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HOME > BLOG

1500 Bar Hydraulic Bolt Tensioners – SST,SRT,MRT SPX Replacement SAIVS China

Author:SAIVS Time:2025-05-05 Click:

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, 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, 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, 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)


Tag: hydraulic bolt tensioners 1500 bar bolt tensioners subsea bolt tensioners industrial bolt tensioning tools

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