What should be paid attention to when the clamping shell coupling starts conveying medium

In general, the sandwich shell coupling delivers more acid-base media, but the viscosity of this kind of media is relatively low. The main reason is that we do not know enough about the medium delivered by the pump when choosing the clamping shell coupling, and the material selection of the coupling is not accurate enough. The gear of the general clamping shell coupling is made of 304 stainless steel or 2Cr13 material.

The clamping shell coupling is made of 304 stainless steel material for heat treatment or nitriding treatment, and the bearings are mostly made of stainless steel sleeve and steel back compound sleeve, and the main shaft is mostly made of 23Cr13. In fact, this material combination is fine for conveying lubricating medium, because the thermal expansion coefficient of 304 stainless steel is large. Manufacturers in the assembly of stainless steel pump generally considered affected by temperature increase, will cause the gear pump, holding in death of the phenomenon, holding shaft when assembling stainless steel pump so general clearance will be partial, due to the medium to low viscosity, combined with the internal clearance of the pump shit cause stainless steel spherical shell coupling not suck or the phenomenon of lack of capacity and head.

We need to pay attention to what medium it can transport when we use the shell coupling in daily use, for example, it can transport water and physical and chemical properties similar to water for other liquids. It is also more suitable for industrial and urban water supply and drainage, high-rise building pressurized water supply, garden irrigation, fire pressurization, long-distance transport, HVAC refrigeration cycle, bathroom and other hot and cold water cycle pressurization and equipment, the use of temperature T < 80℃. But if used for conveying containing impurities or lubricity and poor lubricity of dielectric material hardness is not big enough, the material of grinding and fatigue resistance is poor, in the case of a gear pump with high concentricity of the motor gear wear is a little slower, a little difference if the concentricity of the gear pump and motor then every part of the gear wear will be faster.