Situation
Secluded pump system in Northern Germany with a twin screw pump to transport gas/oil mixture.
Successful application of DiamondFace mechanical seals in multiphase pumps
DF-SGR mechanical seals in gas/oil multiphase
Challenge
Complicated requirements and high amount of maintenance of the originally used unpressurized quench.
Solution
DiamondFace-coated DF-SGR mechanical seal for Bornemann twin screw pump.
Bornemann SLM multiphase pump
At 3.7 million tons a year, German production of crude oil covers about 3 % of domestic demand. The largest recoverable reserves are located in Northern Germany. Compared to other oil & gas producing regions, extraction and refining in Germany tend to be more challenging. Highly-optimized cutting-edge technology and processes along with very sophisticated extraction and refining equipment are needed to compete in the international marketplace.
The pump
An oil producer in Northern Germany uses a Bornemann SLM twin screw pump to transport the oil/gas mixture. The relatively compact pump has two mechanical seals.
Originally, a competitor’s double seal with barrier fluid circulation system based on API Plan 54 was installed. However, this solution required a lot of maintenance, which caused high personnel involvements for upkeep and made things difficult for the user.
As the pump system is located in a remote wooded area which is not easily accessible, it was in the customer’s interest to find a solution which reduces maintenance effort to a minimum. Bornemann and EagleBurgmann were aware of the problem. A proposal was made to the user to carry out a field test with a new EagleBurgmann sealing solution. The competitor’s seals were replaced.
EagleBurgmann Type SGR mechanical seal
Following the retrofit using an SGR with unpressurized quench and a DiamondFaces coating, the customer benefited from a significant, sustained reduction in maintenance and monitoring activity. When the radial shaft sealing ring (not supplied by EagleBurgmann) on the pump failed after one year, the system was checked over and EagleBurgmann suggested operating the seal without quench.
With the DiamondFace coating on the seal faces and 5 % residual lubricating oil content in the medium, the seal has been running in the safe temperature range without leakage, and the user is fully satisfied with the results.
Yellow parts = rotating, blue = stationary, gray = housing
- Medium: oil/gas mixture … 95 % gas content
- Temperature: t = +10 °C (+50 °F) suction side,
- +30 °C … +40 °C (+86 °F … 104 °F) pressure side, at the seal
- Pressure: p = 2 … 3 bar (29 … 44 PSI) suction side
10 … 11 bar (145 … 160 PSI) discharge side, at the seal - Speed: n = 2,700 … 2,800 min-1
- Seal incl. materials: DF-SGR1/55-E3,
Q15Q15VGG (1.4571) - Seal type: single seal
DiamondFace-coated mechanical seal for multiphase pump
Download the solution flyer
Sealing solutions for multiphase pump applications
Download the brochure
Further reference projects
Germany
100 percent performance at 300 degrees
Things get hot in rotary kilns, very hot in fact. In the production of cement, for example, the thermometer measures more than 1,000 degrees Celsius. Sealing systems from EagleBurgmann, a company of the Freudenberg Group and EKK, make sustainable contributions to environmental protection, energy efficiency and process reliability under these "fiery" high-temperature conditions.
Finland
Does not blow off steam
A boiler circulation pump in a power plant conveys very hot and pressurized water. The pump has no cooling jacket, which increases the risk of a thermosiphon effect.
Germany
For a good night’s sleep
Pharmaceutical manufacturers like the Bayer AG rely on mechanical seals in their manufacturing plants.
Norway
Mixing without risk
When the process medium in the production of metformin may not be contaminated with sealing medium under any circumstances, gas-lubricated seals for agitator shafts are the first choice. The Norwegian company Vistin Pharma took a daring step away from oil-lubricated to nitrogen overlayed seals.