Heave Compensator

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Product Details:

Response Time < 150 ms (system response to wave movement)
Measurement Range Up to 5 meters heave compensation (model dependent)
Signal Type Analog/digital (as per optional sensor system)
Sensitivity High, suitable for dynamic sea conditions
Cable Length Customizablestandard 6-12 m for sensor/electric models
Sensor Type Integrated load and displacement sensors (optional)
Application Offshore platforms, oil and gas rigs, marine cranes, winch compensation
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Heave Compensator Product Specifications

Features Rugged, corrosion resistant, real time compensation, high reliability
Input Hydraulic / Mechanical Motion
Usage Offshore drilling rigs, marine lifting, and subsea operations
IP Rating IP66 or higher (for exposed electric/electronic systems)
Product Type Heave Compensator
Voltage Typically operates with 24V DC control system (if electrically actuated)
Operating Temperature -20C to +55C
Function Absorbs and compensates for vertical displacement due to wave motion
Resolution Millimeter-scale compensation (model dependent)
Power Consumption Depends on system, generally 2-5 kW (electric control units)
Mounting Type Flange or frame-mounted to deck machinery or lifting equipment
Interface PLC, HMI, remote monitoring (optional)
Signal Type Analog/digital (as per optional sensor system)
Accuracy Up to 2% (depending on system integration)
Response Time < 150 ms (system response to wave movement)
Measurement Range Up to 5 meters heave compensation (model dependent)
Material High-strength Alloy Steel & Industrial-grade Components
Sensor Type Integrated load and displacement sensors (optional)
Application Offshore platforms, oil and gas rigs, marine cranes, winch compensation
Wireless Available as option for sensor monitoring
Sensitivity High, suitable for dynamic sea conditions
Output Controlled vertical displacement/minimized load oscillation
Weight Approx. 3200 kg (varies by capacity and model)
Cable Length Customizablestandard 6-12 m for sensor/electric models

Noise Level Low-noise operation, <70 dB(A) at 1 m (hydraulic)
Custom Options Variable stroke, custom anchorage points, sensor package
Design Standard Meets ISO 13628-7 and API RP 2SK guidelines
System Integration Compatible with most offshore control systems
Serviceability Modular design for easy maintenance
Operating Medium Hydraulic oil (ISO VG 32-46 recommended)
Finish Type Marine-grade anti-corrosive coating
Max Load Capacity Up to 150 metric tons (varies per specification)
Shock Absorption Integrated damping cylinder for anti-impact protection

Product Description

Technical Data
Operating temp:	- 40 ...+ 60 degrees C
	-40 ...+ 140 degrees F
Certification:	ATEX, IECEx, CSA
Weight:	15 lbs (6.8 kg)
Protection:	IP 54 (structure)
Material Structure:	Coated Aluminum
Tension Springs:	Dual springs
Mechanism:	Aluminum
Material Pulleys:	Aluminum
Material Cable:	Stainless Steel 2.2mm
Material Encoder:	Depends on Model
Tension on Cable:	Between 15 and 20N
Max Reel Out Accel:	25m/s2
Max Reel In Accel:	10m/s2
Cable Break Load:	3,622 N
Max Static Torque:	35N
Max Static Torque:	35N
Total Error:	+/- 2.2mm

Part Number

EM9FA4 / 10CD - 10m cable
EM9FA4 / 12CD - 12m cable
EM9FA4 / 15CD - 15m cable
EM9FA4 / 18CD - 18m cable

After the 10CD, 12CD, 15CD or 18CD add first 4 digits ofencoder to be used so we can make the adaptor flange

Output Options from Encoder

Any standard drawworks (NAMFPX) series encoders
Incremental 5...24V
Incremental NAMUR
Tachometer

Multi-turn solid shaft encoders

Absolute Parallel
Absolute ProfiBus
Absolute Device Net

Superior Performance in Dynamic Sea Conditions

Engineered to maintain precision in unpredictable marine environments, the Heave Compensator offers high sensitivity and millimeter-scale compensation. Its integrated sensor options and rapid response time (<150 ms) deliver real-time vertical displacement control, ensuring stability and safety during offshore lifting, subsea operations, and drilling.

Easy Integration and Low Maintenance

Designed for straightforward compatibility with offshore control systems including PLC and HMI interfaces, the modular construction of the Heave Compensator streamlines servicing and parts replacement. It accommodates both flange and frame-mounted installations with customizable cable lengths and wireless monitoring options.

Customizable for Diverse Offshore Applications

With variable stroke, custom anchorage points, and optional load/displacement sensors, this system adapts to varying operational and environmental needs. Built to meet ISO 13628-7 and API RP 2SK standards, it is trusted across oil and gas rigs, marine cranes, and winch compensation applications worldwide.

FAQs of Heave Compensator:

Q: How does the Heave Compensator improve safety and stability on offshore platforms?

A: By absorbing and compensating for vertical displacement due to wave motion, the Heave Compensator minimizes load oscillation and impact forces. This leads to safer lifting, precise positioning, and enhanced protection for personnel and equipment during dynamic sea conditions.

Q: What process is involved in integrating the Heave Compensator with existing offshore systems?

A: Integration typically requires connection to platform control interfaces like PLC, HMI, or remote monitoring systems. The compensators adaptable design and standard signal options (analog/digital) ensure compatibility with most control architectures. Installation can be flange or frame-mounted, with customizable cable lengths and wireless monitoring options available.

Q: Where is the Heave Compensator typically used, and who benefits from its application?

A: It is widely employed in offshore drilling rigs, marine cranes, subsea operations, and winch compensation. Operators, rig managers, and vessel crews benefit from minimized load movement, improved safety, and enhanced operational efficiency during heavy lifts and marine transfer tasks.

Q: What maintenance advantages does the modular design of the Heave Compensator provide?

A: The modular architecture allows for quick access to service points, efficient component replacement, and reduced downtime during routine checks. This design simplifies on-site maintenance and supports long-term reliability in harsh marine environments.

Q: When is it recommended to select variable stroke or custom anchorage for a compensator system?

A: Variable stroke and bespoke anchorage options should be considered when lifting requirements or deck configurations differ from standard applications. Customization ensures the compensator delivers optimal displacement accuracy and matches specific project needs or equipment layouts.

Q: What operating conditions and environmental protections are provided by the system?

A: With an IP66 or higher rating for exposed electrical/electronic components, the compensator operates reliably from -20C to +55C. The marine-grade anti-corrosive coating and rugged alloy construction protect against saltwater, humidity, and mechanical wear.

Q: How do integrated sensors contribute to performance and ease of monitoring?

A: Optional load and displacement sensors provide real-time feedback and precise control, enhancing measurement accuracy up to 2%. These sensors enable PLC or remote monitoring, streamlined operations, and better predictive maintenance, with wireless options available for flexible data access.

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