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Manual Yoke Style Closures

Our Double Bolt Yoke style closure is compact in size and functional in design. A typical unit consists of a forged hub, a hinged blanking head, split-yoke clamps, operating bolts, and a self-energizing O-ring gasket. Materials of construction are in accord with ASME specifications, of course, and manufacture complies with applicable rules of the ASME code for Pressure Piping and with the ASME Boiler and Pressure Vessel Code.

Faster, Easier Operation

Operation is smooth and direct, and even the largest unit can be opened or closed in a matter of minutes. Turning of the actuating bolts - accomplished by one man using only standard hand tools - spreads the yoke halves until they are fully separated, allowing the head to be swung open on its hinge. There is no need to tug or hammer at bulky flanges or heavy metal doors or to struggle with bulky lugs and threads.

Contact surfaces of the clamping yokes, head and hub are tapered at less than the friction angle of dry carbon steel. When the head is closed and the yoke bolts are tightened, the head and hub are wedged together, compressing the O-ring and affecting a leak proof seal. After the pipeline or vessel has been pressurized, the end load on the closure head intensifies frictional resistance at the tapered surfaces, thereby developing an inherent holding action that tends to overcome the relatively small component of force seeking to separate the holding elements. This design pre-supposes non-lubricated contact surfaces.

ASME Code Stamped Closures

Code stamping of Tube Turns Hinged Closures is available on request at a nominal extra cost. This includes (1) the furnishing of a Partial Data Sheet verifying shop inspection of the unit by a commissioned inspector of the National Boiler and Pressure Vessel Inspectors, and (2) the affixing of the ASME stamp on the closure.

Manufacturer's Statement of Code Compliance

In the event that shop inspection and stamping in accordance with Section VIII of the ASME Boiler and Pressure Vessel Code is not required, Tube Turns can furnish a Manufacturer's Statement of Code Compliance. This document affirms that the Hinged Closure is manufactured in accordance with the applicable requirements of the code.

For more information, please contact us on the web or by phone

US, Canada
Audrey Dupree
502-774-6239
audrey.dupree@sypris.com

US, Mexico, Canada
Gwen Creamer
502-774-6218
gwen.creamer@sypris.com