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DF-501
RAISED MULTI-BOLT OVAL HATCH
| MODEL NO. | A | B | C | D | E | WT.(lbs) |
| DF-501 | 28 3/4" | 20" | 23" | 15" | 2 1/2" | 95 |
| DF-502 | 29 3/4" | 23" | 24" | 18" | 2 1/2" | 106 |
| NO. | Name & Specifications | Qty | Material |
| 1 | COVER | 1 | STEEL |
| 2 | COAMING | 1 | STEEL |
| 3 | GASKET | 1 | NEOPRENE |
Product Overview
This heavy-duty bolt fixed hatch cover is a core outfitting component designed specifically for high-pressure and high sealing requirements scenarios. Unlike ordinary spinning hatch covers, it adopts a full circumference bolt flange locking structure, providing huge axial compression force through high-strength bolt groups, ensuring that the hatch cover can still maintain absolute sealing in high-pressure, high-pressure, or vacuum environments. It is suitable for deep compartments, pressure vessels, and various heavy-duty maintenance openings on ships.
Core Differences and Advantages
1. Forced sealing, zero leakage
Full bolt fixed design: Combined with thickened sealing gaskets, uniform force is applied through the surrounding bolts to achieve triple sealing of oil tightness, air tightness, and water tightness.
Pressure and vacuum resistance: It can withstand pressures up to 1.6MPa or high vacuum environments, eliminating the risk of hatch cover flying off due to pressure changes.
2. Heavy duty structure, safe and stable
Thickened flange: Both the base and cover plate are made of thickened sheet metal or cast, with excellent impact resistance and tensile strength.
DF-501 standard specifications: comply with national standards and maritime regulations, and can provide CCS and other classification society certifications to ensure navigation safety.
3. Long term anti-corrosion and long-lasting service life
Surface treatment: High quality anti-corrosion topcoat (orange/gray optional) is used, with strong adhesion, salt spray resistance, and aging resistance, suitable for marine atmosphere and corrosive environments.
Application Fields&Scenarios
Ship outfitting: maintenance manholes for deep compartments, ballast tanks, fuel tanks, and lubrication tanks of ships.
Maritime equipment: maintenance ports for engine room boilers, heat exchangers, and pressure tanks.
Industrial pressure vessels: quick access covers for chemical storage tanks, reaction vessels, and liquid storage tanks.
Special engineering: Closed space openings for underwater work platforms and offshore drilling platforms.
Technical Specifications
Shape: Elliptical/Circular (customizable)
Connection method: Bolted fixation
Main material: Carbon steel/Stainless steel 304/316L
Sealing form: Rubber gasket sealing
Surface treatment: epoxy anti-corrosion paint/hot-dip galvanizing
Core standards: ISO/GB/CB/T marine standards
Why choose us?
★Manufacturer direct supply: Produced by the source factory, with stable quality and obvious price advantages.
★Flexible customization: Supports full customization based on size, material, and color.
★Export qualifications: Complete set of export inspection and classification society certificates, exported to global markets such as Europe, America, Southeast Asia, and the Middle East.
