graphite seal ring

Carbon vanes are important elements in dry running rotary and vacuum pumps as well as in wet vane-type pumps while liquids being pumped have poor lubricating features.
Owing to the low specific density of carbon material, the specific contact pressure exerted by the vane can be kept to a low level thus influencing vane life favorably.

The role of E.G.R valve is to flow exhaust gas again into combustion chamber. And E.G.R valve makes a pathway between an inhalation pipe and an exhaust pipe. It is a device to open and close the pathway. As the pathway opens, the exhaust constant pressure discharges. So the exhaust gas flows into the inhalation pipe which makes the combustion condition unstable. The reason of such instability is just to reduce Nitrogen Oxide(NOx) from the exhaust gas. The condition of generation of Nitrogen Oxide(NOx) is just when the combustion temperature gets higher.
E.G.R valve is used for the purpose that blocks the combustion re-circulating the exhaust gas towards the inhalation direction.
In brief, our E.G.R valve is well designed to operate with a most safe operation condition under partial load.

Carbon roller has given satisfactory results in a wide range of applications for machines.
They have particular advantages as follows.
- The working temperature rules out the use of conventional lubricating oil.
- Environment conditions prevent the use of liquid lubricants.
- The rollers run in a grease-solvent medium.
- Other roller materials can’t be installed owing to the danger of collision.

Vacuum pump of a camshaft direct driving manner has a strong durability and a low power consumption compared with an existing alternator driving manner. And it is designed to supply break boosters and servo-systems.