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Viking Pump has reimagined its heavy-duty alloy pumps, both steel and stainless steel, with a series of innovative design changes. These new models are engineered to reduce costs and lead times by significantly simplifying manufacturing through fewer casings and brackets. At the same time, they offer greater flexibility in porting and shaft sealing options, along with numerous enhanced standard features.
The new modular pumps are designed to be interchangeable with Viking's existing steel 123A, 4123A, 223A, and 4223A series, as well as the stainless steel 127A, 4127A, 227A, and 4227A series, and the 724 and 4724 series that they will largely replace. The new models follow a similar naming convention but end in "C" instead of "A." You can view the full range of Viking Heavy Duty pumps below (Fig. 1), with the new modular pumps highlighted in green.
| Material | Jacketing | Series - Seal Type | F | FH | G | H | HL | K | KK | L | LL | LS | Q | QS | N | R | RS |
|----------|-----------|---------------------------|---|----|---|---|----|---|----|---|----|----|---|----|---|---|----|
| Steel | Non-Jacketed | 123C - Packed | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | | 4123C - Mech. Seal | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | Jacketed | 223C - Packed | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | | 4223C - Mech. Seal | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | | 323A - Packed | | | | | | | | | | | ✔ | ✔ | ✔ | ✔ | |
| | | 4323A - Mech. Seal | | | | | | | | | | | ✔ | ✔ | ✔ | ✔ | |
| | Max. Flow | GPM | | | | 15 | 30 | 75 | 100 | 135 | 140 | 200 | 300 | 600 | 1100 | 1600 |
| | | m³/h | | | | 3.4 | 6.8 | 17 | 23 | 31 | 32 | 45 | 68 | 136 | 250 | 363 |
| | Max. Speed | RPM | | | | 1750 | 1750 | 780 | 780 | 640 | 520 | 640 | 520 | 520 | 350 | 280 | 280 |
| Stainless Steel | Non-Jacketed | 127C - Packed | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | | 4127C - Mech. Seal | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | | 1127C - O-Pro® Seal*| | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | |
| | Jacketed | 227C - Packed | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | | |
| | | 4227C - Mech. Seal | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | | |
| | | 1227C - O-Pro® Seal | | | | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | | | | |
| | | 327A - Packed | | | | | | | | | | | ✔ | ✔ | ✔ | ✔ | |
| | | 4327A - Mech. Seal | | | | | | | | | | | ✔ | ✔ | ✔ | ✔ | |
| | | 724 - Packed | ✔ | ✔ | ✔ | | | | | | | | | | | | |
| | | 4724 - Mech. Seal | ✔ | ✔ | ✔ | | | | | | | | | | | | |
| | Max. Flow | GPM | 1.5 | 3 | 5 | 10 | 20 | 50 | 65 | 90 | 110 | 160 | 200 | 600 | 1100 | 1600 |
| | | m³/h | 0.3 | 0.7 | 1 | 2.3 | 4.5 | 11 | 15 | 20 | 25 | 36 | 45 | 73 | 136 | 250 | 363 |
| | Max. Speed | RPM | 1750 | 1750 | 1150 | 1150 | 1150 | 520 | 520 | 420 | 420 | 520 | 350 | 350 | 350 | 280 | 280 |
*Speeds with some O-Pro® seal models are derated vs. packed or mechanical seal models. Max O-Pro® speed on H & HL are 760 RPM, N is 280 RPM and R & RS are 225 RPM.
Fig. 1 – Viking Heavy Duty models with new Modular pumps shown in Green.
Why would Viking Pump change its highly successful range of alloy pumps? The existing series are workhorse internal gear pumps used across the chemical, general industrial and food processing industries.
But with literally tens of thousands of possible configurations, it was difficult for Viking distributors to predict and inventory exactly what their customers would need. So if a pump user wanted a particular configuration, they either had to wait for a bespoke pump or were forced to accept tradeoffs—pumps with whatever feature set was available in stock at the local distributor.
That meant that most alloy pumps were built to order, and building unique one-off pumps is inefficient, even for a vertically-integrated manufacturer like Viking Pump with its own foundries. Lead times were usually longer than customers wanted and were even more pronounced for European and Asian customers due to ocean shipping, which was unacceptable.
So through modular design, Viking Pump distributors can now inventory key components and build up whatever configurations their customers need, greatly reducing lead times while simultaneously reducing prices and adding new features.
Stainless steel pumps are primarily used for:
- Corrosive chemicals (e.g., acids and bases).
- Processes where the pumps will be flushed with water or steam (e.g., sugar processing).
- Low-hazard food processing (e.g., edible oils).
- Very low temperature processes to -120°F / -85°C (e.g., silicone oil in freeze dryers).
- For use outdoors in very cold climates.
Steel models are generally used for:
- Flammable or hazardous liquids (e.g., fuels, petroleum, and petrochemicals) where thermal cracking of iron would be a concern in the event of a fire-fighting water deluge.
- Very high temperatures up to 800°F / 430°C (e.g., heat transfer fluids, pitch, polystyrene) where iron or stainless steel is not suitable.
You can find details regarding the new modular pump designs in future blogs covering their key components: the new ProPortâ„¢ casings and the new U-Plusâ„¢ brackets.