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Transporting food-grade liquids presents a different set of challenges than conventional liquid bulk hauling. The pump has to do more than move product from the tanker to its destination. It must support sanitary handling requirements, perform across a range of liquid characteristics and help operators keep unloading and maintenance efficient. 

For fleets transporting products such as dairy, corn syrup, vegetable oils, fruit juices, chocolate and starches, pump selection can have a direct impact on the unloading process and day-to-day operation of the tanker. 

The Gardner Denver STP125 Stainless Steel Pump Brochure provides an overview of a sanitary transport pump engineered specifically around these demands. 

Download the STP125 Brochure
STP125 Brochure Cover

The Brochure

Designed for food-grade liquid transport applications, the STP125 combines sanitary construction with features intended to simplify operation and maintenance on the road. 

In the brochure, you’ll find information on: 

  • Flow rates up to 232 GPM
  • Maximum operating speed of 750 RPM
  • Pressure capability up to 145 PSI
  • 3-A sanitary certification
  • Front-loading product seal replacement
  • Quick-strip pump construction
  • Multiple product seal configurations
  • Bi-directional pressure relief valves
  • Port and drive configuration options
  • Typical food-grade transport applications

Why Sanitary Pump Selection Matters in Liquid Bulk Transport

Not every liquid behaves the same way during loading, transport and unloading. 

A fleet hauling vegetable oil may face different pumping requirements than one unloading corn syrup, dairy products or chocolate. Product viscosity, unloading conditions, sanitation requirements and maintenance demands can all influence what a fleet needs from its pump. 

At the same time, maintenance teams need equipment that can be serviced without creating unnecessary downtime. 

That makes sanitary pump selection a balance between three priorities: product handling, unloading performance and serviceability. 

The STP125 was designed to bring those requirements together in a pump specifically suited to sanitary transport applications. 

Product Photo Stp 125 V1

Maintaining Product Integrity During Transfer

Moving a food-grade liquid is not simply a matter of achieving the highest possible flow. 

The characteristics of the transported product matter. 

The STP125 uses a rotor profile developed using computational fluid dynamics (CFD) to provide smooth product transfer. Its sanitary construction makes it suitable for applications where hygienic handling is a fundamental part of the transport process. 

The pump can be applied across a range of transported products, including: 

  • Corn syrup
  • Milk and dairy products
  • Vegetable oils
  • Fruit juices
  • Chocolate
  • Starches

For fleets hauling more than one type of product, having a pump designed around the requirements of sanitary liquid transfer can help create a more versatile tanker configuration. 

Key Technologies Covered

Sanitary Stainless-Steel Construction 

The STP125 is designed to meet strict sanitary requirements while maintaining durability for transport service. 

Key performance specifications include: 

  • Flow rate: Up to 280 GPM 
  • Maximum speed: 1000 RPM 
  • Maximum pressure: 145 PSI 
  • Weight: 147 lbs (including relief valve) 
  • Maximum temperature: Up to 212°F 

The stainless-steel construction provides corrosion resistance while maintaining the strength required for repeated transport duty cycles. 

 

Flexible Drive Options 

The STP125 supports two drive configurations to match tank truck installations: 

  • Hydraulic Drive 
  • Keyed Shaft Drive 

This flexibility allows operators and installers to configure the pump to fit various truck layouts and drive systems. 

 

Seal Options for Application Compatibility 

The pump’s flexible seal design allows operators to match seal materials to the product being transported. 

Available seal configurations include: 

  • O-Ring - NBR, FPM 
  • Lip Seal - NBR, FPM, PTFE 
  • Mechanical Seal - NBR, FPM, PTFE 

These options allow fleets to tailor the pump configuration to the viscosity, temperature, and chemical compatibility requirements of the application. 

 

Maintenance-Friendly Design 

The STP125 is designed to minimize downtime and simplify maintenance procedures. 

Service advantages include: 

  • Front-loading seal design allowing seal replacement without removing piping or pump head 
  • Quick Strip design for fast cleaning and maintenance 
  • Low shaft deflection for smoother, quieter operation 
  • Multiple drive configurations for easier installation flexibility 

These features allow operators to perform routine service quickly, keeping tank trucks in operation. 

 

Efficient and Low Operating Costs 

The pump design focuses on efficient fluid movement while protecting system components. 

Key efficiency features include: 

  • Bi-directional pressure relief valve protecting the system during loading and unloading 
  • CFD-optimized rotor profile for smooth product flow 
  • Quiet, pulse-free and cavitation-resistant operation 

This design helps reduce wear, protect product quality, and improve long-term reliability. 

Application Coverage

The STP125 is designed for sanitary and liquid bulk transfer applications including: 

  • Sugars 
  • Fruit juices 
  • Chocolate 
  • Vegetable oils 
  • Dairy products 
  • Starches 

Industries Served

  • Transportation & Logistics 
  • Food & Beverage 
  • Dairy Processing 
  • Chemical & Petrochemical 
  • Industrial Manufacturing 

Who Should Download This Brochure

  • Fleet managers operating food-grade tank trucks 
  • Maintenance managers responsible for sanitary pump systems 
  • Equipment specifiers selecting pumps for liquid bulk transport 
  • Operators seeking reliable, easy-service tank truck pumps 

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FAQs

The STP125 Pump provides a maximum flow rate of 280 gallons per minute, depending on operating speed and application conditions. 

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