Dry gas seals

API 682 Standard

Did you know that as per API 682 Standard, a single mechanical seal is called Arrangement 1 Seal, a tandem mechanical seal is called Arrangement 2 Seal, and a double mechanical seal is called Arrangement 3 Seal?

Products

Gas seals

Dry gas seals

 

Product Description
SGDU 210 Compact dry gas seal
SGDU 220 Dry gas seal with zero speed lift-off and diamond coated faces
Control panels Control panels (seal systems) - supply gas, often N2 (Nitrogen), and ensure stable operation of the gas seals. If other than N2 gas is used as barrier gas, it should be filtered and condensate should be removed.

See also:

 

Use of dry gas seal in centrifugal compressors has increased dramatically during the last 20 years because these seals provide many benefits for the end user. In gas seals lubricating oil is not used, thus it can no longer contaminate the process.

All manufactured dry gas seals are run on test rigs at working parameters as well as beyond them (speed). Customers are welcome to visit our facility for a witnessed test. The procedure is as per API 617 Standard.

For compressors at GAZPROM’s natural gas pipeline transportation and distribution network, TREM Engineering has designed two series of dry gas seals:

  1. SGDU 210 Gas Seal – for compressors NC-16 series (16 MW) – a compact gas seal with traditional carbon vs tungsten carbide faces.
  2. SGDU 220 Gas Seal – for compressors PCL 804 series – a gas seal with diamond coated silicon carbide faces with varying depth of grooves.

For compressors at oil refineries and petrochemical plants, SGDU 210 Gas Seal is recommended.

In addition to complete new seals and control systems, a package to upgrade a compressor from "wet" oil seals to dry gas seals is available. In this very popular package, besides seals, engineering, control panels and necessary new parts are included.

 

The following compressor sealing products are manufactured:

  • Tandem seal, with additional labyrinth seal or without it
  • Double seal, with additional labyrinth seal or without it
  • Triple seal for extra clean processes (combination of tandem and double seals so that nitrogen does not get into the process, but the process gas does not get into the bearing / shop atmosphere as well)
  • Single seal
  • Rigid radial and thrust bearings (useful when upgrading from oil mechanical seals)
  • Control panels, Emerson (Fisher/Rosemount) based (useful when upgrading from oil mechanical seals or for supply to OEM).

    • In addition, nitrogen generation, air supply systems and temperature & vibration monitoring systems can be offered.

     

    The following projects were implemented in recent years:

     

    2008-2009: Complete compressor sealing systems (upgrade from wet seals to dry gas seals) at

     

  • Oil refinery at Angarsk Petrochemicals (Rosneft), Russia
  • Angarsk Polymer Plant (Rosneft), Russia
  • Atyrau oil refinery (KazMunayGas oil company), Kazakhstan.

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    2009: Dry gas seals to replace original seals at

     

  • TAIF-NK Oil Refinery, Russia.

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    2007 and before: Complete compressor sealing systems (upgrade from wet seals to dry gas seals) at

     

  • Syzran Oil Refinery, Russia
  • Omsk Oil Refinery, Russia
  • Mozyr Oil Refinery, Byelorussia.

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    2007 and before: Dry gas seals to replace original seals at

     

  • Omsk Oil Refinery, Russia
  • Nizhnekamsk Oil Refinery, Russia
  • Gazprom’s Zavolzhskaya natural gas transfer station
  • Rosneft - Komsomolsk Oil Refinery.

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    A number of other manufacturers’ dry gas seals has been repaired (the list available upon request).