M3 ANSI B73.1 Chemical Process Pump
Reverse-vane ANSI process pump platform organized around Group I, Group II and Group III. This page focuses on the M3 product itself: hydraulic range, group sizes, seal chambers, construction and dimensional data.
M3 hydraulic coverage
Use the M3 performance coverage charts to screen the applicable hydraulic range before reviewing detailed pump selection data.
Main Range
Extended RangeStart with duty and group
- Required flow
- Total dynamic head
- Operating speed / frequency
- Known Group I / II / III if available
- Process fluid, temperature and material
Browse M3 by group
Browse the M3 family by Group I, Group II and Group III to identify the applicable pump-size range.
Group I Sizes
Group II Sizes
Group III Sizes
M3 product architecture
Review the M3 cutaway and exploded view to understand the reverse-vane construction, seal chamber options, bearing arrangement and shaft system.
M3 construction
Installation reference by group
Review Group I, Group II and Group III dimensional references for installation planning. Final dimensions should be confirmed against the selected pump size and configuration.
Product resources
Access the key M3 engineering resources needed for hydraulic selection, dimensional review and construction evaluation.
Replacing an installed Durco Mark III?
Use the dedicated Durco Mark III Replacement page for installed-pump cross-reference, group verification, interchangeability and replacement scope.
Need help selecting an M3?
Start with the operating data you have. Send flow, head, process fluid, temperature, preferred material, and any known pump group or size.
Include your name, company and available project information so files can be matched to the inquiry.