Hydraulic Tensioning

Tensioning Tooling

Standard and customized tensioners designed to secure studs across a variety of applications including pipe flanges, turbine cases, and coupling hardware.

Hydraulic External Tensioner

A lightweight, compact and versatile bolt tensioner suited for applications where the bolted joint has a minimum of one stud diameter thread length exposed above the nut. Operates at a maximum pressure of 21,750 psi and utilizes high strength alloy steel components for long lasting performance.

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Flange Tensioner

The lightest weight and smallest overall diameter of bolt tensioners in its class. This design features an over stroke stop that prevents seal damage and leakage that also has a visual color coded indicator to identify maximum stroke.

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Hydraulic Rod Tensioning System

A tensioner designed to have a smaller foot print and higher preload capability than standard tensioning tools. Typically used on steam and nuclear turbines with limited stud accessibility and no exposed threads above the nut.

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Hydraulic Safety Interlock Guard Tensioner

Designed with safety and performance in mind, the Hydraulic Safety Interlock Guard is a modular tensioner that is engineered for single-user operation and provides full containment of all components during the tensioning process.

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Hydraulic Nut

Produces uniform compression of casings, flanges, bearing housings or connection rods and eliminates erratic bolt loads. Features a unique metal-to-metal seal design tolerant to harsh environments up to 500°F.

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Crosshead Nut

Provides all the features of our standard hydraulic nut, but optimized for extremely high dynamic forces that are typically seen in crosshead applications. Designed to prevent piston rod bending and fatigue failures.

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Hydraulic Tensioned Bolt

Integrates a hydraulic nut into the bolt head which eliminates inaccuracies caused by conventional bolt torquing methods. Compact standard sizes ideal for confined spaces or where envelope restrictions prevail.

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External Tensioned Nut

Paired with a bolt tensioner, the external tension nut provides a solution for standard applications in which there are no exposed threads above the existing nut. Enables easy transition from torqued to tensioned hardware.

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Studs, Nuts & Bolts

Tensioned Hardware

Hydraulically tensioned studs, bolts, and nuts precision machined and FEA designed for controlled, safe fastener loading. Available in standard or fully custom configurations.

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Casing Alignment Pin

A two-piece collet and tapered pin system designed to reduce assembly time while increasing safety when dealing with misaligned casing bolt holes.

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Radial Fit Bolt

Hydraulically fitted coupling bolts consisting of a tapered bolt with tapered sleeve and two cylindrical nuts — designed to replace standard coupling bolts and establish precise concentricity.

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Pump Kits & Accessories

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Air Driven Pump Kit

Efficient, compact and portable high-pressure system providing instant and reliable hydraulic power up to 40,000 psi.

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Manual Pump Kit

Single or dual pump configurations for low-volume tensioning and hub installation applications.

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High Pressure Flexible Hoses

Various lengths and pressure ratings with swivel fittings and six layers of wound steel pressure support.

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High Pressure Hydraulic Fittings

Stainless steel and heat-treated alloy steel fittings. Standard and custom configurations available.

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Don't see what you need? Riverhawk engineers custom tensioner solutions for any application.

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