NPDS3500H_Technical_description.pdf
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- Attached to
- Essayons Overhaul FY27
- Solicitation number
- W9127N26BA029
About this file
This is a technical description document for the Noreq NPD series davits, specifically the NPDS 3500H model, designed for safe launch and retrieval of rescue and lifeboats in marine and offshore environments.
The davit system is engineered for long-term reliable operation in harsh marine conditions and complies with IMO/SOLAS requirements, LSA Code, and European Council Directive 96/98 on Marine Equipment (MED). The system features a compact plate construction with all equipment integrated inside the structure for protection against water, ice, and sand. Key design advantages include shot blasting to SA 2.5 with three-layer paint coating (250 microns total dry film thickness), pad-eyes for lifting, stainless steel bolts, inspection/maintenance hatches for equipment access, and an automatically refilled accumulator for emergency pivoting. Installation is simplified with only three welding points required. The system includes a two-speed electric/hydraulic driven winch for both launching and recovery operations, with launch control available from inside the boat or via remote control unit.
The technical specification encompasses hydraulic, electric, and mechanical systems. The hydraulic system includes an internal power pack unit, double-acting cylinders with over-center valves, hydraulic/electric motor for winching, and hand pump for emergency operations. The electric system operates on 380/50 Hz or 450/60 Hz standard power with a starter box featuring stand-by heating, removable control unit with 5-meter cable, and battery backup with charger. Wire components include galvanized wire rope with thimbles and metalized sheaves with bearings. Optional accessories available include radio control, ex-proof certification, high-speed winch (50 m/min), tension and shock absorber systems, transformers, and additional equipment such as hooks, ladders, and aluminum hinges.
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Text version
Revision no: 01 Rev date: 27.04.2010
Doc No:
NPDS3500H-DOC-SA-178-01
Technical description
NPD series
NPDS 3500H Page 1 of 4 www.noreq.no
Product Advantages
1. Noreq davit construction is a compact plate construction. Given benefits is that all needed equipment is mounted inside the structure well protected against, -water, -ice, -sand etc.
2. Noreq davit as standard is shot blasted to SA 2.5 and coated with three layer of paint.
3. Noreq davit has pad-eyes for lifting which makes it beneficial for mounting on board.
4. Noreq davit is provided with stainless steel bolts
5. Noreq davit is fitted with several inspection/maintenance hatches for easy access to all equipments built inside. (Hydraulic components mounted on hatches!)
6. Noreq davit is fitted with one accumulator for emergency pivoting which is automatically refilled as long as the power is on. An indicator is installed to view actual pressure.
7. Noreq davit is designed for easy installation with only three (3) welding points.
3. Pad eye for lifting
2. Coating 250 microns
7. Small footprint Mounting & welding
6. Automatically refilled accumulator
5. Inspection hatches for easy access to equipment
4. Stainless steel bolts
1. Closed welded design
1. Equipment & fittings built inside
6. Digital accumulator indicator
Doc No:
NPDS 3500H Page 2 of 4
1. General Description
The Noreq NPD series davits are specifically designed for safe and efficient launch and retrieval of rescue and lifeboats. It is intended for long term, reliable operation in harsh and hazardous marine and offshore environments. The davit system is designed in accordance with latest IMO/SOLAS requirements, LSA Code and European Council Directive96/98 on
Marine Equipment (MED). It’s carefully considered and epoch making design, gives advantages when it comes to maintenance and service, installation and deck preparations, and protecting of equipment in arctic and tropical climate. All equipment is integrated inside the davit structure.
Launching of the lifeboat/rescue boat is performed either from inside the boat or from remote control unit supplied as standard. For safe recovery of the lifeboat/rescue boat the system is delivered as standard with 2 speed electric/hydraulic driven winch.
2. System structure
Davit structure
Davit structure is of closed welded design with all necessary equipment mounted inside. The structure is positioned by the hydraulic cylinder and incorporates all required sheaves, winch
, power pack , accumulator etc.
Winch structure
A winch with an integrated gear in a closed oil bath. The winch, suited for power driven hoisting and lowering procedures, consist of the following main parts:
- Single drum, supported in roller type bearings
- Planetary speed reducer gear with built-on brake
- Hydraulic motor with brake valve (see hydraulic system)
Doc No:
NPDS 3500H Page 3 of 4
Hydraulic system
The hydraulic system for controlling of the davit functions is consisting of the following units:
- Hydraulic power pack unit built inside the davit
- Electric motor (see electric system)
- Valve , sensors and blocks
- Hydraulic cylinders of the double acting type, containing self aligning bearings on each side and executed with over centre valve.
- Hydraulic/electric motor on the winch, hoisting/lowering the boat with the desired low speed and high speed (see technical data sheet)
- Accumulator (stored power) for emergency handling.
- hand pump for emergency hoisting and manual filling of accumulator.
Electric system
The electric system is consisting of the following units:
- standard power is 380/50 Hz or 450/60 Hz
- Starter box with stand-by heating element placed inside davit structure with electric cables between starter box and removable control unit with a 5 meter cable.
- Electric motor with stand still heating directly driving the pump through a flexible coupling.
- Operation tableau is supplied as standard equipment
- equipment inside davit structure has standard minimum IP grade 56 and equipment outside minimum IP grade 66
- Battery back up with battery charger for automatic operation of valves for emergency handling
Wire and wire-components
Galvanized wire rope with thimble in one end.
- Metalized wire sheaves with bearings
Lashing/guiding system
Lashing arrangement for the rescue boat is included on the davit.
Doc No:
NPDS 3500H Page 4 of 4
3. Conservation
All steelwork is shot blasted to SA 2.5 and coated with three layer of paint. One layer of primer and two layer of top coat. Total dry film thickness approx 250 microns. All finishing paint requirements can be met, ask for details and prices.
4. Optional Accessories
• Extra painting system
• Radio control
• Ex proof
• Electrical power type
• Alert for battery change
• Hook
• Transformer 42V AC 500 VA
• High speed winch 50 m/min
• Tension system
• Shock absorber system
• Aluminium hinges
• Ladder
Product Name Binder VS
Application Method
Site or Shop
DFT
micron
Coverage
TSR
m2/l Thinner Comments
Interseal
670HS
Polyamide cured Epoxy 82
Airless Spray, Brush, Roller, Air Spray
Not Defined 100 100 6.56 International
GTA220 Alu version
Interseal
670HS
Polyamide cured Epoxy 82
Airless Spray, Brush, Roller, Air Spray
Not Defined 100 100 6.56 International
GTA220 Grey or RAL version
Interthane
Aliphatic acrylic Polyurethane
Airless Spray, Brush, Conventional Spray, Roller, Air Spray
Not Defined 50 100 11.40 International
GTA713 RAL 9003
| General Description |
| System structure |
| Conservation |
File details come from the government source that posted it. Updated .