Case Stories

Mechanical Seals Used In Various Applications

Working Together With Roplan

Blister damages to Carbon sealing surfaces

,
Cooling compressors are facing increased requirements and the end users were suffering repeated blister damages to the Carbon sealing surfaces. The use of solid Silicon Carbide seal faces was an interim solution, however end users were requesting…

Unique double gas lift-off seal in sour gas compressor

,
An OEM customer required gas lift-off seals for a sour gas compressor. However, available cavity was to small for a standard solution to be fitted. Through creative design work and extensive calculations, as well as verification in our test…

Erosion and clogging in china clay pumps

,
A customer specialized in the manufacture of pumps for china clay was suffering from short life time of the shaft seals, down to a few weeks. End users were not happy with the situation suffering from both down time and costs. After an analysis…

Mechanical seals being clogged up with bentonite residues

,
End users was facing issues with the mechanical seals being clogged up with bentonite residues being dissolved in the water being pumped. A Roplan design using a rubber protective guard with a maintained double balancing ensures the proper operation…

Critical pump failures solved with minimum downtime

, ,
One of the pump producer’s global customers was experiencing pump failures at their facility in China. The situation was critical and the end user demanded a solution ASAP. Roplan Ltd worked with the pump producers design engineering team…

Competence partner in customer unique Pod propulsion system

, ,
Due to changes is environmental regulations and performance expectations the customer needed to quickly develop a new Pod propulsion system. In additional to design changes many of the existing components, including the labyrinth lip seal with…

Custom floating static Mechanical Seal solve problem with axial movement

,
The customer had an end-user experiencing repetitive failures of the mechanical seal being used on a screw conveyor for mashed wood and steam feeding the refiner in a thermo-mechanical pulp application. Roplan was invited to find a solution…

Custom side entry mixer seals in Power plant scrubbers

,
An Original Equipment Manufacturer (OEM) addressing the growing Flue Desulphurisation Gas (FGD) market in China was experiencing short life time on the side entry mixer seals fitted to the scrubbers at the power plants. Power plant owners were…

Material upgrade due to compliance requirements

,
The customer was requesting a mechanical seal having the involved materials to comply with WRAS but with a maintained cost structure as present solution used. Working together with our suppliers we were able to present a solution that was meeting…

Custom Mechanical Seal required due to propulsion vibrations

, ,
Vibration levels in propulsion units can be extreme and the mechanical seals needs to be designed to handle these. A customer had end-users facing extensive wear of seal parts and as such premature failure occurred. The application was analysed…

Twin screw pumps (TSP) modified to meet EHEDG test

,
Twin screw pumps (TSP) are a challenge due to low speed pattern around the shaft seals. This in turn puts high requirements on shaft seal design and commonly moulded elastomers are required to ensure clean in place (CIP) procedures are successful.…

Solving Electro-chemical corrosion in high-speed equipment

,
Water for injection (WFI) is commonly used in the pharmaceutical process industry, however the very low conductivity of the media can cause electro-chemical corrosion of the Silicon Carbide when used in centrifugal pumps and other high-speed…