1. No flushing fluid circulation and one end of the sealing cavity is closed
2.It is generally used in the chemical industry when the pressure and temperature of the sealing chamber are low.
3. Usually used to transport the medium is relatively clean conditions.
4, from the pump outlet through the flow limiting orifice to seal the cycle process. The flushing liquid enters the sealing cavity near the mechanical seal end face, washes the end face, and then goes back through the sealing cavity to the pump.
5.Flushing scheme 11 is the standard flushing scheme for all single face seals and clean working conditions.
6, from the pump outlet through the flow limiting orifice to seal the cycle process. The flushing liquid enters the sealing cavity near the mechanical seal end face, washes the end face, and then goes back through the sealing cavity to the pump
7.Washing scheme 11 is the standard washing scheme for all single end seals and clean working conditions.
8. In the case of a vertical pump without a drain hole, the sealing chamber pressure is usually the outlet pressure, so there is no differential pressure in this arrangement to allow Plan11 to operate.
10. It is also used in the case of high head. In this condition, the pipe hole is very needed
Small volume
11, from the pump outlet through the flow limiting orifice plate and heat exchanger and then into the sealing cavity of the cycle process.
12, from the pump outlet through the flow limiting orifice plate and heat exchanger and then into the sealing cavity of the cycle process.
13. A kind of cooling wash is provided. This flushing scheme is used to increase the steam refining margin, meet the temperature limit of the attached sealing element, reduce coking polymerization, and improve lubricity (heat).
The advantage is that it not only provides cooling flushing but also has enough pressure difference to ensure good flushing flow rate. The disadvantage is that the heat exchanger is heavy, the cooling water side is easy to scale and block: when the viscosity of the process fluid side is very large, it is easy to block. Circulation from the outlet of the sealing chamber through the heat exchanger back to the sealing chamber This flushing arrangement can be used in a higher temperature environment to minimize the heat load of the heat exchanger by cooling only a small part of the circulating liquid
14, suitable for high temperature condition flushing scheme, especially for boiler water supply and delivery of hydrocarbons. This flushing scheme is the standard flushing scheme for 80C and above boiler water supply.
Post time: Mar-29-2023