Rainwater harvesting technical requirements
| Serial number | project | Technical requirements |
| 1 | Safety diversion well grille | Stainless steel mesh Material: sus304 Aperture: φ20 Mesh wire diameter: φ2 |
| 2 | All-in-one multifunctional device | Function: Five-stage filtration, automatic non-powered backwashing, no-cleaning flow rate ≥ 0.004m Filtration accuracy: 15μm Material: SUS304 Specifications: Length * width * height = 800mm * 800mm * 2000mm |
| 3 | Abandoned flow pump | Function: automatic mixing, cutting, sewage discharge Material: ductile iron Model: 50JYWQ10-10-0.75 Parameters: flow rate 10m³/h, head 10m, motor power 0.75KW Pump cable length 20m |
| 4 | Water supply pump | Function: automatic mixing, cutting, sewage discharge Material: ductile iron Model: QSP20-40/2-4 Parameters: flow rate 20m³/h, head 40m, motor power 4KW Pump cable length 20m |
| 5 | Stainless steel bracket | Material: sus304 Specification: length * width * height = 800mm * 800mm * 2000mm Square tube specification: 40 * 40mm Square tube wall thickness: 1.5㎜ |
| 6 | Dosage dispenser | Material: PE plastic Storage capacity: ≥2.5KG Function: Unpowered automatic dosing Agent: Sodium hypochlorite disinfection tablets |
| 7 | Check valve | Material: Cast iron Diameter: DN50 Type: Ball check valve |
| 8 | Lightweight cast iron manhole cover | Specifications: Ø700mm and 1000*500mm with anti-fall net |
| 9 | Butterfly valve | Material: Cast iron Diameter: DN50 Type: Wafer type |
| 10 | Backflow preventer | Material: cast iron Diameter: DN50 Type: flange connection |
| 11 | Remote pressure gauge | Full scale: 0~1.0MPa Analog: 0~10V 4~20mA |
| 12 | Brick valve well | C15 concrete cushion, 1:2 cement mortar for internal and external painting |
| 13 | Control cabinet | Model: Double-door outdoor PK-4/2-0.75/2S Control mode: automatic, manual, time control Control configuration: domestic inverter, Delixi electric, variable frequency constant pressure control Substrate function: automatic and manual, time control, liquid level digital display and control Box material: sus304 Grounding: L50*2500 angle steel buried, buried depth 2500mm |
| 14 | Modules | Size: 400*400*250㎜ Strength: Compression ≥45T/㎡, lateral pressure ≥45T/㎡ Lightweight PP module Connection method: Plug-in and slot overall connection Test report: A compressive strength test report issued by the National Construction Quality Supervision and Inspection Center must be provided |
| 15 | Composite geomembrane | Model: 200g/0.5/200g Structure: two cloths and one film Film material: new white PE film |
| 16 | Wood board | Thickness: 12㎜Specification: 2.44*1.22mmAnti-corrosion: Surface coated with epoxy resinAppearance: Smooth and flat, without burrs or cracks |
| 17 | Concrete | Pumping or self-mixing grade: C25 Prepare test pieces and send them for inspection with factory certificate and corresponding test report |
| 18 | Rebar | Model: HRB335 φ12@250 (double-layer bidirectional arrangement) with factory certificate and corresponding on-site inspection report |
