Sanitary pump material selection, commonly used is austenitic stainless steel (316L/304), fluoroplastic, ultra high molecular weight polyethylene, ceramics, glass and so on.
For high clean material, such as distilled water pump, the flow components of ultra-low carbon austenitic stainless steel.
Sanitary pump with different materials and ordinary materials.
Because the pump material is not only corrosion resistant, but also need not exudate harmful elements/substances, can not absorb the deterioration of the media.
Sanitary pump production in addition to the need for ordinary stamping pump equipment, but also should have advanced welding and polishing equipment.
 

There are many types of sanitary pump, which is due to the transmission of the medium of the diversity of the decision.
From clean direct drinking water to milk, jam.
These materials are acidic, alkaline.
There's the good stuff and there's the hard stuff.
What are the advantages and disadvantages of centrifugal and screw sanitary pumps introduced here?
The main types of sanitary pump are: centrifugal pump, CAM pump, single screw pump and sanitary stainless steel gear pump.
Their design method is largely the same as the ordinary pump.
But it is not completely the same, here the main centrifugal pump as an example to briefly illustrate the need to pay attention to a few points.

1. Comply with CIP requirements.
Most production filling lines require a daily rinse.
Wash away any residue that may spoil or produce bacteria.
Many use clean water for pumping or backwashing over a period of time.
This is related to the no dead Angle.
In a washing period, the parts of the media flow slower (such as materials in the sealed cavity) should all flow out.

2, conform to the requirements of the COP.
This requires a simple disassembly of the pump (such as the rear door pump bearing box and rotor parts being removed from the pump body).
High pressure washing water can be directly to the surface of the wash.

3. Meet the SIP requirements.
Online disinfection besides using a gamma ray sterilization, high temperature water/steam is also commonly used.
The sterilization temperature is generally above 121 degrees.
Using steam sterilization sanitary pump need to be able to withstand the high temperature (including packing).
Using hot water (121 above the water, it must needs certain pressure to stay liquid) pump need to bear high temperature and pressure.

4, no dead Angle in the flow.
In the food preparation process, where the medium comes into contact with the pump.
These media need to be fluid.
In the ordinary pump mechanical seal cavity is often a dead Angle, this time need open or conical sealed cavity.

5. The surface roughness of the weld shall be up to 3.2, and the general surface shall be up to 0.8.
That is to say, the pump body and impeller runner need to be polished.
Ordinary cast parts are difficult to meet this requirement.
So the general use of centrifugal health pump stamping welding structure.
Sometimes, the impeller is open or half open.