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DF-464-5
HEE
DF-464-5/DF-174-5 4 DOG RAISED WATERTIGHT HATCH
MODEL NO. | A | B | C | WT.(lbs) |
| DF-464-5 | 24 1/4" | 18 1/4" | 5" | 112 |
| DF-174-5 | 23" | 15" | 5" | 95 |
| NO. | Name & Specifications | Qty | Material |
| 1 | COVER | 1 | STEEL |
| 2 | COAMING | 1 | STEEL |
| 3 | GASKET | 1 | NEOPRENE |
| 4 | DOG HANDLE | 4 | CAST IRON |
| 5 | TUMBLE BOLT | 4 | BRONZE |
The 4-Dog Raised Watertight Marine Hatch delivers a balanced solution for marine access needs, combining reliable sealing performance with straightforward operation. As mid-sized vessels seek equipment that balances functionality and cost-effectiveness, this hatch has become a staple in commercial fishing, workboats, and coastal patrol vessels . With a standard opening size of 20 × 16 inches and weight of 120 lbs, it provides ample access for maintenance personnel while maintaining watertight integrity in moderate sea conditions. The four-dog latching system offers a practical compromise between the simplicity of fewer latches and the enhanced sealing of more complex systems.
The four adjustable stainless steel dogs are positioned at 90° intervals around the hatch perimeter, ensuring balanced pressure distribution across the sealing surface . Each dog features fine-thread adjustment to compensate for deck irregularities, with a visible indicator showing proper engagement. This symmetric design ensures consistent compression even as the vessel flexes during operation.
The hatch cover combines a steel frame with a composite reinforced polymer panel, reducing weight by 25% compared to all-steel designs while maintaining structural integrity . The composite surface resists UV degradation and chemical exposure, while the steel frame provides secure attachment points for the latching mechanism and hinge assembly. This hybrid construction minimizes maintenance requirements in harsh environments.
Equipped with an oversized ergonomic handle and integrated lever system, the hatch can be operated with minimal effort, even in cold conditions with gloved hands . The raised profile provides 3 inches of clearance above the deck, facilitating easy grip access while creating a protective lip against water runoff. All operating components are designed for tool-free maintenance and replacement.
The four-dog system provides better pressure distribution than 3-dog designs while remaining simpler to operate than 6-dog models, offering an optimal balance of sealing performance and operational efficiency . This configuration is particularly effective for medium-sized openings where uniform compression is essential but complex latching isn’t required.
The 4-Dog Raised Watertight Marine Hatch maintains watertight integrity at hydrostatic pressures up to 3 psi, suitable for most deck and hull applications on coastal and offshore vessels operating in up to Sea State 5 conditions.
Yes, the latching system includes a dual-sided locking mechanism that allows secure closure from either side of the hatch . This feature enhances safety by providing containment capability regardless of which side access is needed.
The primary seal consists of a nitrile rubber gasket rated for temperatures from -30°C to 100°C, providing excellent resistance to oil, fuel, and water exposure . Optional EPDM gaskets are available for applications requiring enhanced chemical resistance or wider temperature tolerance.
The reinforced composite cover withstands wind loads up to 100 knots, while the secure latching system prevents accidental opening in heavy seas . The drainage channel around the perimeter diverts water away from the sealing surface, maintaining integrity even during heavy rainfall or deck washing.
DF-464-5/DF-174-5 4 DOG RAISED WATERTIGHT HATCH
MODEL NO. | A | B | C | WT.(lbs) |
| DF-464-5 | 24 1/4" | 18 1/4" | 5" | 112 |
| DF-174-5 | 23" | 15" | 5" | 95 |
| NO. | Name & Specifications | Qty | Material |
| 1 | COVER | 1 | STEEL |
| 2 | COAMING | 1 | STEEL |
| 3 | GASKET | 1 | NEOPRENE |
| 4 | DOG HANDLE | 4 | CAST IRON |
| 5 | TUMBLE BOLT | 4 | BRONZE |
The 4-Dog Raised Watertight Marine Hatch delivers a balanced solution for marine access needs, combining reliable sealing performance with straightforward operation. As mid-sized vessels seek equipment that balances functionality and cost-effectiveness, this hatch has become a staple in commercial fishing, workboats, and coastal patrol vessels . With a standard opening size of 20 × 16 inches and weight of 120 lbs, it provides ample access for maintenance personnel while maintaining watertight integrity in moderate sea conditions. The four-dog latching system offers a practical compromise between the simplicity of fewer latches and the enhanced sealing of more complex systems.
The four adjustable stainless steel dogs are positioned at 90° intervals around the hatch perimeter, ensuring balanced pressure distribution across the sealing surface . Each dog features fine-thread adjustment to compensate for deck irregularities, with a visible indicator showing proper engagement. This symmetric design ensures consistent compression even as the vessel flexes during operation.
The hatch cover combines a steel frame with a composite reinforced polymer panel, reducing weight by 25% compared to all-steel designs while maintaining structural integrity . The composite surface resists UV degradation and chemical exposure, while the steel frame provides secure attachment points for the latching mechanism and hinge assembly. This hybrid construction minimizes maintenance requirements in harsh environments.
Equipped with an oversized ergonomic handle and integrated lever system, the hatch can be operated with minimal effort, even in cold conditions with gloved hands . The raised profile provides 3 inches of clearance above the deck, facilitating easy grip access while creating a protective lip against water runoff. All operating components are designed for tool-free maintenance and replacement.
The four-dog system provides better pressure distribution than 3-dog designs while remaining simpler to operate than 6-dog models, offering an optimal balance of sealing performance and operational efficiency . This configuration is particularly effective for medium-sized openings where uniform compression is essential but complex latching isn’t required.
The 4-Dog Raised Watertight Marine Hatch maintains watertight integrity at hydrostatic pressures up to 3 psi, suitable for most deck and hull applications on coastal and offshore vessels operating in up to Sea State 5 conditions.
Yes, the latching system includes a dual-sided locking mechanism that allows secure closure from either side of the hatch . This feature enhances safety by providing containment capability regardless of which side access is needed.
The primary seal consists of a nitrile rubber gasket rated for temperatures from -30°C to 100°C, providing excellent resistance to oil, fuel, and water exposure . Optional EPDM gaskets are available for applications requiring enhanced chemical resistance or wider temperature tolerance.
The reinforced composite cover withstands wind loads up to 100 knots, while the secure latching system prevents accidental opening in heavy seas . The drainage channel around the perimeter diverts water away from the sealing surface, maintaining integrity even during heavy rainfall or deck washing.
