Carbon Ceramic Mechanical Seal

Machine lapping is the production method of lapping mechanical seal faces.

Carbon ceramic mechanical seal.

Mechanical seals come in a wide range of designs however the most important factor when determining how long a seal is going to last. Most hvac applications maintain a ph from 7 0 to 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. As previously stated a pump with a through shaft is not leakproof.

Common types of mechanical seal face. Ceramic cannot however handle the thermal shocks don t drop them that ni resist or 17 4 seats can. 3 4 type 21 fluorocarbon ceramic vs. The most common types of seal faces are.

Carbon is standard on 316ss pumps. The seal is comprised of the case spring diaphragm and washer which come locked together as one piece. Systems with high ph levels. Often called teflon r.

The majority of seals used in pumps are typically carbon ceramic. 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. Carbon tungsten carbide ceramic silicon carbide chrome oxide stellite ni resist and phosphor bronze. They come furnished as two pieces the seal and the seat.

Carbon ceramic ni resist 17 4 silicon carbide tungsten carbide gfptfe glass filled ptfe. It reduces leakage between the pump and the surroundings to an absolute minimum. The seat is comprised of the seat and the gasket. Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1.

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. These seals work well with the temperatures mentioned above and a ph neutral range of 7 0 9 0. Once in a while the ph is too high for the carbon ceramic seal material. Overview of ceramic seal materials.

Mechanical shaft seals this section briefly describes the design and elements of the mechanical shaft seal. It is chemically inert and can be applied to nearly any product. 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. Kemet lapping systems are used in both manufacturing and reconditioning processes.

Ceramic standard on cast iron pumps. The mechanical shaft seal is essentially a throttle arranged around the shaft. The role of the mechanical carbon differs with this high end mechanical seal and the resulting recipe is unique for these types of seals. 3 4 type 21 buna carbon vs.