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DF-474
Product style and specification parameters
Core material:
Main body: Carbon steel (sprayed with orange anti-corrosion paint)/Stainless steel 304/316L/Aluminum alloy
Seals: Nitrile rubber (oil resistant)/Fluororubber (strong corrosion resistant)/Neoprene rubber (seawater aging resistant)
Safety components: Galvanized carbon steel/stainless steel chain and handle
★DF-474 TWIST LOCK HATCH
MODEL NO. | ΦA | ΦB | ΦC | WT.(lbs) |
| DF-474 | 24 3/4" | 20" | 18 3/4" | 85 |
| NO. | Name & Specifications | Qty | Material |
| 1 | COVER | 1 | CAST STEEL |
| 2 | RING | 1 | CAST STEEL |
| 3 | GASKET | 1 | NEOPRENE |
Leakage test: Pressure 0.04MPa
Other optional extras include: hot dipped galvanized, stainless steel construction, and customing heights
Application scenarios
★Industrial storage tanks: manholes for maintenance of petroleum/chemical/food storage tanks, meeting the needs of liquid level measurement and internal cleaning
★Tank truck transportation: The top manhole of liquid tank trucks (oil/chemical products) ensures transportation safety and fast loading and unloading
★Shipbuilding industry: cargo oil tank/deck inspection port, achieving water tightness/oil tightness, suitable for marine environment
★Special equipment: emergency maintenance channels for environmental protection equipment and pressure vessels
Core selling points
◎Rapid opening and closing: Rotate the handle 90 ° to complete locking/unlocking, no tools required, single person operation in 3 seconds, greatly improving maintenance and loading and unloading efficiency
◎Safety protection: standard safety chain to prevent the hatch from falling after opening; Structural design avoids accidental opening under pressure and complies with hazardous chemical safety regulations
◎Reliable sealing: Circular rubber sealing ring+uniform clamping force, achieving water tightness/oil tightness/air tightness, preventing medium leakage and oil and gas evaporation
◎Durable adaptation: high-strength body+anti-corrosion coating, long service life; Standardized flange interface, can directly replace old manholes of various storage tanks/tankers/ships
◎Convenient maintenance: simple structure, easy replacement of seals, low long-term use cost
Why choose us
◆Compliant with national and international safety standards, passed sealing and pressure testing
◆Materials can be customized as needed to adapt to different media and environments
◆Mature technology, stable mass production, fast delivery time
◆Convenient after-sales service, vulnerable parts such as seals can be purchased and replaced separately
