FMI Q431 "Q User Manual
Page 6
PUMP HEAD INFORMATION
THINGS YOU SHOULD KNOW BEFORE OR-
DERING THE FLUID HANDLING PORTION (or
parts thereof) OF AN FMI MODEL Q PUMP, i.e.
the removable assembly that is often referred to
as the liquid end, the piston/cylinder set, or the
Pump Head Module (PHM) assembly.
To accommodate the diverse demands of labora-
tory and industrial pumping applications, FMI’s Q-
Pumps are arranged to accept interchangeable
PHM’s with differing chemical and mechanical
characteristics. There are a number of these as-
semblies from which the pump user may select in
solving difficult fluid pumping problems.
To simplify the selection process, each individual
type of fluid handling assembly (piston/cylinder
set) is designated by an alpha-numeric code which
permits direct identification of pertinent factors.
Q-PUMP DESIGNATIONS
Example:
Q-1-SAN denotes a sanitary construction pump
head assembly having a 1/4” diameter ceramic
piston, ceramic cylinder liner and a 316 stainless
steel cylinder case.
PLEASE NOTE:
1. When the last three of the above shown cate-
gories are not called out, standard materials and
construction are implied (CKC).
2. If SAN is designated in the last category, the
preceding three categories will be designated CSC
as required by FDA specifications.
3. Piston seals made of an inert material, Rulon
AR, are used in all FMI type Q Pump Heads except
high speed pumps fitted with stainless steel pis-
tons (these use Rulon J seals) and sanitary (SAN)
pump heads which require virgin Teflon (T) seals.
Specify AR, J or T after the pump head code des-
ignation to order pump heads assembled with
other than standard seals.
4. Ceramic cylinder liners should be used with ce-
ramic piston only.
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IN-Q431-09A
See Materials of Construction section in the Fluid Metering catalog for more information on wetted parts *316 Stainless Steel
cylinder cases accept ¼ NPT male fittings.
When ordering specify: Piston Size Code + Material of Construction + Option Code (Q1+CKC+W = Q1CKC-W
*CF = Consult factory for details
CF
CF
CF
CF
CF
CF
CF
CF