|
Metering pumps can be considered an
irreplaceable instrument that allows the
transfer, measure and control of liquids in
a process.
Customers requirements to meet with a
broad variety of applications, along with
economical considerations, led us to the
design of modular systems of pumps.
The SWE Exacta Series pumps of SEKO
can be assembled to match nearly any
dosing and budget requirement with our
standard executions.
Should a special execution not to be
included in our standard manufacturing
program, the experience of more than 40
years gives us the know-how to design
customized solutions.
Mechanism
EXACTA®
E Exacta
Series
The mechanisms of the E Exacta Series
have been designed conforming to API
675 Standards. Three sizes of increasing
power are available. Oil bath lubricated,
very compact and rugged, designed for
continuous and heavy-duty operations.
The stroke length is adjustable from zero
to the maximum manually or, on request,
by means of an electric servomotor or
pneumatic positioner; the set adjustment
can be read on a dial indicator.
Multiheaded units can be assembled by
combining mechanism of the same or
different sizes. Gearboxes are available
with different reduction ratios for an
accurate selection of the performances.
Steady state accuracy,
repeatibilty and linearity:
in accordance with API 675 standards.
Flexibility:
Assembling of mechanisms of the same
or different sizes.
Drive
The standard execution includes the coupling to an electric motor at fixed or variable
speed or flame proof execution. Other options: NEMA Standards motors, D.C.
motors, mechanical speed variators, frequency converters (VCD).
Stroke length
adjustment
It operates at pump running or at rest and includes a
blocking device suitable to fix the selected flow rate.
Manual adjustment:
The clockwise allows the continuous stroke adjustment
with the pump running or at rest. A blockage system fixes
the rated flowrate.
Actuator:
Control signal: IN/OUT signal 4÷20 mA.
Profibus® signal available.
It includes include few non common characteristics such
as: stroke limiters, overload protection, feed back signal,
position indicator, flame proof execution; any component
to be installed inside the control panel.
Pneumatic positioners:
Control signal: 0,2÷1 bar (3÷15 p.s.i.)
Profibus® signal available.
Option: I/P converter from 4÷20 mA to 0,2÷1 bar
(3÷15 p.s.i.)
Standards
API 675 Hydraulic Diaphgram Metering Pumps
2 process & systems
|
