This is commonly seen in centrifugal pumps although this challenge also exists in other equipment such as agitators turbines compressors centrifuges and blowers.
Carbon ceramic mechanical seal.
Systems with high ph levels.
Often called teflon r.
Ceramic cannot however handle the thermal shocks don t drop them that ni resist or 17 4 seats can.
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.
Ceramic generally a 99 5 aluminum oxide offering excellent wear characteristics due to it s hardness.
Carbon tungsten carbide ceramic silicon carbide chrome oxide stellite ni resist and phosphor bronze.
The mechanical shaft seal is essentially a throttle arranged around the shaft.
Carbon is standard on 316ss pumps.
Machine lapping is the production method of lapping mechanical seal faces.
It is chemically inert and can be applied to nearly any product.
Kemet lapping systems are used in both manufacturing and reconditioning processes.
The role of the mechanical carbon differs with this high end mechanical seal and the resulting recipe is unique for these types of seals.
Most hvac applications maintain a ph from 7 0 to 9 0.
The seal is comprised of the case spring diaphragm and washer which come locked together as one piece.
3 4 type 21 fluorocarbon ceramic vs.
Seal basics a mechanical seal is a device used to seal the interface between a rotating shaft and a stationary housing figure 1.
These seals work well with the temperatures mentioned above and a ph neutral range of 7 0 9 0.
3 4 type 21 buna carbon vs.
It reduces leakage between the pump and the surroundings to an absolute minimum.
Tion of a mechanical seal.
The majority of seals used in pumps are typically carbon ceramic.
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.
Carbon ceramic ni resist 17 4 silicon carbide tungsten carbide gfptfe glass filled ptfe.
Mechanical seals come in a wide range of designs however the most important factor when determining how long a seal is going to last.
For use in waste water boiler feed and compressor pumps these seals have an extra long spring that accommodates variations in seal cavity length.
Common types of mechanical seal face.
Overview of ceramic seal materials.
As previously stated a pump with a through shaft is not leakproof.
Once in a while the ph is too high for the carbon ceramic seal material.
Mechanical shaft seals this section briefly describes the design and elements of the mechanical shaft seal.
The seat is comprised of the seat and the gasket.
The most common types of seal faces are.
