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Thelco Pump of the Day: Worthington 3CNG74 Alloy 20 Pump

by | Jan 28, 2026 | News | 0 comments

Worthington 3CNG74 Alloy 20 pump with full diameter 8.00 inch impeller built & assembled at Thelco

Thelco Pump of the Day: Worthington 3CNG74 Alloy 20 Pump

When corrosive applications demand durability, chemical resistance, and long-term reliability, the Worthington 3CNG74 Alloy 20 pump stands out as a proven solution. Built with full Alloy 20 construction and a full diameter 8.00 inch impeller, this pump delivers consistent hydraulic performance.

At Thelco, we specialize in  manufacturing,building, assembling and supporting Worthington pumps. Each unit is assembled with precision, inspected thoroughly, and backed by the largest in stock pump and parts inventories in the industry.

Designed for Corrosive and Demanding Applications

The Worthington 3CNG74 is purpose built for handling corrosive liquids in challenging environments. Alloy 20 construction provides excellent resistance to sulfuric acid, chlorides, and abrasive fluids making this pump ideal for:

  • Chemical processing plants

  • Acid transfer systems

  • Industrial wastewater treatment

  • Fertilizer production

  • Specialty chemical handling

Because corrosion resistance directly impacts pump life, selecting Alloy 20 construction helps reduce downtime, extend service intervals, and lower long-term maintenance costs.

Full Diameter 8.00” Impeller for Maximum Performance

This 3CNG74 features a full-diameter 8.00-inch impeller, allowing the pump to deliver maximum hydraulic efficiency across its operating range. A full diameter impeller ensures:

  • Higher head capability

  • Improved flow performance

  • Better efficiency

  • Stable operation across variable conditions

At Thelco, every impeller undergoes strict inspection and balancing procedures to ensure smooth operation, reduced vibration, and long bearing life.

Precision Assembly and Quality Control at Thelco

Every pump assembled at Thelco follows a controlled build process. Our technicians verify all tolerances, alignment, sealing surfaces, and clearances to ensure optimal performance and long term reliability.

Each pump receives:

  • Precision assembly

  • Shaft alignment verification

  • Mechanical seal installation and inspection

  • Final fit-up checks

  • Detailed visual inspection

This process ensures every unit leaving our facility is ready for dependable service.

Extensive Worthington Inventory and Support

In addition to complete pumps, Thelco maintains  the largest inventories of Worthington pumps and parts.

  • D500, D800, and D1000 series pumps

  • CNG pumps

  • LR and LLR horizontal split case pumps

  • Gear pumps

  • Shafts, casings, impellers, bearing frames, and seal components

Because of this depth of inventory, we help customers reduce lead times, minimize downtime, and keep critical operations running smoothly.

Why Choose Thelco for Worthington CNG Pumps

  • Large in-stock inventory

  • Fast turnaround times

  • Expert assembly and testing

  • Full support

  • Proven industry experience

When uptime matters and corrosion is a concern, Thelco delivers proven pump solutions that perform.

Contact Thelco

If your operation requires reliable Alloy 20 pumping solutions, our team is ready to help. Contact Thelco today to discuss your application requirements, performance targets, and delivery timelines.