Carbon Ceramic Mechanical Seal

The role of the mechanical carbon differs with this high end mechanical seal and the resulting recipe is unique for these types of seals.

Carbon ceramic mechanical seal.

The seat is comprised of the seat and the gasket. 3 4 type 21 fluorocarbon ceramic vs. Ceramic standard on cast iron pumps. Most hvac applications maintain a ph from 7 0 to 9 0.

The mechanical seals provided by bell and gossett have stainless steel metals buna elastomers a 99 5 pure aluminum oxide ceramic stationary seal face and a carbon rotating face. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1. Systems with high ph levels. It reduces leakage between the pump and the surroundings to an absolute minimum.

Machine lapping is the production method of lapping mechanical seal faces. Carbon tungsten carbide ceramic silicon carbide chrome oxide stellite ni resist and phosphor bronze. In most applications carbon ceramic seals work fine but there are certain circumstances when a different type of material for the mechanical seal should be specified. Ceramic generally a 99 5 aluminum oxide offering excellent wear characteristics due to it s hardness.

Common types of mechanical seal face. As previously stated a pump with a through shaft is not leakproof. Carbon is also a critical component in some of the hard face materials used in mechanical seals because it combines with metals at high temperatures to form metallic carbides. Mechanical seals come in a wide range of designs however the most important factor when determining how long a seal is going to last.

Tion of a mechanical seal. Often called teflon r. The most common types of seal faces are. 3 4 type 21 buna carbon vs.

It is chemically inert and can be applied to nearly any product. They come furnished as two pieces the seal and the seat. These seals work well with the temperatures mentioned above and a ph neutral range of 7 0 9 0. For use in waste water boiler feed and compressor pumps these seals have an extra long spring that accommodates variations in seal cavity length.

The mechanical shaft seal is essentially a throttle arranged around the shaft. Once in a while the ph is too high for the carbon ceramic seal material. Overview of ceramic seal materials. Kemet lapping systems are used in both manufacturing and reconditioning processes.

The seal is comprised of the case spring diaphragm and washer which come locked together as one piece. Carbon is standard on 316ss pumps. This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators turbines compressors centrifuges and blowers. Mechanical shaft seals this section briefly describes the design and elements of the mechanical shaft seal.