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Technical Equipment

Pump Chemical Compatibility
Table

Query 1,000+ chemicals with A/B/C/D resistance values for PP, PVDF, aluminum, SS316, PTFE and elastomers instantly.

  • 1,000+ Chemicals
  • 26 Materials
  • Compatible Pumps

How to Use?

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Wrong material selection means corrosion, seal damage and unexpected process shutdown — in some cases leading to safety risk and ATEX non-compliance. This table lets you validate in seconds whether your pump's body and elastomer materials are compatible with the chemical to be transferred; it helps you safely ground your engineering decisions without needing to research technical datasheets.

Type the chemical name in the search box — resistance values from A (excellent) to D (incompatible) are listed instantly for PP, PVDF, aluminum, SS316, PTFE, EPDM, Viton and 20+ materials. All values are based on 20–25°C reference temperature; for high-temperature processes, it is recommended to interpret grade A at least one class lower. The material comparison table below lets you compare acid, base, solvent and maximum temperature information for PP, PVDF, SS316 and elastomers at a glance.

Click the pump icon alongside results to access Pumpport products directly with that material combination.

  • A — Excellent: suitable for continuous use, no restrictions
  • B — Good: mild chemical effect; usable, periodic inspection recommended
  • C — Medium: limited use; pay attention to temperature, concentration and duration
  • D — Incompatible: do not use; causes corrosion and safety risk
  • — No data: not tested; manufacturer's technical datasheet must be consulted
  • Values based on 20–25°C; at high temperature interpret grade A one class lower
Chemical compatibility table — PP, PVDF, SS316, PTFE material resistance values

Enter the chemicals you want to compare (maximum 3).

Chemical compatibility rating table for 26 pump materials. A: Excellent, B: Good, C: Fair, D: Incompatible.
Material — — —
Metals Aluminum - - -
Carbon Steel - - -
Cast/Ductile Iron - - -
17-4 Stainless - - -
304 Stainless - - -
316 Stainless - - -
Hastelloy C - - -
Plastics, Elastomers & Leather Acetal - - -
CSM (Hypalon) - - -
EPR, EPDM - - -
Fluorocarbon (FKM) - - -
Fluoroelastomer (Viton) - - -
Geolast (Buna & Polypropylene) - - -
Hytrel (TPE) - - -
Leather - - -
Natural Rubber - - -
Buna-N (Nitrile TS) - - -
Nitrile (TPE) - - -
Nylon - - -
Polychloroprene (Neoprene) - - -
Polypropylene - - -
PTFE - - -
PVDF (Kynar) - - -
Santoprene (EPDM & Polypropylene) - - -
UHMWPE - - -
Urethane - - -
A ExcellentRecommended B GoodUsable C MediumUse with caution D IncompatibleDo not use — No dataNot tested

Quick reference table for pump material compatibility with the most common industrial chemicals.

Chemical PP PVDF 316 SS AL PTFE EPDM FKM
Sulfuric Acid %10 Sulfuric Acid - 10% A A - D A A A
Hydrochloric Acid %20 Hydrochloric Acid - 20% A A D D A A A
Caustic Soda %20 Sodium Hydroxide (20%) A B B D A B -
Acetic Acid %20 Acetic Acid - 20% A A A B A A C
Acetone Acetone A D A A A C D
Ethanol Ethanol (Ethyl Alcohol) A A A B A A -
Hydrogen Peroxide %30 Hydrogen Peroxide - 30% B A B A A B A
Aqueous Ammonia Ammonia, Aqueous A A A D A A -
Nitric Acid %20 Nitric Acid - 20% A A A D A A -
Phosphoric Acid %20 Phosphoric Acid - 20% A A B D A A A
Seawater Sea Water A A C B A A A
Iron Chloride Ferric Chloride A A D D A A A
Sodium Hypochlorite Sodium Hypochlorite C A - D A C B
Toluene Toluene (Toluol) C A A A A D B
Methanol Methanol A A A A A A -

For the complete list, use the interactive table above. A = Excellent, B = Good, C = Fair, D = Incompatible, — = No data.

Pump Selection Guide

Pump Material Recommendations for Frequently Searched Chemicals

Sulfuric Acid Pump Selection

Sulfuric acid (H₂SO₄) exhibits radical material behavior differences depending on concentration and temperature. In dilute solutions of 10–75%, PP body + PTFE diaphragm combination carries an "A" resistance rating and offers an economical choice. At concentrations above 75%, PVDF body + PTFE diaphragm becomes mandatory. Aluminum and SS316L must absolutely not be used (D) with this chemical. If temperature exceeds 40°C, limit diaphragm selection to PTFE; EPDM and Viton drop to "C/D" at high concentrations.

NaOH / Caustic Soda Transfer

Sodium hydroxide solutions (up to 50%) are generally "A" compatible with PP and PVDF bodies. Aluminum-bodied pumps carry serious corrosion risk against bases and should not be preferred (D). Among diaphragm materials, EPDM and PTFE are first choice; Viton can be used in dilute solutions but drops to "C/D" at high concentration. For KOH applications in pharmaceutical production, the PVDF + PTFE combination eliminates both chemical resistance concerns and cross-contamination risk.

Hydrochloric Acid (HCl) Pump Compatibility

Since HCl rapidly destroys metals, aluminum and carbon steel (D) absolutely cannot be used. Even SS316L shows severe degradation above 5%. PP body performs well in dilute solutions (below 30%) while PVDF is required at high concentrations. PTFE diaphragm maintains an "A" rating across all concentration ranges and is the standard diaphragm choice for HCl transfer.

Solvent Transfer: Acetone, MEK, Toluene

Organic solvents damage the majority of elastomers. EPDM and NBR diaphragms exhibit swelling and degradation against acetone and MEK, making PTFE diaphragm the only safe option. PP shows "B–C" resistance in most solvents while PVDF maintains "A" across a broader solvent range. For aromatics such as toluene and xylene, staying with the PVDF body + PTFE diaphragm combination is the safest approach.

Phosphoric Acid Pump Selection

Phosphoric acid (H₃PO₄) is widely used in fertilizer production, metal surface treatment, and food industry (E338). PP and PVDF body show "A" compatibility up to 85% concentration. SS316L can be used in dilute solutions but its resistance drops noticeably with temperature. In food applications, FDA-approved PTFE diaphragm + PP body meets both chemical resistance and food safety requirements.

Hypochlorite (NaOCl / Bleach) Transfer

Sodium hypochlorite; widely used in water treatment and disinfection facilities, has strong oxidative effect. PP body is suitable up to 15% concentration; PVDF is required at higher concentrations. In diaphragm selection, Viton shows good resistance to hypochlorite while EPDM can unexpectedly degrade in oxidizing environments. PTFE maintains reliability across all ranges. Aluminum (D) is incompatible with this chemical.

Ethanol / IPA — Food and Pharmaceutical Applications

Isopropyl alcohol and ethanol; used in pharmaceutical cleaning processes, food equipment sanitization, and cosmetics. PP and PVDF body carry "A" rating for both alcohols. The critical point is the diaphragm: EPDM can show swelling depending on alcohol concentration, so PTFE has become standard in pharmaceutical applications. SS316L is also compatible with these chemicals. For processes requiring FDA and GMP, PVDF + PTFE combination should be preferred.

Material Guide

Material Comparison Table

Material Max. Temperature Acid Resistance Base Resistance Solvent Resistance Typical Use
PP (Polypropylene) ~100°C Excellent — dilute, non-oxidizing; weak in concentrated and oxidizing Excellent — including concentrated NaOH Medium — weak in aromatics and chlorinated solvents Chemical tank, pipeline, pump body
PVDF (Kynar) ~135°C Excellent — most acids including HF, HCl, HNO₃ Weak–Medium — risk of damage in hot/concentrated NaOH Good — resistant to most organic solvents Semiconductor, chlorine/halogen services, high purity systems
SS316 (Stainless Steel) ~300°C (liquid environment) Good — dilute; incompatible in concentrated HCl and HF Good Good — organic solvents Food processing, maritime, chemical reactor, pharmaceutical
Aluminum ~150°C Poor — rapidly wears in weak acids Poor — dissolves in alkaline environment Fair — risk in polar solvents Neutral and dry environment equipment, structural parts
PTFE ~260°C Excellent — inert to virtually every acid including HF Excellent Excellent — inert to practically all solvents Gasket, diaphragm, tube lining, food/pharmaceutical systems
EPDM ~150°C Good — dilute, non-oxidizing Good Poor — rapidly deteriorates in oils and hydrocarbons Water/steam gaskets, pool equipment, automotive cooling
FKM / Viton ~200°C Excellent Medium Good — hydrocarbons, aromatics; ketones and esters incompatible O-ring, gasket, chemical pump, petrochemical hose
Neoprene (CR) ~120°C Medium — dilute; weak concentrated Medium — dilute bases Weak — decomposes in aromatics, ketones, chlorinated solvents General purpose gasket, hose, marine applications
UHMWPE ~80°C Good–Excellent — except oxidizing acids Excellent Good — limited in polar and chlorinated solvents High wear channel liners, food processing, medical applications

Frequently Asked Questions

Frequently Asked Questions in Chemical Compatibility Selection

A = Excellent — suitable for continuous use. B = Good — mild chemical effect; usable. C = Medium — limited use; temperature and concentration control required. D = Incompatible — do not use this material; causes damage or safety risk.
Among thermoplastics, PVDF (Kynar) provides the broadest chemical resistance profile; it carries an A rating in most strong acids, halogens, and organic solvents. Among elastomers and diaphragm materials, PTFE is nearly a universal choice and stands out with its thermal stability between −200°C and +260°C.
PP (Polypropylene) is an economical choice for low–to–medium concentration acid, base, and salt solutions; maximum working temperature is approximately 100°C. PVDF offers broader chemical resistance, higher temperature performance (135°C), and better mechanical strength. In strong acid, halogen, and organic solvent applications, PVDF should be preferred. On the other hand, in strong base environments like concentrated NaOH, PP is safer than PVDF.
Both are austenitic stainless steel; the critical difference between them is that SS316 contains 2–3% molybdenum (Mo). Molybdenum significantly increases resistance to pitting corrosion in chloride environments. SS316 should be preferred in exposure to seawater, salt solutions, chlorinated sanitation solutions, phosphoric acid, and acetic acid. SS304 can safely operate at room temperature (~20–25°C) up to approximately 200–250 ppm chloride concentration; however, this threshold drops significantly when temperature exceeds 60°C. SS316 should be preferred in marine, salt solution, and chlorinated sanitation applications.
For 10–75 dilute sulfuric acid, PP and PVDF show excellent (A) compatibility. PTFE and EPDM are ideal. Aluminum and stainless steel are incompatible with sulfuric acid (D); should never be used. At high concentration (%75+), only PVDF + PTFE combination is safe.
This question is frequently answered incorrectly: PP shows good to excellent resistance to NaOH solutions up to 50% concentration at room temperature. PVDF, on the other hand, is rated as "D – Serious Damage" for concentrated NaOH in some resistance tables; PVDF becomes vulnerable to strong bases when temperature exceeds 60°C and concentration exceeds 10%. For pure high concentration NaOH, PP or HDPE should be preferred; for hot concentrated caustic applications (%30+, >60°C), PTFE or Hastelloy should be evaluated.
While PTFE shows excellent (A) resistance in ketones (acetone, MEK), FKM/Viton is absolutely incompatible and suffers severe damage. In aromatic hydrocarbons (toluene, benzene), PTFE and PVDF are reliable options; FKM provides medium-to-good resistance. EPDM and Neoprene are weak in both ketones and aromatics. In mixed environments containing multiple solvent classes, always refer to specific resistance tables and manufacturer tests.
PTFE and PVDF carry A (excellent) rating in both environments and are standard choices for chlorine service. FKM/Viton provides acceptable resistance in the A-B range. SS316 shows B rating at low-to-medium concentration but pitting risk increases in high-concentration and hot NaOCl environment. EPDM can be used at low concentrations. Wet chlorine gas containing moisture is much more aggressive than dry chlorine; at NaOCl concentrations above 12%, material selection requires special attention.
PTFE is an almost universal choice with extremely broad chemical resistance. However, molten alkali metals (sodium, potassium), elemental fluorine gas, and high-temperature fluorine compounds can affect PTFE. Apart from these exceptions, PTFE is among the most reliable materials.
Aluminum is incompatible (D) with strong acids (HCl, H₂SO₄, HNO₃), strong bases (NaOH, KOH) and saline/chloride solutions, carrying corrosion risk. It can be used with neutral pH (6–8) pure water, mild organic solutions and petroleum derivatives.
EPDM shows good performance in water, steam, dilute acids and bases, alcohols and polar solvents; suitable for food and hot water applications. Viton (FKM) is superior in aromatic and aliphatic hydrocarbons, oils, fuels and many acids; however, incompatibility in ketones such as acetone and MEK should not be forgotten. FKM should be preferred in organic solvent and hydrocarbon transfer.
International standards (ISO, ASTM, DIN) structure chemical compatibility tests at 20°C; at this temperature chemical reactivity and diffusion rates are stable and reproducible. As temperature increases, chemical substances penetrate polymer chains faster, swelling rate and reaction speed rise, material softens. In practice, if operating temperature is above 20°C, interpret the A rating in the table at least one class lower (as B or C) and always base on manufacturer technical datasheet.

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