When it comes to industrial pumps flow control, picking between two ANSI end-suction centrifugal process pumps usually means weighing new-condition surplus against a lower-cost used unit. Here, a Flowserve Durco MK3 with a 3x2 casing and a Goulds 3196 STi with a 1x1.5-8 size sit at opposite ends of that scale. The price gap is significant, but the pump sizes, condition, and included details are different enough that there is no universal winner.
Quick Verdict
Choose the Flowserve Durco MK3 when a surplus pump's new-condition status matters more than the higher price. Choose the Goulds 3196 STi when the lower price and a used ANSI end-suction pump are acceptable for your operation.
At a Glance
| Consideration | Flowserve Durco MK3 | Goulds 3196 STi |
|---|---|---|
| Listed price | USD 2,750.00 | USD 1,625.00 |
| Condition | New - Open box | Used |
| Casing / size | 3" x 2" | 1x1.5-8 |
| Casing material | DCI | Ductile iron |
| Pressure rating | 250 PSI @ 100°F | 250 PSI |
Where the Flowserve MK3 Wins
The Flowserve is the surplus pick. Manufactured in 2018, it includes an IPS Beacon 2. It weighs 315 lb, so plan rigging accordingly. The DCI material and 250 PSI @ 100°F rating point to a chemical process role.
Where the Goulds 3196 STi Wins
The Goulds is the lower-priced option and the one with a specified electric power source. It comes from Goulds Pumps USA and uses a 6.750-inch impeller with a 3500 RPM rating. The 1x1.5-8 ANSI end-suction configuration is useful for flow control setups where a smaller pump footprint makes sense.
Product Notes
3" x 2" Durco Flowserve MK3 STD Chemical Process DCI Centrifugal Pump NEW Z1
The Flowserve is the go-to when you want an unused surplus pump for a chemical process application. It has a 2018 date of manufacture and includes an IPS Beacon 2. The 315-lb weight means this is not a light, compact unit. The limitation is the no-test nature of the sale: only what is shown in the pictures is included, and there is no way to test the pump before purchase. If you can accept that level of uncertainty in exchange for surplus inventory, this is the one to pursue.
Goulds 3196 STi 1x1.5-8 ANSI End-Suction Centrifugal Process Pump 6.750
The Goulds is the practical choice when an ANSI end-suction pump at USD 1,625 fits the application. It is from Goulds Pumps USA and is suited to chemical, pulp and paper, and industrial fluid handling work. The 6.750-inch impeller and 3500 RPM rating define a specific operating envelope, and the electric power source is already specified. The unknown is previous service life. The year is shown in the photos, so a close look at the images is part of the buying decision. The price is the attraction.
Final Choice by Use Case
Go with the Flowserve Durco MK3 if surplus inventory is the priority and you can plan around a no-test, sight-unseen purchase. Go with the Goulds 3196 STi if the lower price route fits your flow control budget. For projects where fresh surplus iron is worth the premium, the Flowserve is the one; for tighter budgets, the Goulds is the sensible first stop.
