Knife Gate Valve — Food/Beverage/Biological Process Fluids
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LibertyCES has documented Knife Gate Valve in Food/Beverage/Biological Process Fluids service, including sulfite liquor 6%, white liquor and beet sugar liquors. Wetted materials to confirm: Flowline chart. Documented models include AVCO 6100 Series Knife Gate Valve. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Materials documented for this service
- 304SS, 316SS, Hastelloy body and shim
- EPDM, Buna, Neoprene, Viton or Metal seats
- Flowline chart: 316SS rates G on sulfite liquor 6% at both 40°C and 80°C, and drops to C on white liquor at 80°C — pulp/paper process liquors are harder on stainless than they look
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| AVCO 6100 Series size & materials | 2"-24", ANSI Class 150, 304SS/316SS/Hastelloy body and shim, EPDM/Buna/Neoprene/Viton or Metal seats, meets MSS-SP-81 and TAPPI TIS 405-8 | AVCO Valve — Mining segment page |
| AVCO 6100 Series gate design | Gates polished/lapped on both sides with a machined bevel on the bottom edge specifically to cut through solids and provide a tighter seal when closed | AVCO Valve — Mining segment page |
| Flowline chart — 316SS on pulp liquors | 316SS rates G on sulfite liquor 6% at both 40°C and 80°C, and drops to C on white liquor at 80°C — pulp/paper process liquors are harder on stainless than they look | Manufacturer documentation on file |
AVCO publishes no 3-A or FDA certification on the 6100 Series despite naming food & beverage as a target industry — position it for utility/byproduct/solids duty rather than direct product-contact service unless the specific configuration is confirmed with the vendor.
White liquor dropping 316SS to a C rating at 80°C is the real caution here — pulp/paper process liquors look mild but aren't, which is why the Hastelloy body/shim option on the 6100 Series is not a luxury upsell on hot pulping-liquor lines, it's the difference between a valve rated for the service and one that only looks rated for it.
Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.
FAQ
Can Knife Gate Valve handle Food/Beverage/Biological Process Fluids?
LibertyCES has documented Knife Gate Valve in Food/Beverage/Biological Process Fluids service.
What wetted materials should Knife Gate Valve use in Food/Beverage/Biological Process Fluids service?
Materials documented for this service: 304SS, 316SS, Hastelloy body and shim, EPDM, Buna, Neoprene, Viton or Metal seats, Flowline chart: 316SS rates G on sulfite liquor 6% at both 40°C and 80°C, and drops to C on white liquor at 80°C — pulp/paper process liquors are harder on stainless than they look. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Food/Beverage/Biological Process Fluids chemicals does this cover?
Named chemicals in this documentation: sulfite liquor 6%, white liquor, beet sugar liquors, starch slurry, food-processing solids streams.
Which Knife Gate Valve models are documented for Food/Beverage/Biological Process Fluids?
Documented examples include AVCO 6100 Series Knife Gate Valve (2"-24", ANSI Class 150, 304SS/316SS/Hastelloy body and shim, EPDM or Metal seats most common, MSS-SP-81 and TAPPI TIS 405-8).
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated