Seawater Desalination
Modern seawater desalination plants rely on thousands of valves to manage high-pressure reverse osmosis, intake screening, brine discharge, and chemical dosing. ZNX supplies a full range of butterfly, gate and check valves plus pipeline strainers — with super-duplex and SS316L options for chloride-rich service — to keep desalination running 24/7.
- High-pressure butterfly valves for RO trains (PN25 / ANSI 300)
- Super-duplex strainers protecting RO membranes and brine lines
- Dual-plate wafer check valves to prevent reverse flow on pump trip
- EPDM-seated resilient gate valves for treated water distribution
Wastewater & Sewage Treatment
From primary sedimentation to tertiary disinfection, ZNX valves handle abrasive sludge, corrosive chemicals and intermittent flow with ease. Our full epoxy-coated ductile iron bodies and SS316 internals withstand the harshest municipal and industrial sewage environments.
- Resilient seated gate valves for sludge and scum lines
- EPDM/ NBR seated butterfly valves for aeration basin isolation
- Swing check valves on pump discharge to stop water hammer
- Y-strainers protecting chemical dosing pumps and injection lines
Building Construction & HVAC
High-rise residential, commercial complexes, hospitals, airports and shopping malls depend on reliable valves for plumbing, fire protection, and HVAC. ZNX offers compact, low-torque butterfly valves and small Y-strainers designed for installation in tight ceiling and mechanical-room spaces.
- Wafer butterfly valves for chilled-water and condenser-water loops
- UL/FM gate valves for fire protection and sprinkler systems
- Threaded Y-strainers for plumbing risers and branch lines
- Stainless steel sanitary strainers for hospitals and food service
Oil & Gas / Petrochemical
From upstream wellhead manifolds to downstream refineries and LNG terminals, our API 600 gate and check valves, and pipeline strainers, deliver bubble-tight shutoff, fire-safe performance, and full compliance with ASME B16.34 and NACE MR0175 for sour service.
- API 600 gate valves in WCB / LCB / SS for crude and product lines
- Y-type pipeline strainers protecting pumps, compressors and meters
- API 594 dual-plate check valves for compressor and pump protection
- NACE MR0175 compliant materials for H2S / sour service
Municipal Water Supply
Water utilities and pipeline contractors trust ZNX ductile iron gate and butterfly valves for potable water distribution. All wetted parts comply with NSF/ANSI 61 and are coated with fusion-bonded epoxy for a 50-year service life underground.
- AWWA C509 / C515 resilient seated gate valves, DN50–DN600
- AWWA C504 butterfly valves, DN50–DN1200
- Fusion-bonded epoxy coating inside and outside (NSF61 available)
- Socket / flange / mechanical-joint end connections
Power Generation & Cooling
Thermal, nuclear and combined-cycle power plants require valves that handle high temperatures, high pressures and continuous duty. ZNX metal-seated gate valves and heavy-duty strainers are proven in boiler feedwater, cooling water circulation, ash handling and FGD systems.
- High-pressure gate valves for boiler feedwater and steam
- Butterfly valves for cooling-water intake and outfall
- Basket strainers for ash slurry and abrasive media
- Pneumatic and electric actuated packages for plant automation