Zwick – Tri-Con Triple Offset Oxygen ValvesEnquire Now

Zwick 8211 TriCon Triple Offset Oxygen ValvesZwick 8211 TriCon Triple Offset Oxygen Valves

BRAND: ZwickCATEGORY: Control Valves, Triple Offset Valves,

The Zwick Tri-Con triple offset valve for oxygen service complies with all applicable international standards. Also known as triple eccentric valves or triple offset butterfly valves, the unique design offers zero leakage which is made possible by true cone-in-cone seating design which ensures frictionless opening and closing with lowest torques and without a break-away torque.

The robust design makes the Tri-Con the ideal rotary solution for isolation, on/off and control in today’s demanding process industry. The most popular configuration is double flanged even though wafer, lug, but weld and gate valve face to face are all readily available. Zwick’s proven design provides 100% tightness in gas services enabling it to be used for critical liquid and gas services.

Our Valve Repair Centres in Secunda and Durban provide a full valve repair and reconditioning service as well as valve automation to assemble and test your valve packages.

There are hundreds of valves installed in South Africa today in industries like synthetic fuels, oil & gas, chemical and power generation.

Contact one of our technical specialists for a quote today or download the brochure to learn more!


SeriesTri-Con Oxygen Service

Triple Offset / Triple Eccentric Rotary Valve

  • ZERO leakage bi-directional shut-off
  • Resilient metal to metal seats
  • EIGA conform
  • Gas tight
  • Fire safe
  • Low Aluminium content
  • High strength copper brass
  • Quarter turn friction free operation – No seat rubbing
  • Self-centering torque seated disc – True cone in cone sealing
  • Temperature compensating – No shaft to disc pins
  • Supported bearing bushing for optimal shaft support
  • Anti blow-out shaft

50mm to 900mm / 2” to 36”


PN16 – 250 / ANSI 150 – 900

Temperatures-50°C to +250°C
Double flanged

Monel / High Strength Copper Brass

Monel / High Strength Copper Brass
Resilient metal to metal in Monel or Inconel
  • Material and/or pressure test reports with cert. to EN 10204 / 3.1
  • Fire Safe acc. API 607 4th ed. and B.S. 6755 for both directions
  • CE-Certificate acc. to 2014/68/EU
  • Anti blow-out shaft API 609
  • Leakage testing to API 598 and/or DIN EN 12266-1
  • Fugitive emissions to TA-LUFT 1 & 2 / VDI 2440
  • BAM-Approval for Oxygen
  • Mounting bracket acc. to ISO 5211
Options &

Where you are looking for an isolation, on/off or control valve that provides zero leakage, and has a proven track record with companies like Air Liquide on oxygen service throughout the world.


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