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API682 seal system for Russian chemical plant


One of the most complex seal systems ever designed and produced by K T Hydraulics is now installed as part of a critical process redevelopment at the Nevinnomyssky Azot chemical plant in Nevinomyssk, Russia.

The seal system, produced for a Burgmann seal fitted to a Flowserve pump, was manufactured completely in 316 stainless steel to cope with the corrosive chemical environment in which it will operate at the urea processing plant.

The pump was required as part of a process technology revamp at the Nevinnomyssky Azot plant in Russia by chemical engineering process specialists Urea Casale. The revisions being made to the existing technology are aimed at improving output and product qualiy whilst reducing pollution, power and steam consumption.

Due to the nature of the process, the low ambient temperature and the steam condensate media flowing through the pump, it is critical that this seal system is able to provide accurate regulation of both temperature and pressure within the seal housing and media chamber of the pump. 

The API682 Plan 54 seal system supplied to Burgmann Netherlands by KTH maintains the shaft seal by holding a greater pressure than that exerted by the process media at all times from start-up to full speed continuous running. The system also plays an important part in regulating temperature through the pump; were the temperature of the steam condensate to drop too low, the urea would begin to crystallise, which in turn could damage and ultimately destroy the pump shaft seal.

Due to the final destination of the equipment, the KTH seal system was supplied with full GOST certification to cover design, materials, manufacture and testing. Following installation and commissioning earlier this year the seal system is now in operation on site at the Nevinnomyssky Azot plant, which is back in production following completion of the process revamp work.

“From the criticality of temperature and pressure control right through to the requirements of the GOST certification, this system has been one of the most complex pieces of work we have tackled,” comments KTH managing director Richard Ellis. “Once again however, through our design input, project management, understanding of the API standards and seal performance we have demonstrated capabilities to our OEM clients that very few other hydraulic system manufacturers can match.”

API682 Plan54 seal system in 316 stainlessAPI682 Plan 54 seal system in 316 stainless    API682 Plan 54 seal system for Nevinnomyssky Azot  

 

 

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With many years of experience in design and manufacture to API standards including API Standard 614, Lubrication Shaft-Sealing and Control-Oil Systems for Special-Purpose Applications, 5th Edition, we have an in -depth understanding of the requirements and implications.

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