Potable water networks, wastewater plants and pump stations run on a narrow band of certified, non-toxic, corrosion-resistant flow control — one grade wrong and the line fails a water-authority inspection. This solution consolidates SS and plastic valves, centrifugal and submersible pumps, PVC/PEX fittings and elastomer seals into one BOM, from raw water intake to treated discharge.
Each requirement below drives a specific material, design or documentation choice — miss any and the item fails inspection, or fails in service.
Anything in contact with drinking water needs NSF/ANSI 61 (US) or WRAS (UK) certified materials — brass dezincification-resistant grades or SS304/316, with elastomers rated for low toxicity. Specifying a catalog-grade valve without the certificate is the single most common reason a municipal bid gets rejected at submittal.
NSF/ANSI 61 · WRASTransmission mains and plant piping run DN200–DN1200 at PN10–PN16 — a different design problem from small-bore high-pressure process valves. Gate and butterfly valves dominate because they give full flow at low head loss; actuation and gearbox sizing become the main engineering variable at this bore range.
DN200–1200 · PN10–16Chlorine residual, dissolved solids and seasonal raw-water chemistry attack unlined ductile iron and plain carbon steel over years, not days. Fusion-bonded epoxy lining on ductile iron valves and SS316 on membrane/RO trains are the standard upgrades once a water authority has seen a failure.
Epoxy-lined DI · SS316Intake and lift pumps run 24/7 with no process shutdown window — a failed pump is an overflow event, not a line stoppage. Submersible pumps need IP68 sealing and cable gland integrity; surface centrifugal sets are typically specified in duty/standby pairs with auto-changeover.
IP68 · Duty/StandbyFeed the working condition into the selector below and the bundle in the next section is what a compliant spec resolves to.
Epoxy-lined ductile-iron gate valves are the AWWA default for transmission mains — full bore, low head loss, proven at DN200+ and a fraction of the cost of SS at that bore size.
PVC/CPVC ball valves handle chemical dosing (sodium hypochlorite, alum, polymer) where metal bodies corrode within a season; small bore keeps material cost low at this duty.
SS316 swing check valves protect pump discharge from backflow and water hammer when a lift station pump trips or changes over to standby.
Centrifugal and submersible pumps in SS304/316 wetted parts carry the continuous-duty load; duty/standby pairing and IP68 sealing are specified, not assumed.
| Parameter | Typical range | What we select | Driver |
|---|---|---|---|
| Pressure class | PN10 – PN25 | PN16 transmission default | AWWA / EN 1092 design pressure |
| Body material | DI / PVC / SS316 | Epoxy-lined ductile iron large bore; SS316 dosing/RO | Bore size & media corrosivity |
| Elastomer / seat | EPDM, NBR, PTFE | NSF/WRAS-rated EPDM potable contact | Potable-contact requirement |
| Actuation | Manual / gearbox / electric | Gearbox above DN300 | Torque at large bore |
| End connection | Flanged / socket / threaded | Flanged transmission; socket PVC dosing | Bore size & material |
| Material cert | 3.1 / mill cert | EN 10204 3.1 standard; 3.2 on request | Water-authority submittal |
The six line items below are what a typical package resolves to. Request the bundle as one RFQ — we quote, consolidate and ship under a single bill of lading, with documentation matched across all items.
| Line | Item | SKU | Key spec | Material | |
|---|---|---|---|---|---|
| 01 | Epoxy-Lined Ductile Iron Gate Valve — transmission main isolation | PF-GV-DI-DN200 | DN150–DN1200, PN10–PN16, AWWA C509 | Ductile iron / FBE lining | Details → |
| 02 | PVC Ball Valve — chemical dosing line isolation | PF-BV-PVC-DN25 | DN15–DN50, PN16, socket/threaded | PVC / CPVC | Details → |
| 03 | SS316 Swing Check Valve — pump discharge backflow prevention | PF-CV-316-DN100 | DN50–DN300, PN16, flanged | SS316 | Details → |
| 04 | SS Centrifugal Pump — raw/treated water transfer | PF-CP-SS-DN80 | flow 25 m³/h, head 35 m, duty/standby | SS304 / SS316 wetted | Details → |
| 05 | Submersible Sewage Pump — lift station intake | PF-SP-CI-4 | flow 15 m³/h, head 18 m, IP68 | Cast iron / SS shaft | Details → |
| 06 | PVC/PEX Fitting & Gasket Set — treated-water pipework seal | PF-FT-PVC-50 | DN20–DN300, NSF-rated gasket | PVC / EPDM | Details → |
Each item ships with the certification its destination and standard demand. See the full material selection guide for body/seat alloy detail across all categories.
| Standard | Scope | Where it applies in this bundle |
|---|---|---|
| NSF/ANSI 61 | Drinking-water contact material safety (North America) | Potable-contact valves, fittings & elastomers |
| WRAS | UK drinking-water material & mechanical approval | Potable-contact items destined for UK/Commonwealth markets |
| AWWA C509 | Resilient-seated gate valves for water/wastewater | Ductile-iron transmission gate valves |
| AWWA C515 | Resilient-seated gate valves, alternative design | Large-bore transmission isolation (line 01 variant) |
| ISO 9001 | Quality management system | All partner factories across the bundle |
| EN 10204 3.1 | Mill material certificate | Standard submittal; 3.2 on request for EPC-scale projects |
A municipal utility expanding a treatment plant needed SS ball valves, centrifugal pumps and PVC fittings sourced, certified and consolidated against a fixed commissioning date.
Scope: epoxy-lined ductile-iron gate valves for new transmission branches, SS316 ball valves for the chemical dosing skid, SS centrifugal transfer pumps in duty/standby pairs, and PVC fittings carrying NSF/ANSI 61 certification for the potable-contact sections.
All items were consolidated into two containers against the plant's civil-works schedule; NSF and mill certificates were supplied ahead of delivery so the utility's QA team could clear incoming inspection without delay.
2 consolidated containers · NSF/ANSI 61 · one B/L
The same checks our engineers run before quoting a package for this duty.
One RFQ covers every item in this solution. We select, price and consolidate the bundle, and reply within 12h in EN / RU / ES / AR.