AODD Diaphragm Pump Approved Equal Comparison
Graco Husky & ChemSafe vs. Finish Thompson FTI Air — air-operated double-diaphragm pumps compared on wetted material, connection type, and construction, for a contractor preparing an “or equal” substitution request. LibertyCES documents the comparison; the engineer of record decides.
30+ years spec experience. Send James your basis-of-design AODD pump and proposed alternate — get a real wetted-material match, not a catalog guess.
Request a Spec Review →AODD (air-operated double-diaphragm) pump specs often name one manufacturer's exact model because the "self-priming, dry-run-tolerant, no motor" pitch sounds identical across every AODD brand on paper. A real substitution request has to go past that shared category description into the fluid-section material (metal vs. non-metallic), the connection type, and the specific diaphragm/ball/seat elastomer options — this page walks through both real comparisons LibertyCES has the underlying vendor data for.
Graco Husky 716 vs. Finish Thompson FTI Air FT10
This is a genuine cross-construction comparison, not just a cross-brand one — Husky 716 is available in Aluminum or Stainless Steel; FTI Air's non-metallic line is Polypropylene or PVDF only. Both can be real equals for the right application, but the construction difference needs to be stated plainly in any substitution request.
| Requirement | Basis of Design — Graco Husky 716 | LibertyCES Alternate — FTI Air FT10 | Same / Different | Notes |
|---|---|---|---|---|
| Pump technology | Graco Husky 716 — air-operated double-diaphragm (AODD), 3/4in port, center and end porting | Finish Thompson FTI Air FT10 — air-operated double-diaphragm (AODD), 1in port, end porting, ANSI/DIN/ISO flange | Same | Both are true AODD pumps — same core mechanism (two diaphragms driven by compressed air, no motor or shaft seal), not a different pump technology dressed up as an equal. |
| Fluid section material | Aluminum or Stainless Steel (per Graco's own 716 ordering options) | Polypropylene or PVDF only — no metal fluid-section option in the FTI Air non-metallic line | Different | This is the real, disclosable difference on this page: Husky 716 is offered in metal construction, FTI Air's non-metallic line is plastic-only. For a chemical requiring a non-metallic wetted path, the FTI Air pump matches the intent; for an abrasive or high-pressure service calling for metal, the Husky metal option is the closer match. State which construction the basis-of-design spec actually requires before assuming either is a blanket equal. |
| Connection type | 3/4in NPT, center or end porting | 1in ANSI/DIN/ISO flange, end porting only (adjustable center porting doesn't appear until FTI Air's 3in FT30P model) | Different | Threaded NPT (Husky) vs. flanged (FTI Air 1in and larger) connections require different pipe-fitting hardware on installation — a real, practical difference to flag in a submittal even when the pump sizes are functionally comparable. |
| Diaphragm material options | Fluoroelastomer, Buna-N, Santoprene, PTFE Overmold, PTFE/EPDM 2-Piece, TPE (Hytrel) | Neoprene, Santoprene, FKM (Viton), EPDM, PTFE, Buna, Hytrel, Polyurethane | Overlapping, not identical | Both offer a wide diaphragm-material menu including PTFE, Santoprene, and a fluoroelastomer/FKM option — a real overlap. FTI Air's published list additionally includes Neoprene and Polyurethane, which are not named in Graco's 716 ordering options captured here. Confirm the specific diaphragm material against the process chemical's own compatibility rating regardless of which pump is proposed. |
| Ball / seat material | Ball: PTFE, Santoprene, Buna-N, TPE (Hytrel), 316 Stainless Steel, Urethane Duckbill. Seat: Stainless Steel, Acetal, Polypropylene, Urethane Duckbill | Ball: Neoprene, Buna, FKM, EPDM, Santoprene, PTFE. Seat: PP, PVDF | Different construction options | Husky 716's metal fluid-section option allows a 316 Stainless Steel ball and Stainless Steel seat — options that don't exist in FTI Air's non-metallic-only line by design. If the spec calls out a metal ball/seat by name, FTI Air's non-metallic line cannot match it; confirm which construction the basis of design actually requires. |
| Max air pressure | Not itemized at the 716 model level in this capture | 100 psi (6.9 bar) for FT10 | Unverified | Confirm Graco's current Husky 716 data sheet for a directly comparable air-pressure ceiling before claiming parity. |
| Certifications / conductive option | Not itemized in this capture at the 716 model level | FT025 (smallest size) offers a Conductive Polypropylene wetted option; not confirmed whether this carries to FT10 | Unverified | If the application needs static-dissipative/conductive plastic construction (common for flammable-solvent transfer), confirm the specific model's conductive option on both sides before assuming it is standard. |
Sources: Graco Husky 716 live ordering-options capture (graco.com) and Husky product/instruction manual (308981); Finish Thompson FTI Air non-metallic AODD product pages (ftiair.com) and FT10 manual/tech flyer.
Graco ChemSafe 515 vs. Finish Thompson FTI Air FT05
Both are non-metallic AODD pumps positioned for corrosive-chemical service, but ChemSafe's all-PTFE wetted path is a narrower, more chemically universal construction than FTI Air's mix-and-match PP/PVDF body.
| Requirement | Basis of Design — Graco ChemSafe 515 | LibertyCES Alternate — FTI Air FT05 | Same / Different | Notes |
|---|---|---|---|---|
| Pump technology | Graco ChemSafe 515/307/1040/1590 — AODD, PTFE-wetted, purpose-built for corrosive/abrasive chemicals | Finish Thompson FTI Air FT05/FT15Z (non-metallic) — AODD, PP/PVDF wetted, general chemical-transfer AODD line | Same core mechanism, different design intent | Both are non-metallic AODD pumps for corrosive service, but Graco's ChemSafe is a machined, no-exposed-metal design explicitly marketed for maximum chemical containment, while FTI Air's non-metallic line is molded PP/PVDF construction across a broader general-purpose size range. Confirm whether the spec calls for ChemSafe's specific machined-precision positioning or a general PP/PVDF AODD pump before treating the two product lines as interchangeable. |
| Wetted material | ChemSafe 515/307/1040: PTFE Seat, PTFE Ball, Overmolded PTFE Diaphragm, PTFE Fluid Path (all-PTFE wetted path) | FT05: Polypropylene, PVDF, or Conductive Polypropylene fluid section; diaphragm/ball/seat materials vary independently (Neoprene/Santoprene/FKM/EPDM/PTFE/Buna/Hytrel/Polyurethane diaphragms; PP/PVDF seats) | Different | ChemSafe's all-PTFE wetted path is a narrower, more chemically universal construction than FTI Air's mix-and-match PP/PVDF body with a separately selected diaphragm/ball material. All-PTFE construction generally has broader chemical compatibility than PP or PVDF, but confirm the actual process chemical against each material independently rather than assuming "both non-metallic" means equal resistance. |
| Max flow (comparable size) | Not itemized at the individual ChemSafe model level in this capture | FT05 (1/2in): 19 gpm (72 lpm) max flow | Unverified | Pull Graco's current ChemSafe 515 data sheet for a directly comparable flow figure at the same 1/2in port size before claiming a matched duty point. |
| Port connection | NPT Port (per Graco's own ChemSafe part-number descriptions) | NPT/BSP (FT05 and FT025); shifts to ANSI/DIN/ISO flange at FT10 (1in) and larger | Same at this size range | Both use threaded NPT connections at the smaller (1/2in and below) sizes captured here — a genuine match at this size range, unlike the flanged 1in-and-up comparison above. |
Sources: Graco ChemSafe product/part-number pages (graco.com); Finish Thompson FTI Air non-metallic AODD FT05 product page, manual, and tech flyer (ftiair.com).
AODD Diaphragm Pump Substitution FAQ
Is a metal AODD pump ever a genuine equal to a non-metallic (plastic) AODD pump?
Only if the substitution is disclosed as a construction change, not treated as automatic. Graco's Husky line offers Aluminum and Stainless Steel fluid-section options that don't exist in Finish Thompson's FTI Air non-metallic line by design — and conversely, FTI Air's Polypropylene/PVDF construction isn't available in Husky's metal configuration. A real substitution request states which wetted-path family the basis-of-design spec actually requires and matches the alternate to that same family, rather than assuming "AODD pump" alone makes any construction interchangeable.
Does matching diaphragm material automatically make two AODD pumps equal?
No — diaphragm material is one requirement among several, not the whole comparison. Graco Husky 716 and Finish Thompson FTI Air both offer PTFE and Santoprene diaphragm options, which is a real overlap, but the fluid-section body material, ball/seat construction, connection type (NPT vs. flanged), and air-pressure rating all need to be checked independently. Two pumps with the same diaphragm elastomer can still have meaningfully different wetted-path chemistry everywhere else in the pump.
Why does NPT vs. flanged connection matter in an AODD pump substitution?
It is a real, practical installation difference, not a paperwork detail. Graco's Husky 716 uses 3/4in NPT threaded connections; Finish Thompson's FTI Air line shifts from NPT/BSP threading at 1/2in and below to ANSI/DIN/ISO flanged connections starting at the 1in FT10 size. A contractor proposing a flanged alternate for a threaded basis-of-design pump (or vice versa) needs to account for different pipe-fitting hardware and installation labor, even if the pump's flow/pressure performance is a genuine match.
What is the real difference between Graco ChemSafe and Graco Husky for a corrosive-chemical substitution?
They are both Graco AODD pumps but built for different chemical-service intent, and a substitution request should name which one the basis of design actually specifies. ChemSafe is a machined, no-exposed-metal design with an all-PTFE wetted path option, explicitly marketed for maximum corrosion resistance in acids and other aggressive chemicals. Husky is Graco's broader general-purpose AODD line, offered in both metal and non-metallic (mix-and-match diaphragm/ball/seat) configurations. Substituting one Graco line for the other within the same brand still needs the same requirement-by-requirement check as a cross-brand substitution.
Does air consumption or self-priming behavior differ enough between AODD brands to matter in a substitution request?
It can, and it is worth confirming rather than assuming parity, because AODD pumps generally share the same "self-priming, dry-run-tolerant" reputation as a category even though individual models differ in air consumption at a given flow/pressure point and in exact dry-run duration limits. This comparison did not have directly matched air-consumption curves for the specific Graco and Finish Thompson models compared here — that is a real, stated gap (not a confirmed match) that should be verified against each vendor's current performance curve before a submittal claims equivalent air efficiency.
Preparing an AODD pump substitution request?
Send James the basis-of-design cut sheet and the manufacturer/model you want to propose — I’ll confirm the wetted-material and construction match against real, current factory data before it goes to the engineer of record.
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].