Swivel joint 50-300

Swivel joint PST renders possible to make rigid pipe construction flexible. If using one flex joint equipment moves on 360 degrees in one plane. If using three flex joint equipment moves in three planes. PST is full bore flex joint is provided minimal drop of pressure. Joint is for wide production range.

Construction features

  • Ball and cone bearing combination provides high load capability of joint.
  • Engineers can replace flex joint grummet without bearing breaking-off.
  • Double sealing protects ball bearing cell from leakage if general grummet damage.
  • Control sealing between flex joint grummets and bearings.
  • Dust-proofing ejects solid particles entry.
  • Bearing is crowded by conducting long-life performance lubrication, so it is not necessary in constant maintenance.
  • There is galvanic coupling wave guide according to electrosafety requirements.
  • Bearing construction provides it inner and external sealability.


External race 03Х11N10М2Т
Inner race 03Х11N10М2Т
Flange 12Х18Н10Т
Sealing gummet fluorine plastic-4-1, aviation petrol- and oil-resistant rubber
Other data
Internal drift diameter, mm 50, 75, 80, 100, 150, 200, 250, 300
Maximal operational pressure 10 kGs/сm2
Environmental temperature -50°С … +50°C
Operational liquid temperature -10°С … +90°C
Lifelengh before gummet lose sealability full turns at least 1 000
Durability at least 9 000 hours
Total service life 10 years
Bearing lubrication All Season
Maximal rotation angle, degrees 360
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