Pneumatic discharge valve features:
Pneumatic discharge ball valve is a special structure of the discharge ball valve , the valve seat and the flange near the end, less material retention, compact structure, superior sealing performance, for fine chemicals, pharmaceuticals, chemical industry reaction pan can also be used in Fine granular media delivery. The use of PPL sealing material, more wear-resistant, toothpaste industry is the best vacuum system paste pan discharge products.
Pneumatic discharge ball valve is used with a circular channel for the opening and closing of the ball, the ball with the valve stem to open and close the valve action, the opening and closing pieces is a perforated ball, perpendicular to the axis of rotation of the channel so that Reach the goal of opening and closing channels.
Pneumatic discharge ball valve structure
Pneumatic discharge ball valve product structure and principle
Structure and principle:
(1) body
(2) bracket
(3) Handwheel: Ball black cast iron
(4) Spool: enamel
(5) rubber gasket
(6) PTFE perforated plate
(7) packing: PTFE seals
(8) pressure cover sub: cast iron
(9) screw, (10) stem nut: cast iron
(10) Suitable for the design pressure P ≤ 0.6MPa, working temperature t ≤ 1500C glass-lined discharge valve.
Pneumatic discharge ball valve technical conditions should be consistent with the provisions of HG5-16-79. This valve phosphorus and phosphorus light medium, hydrofluorocarbon, hydrochloric acid, sodium hydroxide, potassium hydroxide outside the various acid, alkali, salt solution and organic solvents.
Pneumatic discharge ball valve main dimensions and connection dimensions Unit: (mm)
Pneumatic discharge ball valve classification
Nominal pressure
Symbol PN, the maximum allowable working pressure at a given temperature. The control valve for carbon steel body refers to the maximum working pressure allowed for applications below 200 ° C .; for cast iron bodies, the maximum working pressure allowed for applications below 120 ° C; for stainless steel body valves, The maximum allowable working pressure when applied. When the working temperature increases, the body pressure will be reduced. For example, a carbon steel control valve with a nominal pressure of 6.4 MPa (PN64) has a pressure resistance of 5.2 MPa at 300 ° C, a pressure of 4.1 MPa at 400 ° C, a pressure of 2.9 MPa at 450 ° C .
Called the pressure valve body material
Cast steel, stainless steel, 316L. Working pressure 0.6-2.5MPA, working temperature -20 ℃ -425 ℃. Valve diameter DN25-DN300. Connection: Flange. Transmission: manual, pneumatic. Applicable medium: oil, acids, corrosive media. Manufacturing standards: GB.
Manual discharge valve is mainly used for bottom discharging, discharging, sampling and no dead zone shut-down operation of reactors, tanks and other containers. With the help of the bottom flange of the valve welded to the bottom of the tank and other containers, thus eliminating the process medium usually in the container outlet of the residual phenomenon.Discharge valve according to the actual situation, the bottom structure design for the flat type, the body is V , And to provide promotion and fall of two kinds of work disc. The body cavity is resistant to erosion, corrosion-resistant seals, the valve can be opened at the moment, you can protect the body from medium erosion, corrosion, and special treatment of the ring, the surface hardness of HRC56-62, with high wear resistance, Corrosion-resistant function, the valve flap seal as needed are covered with hard alloy cover, sealing the use of line sealing, to ensure the reliability of the seal, and to prevent scarring. At the same time take a short stroke valve design.
Nominal diameter DN
Discharge valve rated flow coefficient KV, discharge valve nominal pressure and pressure, discharge valve body and valve components, discharge valve flow characteristics, discharge valve temperature, discharge valve supply voltage and control signal, put Whether the material valve with accessories.
First, the nominal diameter: (nominal diameter), also known as the average diameter (mean outside diameter), said the symbol DN, is a variety of pipe and pipe fittings common caliber. Pipe and pipe fittings of the same nominal diameter can be connected to each other and are interchangeable. It is not a pipe diameter or an inner diameter in the actual sense. Although its value is close to or equal to the pipe inner diameter, in order to make the pipe and pipe fittings uniform in size , Using the nominal diameter (also known as nominal diameter, nominal diameter). For example, the thickness of welded steel pipe can be divided into thin-walled steel pipe, ordinary steel and thick steel pipe. The nominal diameter is not the outer diameter, nor the inner diameter, but similar to the nominal diameter of a common pipe size. Each nominal diameter, corresponding to an outer diameter, the diameter of the value varies with the thickness of different. Nominal diameter available metric mm said, can also be used in English said. Pipe fittings are also used to indicate the nominal diameter, meaning the same seam pipe.
Pneumatic discharge valve common fault
1, potassium carbonate liquid uniformity is poor. Caused by the feed tube is blocked, the formation of intermittent feeding phenomenon, so that the centrifuge vibration.
2, the angle of the discharge valve can not be adjusted, centrifugal drum speed too fast. Materials to overflow when the material overflow, easy to burn the human body (potassium carbonate liquid temperature at about 70 ℃);
3, discharge valve is located at the top of the centrifuge. To tilt when discharging. Not easy to operate.
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