High Quality 25 Ton Big Lifting Capacity Hydraulic Ship Crane Marine Crane with Knuckle Boom Folding Arm

Product Description

Product Description

High Quality 25 Ton Big Lifting Capacity Hydraulic Ship Crane Marine Crane with Knuckle Boom Folding Arm

SQ25ZA3T Knuckle Boom Mariner Crane
Max Lifting Capacity	Ton	25
Max Lifting Moment	Ton.m	62.5
Recommend Power	KW	50
Hrdraullic System Flow	L/Min	80
Hydraulic System Pressure	Mpa	31.5
Oil Tank Capacity	L	300
Self Weight	kg	6950

1. Structure & Materials

• Polygon Boom Profile: Octagonal/hexagonal cross-section delivers superior alignment and high bending resistance.

• Baosteel 700 Steel: High-strength steel plates optimize the structural weight-to-strength ratio.

• Compact Footprint: Lower deadweight and higher payload with a low center of gravity for enhanced transit stability.

• Balanced Hook Pulley: Lateral guide wheels and limit plates ensure uniform force and longer bearing lifespans.

• Enlarged Internal Pulley: Maximized diameter improves load-telescoping capability and extends wire rope service life.

• Optimized Boom Sliders: Large-scale slider design minimizes specific pressure and reduces boom wear.

• Integrated Boom Head: Unified structural design provides significantly higher load-bearing capacity than split alternatives.

• Dual-Cylinder Telescopic: Two-cylinder setup with wire rope pulleys protects internal rigging and maintains mid-range capacity.

2. Performance & Versatility

• Telescopic Boom Model: Engineered specifically for heavy-duty lifting operations in open maritime environments.

• Knuckle Boom Model: Dual four-bar luffing mechanism with reverse folding excels in confined/narrow spaces.

• Negative Angle Operation: Dual knuckle booms feature upward articulation to easily access ultra-low clearance zones.

• Quick-Change Attachments: Supports rapid modular coupling with winches, augers, aerial baskets, hydraulic grabs, and cargo forks.

• Multi-Scenario Solutions: All-in-one system for marine lifting, drilling, aerial work, demolition, and material handling.

3. Hydraulics & Drive System

• Disc-Spring Braking: Equipped with counter-balance valves and friction brakes for smooth, high-efficiency operations.

• Hydraulic Lowering Balance: Utilizes dedicated balance valves to counter loads safely during descent.

• Reverse Cylinder Layout: Flange-connected balance valve eliminates exposed external piping, preventing leaks and impacts.

• Planetary Gear Motor: Low-speed, high-torque configuration matched with a large-diameter drum.

• Dual Planetary Reducer: Delivers exceptionally stable hoisting performance with minimal braking impact.

• Multi-Plate Friction Brake: Provides high braking torque, silent operation, and an extended service lifespan.

4. Safety & Protection

• Smart Load Moment Limiter: Real-time load-ratio tracking with automatic motion cut-off during overload conditions.

• Triple Anti-Collision: Features automatic braking, buffer-stop controls, and a wedge-locked anti-backlash device for over-winding/unwinding protection.

• Wireless Remote Control: Enables precise, proportional control from up to 50 meters away in complex environments.

• High-Position Seating: Provides an unobstructed, zero-blind-spot view for direct and accurate positioning.

• Wire Rope Protection: Anti-derailment design on lower pulleys guarantees high stability during hoist cycles.

Company Profile

CNS Machinery (Xuzhou) Co., Ltd., located in Xuzhou, hometown of machinery production base,a ISO9001:2015 certified manufacturer of Truck mounted and Marine cranes, Aerial Work Platform Vehicles and Truck taillift. By maintaining strict inspection systems from raw materials to finished product, since 2006 when the factory was established, and now has integrated R&D, fabrication and domestic transportation systems and sales. Based on  rapid development and growth, we started export in 2015, and expanded our factory to 60000 m2 in 2023 to meet the higher demand.

CNS has strict inspection systems from raw materials to finished products, 'Never compromise in quality' is the basic principle,with ISO9001, BV, CE, and CCS, ABS, DNV, API2C cert. for marine cranes.

CNS invests nearly quarter of saleroom in R&D and provides OEM/ODM service for both in and aborad. CNS products have been exported to Middle East, South East Asia, South America , Russia , Turkey and other European countries.

Cooperate With

Certifications

Packaging & Shipping

Global Sales

CNS Advantage

FAQ

Are you a manufacturer?
Yes! We are the manufacturer established in 2006 and started selling overseas in 2015.
Offer OEM/ODM service of marine cranes.

Why choose CNS?
Source factory! Save your cost margin to higher quality and machining precision!
12 months warrranty!
Strong R&D team!
Flexible payment term. L/C is highly welcomed.
Cooperated shipping agent, saving more cost.

What is the way for delivery?
Mainly by shipment.
Optional railway for neighborhood countries.
 DHL, TNT, UPS,or FedEx for light accessories which are needed urgently.

What are your warranty terms?
12 months or 2000 working hours structural warranty on all our products, except failure caused by improper installation, operation or maintenance, accident, damage which are not caused by CNS.

What is your lead time?
We expanded and rebuilt factory to another 60000sqm to meet higher demand.
Stock order: 3-5 working days,
customized orders within 1-2 weeks.
Contact CNS service team to get an accurate lead time.

Are your marine cranes certified for international markets?
Yes. CNS Machinery marine cranes can be supplied with international certifications such as:
CCS, BV, ABS, DNV, LR, CE.
We support export projects for shipyards, offshore platforms, fishing vessels, harbor operations, and marine engineering companies worldwide. Our cranes are designed to meet strict international safety and structural standards for long-term offshore operation.

How do your marine cranes perform in harsh offshore environments?
CNS Machinery marine cranes are engineered for demanding marine conditions through:
High-strength Baosteel 700 steel structure
Anti-corrosion marine coating systems
Sealed hydraulic components
Reinforced boom design
Stable slewing and lifting systems
Extended wire rope service life
Our cranes are widely used in coastal, offshore, and heavy-duty marine applications where durability and low maintenance are critical.

What after-sales service and technical support do you provide?
CNS Machinery provides comprehensive global after-sales support, including:
Installation guidance
Hydraulic and electrical technical assistance
Spare parts supply
Remote troubleshooting
Maintenance recommendations
Fast response export service
We focus on long-term cooperation with overseas distributors, shipyards, and engineering contractors to ensure stable crane operation throughout the equipment lifecycle.