JME 4100: Manual TXV Preset

Authors

• Mary J. Adkins, Washington University in St. LouisFollow
• Jack Bene, Washington University in St. LouisFollow
• Mark Hass, Washington University in St. LouisFollow
• Michael Wright, Washington University in St. LouisFollow

Language

English (en)

Publication Date

Summer 2026

Document Type

Final Report

Problem Statement

This project aims to develop a simple method for adjusting the preset of a thermostatic expansion valve (TXV) while it remains installed in a refrigeration system. By testing TXVs and establishing a correlation between adjustment stem turns and nitrogen opening pressure (psig), a technician can estimate the valve setting without removing it for separate testing. The final deliverable will be a repeatable procedure, calibration chart, or tool that allows for faster and more practical TXV adjustments in the field.

Author's School

McKelvey School of Engineering

Author's Department

Mechanical Engineering and Materials Science

Class Name

Mechanical Engineering Design Project (UMSL JME 410)

Comments

Item record only. Report will not be available for download.

Recommended Citation

Adkins, Mary J.; Bene, Jack; Hass, Mark; and Wright, Michael, "JME 4100: Manual TXV Preset" (2026). Washington University / UMSL Mechanical Engineering Design Project JME 4110. 77.
https://openscholarship.wustl.edu/jme410/77