Light Weight Self Contained Tensioner – Biach SCT

The Biach Light Weight Self Contained Tensioner (SCT) is used to tighten reactor pressure vessel head studs. The remarkable Light Weight SCT brings greater safety, reduces manpower, lowers dose and shortens the tensioning to a critical task. Quick Latch/Un-Latch design for fast reactor pressure vessel (RPV) performance based on over 50 years of field proven use with our quick disconnect tensioners.

RPV Self-Contained Tensioners

Light Weight Self-Contained Tensioners (SCT) – Biach RPV Tensioning Systems

VIEW PDF

Self-Contained Tensioner Accessories

RPV Custom Hoist, Tractor and Control Handles

VIEW PDF

RPV Self-Contained Tensioners

RPV Test Block Assemblies

VIEW PDF

SCT Remote Control Panel

Self-Contained Tensioner Remote Control Panel

VIEW PDF

Biach Light Weight Self-Contained Tensioner (SCT): Advanced Reactor Stud Tensioning

The Biach Light Weight Self-Contained Tensioner (SCT) is engineered to safely and efficiently tighten reactor pressure vessel (RPV) head studs, combining performance, precision, and reliability in one compact system.

Building on over five decades of field-proven experience, the Light Weight SCT enhances safety, reduces crew requirements, minimises operator radiation dose, and significantly shortens the time required for critical tensioning tasks.

Its Quick Latch/Un-Latch design ensures rapid engagement and release, making it one of the fastest and most efficient RPV tensioning systems available today.

Technical Specifications

Power Requirement: 460–480 VAC, 10 amps
Communication Protocol: High-speed industrial Ethernet (Cat 5 cable bundled with power line)
Pressurisation Time: Less than 20–30 seconds per stud
Accuracy: ±15 psi up to 18,000 psi maximum pressure
Weight: 3,100–3,600 lbs
Height: Smaller and more compact than previous quick-disconnect tensioners

Stud Engagement Interface

The SCT features a Quick Latch/Un-Latch mechanism, proven over 40+ years of successful field use. It engages RPV studs featuring either helical thread forms or annular grooves, ensuring compatibility and reliable operation across a wide range of installations.

Safety Features

Electronic Limit Switches verify:
- Full latch engagement with the RPV stud
- Piston stroke limits to protect equipment from overtravel
- Piston return completion before the next cycle
Secondary Seals route fluid bypass back to the reservoir, preventing external leakage
LCD Display provides clear, step-by-step instructions and operational feedback
High-Pressure Safety Valve automatically stops pressure buildup as a backup to electronic stroke protection
Emergency Stop Button on every control panel for immediate system shutdown

Integrated Pumping System

Built-in hydraulic power system eliminates external hoses and fittings, reducing leak risks and rigging time
Compact design saves refueling floor space and simplifies storage
Fully integrated hydraulic operation — no air supply required, eliminating airborne contamination

Performance Enhancements

Built-In Elongation Monitoring System (EMS) provides real-time tension feedback, enabling instant re-tensioning and eliminating time-consuming trim passes
Hydraulic Ram Actuators ensure smooth piston return without leakage during flange rotation
Master/Secondary System Configuration allows one SCT to control the entire network, with flexible handover between units

Design Integrity and Reliability

Plant-life durability for major components
High-strength forged steel housing withstands repeated compression stress
Modular design for easy maintenance and future technology upgrades
Allen-Bradley PLC controls ensure reliability and global service support

Low Maintenance and Reduced Crew Requirements

10-year spring-energised hydraulic seals reduce overhaul frequency and maintenance costs
Eliminates need for central pump service and periodic hose replacements
Single-operator control minimises manpower—each tensioner is easily handled by one technician
Simple switch-controlled stud engagement and built-on movement controls reduce operator fatigue
Integrated communication system synchronises all units for seamless operation

A Smarter, Safer, and Faster Tensioning Solution

The Biach Light Weight SCT redefines efficiency and safety in reactor pressure vessel tensioning. Its combination of compact design, advanced automation, and proven durability makes it the trusted choice for nuclear maintenance teams worldwide.

UK Locations

HEAD OFFICE
HI-PRESS HYDRAULICS

Riverside Works
Forge Road
Whaley Bridge
High Peak
SK23 7HY

T: +44 1663 735089
sales@hi-press.co.uk

LOCATION MAP

BRANCH OFFICE HI-PRESS HYDRAULICS

Unit 2
Hall House Ind Est
New Hutton
Kendal
Cumbria
LA8 0AH

T: +44 (0) 1539 734005
cumbria@hi-press.co.uk

Contact Form

Enerpac Hydraulic Equipment, Parts & Spares

Enerpac

Enerpac products are distributed worldwide, through the convenience of local service and support.

The Enerpac company dates back to 1910, when the original company produced water pumps for Ford’s legendary Model T motor car.

Enerpac’s reputation as a technology leader began in the 1920s when the first hydraulic jacks were introduced.

Hydraulic Products

Enerpac
Cylinders and Jacks
Hydraulic Pumps
System Components
Torque and Tension Tools
Flange Maintenance Tools
Hydraulic Presses
Cutters
Pullers

Links

Testing & Repairs
Case Studies
News
Privacy Policy
Contact Us
Cookie Policy

Tangye

Hi-Press Hydraulics offer the full range of Tangye Hydraulic Equipment including, Lifting equipment, lightweight aluminium jacks and other products like Pumps, and Service Kits.

Tangye
Hydraclaw Jacks
Hydramite Jacks
Hydralite Jacks
Hydrapak Pumps