Screw seals: Also known as screw mechanical seals with water flushing for high viscosity melts and dynamic seals with positive inlet pressures. The purpose of the water cooling is that the material solidifies when cold, thus making it less likely to bubble.
Packing seal: A very simple and robust shaft seal that can be used when the material viscosity is relatively low. If the viscosity of the material is large, it is necessary to consider the use of spiral seal or other more efficient sealing methods. Commonly used packing materials for graphite and reinforced fibers made of woven packing, but also according to the need to choose other special materials.
Mechanical seals: including single mechanical seals and double mechanical seals, its structure is mainly composed of dynamic ring, static ring, elastic device, auxiliary seals and shell. The materials of the dynamic ring and static ring are chosen diversely to meet the needs of different media. Spring device to the appropriate spring ratio pressure to maintain the dynamic and static ring end face buffer contact, and auxiliary seals have a variety of types, such as O-ring, V-type, square ring, trapezoidal ring.
Magnetic Seal: Utilizing the principle of magnetic force to realize non-contact sealing, which is suitable for some special working conditions.
In addition, spiral + packing seal, three-layer combination seal, lip seal + packing combination seal, etc. is also a common sealing method of melt pump oh.
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