Zwick – Tri-Con Triple Offset Valves (TOV)Enquire Now

ZWICK TRI-CONTri-Con (TOV) Bare Shaft
ZWICK TRI-CONTri-Con (TOV) On/Off & Control
ZWICK TRI-CONTri-Con (TOV) Manual Operation
ZWICK TRI-CONTri-Con (TOV) DN2000 -78"

BRAND: ZwickCATEGORY: Control Valves, Triple Offset Valves,

The Zwick Tri-Con triple offset valve is a metal seated valve with the widest laminated seal ring in the market today. Also known as triple eccentric valves or triple offset butterfly valves (TOV), the unique design and special features guarantee 100% zero-leakage performance even during extreme temperature variation and pressure peaks.

This 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. They are ideal for oxygen service and are available with steam jackets for molten sulphur or applications where media temperature must be kept with specific temperature parameters.

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 - Triple Offset Valves

Triple Offset / Triple Eccentric Rotary Valve

  • SIL3 Certified
  • ZERO leakage bi-directional shut-off
  • Resilient metal to metal seats
  • 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

DN 50 – 2200 / 2” – 88”


PN 10 – 160 / ANSI 150 – 1500

Temperatures-215°C to +815°C
Double flanged / Lug / Wafer / Buttweld / Gate valve face to face

Carbon steel / Stainless Steel / Alloy steels / Special alloys

Carbon steel / Stainless Steel / Alloy steels
Resilient metal to metal
  • 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 Sasol, Sapref, Engen, Eskom, Sappi, Mondi and many others for applications like,


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