Zwick – Tri-Check Large Bore Check ValvesEnquire Now

Zwick 8211 TriCheck Large Bore Check Valves

BRAND: ZwickCATEGORY: Gate, Globe & Check Valves, Triple Offset Valves,

The Zwick Tri-Check large bore check valve combines all the benefits of the Tri-Con triple offset valve in a non-return valve. It provides a triple offset design with a wide seat angle and a true cone in cone, no rubbing while moving and absolute zero leakage performance.

Also the statically held gasket and the no pinned disc design are used in the Series Tri-Check. The Tri-Check is equipped with a hydraulic damper and a counter weight. The damper can be adjusted to the actual installation conditions in which the valve will be used. The damping system not only reduces the risk of pressure surges due to waterhammer because of its closing characteristic, but also prevents the disc from slamming into the seat. Instead, the disc closes with a smooth movement which can be adjusted, so that the valve closes slowly in the last degrees of movement to protect the sealing parts.

The Tri-Check valve has been proven to be the ideal non-return valve for single or multiple pump protection applications for the last two decades. Another benefit of the valve is the variety of features. Beside the non-return function the valve can be used as a combined check and isolating valve or as a check valve with power assisted closing and opening.

The Tri-Check uses a seat design in which the seat is not parallel to the flange facing in the body. Instead there is a certain angle between centerline and seat in the body as can be seen in the left drawing. As a consequence the general free area will be increased, so that the fluidic resistance of the valve will be decreased. Another advantage is that the valve travel will be reduced, so that the valve reaches its ideal position in the flow much faster. Zwick also uses the latest EFD Simulation technology to optimize the design of the series Tri-Check and to achieve the best possible hydrodynamical characteristics.

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.

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



Check Valve (Non return)

  • Triple eccentric design
  • Zero leakage
  • Non rubbing seat
  • Metal to metal seats
  • Hydraulic damper and counter weight

80mm to 900mm / 3” to 36”


ANSI 150 – 300

Temperatures-196°C to +815°C
Double flanged

Carbon steel / Stainless Steel / Alloy steels / Special alloys

Resilient metal to metal
Options &

Position indicators


Where you are looking for a non-return valve for liquids and gases that is light and reliable, while also providing zero leakage.


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