Pressure Manhole Cover With Sight Glass(Manway)
KINGMAN Pressure Manhole Cover With Sight Glass is a pressure-bearing hygienic access opening for tank vessels, fabricated from high-grade stainless steel. It is equipped with a built-in tempered sight glass window, allowing operators to directly view tank internal conditions without opening the manhole cover. The multi-handwheel bolt clamping design delivers uniform compression and reliable sealing under working pressure. The mirror-polished surface and dead-zone-free interior fully satisfy CIP/SIP cleaning requirements. Widely used on pressure vessels and storage tanks in food, beverage, biopharmaceutical and fine chemical industries for tank inspection, sampling and real-time internal observation.
Specifications
| Parameter | Value |
|---|---|
| Product Type | Sanitary Manhole Cover |
| Size Range | 200mm–800mm |
| Material | 304 / 316L stainless steel |
| Seal Material | EPDM / FKM (Viton) / Silicon / NBR |
| Surface | Inner surface: Ra ≤0.5μm , Outer surface:Ra ≤0.8μm Pressure rating 0 ~ 6 bar available Shape type Round, Square and Elliptical available |
| OEM | any special OEM services |
| Certification | ISO 9001, 3A,CE,EAC,health wading license |
Dimensions
| Size | OD | H | t | t1 | Sight glass |
|---|---|---|---|---|---|
| 200 | 206 | 100 | 3 | 2.5 | DN50 |
| 300 | 306 | 100 | 3 | 2.5 | DN65 |
| 350 | 356 | 100 | 3 | 2.5 | DN80 |
| 400 | 406 | 100 | 3 | 2.5 | DN80 |
| 430 | 436 | 100 | 3 | 3 | DN80 |
| 450 | 456 | 100 | 3 | 3 | DN80 |
| 500 | 506 | 100 | 3 | 3 | DN100 |
| 600 | 606 | 100 | 3 | 3 | DN100 |
Features
- 1. Equipped with high-strength tempered glass sight window featuring excellent light transmission, pressure resistance, temperature resistance and impact resistance. It allows real-time clear observation of internal material flow, liquid level, foam and impurities without opening the cover or shutting down production.
- 2. Adopts multiple handwheel bolt compression structure with uniform force distribution and stable sealing pressure, which can withstand long-term rated tank working pressure and effectively prevent leakage, pressure relief and medium overflow.
- 3. Mirror-polished stainless steel body with smooth dead-zone-free inner cavity avoids material retention, accumulation and bacterial growth, maintaining long-term high-level tank hygiene.
- 4. User-friendly quick-opening structure ensures flexible and labor-saving operation, facilitating tank inspection, cleaning, sampling and internal equipment maintenance.
- 5. Fully compatible with CIP online cleaning and SIP high-temperature steam sterilization, resisting repeated flushing and temperature alternation to ensure stable hygienic performance.
- 6. Robust and corrosion-resistant structure with strong pressure impact resistance and deformation resistance, suitable for rigorous pressurized production environments with long service life.
- 工作原理 Working Principle
Working Principle
Pressure Manhole Cover With Sight Glass forms a high-strength sealed structure by evenly compressing the sanitary gasket between the cover and flange through multiple handwheel bolts. It effectively offsets internal medium pressure and fluid impact to achieve zero-leakage sealing under pressurized working conditions. The built-in tempered glass sight window provides stable pressure resistance and clear light transmission, enabling continuous visual monitoring of internal material status, liquid level and cleanliness during tank operation. When maintenance or cleaning is required, the handwheels can be loosened evenly to open the cover quickly and reset after operation, ensuring safe and stable continuous operation of pressure vessels.
Why Choose KINGMAN
Tank Drawing Review
Send tank opening dimensions, pressure requirements and installation drawings before ordering so the manway specification can be checked against the actual vessel.
Pressure Verification Before Shipment
Pressure-bearing sanitary components are checked through pressure and sealing tests before release, reducing risk before the manway reaches your project site.
Warranty and Technical Support
Export orders include a 1-year international warranty plus lifetime technical support for follow-up, replacement parts and qualifying warranty cases.
