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Upper/lower discharge valve

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.

Key words:

Classification:

Cast steel valve series

Product Consulting:

Description


A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Product use

The valve is mainly used for the bottom discharge of reactors, storage tanks and other containers. It is welded to the bottom of storage tanks and other containers by means of the bottom flange, so as to eliminate the residual phenomenon of process medium usually in the container outlet. It is widely used in chemical, petroleum, metallurgy, pharmaceutical, pesticide, dye, food processing and other industries.

◆Product features

On, under the expansion of the discharge valve according to the needs of the actual situation, put the bottom structure design for the flat bottom type, the valve body is V-shaped, and provide lifting and lowering two ways of working valve. The inner cavity of the valve body is equipped with a erosion-resistant and corrosion-resistant sealing ring. At the moment of opening, it can protect the valve body from being washed and corroded by the medium, and special treatment is carried out on the sealing ring to make the surface hardness reach HRC56-62, which has high wear resistance and corrosion resistance. Valve seal according to the need when the sealing surface are surfacing with hard alloy, sealing line seal, ensure the reliability of the seal, and can prevent scarring. At the same time, take the design of short stroke valve. Various operation modes, such as manual, pneumatic (spring return type, double action type, with hand wheel and without hand wheel), electric, hydraulic, gear, etc.

◆ Executive standards

Product Specification Structure length Connecting flange TEST AND INSPECTION Pressure-Temperature
GB/T12221 GB/T9113
EN1092-1/2
HG/T 20592

GB/T13927
GB/T26480
GB/T12224

 

◆ Material of main parts

Part Name ZG1Cr18Ni9Ti Series ZG00Cr18Ni10 Series ZG1Cr18Ni12Mo2Ti Series ZG00Cr17Ni14Mo2 Series WCB Series
Body/Bonnet 1Cr18Ni9Ti 00Cr18Ni10 1Cr18Ni12Mo2Ti 00Cr17Ni14Mo2 WCB
Stem 1Cr18Ni9Ti 00Cr18Ni10 1Cr18Ni12Mo2Ti 00Cr17Ni14Mo2 20Cr13
Disc 1Cr18Ni9Ti 00Cr18Ni10 1Cr18Ni12Mo2Ti 00Cr17Ni14Mo2 A105 STL
Gasket 304 graphite 304L Graphite 316 graphite 316L Graphite 304 graphite
Stud A193 B8 A193 B8 A193 B8M A193 B8M
Nut A1948 A1948 A1948M A1948M A1942H

 

◆ Main dimensions (bottom type)

DN(mm) Upper flange Lower flange Sealing seat
D1 D2 D3 D4 D5 D6
FL45F/W-16
25 115 85 135 100 70 40
32 135 100 145 110 75 55
40 145 110 160 125 100 65
50 165 125 180 145 85 70
65 180 145 195 160 135 90
80 195 160 215 180 155 130
100 215 180 245 210 195 135
125 245 210 280 245 180 145
150 280 240 335 295 210 185
200 335 295 405 355    

 

◆ Main dimensions (extension type)

DN(mm) Upper flange Lower flange Sealing seat
D1 D2 D3 D4 D5 D6
FL41F/W-16
25 115 85 115 85 80 60
32 135 100 135 100 85 70
40 145 110 145 110 135 85
50 165 125 180 125 135 95
65 180 145 180 145 160 130
80 195 160 195 160 180 140
100 215 180 215 180 185 165
125 245 210 245 210    
150 280 240 280 245    
200 335 295 335 295    

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