Yarway 5600 Welbond Steam Globe Valve - Actuator Installation

This video demonstrates the procedure to automate the Yarway Welbond steam globe valve.

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Welbond valves can be fitted with electric motor actuators for remote or local automatic push button control. With this addition, valves installed in elevated piping runs, or where an emergency will require rapid, positive, and remote operation, can be quickly controlled. Motor actuated valves are available in the same sizes, materials and pressure classes as manually operated valves. They use standard repair parts, which are interchangeable with manually operated valves of the same size and pressure class.

Motor actuators include position switches, torque switches, and auxiliary switches for
audible or visual signals at the panel board. Dial indication of stem travel is also available.
Valve actuators are designed to provide constant seating thrust. This helps ensure drop-tight closure and automatic compensation for valve wear. A handwheel is provided for emergency operation in the event of power failure.

Pneumatic actuators, in both fail-open and fail-closed models, are also available for remote operation of Welbond valves. Manual handwheels, limit switches, solenoid valves and air filter regulators can be provided.


The Yarway Welbond® valve has become an established stop valve for general line service in modern high pressure power plants. The latest design of the valve combines the proven features of its predecessor with advantages made possible by advancements in metallurgy and fluid flow research. No other valve on the market offers this outstanding combination of features.
It offers industry a value-engineered product with minimum maintenance and maximum
service life resulting from its in-line repairability feature. The one-piece body eliminates all pressure welds, threads, and their related problems.
The extra thickness of the Stellite seat ring eliminates seat cracking and provides for repeated renewal of the seating surface with Yarway’s reseating tool.
The disc is a Stellite investment casting. The design provides a secondary orifice during opening and closing so that erosive forces are dissipated through the disc-body orifice rather than the disc-seat orifice, which must be protected for drop-tight sealing. The body design allows the disc-stem assembly to retract completely into the body, thus assuring smooth flow and a high Cv characteristic. The design of the disc reduces sealing torque for easy operation, both manually and with a powered actuator.