Logic valve in the practical application of precautions

In the selection, should be based on system traffic, greater than or equal to 200l / min use two-way cartridge valve, less than 20l / min is the choice of threaded cartridge type. Cartridge assembly cartridge with tail and without tail form, with the tail of the buffer and throttle and so on. There are a variety of valve core area ratio to choose from, the spring also has a variety of stiffness to choose from, in order to achieve a variety of opening pressure. String 2 Some domestic plug-in assembly with O-ring between the valve plug and sleeve, which can ensure the seal, but the reaction speed. Damping holes in the control cover and the spool have a variety of diameters, large damping reaction hole reaction speed, but the impact of a large, small damping holes on the contrary. If the action will have an impact on the function of the system, the diameter of the orifice should be chosen with particular caution. There are many types of control covers and should be carefully selected according to the system. When designing the valve block, draw the positioning hole on the cover and designate the code of each port for assembly and maintenance. Should be based on system flow and pressure and flow - pressure curve selection, too small will often result in system pressure loss is too large, the system fever, if the selection is too large, it will make the system huge, resulting in economic waste. There are two kinds of sealant string 3 optional, fluorine rubber seal suitable for phosphate media, nitrile rubber seal suitable for mineral oil media. Because of its high pressure and high flow characteristics of the valve is particularly suitable for rapid hydraulic drive, both at home and abroad have mature products, rapid application of hydraulic actuators in the valve is promising.

Rotary Tablet Press

Classification of tablet press: Models can be divided into single punch tablet press, rotary tablet press, sub-high speed rotary tablet press, automatic high speed tablet press and rotary core tablet press.

The sheet shape pressed by the tablet press is initially flat circular, and later developed into shallow circular arc and deep circular arc on both sides, which is for the need of coating. With the development of special-shaped tablet press, oval, triangle, oblong, square, diamond, circular ring tablets followed. In addition, with the continuous development of preparations, due to the requirements of compound preparations and timed release preparations, special tablets such as double layer, triple layer and core coating are made, which need to be completed on special tablet press.

Rotary tablet press is a machine which is made of several pairs of die distributed on the turntable to make a circular lifting movement according to a certain track and press the granular material into tablet through the press wheel. And the stamping rod with the rotary table rotating speed ≥60m/min line press is called high-speed rotary tablet press, this high-speed rotary tablet press has a forced feeding mechanism, the machine is controlled by PLC, has the automatic adjustment of pressure, control the weight of the piece, eliminate the waste piece, print data, display fault shutdown and other functions, in addition to the control of the weight difference within a certain range, Quality problems such as missing Angle and loose lobe can be automatically identified and eliminated.

With the development of market demand, the scope of application of tablet press is more and more wide, no longer simply limited to the suppression of Chinese and Western medicine tablets, more widely suppressed health food, veterinary medicine tablets, chemical tablets: such as mothballs, washing blocks, smurf blocks, art powder, pesticide tablets, food tablets: chicken essence block, isatis root block, divine Qu tea block, compressed biscuits.

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