Zwick – Tri-Con Triple Offset Oxygen Valves

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About Zwick – Tri-Con Triple Offset Oxygen 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!

Series	Tri-Con Oxygen Service
Design	Triple Offset / Triple Eccentric Rotary Valve
Features	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
Size Range	50mm to 900mm / 2” to 36”
Pressure Rating	PN16 – 250 / ANSI 150 – 900
Temperatures	-50°C to +250°C
End Connections	Double flanged
Body Materials	Monel / High Strength Copper Brass
Disc Materials	Monel / High Strength Copper Brass
Seat Materials	Resilient metal to metal in Monel or Inconel
Standards	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 & Accessories	Manual, pneumatic actuators or electric actuators Valve Positioners for control applications
Applications	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.