Describe
Suitable for use in areas prone to heavy rains or high tides and potential flooding
Blackflow Prevention Manhole – HG02
Measurement: Ø530*H1045(mm)
Material: PP-Block, PVC
Diameter: Ø168mm
Total weight: 29kg
Flow Capacity: 15 l/s
Stopper
Including door shaft and stop door
Cover
With external threaded and rotating arms for easy assembly
Chamber
There is 1 outlet, with an internal thread to fil the outer thread of the body on the manhole
Collection chamber
There is 1 outlet, with an internal thread to fit the outer thread of the body on the manhole
Blackflow Prevention Manhole – HG05
Measurement: Ø530*H1045(mm)
Material: PP-Block, PVC
Diameter: Ø168mm
Total weight: 29kg
Flow Capacity: 15 l/s
| Backflow Prevention Manhole – HG02 | Backflow Prevention Manhole – HG05 | |
| 1. Physical Parameter | ||
| Height | 1045 mm | 1000 mm |
| Outer diameter | 530 mm | 530 mm |
| Horizontal | 600 mm | 640 mm |
| Inside diameter | 435 mm | 450 mm |
| Wall thickness manhole body | 8 mm | 6 mm |
| Wall thickness manhole body | 215mm | =>0mm |
| Diameter of PVC inlet pipe joint | 114mm 140mm 168mm | 114mm 140mm 168mm |
| Diameter of PVC outlet pipe joint | 114 mm | 114mm 140mm 168mm |
| Occupied Volume | 0.30 m³ | 0.35 m³ |
| Total Weight | 29kg | 22kg |
| 2. Material | ||
| Material | PP-Block, PVC, ABS | PP-Block, PVC, ABS |
| Chemical Resistant | Can withstand acidic, alkaline solutions… | Can withstand acidic, alkaline solutions… |
| 3. Loading Capacity | ||
| Flow Capacity | 0.015 m3/s | 0.015 m3/s |
| Water Capacity | 0.145 m3 | 0.15 m3 |
| Heat Resistant | – 40oC to 100oC | – 40oC to 100oC |
| Tenile stress | 25 – 30 MPa | 25 – 30 MPa |
| Expansibility | 40 – 45% MPa | 40 – 45% MPa |
| Elasticity Module | 40 – 45 MPa | 40 – 45 MPa |
| Impact Durability | 70 – 75 mJ/mm | 70 – 75 mJ/mm |
| Load Capacity | 169 – 170 kN | 112 – 120 kN |
| Waterproof | No leakage | No leakage |
(Based on the basic standards of the Company issued on March 23, 2020)
| Criteria | Brick/Concrete Manhole | Brick/Concrete Manhole |
| Economic | – The construction have many steps that take a lot of time – Need to be replace in 10-15 year – Easy to get clogged | – Quick installation time – Lifespan of product up to 50 years – Prevent drainage blockage. |
| Technology | – The roughness of the pit of brick / concrete pit is large, requiring a slope to ensure flow velocity and no sedimentation – Manhole, joints, outlets are easily cracked causing leakage of sewage – Long installation due to many process | – The roughness of plastic manhole wall is almost none exsisting, limiting sediment and ensuring flow rate – Manhole are connected to plastic drain pipe, using specialized glue allowing no leakage – Fast construction time. |
| Maintenance operation | – Replacing require demolish and rebuild | – Easily performing maintenance routine checks and troubleshooting |
| Environmental Protection | – Environmental protection is not good, does not prevent odors – Easy to be eroded or corroded by sewage environment – Easy to leak wastewater – Inability to prevent reflux from the public drainage system into the house during high tide or heavy rain – No collection of solid waste, waste fat. | – Protect the environment well and prevent odors thoroughly – Manhole does not eroded or corroded by wastewater environment – No leakage of wastewater because its closed system |
When flood tide or rainwater has receded and no sign of backflow are visible, proceed to turn the hand wheel back in the opposite direction all the way and continue to use domestic water as usual. To prevent this form happening, simply attach the hand wheel to the door shaft and turn it a full circle counter clockwise closing the stopper
Household, Restaurant, Hotel, Office Building, Restaurant, Factory, Establishments producing and processing agricultural, forestry and aquatic products, Service operation establishments, Medical establishments, Schools
