Safety measures Dry Seal for tandem / Dry Seal for stirrer
By arranging the "Safety Barrier Seal" on the backup seal on the atmosphere side, the safety measures and environmental measures of the Mechanical seal can be realized at a lower cost than the reservoir tank type tandem seal.In addition, even if a temporary leak occurs when the vertical LPG pump is started, it can be started quickly without stopping.
Furthermore, the Safety Barrier Seal is not only used as a tandem seal, but also as a main dry seal for stirrers, etc. because it hardly leaks in the low pressure region. It supports high peripheral speed conditions that were possible.
[Patent registration number: 2113552]
Furthermore, the Safety Barrier Seal is not only used as a tandem seal, but also as a main dry seal for stirrers, etc. because it hardly leaks in the low pressure region. It supports high peripheral speed conditions that were possible.
[Patent registration number: 2113552]
Features
Compatible with both gas and liquid
Demonstrates excellent sealing performance not only for gases but also for liquids.
No need for N2 gas purging
It can be operated without N2 gas purging.
* Please use N2 gas purging to prevent freezing in low temperature specifications.
* Please use N2 gas purging to prevent freezing in low temperature specifications.
Effect
Reduction of equipment costs
Compared to the reservoir tank installation cost, the equipment cost is reduced to about 1/3.
No need to manage seal liquid
There is no need for maintenance associated with the management of the sealing liquid required for the reservoir tank.
Operation can be continued against temporary leakage
Since the gas inspection does not issue a temporary leak at startup that may occur with a vertical LPG pump, etc., operation can be continued and there is no need to open and inspect the mechanical seal.
Simple ancillary equipment
There are many examples of use without N2 gas purging, and the incidental equipment is simple and the causes of equipment failure are reduced. (Please refer to the flow chart comparison below)
Construction
Tandem specifications | Main seal specifications for stirrer | |
Shaft diameter | ~ Φ120 | ~ Φ130 |
pressure | Normal pressure: 0 to 1 MPa Sudden response pressure: ~ 5MPa | (~ 0.8MPa) |
Peripheral speed | ~ 15m / sec | ~ 10m / sec |
Safety Barrier Seal usage example
Instead of the conventional tandem seal using the reservoir tank method, the Safety Barrier Seal, which can be operated dry, limits leakage to the atmosphere and eliminates the need to install an expensive reservoir tank.It is used as a simple tandem seal.
"pump"
Combustible fluids such as LPG / ethylene / propylene, toxic fluids such as benzene, hot oils such as hot naphtha
《Stirrer》
Air, methylene chloride, medical powder + ethyl alcohol
"pump"
Combustible fluids such as LPG / ethylene / propylene, toxic fluids such as benzene, hot oils such as hot naphtha
《Stirrer》
Air, methylene chloride, medical powder + ethyl alcohol
Typical example of pump
Prevents leakage to the atmosphere even during unstable startup, and continuous operation is possible without issuing an alarm.
Typical example of a stirrer
