Erosion resistant plug and seat valve

US11280422B1 · kind B1 · utility

Assignee

• Flowserve Management Company · US

Inventors

• Christopher Brydon · Reno, US
• Patrick Ammon Hord · Highland, US
• Robert B. Carlson · Bloomington, US
• Bradford Haines · Spanish Fork, US
• George C. Robertson · Ponte Vedra, US
• Zachary Samuel Driskell · Spanish Fork, US

Key dates

• Filing date: Dec 14, 2020
• Grant date: Mar 22, 2022
• Expiry date: Dec 14, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K1/48
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A plug-and-seat valve plug head assembly that resists abrasive erosion includes a hardened plug head, such as a ceramic plug head, attached to a plug stem without any soldering, welding, or braising attachment to the plug head. A diameter of a second portion of the plug head smoothly increases according to a plug diameter profile. A diameter of a first portion of the plug head is everywhere smaller than the plug diameter profile, and is maximal at a location spaced apart from the second portion. A plug head retainer overlaps and closely conforms to the first portion, while presenting an exterior surface that smoothly continues and extends the plug diameter profile. In embodiments, a plug head retainer blank attaches to the plug head retainer, capturing the plug head therebetween. Embodiments apply radial and/or axial stress to the plug head.