Electric Hydraulic Bolt Tensioning Pumps
Stratus
Designed for punishing conditions and demanding requirements across multiple heavy industries, the Stratus Electric Hydraulic Tensioner Pump is the leading American-made solution for precision bolt tensioning. Industrial operations present unique challenges—extreme temperatures, rough handling, low voltage environments, pervasive dust and dirt, and high duty cycles. The Stratus is engineered specifically to overcome these obstacles and keep your critical infrastructure running smoothly.
Stratus Electric Hydraulic Tensioner Pump: The Leading American-Made Solution
Versatile Applications Across Heavy Industries
The Stratus Electric Hydraulic Tensioner Pump provides reliable, high-pressure performance for a wide range of demanding applications, including:
- Wind Turbines: Ensuring structural integrity in remote, harsh environments like West Texas wind farms.
- Gas Turbines: Delivering precise tensioning for critical power generation components.
- Nuclear Turbines: Meeting the stringent safety and reliability standards of the nuclear power sector.
- Mining: Withstanding the rugged, dust-filled conditions of heavy extraction operations.
- Heat Exchangers: Providing accurate and consistent bolt loads for critical pressure vessels and piping systems.
The Stratus Electric Hydraulic Tensioner Pump is built around four foundational principles to ensure optimal performance in the most demanding industrial environments.
Uncompromising Safety
Safety is paramount in heavy industrial maintenance. The Stratus features a low-voltage hand pendant control circuit, protecting operators from electrical hazards. Additionally, an easily accessible Emergency Stop button is integrated directly onto the pendant for immediate shutdown capabilities.
Proven Reliability
Equipped with a robust industrial electric motor, the Stratus effortlessly handles the heat and low-voltage challenges typically found in remote or demanding locations. Every unit undergoes rigorous cycle testing to verify long-term performance and reliability. Furthermore, advanced filtration systems are incorporated to protect the internal hydraulics from dust and debris, ensuring consistent operation.
Rugged Durability
Built to withstand rough handling in mining, power generation, and other heavy industries, the Stratus comes standard with a heavy-duty protective frame. The hydraulic circuit is meticulously designed to minimize heat generation, significantly extending the system's operational life and reducing maintenance downtime.
Enhanced Usability and Speed
Despite its power, the Stratus maintains a compact size and low weight, making it easy to transport and maneuver on-site. The operator controls are intuitively designed to deliver higher efficiency during complex bolting operations. When it comes to speed, the Stratus excels—more horsepower translates directly to more flow at working pressure, allowing you to complete tensioning tasks faster and more effectively.
ETP
ETP Electric Tensioner Pump: A Heritage of American-Made Excellence
For years, the ETP Electric Tensioner Pump set the industry standard for rugged, reliable bolt tensioning. Proudly made in the USA, the ETP earned its reputation on the front lines of heavy industry, delivering uncompromising performance in the most demanding environments. From remote wind farms to critical power generation facilities, the ETP was the trusted workhorse for professionals who demanded precision and durability.
The Legacy of the ETP Electric Tensioner Pump
The ETP Electric Tensioner Pump was engineered with a singular focus: to provide relentless reliability under punishing conditions. Its legacy is built upon a foundation of core strengths that made it an indispensable tool across multiple sectors.
Rugged American Craftsmanship
Manufactured in the United States, the ETP was synonymous with heavy-duty construction. It was built to withstand the physical abuse of industrial job sites, featuring robust components that resisted wear and tear. This rugged design ensured that the pump could endure extreme temperatures, pervasive dust, and rough handling without compromising its performance.
Unwavering Reliability
When critical infrastructure required precise bolt tensioning, operators turned to the ETP. Its dependable electric motor and high-pressure hydraulic system delivered consistent, accurate results, cycle after cycle. The ETP's reliability minimized downtime and ensured that maintenance operations were completed safely and efficiently.
A Foundation for the Future
The ETP Electric Tensioner Pump established a heritage of excellence that continues to influence the industry today. The lessons learned and the engineering breakthroughs achieved during its production laid the groundwork for the next generation of tensioning technology.
The Next Evolution: Introducing the Stratus
While the ETP Electric Tensioner Pump has been officially retired, its legacy of American-made ruggedness and reliability lives on in its successor: the Stratus Electric Hydraulic Tensioner Pump.
Electric Tensioner Pump Frequently Asked Questions
What is an electric hydraulic tensioner pump?
An electric hydraulic tensioner pump is a single acting, small hydraulic power unit with an electric motor driven hydraulic pump, typically designed for pressures up to 1500 bar (21,750 psi). This differs from a 10,000 psi pump used to operate a hydraulic torque wrench with its different operating pressure, hydraulic circuit, and controls. Typically one would find a single hydraulic hose connected from a pump to a tensioning tool, but a twin line, or two hydraulic hoses, connected to a hydraulic torque wrench from its pump.
How does an electric hydraulic bolt tensioning pump work?
An electric hydraulic bolt tensioning pump uses an electric motor to generate high-pressure hydraulic fluid, which is delivered to a tensioner tool. The tensioner physically stretches the stud bolt to a precise elongation, allowing the nut to be turned down without friction before the pressure is released to create a secure, accurate clamping force.
What are the advantages of using an electric tensioning pump over a torque wrench?
Electric tensioning pumps offer significantly higher accuracy (typically ±10% compared to ±30% for torquing) because they eliminate the friction variables between the threads and the nut face. They also allow for simultaneous tensioning of multiple bolts, which speeds up the process and ensures a more uniform load across critical joints like flanges.
What is the max operating pressure of the Stratus electric tensioner pump?
The standard version of the Stratus is rated for 21,750 psi (1500 bar). Variants of the Stratus are available with ratings of 29,000 psi (2000 bar) and up to 36,250 psi (2500 bar). Since the pressure required varies with tensioner size and application, the Stratus output pressure can be set to lower pressure. Many applications require only in the range of 14,000 or 17,000 psi.
 How do I order the Stratus electric tensioner pump?
Contact us for the name of an Authorized Distributor near you.
Which voltages are available for the Stratus electric tensioner pump?
Single phase voltages offered are 120 Volt AC or 240Volt AC. For three phase voltages, the Stratus is available in either 240 Volt AC or 480 Volt AC. Both 60 Hz and 50 Hz versions are available.
Do electric tensioning pumps require special maintenance or calibration?
Yes, regular maintenance is crucial for optimal performance and safety. The most common maintenance requirements are replacing filters, changing the oil, wiping down the inside of the reservoir, and replacing gaskets. Additionally, the pump's pressure gauges must be calibrated annually to ensure the tensioning force remains accurate.
What industries commonly use electric hydraulic tensioning pumps?
These pumps are essential for heavy-duty, critical bolting applications where precision and high pressure are required. They are widely used in the oil and gas industry for pipelines and refineries, in the wind energy sector for turbine assembly, and in power generation and heavy manufacturing.
What operating pressures can electric tensioning pumps achieve?
Electric hydraulic tensioning pumps are designed to deliver ultra-high pressures required for stretching large industrial bolts. Depending on the specific model and application, these pumps typically operate at pressures ranging from 10,000 psi (690 bar) up to 21,750 psi (1500 bar) or more.
 We require more oil to operate multiple tensioners at the same time. One gallon is not sufficient for our application. Is the Stratus electric tensioner pump with a larger reservoir?
While the standard Stratus reservoir is designed for a nominal one gallon of oil, we build versions with larger reservoirs to accommodate specialized bolting applications. Let us know what you need to meet your requirements.