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Pump Coupling Tensioners

Hydraulic Pump Coupling Tensioners

Hydraulic tensioning is the ideal method for tightening bolted connections. Hydraulic tensioning eliminates inaccuracies and helps achieve correct bolt loading in critical connections. At HTI, we’ve been building hydraulic tensioners and nuts since 1986.

What are Pump Coupling Tensioners?

Traditionally, installing and removing coupling flanges on tapered shafts has been accomplished by heating the flange or by using a jury-rigged assortment of mechanical jacks. These methods are time-consuming and can be a safety hazard.

To avoid these methods, HTI has developed our very own Pump Coupling Tensioners, which allow you and your team to install and remove coupling flanges in a fast, accurate, safe, and cost-effective way.

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Benefits of Pump Coupling Tensioners:

Fast

The Pump Coupling Tensioner reduces a 12–hour chore to a 20–minute task. There is no need to wait for the coupling to heat up or cool down.

Accurate

Hydraulic coupling hydraulic tensioners have the power to accurately advance the coupling to its proper position on the shaft. There is no time–consuming rework associated with a mispositioned pump coupling tensioner.

Safe

The coupling hydraulic tensioner is designed to fit the specific coupling. Controlled hydraulic pressure pulls the shaft and coupler together or pushed them apart. No heating is required. Safety was a top-priority we considered when designing our Pump Coupling Tensioners, so you can rest easy knowing HTI has your back.

Cost Effective

The pump coupling tensioner is reversible, so it performs both the assembly and the disassembly tasks. For most designs, the hydraulic pressure is provided by a standard (10,000 psi) hand pump and hose. Higher operating pressures, up to 33,000 psi, are available.

Pump coupling tensioner with backing plate

Pump coupling tensioner with backing plate

Pump Coupling Tensioner Applications:

HTI's coupling hydraulic tensioners can be used for a number of applications. Below are a few common applications of using HTI's pump coupling tensioner.

  • Condensate Booster Pump (CBP)
  • Reactor Coolant Pump (RPC)
  • Reactor Feed Pump (RFP)
  • Reactor Recirculation Pump (RRP)
  • Feedwater Pump
  • Heater Drain Pump
  • Steam Generator Feed Pump (Both Main & Auxiliary Pumps)
  • Any Primary or Secondary Pump with a Tapered Shaft
  • Any Piece of Rotating Equipment with a Tapered Shaft

Thread the Pump Coupling Tensioner onto the tapered shaft. Connect the hose assembly and the hand pump, then increase the pressure to push the coupler flange to the desired location on the shaft.

Thread the opposite end of the Pump Coupling Tensioner onto the tapered shaft. Install the Backup Plate for the Tensioner to push against. Attach the hose assembly and the hand pump, then increase the pressure to push the flange off of the tapered shaft.

  • Allis-Chalmers
  • Bingham Willamette
  • Byron Jackson
  • CE–KSB
  • DeLaval
  • Gould
  • Ingersol Rand
  • Johnston
  • Pacific
  • Sulzer
  • Sulzer Bingham
  • Westinghouse
  • Worthington

We also offer hydraulic pumps to help transfer liquids into hydraulic systems.

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Custom Engineered Tensioners Since 1986

HTI has been designing engineered solutions to your toughest bolt tensioning problems since 1986! You can choose from one of our standard catalog sizes above, or we can design a custom fixed tensioner for any application when a standard model won’t work. HTI tensioners can be designed for imperial or metric-sized studs, high loads, high temperatures, large stud sizes, or corrosive environments. Our multi-unit tensioning systems can make easy work of large bolted systems, and our automated tensioning systems can reduce labor and increase throughput in high-volume manufacturing applications. 

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If you have questions, comments, would like more information about our products, or want to get started designing your custom tensioning solution, please contact us and we will respond promptly.