Yoke Style Closures
Where frequent access is required
Manual Double-Bolt Yoke Style Closures
TUBE TURNS® Double Bolt Yoke style closure/manway 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, and manufacture complies with applicable rules of the applicable ASME code for Pressure Piping and with the ASME Boiler and Pressure Vessel Code.
Key Features & Benefits
Yoke Style closures engineered for reliability and ease of operation
Compact & Functional Design
Space-efficient design with forged hub and hinged blanking head
Self-Energizing O-Ring
Reliable sealing with self-energizing O-ring gasket system
Fast Operation
Opens/closes in minutes with standard hand tools
Split-Yoke Clamps
Dual actuating bolts spread yoke halves for easy access
ASME Code Compliance
Manufactured to ASME specifications with optional code stamping
Operating Aids Available
Chain & sprocket drives and other assistance options
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 operator 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 dangerous or heavy flanges or metal doors or to struggle with bulky lugs and threads.
Chain & Sprocket Closures
The Chain and Sprocket Drive option is by far the most economical opening assist device we offer for the TUBE TURNS® Double-Bolt Yoke-style Closure. This is a manually operated aid which assists in the opening and closing of the yoke.
These units not only make the process faster, they also prevent uneven movement of the yokes which may cause binding. On larger closures, ratio reduction is available to further reduce the force required to operate the unit.
Design Details
Engineered sealing system with tapered contact surfaces
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 effecting 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.
Technical Specifications
Available in a wide range of sizes and pressure ratings
Size Range
2" – 72" diameter
Pressure Range
ANSI 150 – ANSI 2500
Design Types
Double bolt and Single bolt configurations
Orientation
Horizontal and Vertical applications
ASME Code Stamped Closures
Code stamping of TUBE TURNS® Hinged Closures is available on request at a nominal extra cost. This includes:
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.
Alternative to full ASME code stamping when not required
Applications
Ideal for applications where frequent access is required
Pressure Vessels Requiring Frequent Access
Filter Vessels
Strainer Vessels
Pig Launchers and Receivers
Inspection Ports
Process Equipment Access Points
Pipeline Maintenance Applications
Storage Tank Access
Materials Available
Standards & Compliance
Product Gallery
Yoke Style closures in various configurations and applications
Literature & Documentation
Technical documentation available in multiple languages
Automated Yoke Style Closure (EN)
PDF • English
Yoke Style Closure Double Single Bolt Brochure (EN)
PDF • English
Yoke Style Closure IOM TT720 (EN)
PDF • English
Yoke Style Closure IOM TT1328 (ES)
PDF • Spanish
Yoke Overlay Mating Surfaces (EN)
PDF • English
Yoke Overlay Sealing Surfaces (EN)
PDF • English
Yoke Overlay Wetted Surfaces (EN)
PDF • English
Yoke Style Closure IOM (AR)
PDF • Arabic
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