19" 4-Dog Raised Bolt Hatch (Model #SS343-19R-A) - Stainless Steel

The Model SS343-19R-A pairs the debris-deflecting benefits of a 5" raised coaming with the total environmental immunity of high-grade stainless steel. The fast-acting 4-point dogging layout eliminates the risk of frozen or rust-bound fasteners common on exposed decks. This ensures that the hatch can always be quickly unlatched by hand for routine safety checks or washdowns, even after years of continuous saltwater exposure.

Intended Use Cases:

• Corrosive or Chemical Storage Access: Perfect for direct access into chemical containment holds, wastewater cells, or tanks exposed to harsh process fluids.
• Severe Marine Elements: Built for exposed weather decks, swim platforms, and work zones constantly hammered by high-salinity ocean spray.
• Sanitary & Food Grade Holds: Non-reactive stainless steel construction makes this model ideal for potable water storage and food processing compartments on commercial ships.

Primary Industries & Vessel Types:

• Chemical & Liquid Cargo Barges: Heavily utilized on specialized transport vessels requiring strict cargo purity and chemical containment.
• Seafood Processing Ships & Trawlers: Built to withstand aggressive organic compounds, blood tracking, and daily high-pressure chemical sanitization.
• Offshore Energy Platforms & OSVs: Ideal for extreme offshore environments where regular steel components suffer rapid atmospheric pitting and rust.

• Raised Coaming Protection: Features a 5" elevated vertical frame wall that acts as a natural structural barrier against pooling water, mud, and deck debris.
• Fast-Acting 4-Dog Mechanism: Replaces tedious multi-bolt perimeter rings with 4 high-leverage stainless steel tightening dogs, vastly reducing the time required to secure or open the hatch.
• Premium Stainless Steel Construction: Cover plate, 5" coaming, and dog hardware are crafted from high-grade stainless steel for extreme structural strength and superior resistance to chemical pitting.
• Buna-N High-Compression Gasket: Features a premium Buna-N (Nitrile) rubber gasket track providing excellent sealing performance and broad resistance to fuels, oils, and marine chemicals.
• Industrial Clean Finish: Delivered fully finished and polished, offering a professional appearance that eliminates the need for painting, priming, or coating maintenance.

• Qualified Personnel Requirement: Installation of the 19” stainless steel raised hatch must be performed by qualified marine welders or fitters in accordance with applicable classification society standards.
• Stainless Steel Welding Notice: Appropriate stainless steel welding procedures, including correct filler rods and shielding gases, must be utilized when integrating this frame over the 21" cutout to preserve its corrosion-resistant properties.
• Galling Prevention: Apply a high-quality marine anti-seize lubricant specifically rated for stainless steel to all adjustable dogging hardware threads before final calibration to completely prevent thread galling or cold-welding.
• Surface Preparation & Alignment: The 5" raised coaming must be perfectly aligned over a clean 21" deck cutout and securely welded to prevent thermal warping or twisting of the perimeter sealing seat during fabrication.
• Dog Tension Calibration: Following structural welding, adjust individual dog tension nuts to ensure the cover seats evenly across the entire frame and compresses the Buna-N gasket uniformly.
• Mechanical Verification: Cycle all 4 mechanical dog levers to verify they articulate smoothly and lock down tightly without catching or binding.
• Debris Inspection: Prior to closing, ensure that the gasket track, coaming rim, and dog catch plates are completely free of weld spatter, slag, rust, or heavy topcoat accumulation.