4127C Series: Engineered for Demanding Soap & Surfactant Applications
When it comes to transferring thin, non-lubricating liquids like surfactants and detergent slurries, the Viking Pump 4127C Series™ stands out as a reliable and efficient solution. Built with precision and durability in mind, this series is specifically designed to handle the challenges posed by low-viscosity fluids that lack lubricity—common in cleaning product manufacturing.
A key feature of the 4127C Series™ is its use of non-galling stainless steel for idler gears. This advanced material allows the pump to operate smoothly against 316 stainless steel components without the risk of galling, even under demanding conditions. The result is longer service life, reduced maintenance, and consistent performance in applications where traditional stainless steel components may fail.
Whether you're metering surfactants into a blend tank, transferring soap from a day tank, or handling detergent slurry in a crutcher system, the 4127C Series™ delivers the flow control, chemical compatibility, and mechanical resilience needed to keep your process running efficiently.
4127C SERIES™
CAPACITY | VISCOSITY | PRESSURE | TEMPERATURE |
to 320 GPM to 73 m³/h |
28 to 2,000,000 SSU 0.1 to 440,000 cSt |
to 150 PSI to 10 BAR |
-120°F to +500°F -85°C to +260°C |

4124A Series: Durable and Cost-Effective for Soap Manufacturing
For many soap processing applications, especially those involving lubricating or moderately viscous fluids, the Viking Pump 4124A Series™ offers a rugged and economical solution. Constructed from cast iron, this series is ideal for handling raw materials like plant oils, animal fats, and saponified mixtures where corrosion resistance is less critical and mechanical durability is paramount.
Cast iron pumps like the 4124A Series™ are particularly well-suited for:
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Bulk transfer of triglycerides from storage tanks
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Saponification and neutralization processes where soap and glycerine are produced
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Blending operations involving lubricating greases or thickeners
The 4124A Series™ combines Viking’s proven internal gear design with robust cast iron construction, delivering reliable performance in environments where stainless steel may be unnecessary or cost-prohibitive. For operations seeking a balance of durability, affordability, and consistent flow control, the 4124A Series™ is a smart choice.
4124A SERIES™
CAPACITY | VISCOSITY | PRESSURE | TEMPERATURE |
to 500 GPM to 114 m³/h |
28 to 2,000,000 SSU 1 to 440,000 cSt |
to 200 PSI to 14 Bar |
-60 to +450 °F -50 to +230 °C |

O-Pro® Guard Seal: Enhanced Sealing for Soap & Surfactant Processing
In applications involving soaps, surfactants, and detergent slurries, effective shaft sealing is critical to maintaining process integrity and minimizing maintenance. Viking Pump’s O-Pro® Guard Seal offers a robust, cost-effective solution designed specifically for challenging fluids—especially those that are thin, non-lubricating, or prone to leakage.
The O-Pro® Guard Seal uses a series of O-rings to create a barrier that protects against product leakage and shaft wear. This design is particularly beneficial in soap and detergent slurry applications, where traditional packing or mechanical seals may struggle with chemical compatibility or fluid viscosity.
Key Advantages:
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Leak Prevention: Provides reliable sealing for low-viscosity and non-lubricating fluids.
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Reduced Maintenance: Minimizes wear on the shaft and internal components, extending pump life.
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Simplified Installation: Easier to install and maintain compared to complex mechanical seals.
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Cost Efficiency: Offers a durable sealing solution without the higher cost of cartridge seals.
For manufacturers seeking dependable sealing performance in soap and surfactant processing, the O-Pro® Guard Seal is a smart upgrade that enhances pump reliability and reduces downtime.
1127C SERIES™ WITH O-PRO® GUARD SEAL
CAPACITY | VISCOSITY | PRESSURE | TEMPERATURE |
to 320 GPM to 73 m³/h |
28 to 2,000,000 SSU 0.1 to 440,000 cSt |
to 150 PSI to 10 BAR |
0 to +350°F -15°C to +175°C |

With over 110 years of experience providing positive displacement pumping solutions, Viking Pump has a rich, lengthy history of providing engineered solutions for tough applications. We have dedicated sales and field support specialists who are supported by a team of customer service representatives and engineers. Our knowledgeable team of application engineers available to help with product selection and technical support. USA based company with vertically integrated manufacturing facility.
ALL PUMPS FACTORY TESTED
Our state-of-the-art testing equipment is used to confirm performance prior to shipments. Our world-class lab gives Viking Pump the ability to test our pump designs across a range of relevant variables.
TEST LAB
Our world-class lab gives Viking the ability to test its glycol pump designs across a range of relevant variables.
VERTICALLY INTEGRATED PRODUCTION PROCESS
Viking Pump operates a foundry, a 200,000+ sq. ft. machining, assembly and testing center, and an extensive product engineering and testing lab in its world headquarters in Cedar Falls, Iowa, USA. This level of vertical integration ensures maximum quality, ability to satisfy special needs, and to meet project schedules.
Need help choosing the right pump or sealing solution?
Viking Pump’s team of experts is here to support you.
Whether you have technical questions, need a quote, or want guidance on your specific application, we’re ready to help you find the best solution. Fill out our contact form and let us know how we can assist—your process performance starts with the right partner.