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How to choose the characteristics of the silicone rubber hose for the pump and the choice of the properties of
Silicone rubber hose: also known as the pump hose, the use of platinum sulfide process of extrusion molding, eliminating the other way of curing
Often encountered in the problem of precipitation, relative to food safety improvement. In life may not see much, small make up on a simple introduction
Under its characteristics and how to choose.
First of all, the characteristics of the silicone rubber hose of the pump:
1 with a certain degree of elasticity, the flexible hose can quickly restore the shape (Shore hardness: 40 to 80).
2 has a certain wear resistance.
3 ability to withstand pressure.
4 no leakage (good air tightness).
5 low adsorption resistance, temperature resistance, not easy to aging, swelling, corrosion resistance, low precipitation.
Secondly, in the selection of a silicone tube with a pump to pay attention to the following conventional indicators:
1 Chemical Compatibility
For pumping corrosive fluid peristaltic pump selection, the key is to choose the right tube material. The wrong pump will cause danger, there is
May damage equipment and endanger human body safety. Please use the query for each chemical pump and pump manufacturers compatibility table.
Experiments using a new or non - labeled chemical material. A short tube immersed in fluid. Check the pump
Changes in size, color, weight and strength. If possible, in the tensile test using the pump before the pump in the pump tube
. Pump by extrusion during bending, will rub chemicals into the wall of the pipe, accelerated aging disintegration.
2 no pollution
In many applications such as laboratory research, pharmaceutical, biotechnology products production, fluid isolation is very important. Already large
The amount of silicone tube and silicone material will not react with various biological materials. There are other types of material.
Material also has this kind of performance, and can achieve Class VI USP level requirements. Some pumps are made of inert PTFE pipe system.
The pump assembly.
Note: after a long run, some of the particles in the pipe will be separated into the fluid. Experts call this "peel off"
". In some applications, the particles can be observed with the naked eye. In order to reduce the phenomenon of peeling off, we should increase the replacement
Frequency of pipe.
3 flexural capacity
The ability of different pipe roller under repeated rolling are also different. Generally speaking, tubing size, pipe material, pump head specific
Combination type, and the running speed of the several parameters determines the service life of the pump. The pump service life, or in the pump in torsion
The yield limit is the first consideration of the new application. Today, thermoplastic synthetic rubber (TPE) is used in the system.
The operating life of pump, has more than 500 hours is a very unusual thing.
In a specific application, the performance of the pump is very stable. Selection of resistance to bending of the larger pipe, the use of thicker tubes
Wall and / or pick the use of large pump and low running speed can maximize the use of pump mission.
4 clarity
For some applications, it can be used to observe the movement of the fluid through the pipeline.
Is very valuable. But on the other hand, the opaque tube is good for some of the photosensitive fluid.
5 hardness tester
The hardness of the pipe wall is very important for determining the pumping capability of a certain pipeline. The pump is too soft, easy to damage the pump; pump too hard.
Not working. The physical properties of a specific pipe can be determined by a hardness tester (such as A Shore, etc.).
6 fluid pressure
The ability of the pressurized fluid to fluid pressure usually hinders the pump. Most of the use of the non support of the pump pipe. This kind of pump
The pressure limit of the tube is 3 to 2 bar (30 to 45 lb / inch). Some of the larger pumps on the market with the support of the pipeline
(reinforced with woven fabric). Soak in the lubricant pump can withstand up to 15 to 20 bar (300 pounds per inch square) pressure
Power
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