Butterfly Valve for Municipal Wastewater
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →Yes. LibertyCES has documented Butterfly Valve in Municipal Wastewater applications, including Asahi Type-57 LIS and Type-55 IS. The right model depends on the fluid, concentration, temperature, flow and duty cycle, so send James your process data for a free spec review before final selection.
Notes from the vendor documentation
Wastewater treatment and CSO treatment explicitly named applications.
Products cited in this application
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Type-57 LIS pressure/temp | 150 psi @ 70°F, Class 6 bubble-tight shutoff, ISO 5752 short pattern | Asahi/America — Thermoplastic Valves: Direct Replacement for Metal Valves |
| Type-55 IS pressure by size | 150 psi (-5°F to 210°F) for 2"-12"; derated to 100 psi for 14"/16" | Asahi/America — Thermoplastic Valves: Direct Replacement for Metal Valves |
| Type-55 IS body | Powdercoat ductile cast iron (FCD-S) — only metal-bodied valve in the metal-replacement family, PTFE disc/seat wetted | Asahi/America — Thermoplastic Valves: Direct Replacement for Metal Valves |
| Warranty | 3-year warranty across all 5 metal-replacement valve families | Asahi/America — Thermoplastic Valves: Direct Replacement for Metal Valves |
The 14"/16" Type-55 IS is derated to 100 psi from the 150 psi rating that applies at 2"-12" — quoting the smaller size's pressure rating against a 14"/16" wastewater line is a real oversizing/undersizing trap in this family.
CSO and WWTP wastewater lines are exactly where Asahi's own named chemistries — acidic waste, oxidizers, caustics — go to work on a metal butterfly valve's wetted surfaces; the Type-57 LIS's non-wetted 316SS stem and full-seat isolation exist specifically so the metal never touches the media in the first place.
Every claim on this page traces to real, vendor-published documentation on file with LibertyCES. Confirm current specifications with the manufacturer before final specification.
Related Guides
FAQ
How is Butterfly Valve used in Municipal Wastewater?
Wastewater treatment and CSO treatment explicitly named applications.
Which Butterfly Valve models are specified for Municipal Wastewater?
Documented models include Asahi Type-57 LIS, Type-55 IS. Confirm current specifications with the manufacturer before final selection.
What does LibertyCES need to size Butterfly Valve for a Municipal Wastewater application?
The fluid and its concentration, operating temperature, flow or volume, pressure and suction conditions, duty cycle, and the existing equipment it replaces or connects to. James reviews it for free.
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].
Send James your spec
Fluid, concentration, temperature, flow or volume, and where it goes. James replies with a real answer, not a catalog page.
Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated