T09 - T-Ring valve with three functions: product diversion, isolation valve and pig catching station

This I.S.T. T-ring valve takes on 3 jobs at once: it acts as a branch in pigging system pipelines, incorporates a product isolation valve and also "catches" and "launches" pigs.

It can be used either as an independent station or integrated in a distribution assembly. The horizontal plane can be pigged without pockets when the valve is closed. The vertical port can be closed with the ring-shaped seal when necessary.

Pressure balanced seal design provides effortless movement of the valve ring, using only a small pneumatic cylinder. There is only minimal pressure drop when the product flow is diverted.


  • Three functions with one valve
  • Only minimal pressure drop
  • Excellent durable original I.S.T. quality
  • Suitable for Ex-areas
  • No residual product left in the pipeline
  • Pneumatic actuation
  • Compact size

Technical Characteristics

Nominal inside diameters DN 25-DN150 (DN 200 on request)
Flanges meet DIN or ANSI standards
Pressure up to PN 16, 150 lb. (other on request)
Temperature up to + 90°C, higher temperatures on request
Material cast steel or cast stainless steel body
Seal NBR, FKM (other on request)
Pneumatic cylinder for 6 bar of instrument air, with position indicator and spring return
Optional extras pig sensor, pig locator
If you need detailed specifications or have further questions, please do not hesitate to contact us.