Water Treatment Valves & Piping Accessories
One-Stop Supply of Metal & UPVC Materials
Syneraqua provides a full range of valves and piping accessories for water treatment projects, covering both metal (stainless steel, carbon steel, cast iron) and UPVC plastic material systems — meeting the corrosion resistance, pressure and temperature requirements of municipal water supply, industrial wastewater, drinking water treatment, and seawater desalination applications.
Products are manufactured strictly to GB (Chinese), ANSI/ASTM (American), DIN (German), and JIS (Japanese) standards, covering DN15–DN1200 full size range, with flanged, threaded, socket, and solvent-weld connection options. Our engineering team provides professional support in material selection, size calculation, and pressure rating matching.
Product Categories
Four major categories covering valves, pipes, fittings and accessories — dual metal and UPVC material systems for all water treatment applications
Valves
Covering the full range of valve requirements for water treatment systems, offering both metal and UPVC valve series for different pressure ratings and corrosive environments.
- Gate Valves — Full bore, low flow resistance, ideal for isolation service. Metal: DN50–DN1200, UPVC: DN15–DN300
- Butterfly Valves — Compact and lightweight, ideal for large-diameter regulation and isolation. Wafer/flanged types, PN6–PN16
- Ball Valves — Quick opening with excellent sealing, ideal for frequent operation. Available in stainless steel / UPVC
- Check Valves — Prevent backflow and protect equipment. Swing / lift / wafer types available
- Control Valves — Paired with actuators for automatic flow/pressure regulation, suitable for dosing systems and backwash control
Pipes
Multiple material options to meet different water quality, pressure, temperature and corrosion requirements, covering DN15–DN1200.
- UPVC Pipes — Acid and alkali resistant, lightweight and easy to install, suitable for dosing systems, acid/alkali lines, and water reuse. DN15–DN400, PN10–PN16
- Stainless Steel Pipes — 304/316L, corrosion resistant and high strength, for drinking water, pure water, and desalination. DN15–DN600, sanitary/industrial grade
- Carbon Steel Pipes — Preferred for large-diameter high-pressure applications, epoxy/rubber lined for corrosion protection, for municipal sewage mains. DN50–DN1200
- PE Pipes — Flexible and impact resistant, heat-fusion joined with zero leakage, for outdoor buried water supply/drainage. DN32–DN1000
Fittings
A complete fitting series matching our pipes, ensuring full coverage of connection, directional change, branching, and reduction needs.
- Elbows — 45°/90°/180° angles, long/short radius options. UPVC solvent-weld, stainless steel welded, carbon steel flanged
- Tees/Crosses — Equal/reducing specifications, for flow distribution and convergence. Socket/flanged/welded connections
- Reducers — Concentric/eccentric types, for transitioning between different pipe sizes
- Flanges — Slip-on/weld-neck/blind flanges, GB/ANSI/DIN/JIS multi-standard. Stainless steel/carbon steel/UPVC available
- Caps — End-of-line sealing, same material as pipe, reliable sealing
Accessories
Ancillary components for piping systems, ensuring connection sealing, system stability, and maintenance convenience.
- Seals — EPDM/NBR/PTFE/Viton gaskets and O-rings, for different media and temperature conditions
- Fasteners — Stainless steel 304/316 bolts and nuts, corrosion and rust resistant, compliant with GB/T 5782, ANSI B18.2.1
- Pipe Filters — Y-type/T-type strainers, protecting valves and equipment from pipeline debris. DN15–DN500
- Pipe Supports/Clamps — U-bolts, sliding supports, fixed supports, UPVC/stainless steel, for various pipe diameters
- Instrument Fittings — Pressure gauge connectors, flow meter fittings, sampling valves, for easy online monitoring equipment installation
Application Areas
Our valves and piping accessories are widely used in municipal, industrial, drinking water, membrane treatment, chemical, and seawater desalination fields
Municipal Water Supply & Drainage
Valves and piping systems for city water supply, sewage treatment plants, and pipeline networks.
- Large-diameter water transmission pipelines
- Pump station valve groups
- Sewage collection networks
- On-site process piping
- Pressure-rated and reliable, long service life
- Large-diameter supply capability
- Compliant with municipal engineering standards
Industrial Wastewater Treatment
Corrosion-resistant piping systems for chemical, electroplating, textile, and pharmaceutical industries.
- Acid/alkali dosing lines
- Corrosive media transport
- Sludge transport pipelines
- Backwash piping systems
- UPVC acid/alkali corrosion resistance
- 316L stainless steel for high-temperature strong corrosion
- Reliable sealing, zero leakage
Drinking Water Treatment
Sanitary-grade piping for water treatment plants, purification stations, and direct drinking water systems.
- Raw water transmission pipelines
- Filtration system piping
- Clean water distribution networks
- Dosing and disinfection piping
- 304/316L sanitary-grade stainless steel
- Compliant with drinking water health standards
- No secondary contamination
Membrane Treatment Systems
Piping and valve packages for RO, ultrafiltration, and nanofiltration systems.
- High-pressure feed piping
- Concentrate discharge piping
- Cleaning system piping
- Control valve groups
- High-pressure rated PN25+
- UPVC corrosion resistance and lightweight
- Precise flow regulation
Chemical Piping Systems
Process piping, cooling water systems, and chemical transport for chemical plants.
- Chemical transport piping
- Cooling water circulation piping
- Steam/hot water piping
- Emergency discharge systems
- Temperature and pressure dual protection
- Multi-material compatibility for different media
- Safe, reliable, leak-proof
Seawater Desalination
Highly corrosion-resistant piping for seawater intake, pretreatment, and SWRO systems.
- Seawater intake piping
- Pretreatment filtration piping
- SWRO high-pressure piping
- Permeate transport piping
- 316L/duplex steel seawater corrosion resistance
- UPVC lightweight in low-pressure sections
- Safe and reliable in high-pressure sections
Our Advantages
Dual-Material One-Stop Supply
Metal (stainless steel/carbon steel/cast iron) and UPVC plastic — two full material systems, eliminating the compatibility risks of working with multiple suppliers. Different sections of the same project can use different materials, all from a single source.
- Metal: 304/316L stainless steel, WCB carbon steel, ductile iron
- UPVC: DN15–DN400 full size range, PN10–PN16
- Mixed-material transition fittings for seamless metal-to-UPVC connections
Multi-Standard Compliance
Products manufactured strictly to GB (Chinese), ANSI/ASTM (American), DIN (German), and JIS (Japanese) standards, meeting technical specifications for both domestic and international projects.
- GB/T 12232-2005 (gate valves), GB/T 12238-2008 (butterfly valves)
- ANSI B16.5 (flanges), ASTM A182 (stainless steel flanges)
- DIN 3202 (valve face-to-face dimensions), DIN 2501 (flange dimensions)
- UPVC fittings compliant with ISO 15493
Engineering Selection Support
We don't just sell products — we provide professional selection recommendations based on actual project conditions, including material selection, size calculation, pressure rating matching, and connection method determination.
- Optimal material recommendation based on media corrosiveness (UPVC/304/316L/duplex steel)
- Economical pipe diameter calculation based on flow rate and velocity
- Valve pressure rating determination based on system pressure (PN6–PN25)
- Pipeline layout recommendations and support spacing calculations
Quality Assurance
Every batch undergoes pressure testing, dimensional inspection, and visual examination before delivery, ensuring compliance with standard requirements. Material certificates and test reports provided.
- Shell pressure test at 1.5× nominal pressure, hold-tested
- Seal test at 1.1× nominal pressure, leak-tested
- PMI spectroscopic analysis report for stainless steel materials
- NSF certification for UPVC pipes in drinking water projects
Full-Process Service Commitment
From selection to delivery to after-sales, we provide full-process service guarantee for worry-free procurement.
- Free Selection Consulting — Material selection and size calculation technical support
- Custom Manufacturing — Non-standard fittings and special materials can be custom-made
- Unconditional Return/Exchange for Quality Issues — Quality problems confirmed and resolved immediately
- Lifetime Free Technical Consulting — Piping system modification recommendations anytime
Send your flow rate and influent & effluent water quality parameters. Our experts will design a tailored, efficient and reliable solution for your project.
