Elliptical flange quick opening manhole with damper 300 * 400

NegotiableUpdate on 01/05

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Nature of the Manufacturer: Producers

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Place of Origin

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Overview

The elliptical flange quick opening manhole with damper 300 * 400 is a special manhole (maintenance hole) used for pressure vessels, storage tanks, reaction vessels or pipeline systems. Its core feature is equipped with a damping device to buffer the impact force during the opening and closing process, ensure smooth and safe operation, and reduce equipment wear.

Product Details

Elliptical flange quick opening manhole with damper 300 * 400introduction

1. Basic Concepts

Elliptical flange quick opening manhole with damper 300 * 400It is a special manhole (maintenance hole) used for pressure vessels, storage tanks, reaction vessels or pipeline systems. Its core feature is equipped with damping devices to buffer the impact force during the opening and closing process, ensure smooth and safe operation, and reduce equipment wear.

2. Main structural components

A typical damper manhole includes the following key components:

Manhole cover: used to seal the maintenance port, usingstainless steel material.

Damping mechanism:Buffer opening and closing impact.

Sealing system: food grade silicone/Fluororubber gasket (corrosion-resistant, high-temperature resistant)，PTFE(Teflon) seal (used in strong acid and alkali environments).

hinge/Locking mechanism: Ensure that the manhole can be opened and closed smoothly and securely locked.

3. Core functions and advantages

function	advantage
Buffer opening and closing impact	Prevent the manhole cover from suddenly popping open or falling off, protecting the safety of operators
Smooth operation	Reduce mechanical vibration and extend equipment lifespan
Reliable sealing	Prevent medium leakage (especially suitable for toxic and corrosive environments)
Adapt to harsh working conditions	Resistant to high pressure, high temperature, and corrosive media (such as chemical, food, and pharmaceutical industries)

4. Typical application scenarios

Chemical storage tank: maintenance port for strong acid, strong alkali or organic solvent containers.

food/Pharmaceutical equipment: requires sterile and corrosion-resistant buffer manholes (such as fermentation tanks, reaction vessels).

petroleum/Natural Gas Pipeline: Manhole Buffer Design in High Pressure Environments.

Sewage treatment system: corrosion-resistant and impact resistant maintenance inlet.

5. Key parameters for selection

Pressure rating: normal pressure, low pressure（0.1~1MPa）High voltage（>1MPa）.

Temperature range:-50°C ~ 300°C(depending on the sealing material and damper type).

Medium compatibility: The sealing gasket material needs to match the medium (such asPTFEResistant to concentrated acid,EPDMAlkali resistant).

Size standard:DN400~DN600(Common manhole diameter), customizable.

6. Maintenance and Precautions

Regular inspection of dampers: hydraulic/Is the gas spring leaking oil/leak.

Sealing gasket replacement: If aging or cracking occurs, it should be replaced in a timely manner (especially in highly corrosive environments).

Avoid overloading operation: Heavy manholes should be opened and closed according to regulations to prevent damper failure.