Water & Wastewater Treatment Valves
Engineered valve solutions for Municipal Water Treatment Plants (WTP), Wastewater Treatment Plants (WWTP), industrial demineralization, and sewage pipelines. Conforming to IS, BS, and AWWA standards with high-durability Fusion Bonded Epoxy (FBE) coatings for maximum corrosion protection.
Water Sectors Served
High Quality Standards: Drinking-water safe elastomer seals (EPDM/NBR), AWWA C509/C515 resilient seated gates, and heavy-duty IS 14846 sluice valves for municipal utility networks.
Valves by Water Treatment Process Area
Recommended Metallurgy for Water Systems
Cast Iron (IS 210 FG 260)
Highly cost-effective with natural corrosion resistance. The classic choice for municipal raw water, low pressure sewage, and standard sluice gates.
- Temperature: up to 120°C
- Grade FG 200 / FG 260
- Complies with IS 14846 and BS 5163
Ductile Iron (GGG40 / GGG50)
Spheroidal graphite iron offering twice the tensile strength of cast iron. Preferred for high-pressure distribution mains and buried service.
- Temperature: -10°C to 120°C
- High elongation & impact resistance
- FBE coating compatible
Stainless Steel (CF8M / SS316)
Highest level of sanitary and chemical resistance. Used for demineralized water systems, industrial filtration membranes, and chemical feeding lines.
- Temperature: -196°C to 538°C
- Excellent chemical resistance
- Ideal for demineralized & RO water
Critical Valve Designs for Water Treatment
Resilient Seated Sluice
Designed to AWWA C509/C515 and BS 5163 standards. Encapsulated rubber wedge guarantees zero-leakage bubble-tight shutoff on municipal pipelines without sand-trapping pockets.
Knife Edge Gate Valves
The solid-cutter valve for wastewater and sludge. Sharp-edged stainless steel gate slices through fibrous materials, slurries, and heavy sludge in secondary treatment facilities.
Kinetic Air Release Valves
Crucial for pipeline safety. Automatically releases accumulated air pockets during operation and prevents water hammer or vacuum implosion during line drainage.
EPDM-Lined Butterfly
Wafer and lug concentric butterfly valves with replaceable/molded rubber liners. Extremely lightweight and ideal for rapid municipal isolation and pneumatic filtration beds.
Frequently Asked Questions
What are the main types of valves used in wastewater treatment plants (WWTP)?
Wastewater treatment plants utilize several specialized valve types, including: Knife Edge Gate Valves (for slicing through thick sludge, grit, and paper pulp), Plug Valves & Pinch Valves (for slurry isolation), Non-Slam Swing Check Valves (for preventing pump backflow), and Resilient Seated Gate or Butterfly Valves (for clean water discharge and secondary treatment lines).
What is the difference between cast iron and ductile iron valves in water service?
Cast iron (grey iron) valves are cost-effective and have good corrosion resistance but are brittle. Ductile iron valves incorporate spheroidal graphite, providing twice the tensile strength, superior impact resistance, and high pressure handling. Ductile iron is preferred for high-stress underground distribution mains and municipal pump stations.
When should a knife edge gate valve be used instead of a standard gate valve?
A standard wedge gate valve has internal pockets where solids, pulp, and sludge can accumulate, preventing tight shutoff. A Knife Edge Gate Valve features a thin, sharp-edged stainless steel gate that cuts directly through heavy slurries and viscous sludge, sliding against polyurethane or elastomer seats for a 100% leak-proof seal in solids-handling lines.
What coatings are applied to water treatment valves to prevent rust?
The industry standard for water treatment valves is Fusion Bonded Epoxy (FBE) coating. FBE is electrostatic powder applied at high temperatures, creating a smooth, non-porous, corrosion-resistant barrier (usually 250+ microns thick) both internally and externally. It prevents rust, resists abrasion from suspended solids, and is certified for drinking water safety (NSF 61).
Need Valves for Your Water Treatment Plant?
Send us your municipal/contract specs. We provide Fusion Bonded Epoxy (FBE) coated valves, sanitary EPDM/NBR seats, third-party certification support, and competitive municipal prices for filtration, sewage, and drinking water pipelines.