1. Basic Information
Product Name: Hydrostatic Release Unit (HRU) – Model 73595
Product Code/Model: HRU 73595
Category: Lifesaving Appliance
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2. Intended Use
Main Application:
The Hydrostatic Release Unit (HRU) is designed to automatically release the liferaft in the event of vessel sinking. When the vessel sinks to a depth of 1.5 – 4 meters, the HRU is activated, allowing the liferaft to inflate and detach from the vessel for immediate use.
Application: Cargo ships, oil tankers, fishing vessels, passenger ships, offshore platforms, and other marine structures.
Benefits:
- Ensures maritime safety in emergency situations.
- Requires no periodic maintenance, reducing operational costs.
- Fully compliant with international standards: SOLAS, MED, USCG-MER, TC.
3. Instructions for Use
Installation:
Directly mounted to the liferaft according to the manufacturer’s instructions.
Applicable to all types of liferafts with capacity from 4 to 150 persons.
Operation:
Fully automatic operation, no crew intervention required.
Activates when the vessel sinks at a depth of 1.5 – 4 meters.
Maintenance & Periodic Inspection:
No maintenance required.
Must be replaced 2 years after installation on board or 4 years after manufacturing date, whichever comes first.
Safety Notes:
Use only the designated model for liferafts.
Incorrect installation may affect the automatic release function.
4. Technical Specifications
- Application Range: Liferafts from 4 – 150 persons.
- Activation Depth: 1.5 – 4 meters.
- Maintenance: Not required.
- Service Life / Replacement Interval:
- 2 years after installation on board.
- 4 years after manufacturing date.
- International Approvals: SOLAS, MED, USCG-MER, Transport Canada (TC).
- Tested & Certified by: Force Certification A/S.
5. Detailed Description & Key Features
Technology: Hydrostatic mechanism, automatically activated at a specific depth.
Key Advantages:
- Compact design, easy installation.
- High reliability, independently certified.
- No maintenance required, cost-efficient for shipowners.
- Excellent durability in harsh marine environments.
Points to Note:
- Must follow replacement intervals for safety assurance.
- HRU cannot be reused once activated.
Average Service Life: 2 years (from installation date).
6. Commercial Information
Manufacturer: Lalizas – Greece.
Accessories Included: User manual, certification labels.
Warranty & After-Sales Service:
- According to manufacturer’s and distributor’s policy.
- Typical warranty period: 12 – 24 months depending on terms.
MA RI Maritime Trading & Services Co., Ltd. Head Office: 183C/5P Ton That Thuyet St., Vinh Hoi Ward, Ho Chi Minh City
Offices and Stores
– Northern Region: 1423 Ngo Gia Tu St., Hai An Ward, Hai Phong City
– Southern Region: 389 Dao Tri St., Phu Thuan Ward, Ho Chi Minh City
– Central Region: 239 National Highway 1A, Binh Son Commune, Quang Ngai Province
Phone: (028) 3636 1640 / 090 3000 231









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