The primary purpose of a blow-off valve is removal of dirt, sediment and scale. Yarway blow-off valves are available in two broad
categories - those that operate on a sliding principle and those that operate on a seat-and-disc principle. Yarway's Blow-off
Valves conform to ASME Power Boiler Code, Section 1.
The Hy-Drop Throttling Valve is designed for continuous blowdown, but also works well for sampling, high pressure vents, boiler
feed pump bypass relief, high pressure drop services associated with erosive and wiredrawing characteristics-or where velocity
is sufficient to destroy valves of conventional globe or even venturi designs.
The Yarway Welbond Valve has become an established stop valve for general line service in modern high pressure power plants. The
latest design combines the proven features of its predecessor with advantages made possible by advancements in metallurgy and fluid
flow research.
