50–120mm Watertight Dog Type Cable Clench | Anchor Chain Release Device for Ship Mooring

Product Overview

CB/T 3143 watertight dog type cable clench is designed as a critical safety component for anchor chain release systems.

It is suitable for Grade 2 and Grade 3 anchor chains with diameters from 50 mm to 120 mm.

Equipped with O-ring sealing structure, it ensures watertight integrity of the chain locker under tested pressure conditions.

The device enables controlled holding and emergency release of anchor chain, protecting vessel safety under overload conditions.

Quick Specifications

• Chain Diameter: 50–120 mm → Defines compatibility with anchor chain
• Chain Grade: Grade 2 / Grade 3 → Applicable strength level
• Watertight Pressure: 0.03 MPa / 5 min → Ensures chain locker sealing
• Release Mechanism: Dog type + hammer → Enables quick release
• Pin Strength Logic: 15–30% breaking load → Controlled failure protection
• Seal: O-ring rubber → Ensures watertight performance
• Lubrication: Grease channel pin → Smooth operation
• Material: C-Mn steel / stainless steel → Strength and durability
• Surface: Sa2.5 + primer → Corrosion protection

Main Technical Parameters

Selection Guide

Step 1 – Select Chain Diameter → 50–120 mm based on anchor chain

Step 2 – Confirm Chain Grade → Grade 2 or Grade 3

Step 3 – Confirm Watertight Requirement → Required for chain locker sealing

Step 4 – Confirm Release Requirement → Emergency quick release needed

Step 5 – Confirm Pin Safety Logic → Controlled break at overload

Step 6 – Confirm Certification → Class society requirement

Structure

Body | Dog locking mechanism | Release pin | O-ring seal | Lubrication pin | Hammer release system

Custom Attributes

• Chain Diameter: 50–120 mm → Compatibility
• Watertight Seal: O-ring → Prevent water ingress
• Release: Hammer operation → Quick emergency release
• Pin Strength: 15–30% BL → Safety protection
• Lubrication: Grease groove → Smooth operation
• Material: C-Mn steel → Structural strength
• Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS, Makers Test Certificate

Inquiry Guide

Please provide chain diameter, chain grade, watertight requirement, and class certification requirement.

How It Works

The chain is locked by the dog mechanism. Under emergency, the pin can be released by hammer, allowing the chain to run out safely. The pin is designed to break under controlled overload, ensuring vessel safety.

Applications

Anchor chain locker | Emergency chain release system | Ship safety system

Certifications & Advantages

Certification: CCS, NK, BV, ABS, DNV, LR, KR, IRS, RS, RINA, CRS; watertight tested, controlled release safety design, reliable locking mechanism.

Drawing & Photos

GA drawing | Installation layout | Product photos

Ordering

MOQ: 1 | Delivery: 30–60 days

FAQ

Q1: What is the function of the dog type cable clench?

A: It holds and releases anchor chain safely.

Q2: How does the safety pin work?

A: It breaks under 15–30% of chain breaking load to ensure emergency release.

Q3: Why watertight design?

A: To maintain chain locker sealing and prevent water ingress.