pipeline in the actual sense
Although its value is close to or equal to the inner diameter of the pipeline, in order to unify the connection dimensions of pipes and fittings, the nominal diameter (also known as nominal diameter and nominal diameter) is adopted
For example, welded steel pipes can be divided into thin-walled steel pipes, ordinary steel pipes and thickened steel pipes according to thickness
Its nominal diameter is neither the outer diameter nor the inner diameter, but a nominal dimension similar to the inner diameter of ordinary steel pipe
Each nominal diameter corresponds to an outer diameter, and its inner diameter value varies with thickness
The nominal diameter can be expressed in metric mm or inch
Pipe accessories are also represented by nominal diameter

It refers to the allowable large working pressure for applications below 120 ℃; For the control valve with stainless steel valve body, it refers to the allowable large working pressure for applications below 250 ℃
When the working temperature increases, the pressure resistance of the valve body will decrease
For example, the carbon steel control valve with nominal pressure of 6
4Mpa (pn64) has a pressure of 5
2mpa at 300 ℃, 4
1mpa at 400 ℃ and 2
9MPa at 450 ℃

II; introduce
The material of the pressure valve body of the up-down expansion insulation discharge valve is cast steel, stainless steel, 316L
Working pressure 0
6-2
5mpa, working temperature - 20 ℃ - 425 ℃
Valve diameter dn25-dn300
Connection method: flange
Transmission mode: manual and pneumatic
Applicable media: oil products, acids, corrosive media, etc
Manufacturing standard: national standard http://www
shjbn
com/pv7311536718424
htm  ;
The discharge valve is welded to the bottom of the storage tank and other containers by means of the bottom flange of the valve, so as to eliminate the residue of process medium at the outlet of the container According to the needs of the actual situation, the bottom structure of the discharge valve is designed as flat bottom type, the valve body is V-type, and the valve disc is provided with two working modes of lifting and lowering
The inner cavity of the valve body is provided with a scouring and corrosion-resistant sealing ring
At the moment of opening the valve, the valve body can be protected from scouring and corrosion by the medium
The sealing ring is specially treated to make the surface hardness reach hrc56-62, which has the function of high wear resistance and corrosion resistance
When necessary, the cover of the valve disc seal is overlaid with cemented carbide, and the sealing pair adopts wire seal to ensure the reliability of the seal, And can prevent scarring
At the same time, the design of short stroke valve disc is adopted

Up and down expansion insulation discharge valve, corrosion resistance: 1 Use media such as water, alcohol, ammonia, barium carbonate and benzene (the temperature of WCB material is - 29 ℃ - 425 ℃)
2
Use media such as particles, oil products, pulp and carbon dioxide gas (stainless steel can be used at - 60 ℃ - 232 ℃)
3
It is forbidden to use fluorine-containing ionic liquids (such as HF) or strong bases and (temperature less than 150 ℃, concentration & gt; 30%)
4
General working temperature of stainless steel ≤ 150 ℃, pressure range 0
6-2
5mpa,
III; parameter
Up and down expansion type insulation discharge valve
Material: stainless steel cast steel
Service pressure; 1
6MPa
Applicable medium: Water Liquid General corrosivity; wait!
Nominal diameter: dn15-300mm
Service temperature: 425 ℃ for cast steel and 150 ℃ for stainless steel
When ordering beyond this provision, it shall be explained

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