Valtek Mark One - Flowserve

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less- steel yoke clamps, although on large valves the actuator is bolted directly to the bonnet. Each clamp has an inclined plane surface which, when bolted together, securely fastens the actuator yoke to the bonnet. Unlike conventional threaded clamps, the Valtek Mark One-Powers’ clamp design permits easy removal even under

  Steel, Bolted, Bonnet, Flowserve