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The chart below is only a guide to selecting the pump and
diaphragm material which is compatible with the fluid you
To reduce the risk of serious bodily injury and property
damage from component rupture, always follow these
precautions:
1. Never use fluids in this pump which are not com-
patible with the wetted parts listed in the Technical
Pumps with Aluminum Covers and Manifolds (Models 218–940, 218–942, 220–438 and 220–546)
Operating
Diaphragm
Temperature
Material
Range
Buna–N
0–88 C
(32–190 F)
EPDM
0–100 C
(32–212 F)
Polyester
0–100 C
Elastomer
(32–212 F)
PTFE
0–100 C
(PTFE)
(32–212 F)
Pumps with Stainless Steel Covers and Manifolds (Models 220–434, 220–435, 220–436 and 220–545)
Operating
Diaphragm
Temperature
Material
Range
Buna–N
0–88 C
(32–190 F)
EPDM
0–100 C
(32–212 F)
Polyester
0–100 C
Elastomer
(32–212 F)
PTFE
0–100 C
(PTFE)
(32–212 F)
COMPATIBILITY CHART
WARNING
Recommended for pumping:
Water, oil, hydraulic fluids, most
hydrocarbons
Alcohols, weak alkalies, esters,
ketones, silicone oils, water, or-
ganic acids, aldehydes, amines
Excellent resistance to alcohols,
hydrocarbons, water, silicone and
vegetable oils, organic acids and
alkalies. Good resitance to esters,
ethers and ketones.
Most chemicals
Recommended for pumping:
Water, oil, hydraulic fluids, most
hydrocarbons
Alcohols, weak alkalies, esters,
ketones, silicone oils, water, or-
ganic acids, aldehydes, amines
Excellent resistance to alcohols,
hydrocarbons, water, silicone and
vegetable oils, organic acids and
alkalies. Good resitance to esters,
ethers and ketones.
Most chemicals
are pumping. Always read and follow the fluid supplier's
recommendations on material and fluid compatibility.
Data on the back cover of this manual, or with the
diaphragm of this pump.
2. Read and follow all warnings regarding
FLUID HAZARD on page 2.
3. Be sure to avoid contact with heated fluid which
may burn your skin.
Not recommended for pumping:
Strong alkalies, halogenated hydrocar-
bons, highly polar solvents such as
ketones (acetone, MEK), ozone, alde-
hydes, amines, nitro–hydrocarbons,
esters, ethers
Halogenated hydrocarbons, hydrocar-
bons, silicate esters, ethers, animal
oils, vegetable oils
Strong alkalies, halogenated hydrocar-
bons, inorganic acids, aldehydes,
most amines, aromatics
Halogenated hydrocarbons, very
aggressive acids
Not recommended for pumping:
Highly polar solvents such as ketones
(acetone, MEK), ozone, aldehydes,
amines, nitro–hydrocarbons, esters,
ethers
Hydrocarbons, silicate esters, ethers,
animal oils, inorganic acids, vegetable
oils
Inorganic acids, aldehydes, most
amines, aromatics
Very aggressive acids
TOXIC
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