LL general with X transmitter0 pages

MAX FLOW SIZES
FROM 5 GPH to 20 GPM
(20 LPH TO 75 LPM)

MAX LIQUID PRESSURE 300 PSI t (20.69 BAR)t
LL SERIES
MAX LIQUID PRESSURE 500 PSI t (34.48 BAR)t
LP SERIES
MAX LIQUID PRESSURE 1500 PSI t(103.45 BAR)t LH SERIES

Flow meters,
Flow switches and
Flow transmitters

A piston design for tttt
low flows of liquids
®

CSA Certified NRTL/C

LR63883

NRTL/C

LL Series, with standard scale
and pointer (control box A).

CE Marked (as noted)
®

®

LR63883

NRTL/C

®

®

LR63883

NIST Traceable Calibration
Certificate Available
®

NATL/C

LR63883

NATL/C

DESCRIPTION
These variable-area meters
position an orifice over a tapered
shaft to establish flow rate.
Mounting is in-line and in any position. Straight pipe runs before or
after this monitor are not required.
The all-mechanical sensing
system directly drives the pointer,
switches and transmitters.
READOUTS
The flowmeter has outputs both
visual and electronic. Visual
displays are either pointer (with
inscribed scale) or numeric (digital LCD). Electronic outputs can
be mechanical switch closure,
4-20 mA analog or both (for signal
redundancy). The switches can
be general purpose or rated for
hazardous locations (all classes,
groups and divisions). The 4-20
mA transmitters are Intrinsically
Safe if used with approved
barriers.

LL Series

LL091312 t

CALIBRATION
All flow meters are individually
calibrated for fluids with the
viscosity you specify (up to 3000
SSU/650 Centistokes). We also
compensate for your fluid’s specific
gravity. For NIST Traceability
please consult factory.
CONSTRUCTION MATERIALS
Housings and seals are offered in
a variety of materials to suit a wide
range of applications, such as: water, oil, coolants, paint, solvents and
some corrosive fluids. See selections in the “How to Order” section.
LINE CONNECTION
Ports can be threaded or flanged.
See selections in the “How to Order”
section.

1

Fluid flow causes a
spring-loaded piston
A having a circular
opening at its center B
to move along the axis
of a precision-tapered
shaft C. This creates a
variable orifice in direct
proportion to the flow
rate. The piston is mechanically linked to the
readout pointer D and
actuates switch E or a
transmitter (not shown).

Viton® and Kalrez™ are registered trademarks
for DuPont Performance Elastomers.