WTD F-series(EMSCO) drilling mud pumps have WTD F-500, WTD F-1000, WTD F-1300 three models.

WTD 3NB-Series drilling mud pumps have WTD 3NB 500, 3NB 1000,3NB 1300 and 3NB 1600 four models.

WTD 3NB series and WTD F-series drilling mud pumps' quality is equivalent to API Standard.