Knife Gate Valve — Food/Beverage/Biological Process Fluids
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Request a Spec Review →Named chemicals
What LibertyCES's vendor documentation shows
Moderate: AVCO names food & beverage and paper & pulp as 6100 industries and meets TAPPI TIS 405-8, but publishes no 3-A or FDA certification, so this belongs on utility/byproduct/solids duty rather than product-contact service. The chart adds the real caution: white liquor at 80°C drops 316SS to C and sulfite liquor holds it at G, so the Hastelloy body/shim option is not a luxury on hot pulping liquor lines. Sulfite liquor and white liquor are the two pulp-and-paper process fluids in the chart that had no family home before this one existed.
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
| 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.md |
| 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.md |
| 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 | flowline-chemical-compatibility.csv |
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
Is Knife Gate Valve compatible with Food/Beverage/Biological Process Fluids?
Moderate: AVCO names food & beverage and paper & pulp as 6100 industries and meets TAPPI TIS 405-8, but publishes no 3-A or FDA certification, so this belongs on utility/byproduct/solids duty rather than product-contact service. The chart adds the real caution: white liquor at 80°C drops 316SS to C and sulfite liquor holds it at G, so the Hastelloy body/shim option is not a luxury on hot pulping liquor lines. Sulfite liquor and white liquor are the two pulp-and-paper process fluids in the chart that had no family home before this one existed. This is moderate evidence.
What materials are documented for Knife Gate Valve 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. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm with a spec review before final specification.
What specific 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.
What products are cited for Knife Gate Valve in Food/Beverage/Biological Process Fluids service?
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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