ChampionX (CHX) 8-K Apergy and ChampionX Complete Merger to Create the New ChampionX

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on FormS-8 (No.333-224926,No. 333-238903 andNo. 333-238904) of ChampionX Corporation (f/k/a/ Apergy Corporation) of our report dated April 1, 2020, relating to the financial statements of ChampionX Holding Inc., which is incorporated by reference in this Form 8-K.

/s/ PricewaterhouseCoopers LLP

Minneapolis, Minnesota

June 3, 2020