High-Performance 1500 Bar Hydraulic Bolt Tensioners | SST, SRT & MRT Models | SAIVS

Reliable Hydraulic Bolt Tensioning Solutions for industrial applications

In demanding industrial sectors such as oil & gas, power generation, and marine engineering, precision bolt tensioning is essential for safety, reliability, and performance. SAIVS offers a comprehensive range of 1500 bar Hydraulic Bolt Tensioners, including Subsea (SST), Spring Return (SRT), and Manual Return (MRT) models—engineered to replace SPX legacy systems with improved durability, accuracy, and cost-effectiveness.

Why Choose SAIVS Hydraulic Bolt Tensioners?

SAIVS bolt tensioners are engineered for heavy-duty industrial use, covering a wide range of bolt sizes (M20 to M115) and load capacities (140 kN to 4100 kN). Our products ensure high clamping force, easy operation, and long-term reliability in extreme conditions.

Core Features:

• 1500 Bar / 21,750 psi Operating Pressure
  Delivers consistent, high clamping force for critical bolted joints.

• Wide Bolt Compatibility (M20–M115 | 3/4"–4")
  Flexible sizing to fit various flange and machinery requirements.

• Large Hydraulic Area (934–27,340 mm²)
  Ensures even and powerful load distribution.

• Three Return Options:

  • Spring Return Tensioners (SRT)

  • Manual Return Tensioners (MRT)

  • Subsea Tensioners (SST)
    Suitable for both surface and underwater environments.

SAIVS Bolt Tensioner Series & Technical Specifications

SRT, 1500 bar Spring Return Bolt Tensioners

SRT Series – Spring Return Bolt Tensioners

• Models: SRT0 to SRT8

• Piston Stroke: 10 mm

• Tool Load: 160–4100 kN

• Best For: Quick-release, high-efficiency operations.

SST, 1500 bar Subsea stud Bolt Tensioners

SST Series – Subsea Bolt Tensioners

• Models: SST1 to SST8

• Piston Stroke: 20–30 mm

• Tool Load: 140–3447 kN

• Best For: Corrosive, deep-water, and subsea environments.

MRT, 1500 bar Manual Return Bolt Tensioners

MRT Series – Manual Return Bolt Tensioners

• Models: MRT1 to MRT7

• Piston Stroke: 10–15 mm

• Tool Load: 280–3200 kN

• Best For: Controlled tensioning in high-torque applications.

Industrial Applications

SAIVS hydraulic bolt tensioners are widely used in:

• Oil & Gas (Subsea and Onshore)

• Power Generation (Turbine Flanges, Nuclear Reactors)

• Heavy Machinery (Presses, Crushers)

• Marine & Shipbuilding (Propulsion, Deck Systems)

• Infrastructure (Bridges, Pipelines)