Findings: Three types of globe valves and selection guides

There are several commonly used globe valves: 1) DC globe valve: In the DC or Y-type globe valve, the flow path of the valve body is inclined with the main flow path, so that the damage of the flow state is smaller than that of the conventional globe valve , So the pressure loss through the meter valve is also a corresponding small. 2) Angle valve: In the angle valve, the fluid only needs to change direction once, so that the pressure drop through this instrument valve is smaller than that of the conventional structure. 3) Plunger globe valve: This type of globe valve is a variation of a conventional globe valve. In this instrument valve, the valve disc and valve seat are usually designed on the principle of plunger. Polished valve plunger into a plunger connected with the stem, the seal is set by the plunger in the two elastic ring to achieve. The two elastomeric seals are separated by a collar, and the seal around the plunger is pressed firmly by the load exerted by the bonnet nut on the bonnet. Elastomer seals are interchangeable and can be made from a wide variety of materials. The meter valve is intended primarily for "on" or "off," but with a special form of plunger or special collar that can also be used to adjust flow. Globe Valve Selection Guide Stop valve stem axis and seat sealing surface perpendicular. Valve stem opening or closing stroke is relatively short, and has a very reliable cut off action, making this instrument valve is very suitable as a medium cut off or adjust and throttle use. Once the valve flap of the globe valve is in the open condition, its valve seat and valve flap seal face no longer contact with each other, and has a very reliable cut-off action. The instrument valve is suitable for this as a medium to cut off or adjust and Throttle use. Once the stop valve is open, its valve seat and disc seal surface no longer have contact between, and therefore its sealing surface mechanical wear and tear less, as most of the valve seat and the disc valve is relatively easy to repair or replacement Sealing components eliminates the need to remove the entire meter valve from the pipeline, which is a good fit for instrument valves and pipe welding. The flow direction of the medium as it passes through such meter valves has changed, so the flow resistance of the shut-off valves is higher than that of other meter valves.

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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