This six-claw quick-open manhole cover is a specialized maintenance and material-handling component designed for tank trucks, material storage tanks,
This six-claw quick-open manhole cover is a specialized maintenance and material-handling component designed for
tank trucks, material storage tanks, and chemical storage and transportation tank vessels. The entire unit is integrally formed
from stainless steel, offering advantages such as corrosion resistance, ease of cleaning, and high-strength sealing. It is
widely compatible with various atmospheric/low-pressure tank vessels—including edible oil tanks, chemical liquid tanks,
food transport tanks, and hazardous chemical storage and transportation tanks—making it a critical supporting component
for tank manhole maintenance, material loading and unloading, and internal cleaning operations. It is also suitable for
crystallization media, powdered materials, and light petroleum fuels such as gasoline, diesel, and kerosene.
Core Features: Characteristics of the Emergency Pressure Relief Device
Secondary activation protection design
When the handle is activated sequentially, the sealing interface of the large cover gradually releases internal pressure, thereby
effectively ensuring the safety of the operator.
Nominal Diameter ：20 Inches
Emergency Pressure Activation： 0.2mpa
Maximum Discharge Rate： 7500 M³/H At 34 Kpa
Material Quality ：Stainless Steel
Way To Install： Welding Of The Circumferential Joint At The Top Of The Tank
Operating Temperature Range ：-40℃~+180℃
The brushed finish on stainless steel combines aesthetic appeal with durability.
2. Six-tooth fast-release locking mechanism: Multiple sets of eccentric locking claws uniformly clamp the sealing surface, ensuring easy operation during opening and closing, as well as stable sealing performance under pressure.
3. Equipped with PTFE seals, this component features high-temperature and high-pressure resistance, as well as explosion-proof capabilities.
4. The rotating shaft is equipped with an opening angle limiting device,which effectively prevents collision with the tank body during opening.
