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 Control Valves
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Class
DLO/DLOS
Single-Seated,
Unbalanced Valves with Cage Retained Seat
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• 1 - 4" Valve Sizes
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• Cv Range: 0.5 - 201
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• ANSI CL 125 - 300, DIN PN10 - 40
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• End Conn.: RFF, THD, SWE, BWE
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• Body Mat'l: Cast Iron, WCB, CF8M
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 These
versatile single-seated, unbalanced, cage-retained
trim, diaphragm control valves put the premium on
performance at a competitive price. Suitable for
use in steam, water, gas and process applications,
this valve series has found acceptance in
industries ranging from food and beverage
processing to power generation.
Greater Versatility
Heavy, 2-point stem guiding makes the DLO-2
especially suitable for dirty, viscous and corrosive
fluids as well as for clean fluids. Because there are
absolutely no threaded internal parts, these valves are
ideal for corrosive services. They can be maintained
without removing the valve from the pipeline.
 Trim
and cage options include 316 stainless steel
(standard), resilient seats or hardfacing with
Stellite® alloy.
Lower-Cost Maintenance
Leslie's unique design allows maximum interchangeability
of parts. Substantial reduction of spare parts inventory
is possible because trim parts and actuators can be used
on many different body sizes.
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• 2 - 12" Valve Sizes
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• Cv: 26 - 1240
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• ANSI 150 - 600, DIN PN10 - 100
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• End Conn.: BWE, SWE, RF,
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• Body Mat'l: Cast Iron, WCB, WC9, CF8M
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RTJ, THD
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These
Leslie control valves are rugged, reliable units specially
designed for use in steam, water, gas, vapor and
non-corrosive liquid service. The balanced cage-throttling
design permits these valves to be operated with small,
compact and economical actuators against fluid pressure
drops up to 1480 psig and 800°F., (subject to body
pressure/temperature ratings and actuator limits).
Hung-Cage Construction
 A
unique hung-cage throttling design eliminates gasket
damage and bonnet or seat leaks due to thermal expansion.
Anti-cavitation (Les-Cav) and low-noise (Les-Sonic)
cages are available for special situations. Cages and trim
material are 400 series stainless steel with optional
Stellite® hardfacing available.
Standard valve packing is braided Teflon® graphite.
Teflon® chevron and graphite type II is optional for
higher temperature service.
Easy Maintenance
The cage trim is easy to remove for inspection or
replacement. There are no welded, screwed-in or press-fit
parts. Capacity changes are achieved simply by replacing
the cage. There's no need to replace any other parts or
add any adapters.
Aeroflow
High Performance Control Valves
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• 1 - 16" Valve Sizes
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• Cv Range: 0.01 - 3100
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• ANSI CL 150 - 4500, DIN PN10 - 400
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• End Conn.: BWE, SWE, RF, RTJ, THD
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• Body Matíl: WCB, C5, WC9, CF8M
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 The
unique technology of the Aeroflow begins with
aerodynamic vanes cast into the valve body
inlet and outlet. Inlet vanes help divert
incoming flow evenly around the cage,
minimizing turbulence and flow instability as
well as improving flow capacity. Outlet
vanes minimize turbulence to reduce noise
and body erosion. A wide range of
interchangeable trim options and custom
characterized cages provide the
flexibility of many sought after benefits.
 Tight
Shut-Off (exceeds ANSI Class VI)
Unlike competitive valves rated for Class IV, V,
or VI shut-off, Aeroflow's pressure
energized pilot balanced plug provides
zero cc/min. leak rates, without penalty of
huge actuators, even with metal to metal seats
at full body pressure/temperature ratings.
Aeroflow's shut-off capability is in a
class all its own. The pilot balanced plug
design minimizes actuator size and cost. Proven
pilot design also eliminates the need for any
piston seals to insure tight shut-off,
greatly increasing the valve's
reliability.
Parts Interchangeablity
With the exception of bodies, all parts are
interchangeable between globe and angle body
styles with the same size and function.
Facilities needing various trim designs in
both globe and angle style bodies can
minimize parts inventories, maintenance and
training.
 Tri-Sheer
Protected Seat Design
Proven in more than 20 years of power plant
service, Leslie's "protected"
seat design protects Aeroflow's superior
shut-off characteristic three ways. First,
the protected seat prevents high velocity
transients at opening or closure of the valve.
Secondly, a five-stage pressure drop
occurs near the seating position and last,
the plug/seat surface is withdrawn from
the direct flow to prevent direct particle
impingement or clamping. The Tri-Sheer allows
prolonged throttling at the seat without
wire draw due to high clearance flow
velocities.
Quick-Change Seat Design
In 4-16" body sizes, Aeroflow's seat ring
is not threaded, welded, or loaded in
place by the cage. Seat retention and seat
gasket loading are accomplished with a
stainless steel load ring and multiple
silver-plated load screws for controlled
seat gasket loading which is impervious to
thermal shock.
Hung Cage for Thermal Expansion
The quick-change seat features a cage which is
hung in the body. This allows the cage to
expand freely through sudden wide
variations in fluid temperature. This
tolerance for cage expansion solves the typical
problems seen in cage retained designs
such as cage warping, plug binding,
galling, and crushed gaskets.
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Class
KMax Rotary Control Valves
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• 1 - 8" Valve Sizes
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• Cv Range: 0.25 - 800
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• ANSI 150 - 600
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• End Conn.: RFF, Wafer
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• Body Mat'l: WCB, CF8M, Exotic Alloys
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 The
Leslie K-Max is designed and engineered to handle nearly all industrial process
control requirements. For over 15 years, the K-Max has been in successful
service in thousands of applications worldwide including high and low pressure
steam, clean, dirty, and corrosive liquids and gases, and erosive and abrasive
slurries.
Superior Features
Other features include reduced port trim options, class V shutoff option,
Alloy 6® trim hardening option, bi-directional flow capability (while
maintaining shut-off class in either direction), and triple bearing large
diameter precision splined shaft for tortional and flexural rigidity with
excellent radial support.
Greater Efficiency
Efficient straight-through flow design allows for a much lower cost per Cv
than conventional globe style valves with the same degree of quality people have
come to expect from Leslie.
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• 2 - 8" Valve Sizes
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• End Conn.: BWE, SWE, RF, RTJ, THD
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• Cv: .5 - 760
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• ANSI 150 - 600, DIN PN10 - 100
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• Body Mat'l: Cast Iron, WCB, WC9, CF8M
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 Leslie’s
New DigiValves features the Digi Electric Actuator mounted on
Leslie DLO and DBOY control valve bodies. The DigiValves offer
all the same great features and benefits of Leslie’s DBOY and
DLO with an electrical actuator.
They are especially recommended for light industrial,
commercial and higher performing HVAC liquid and steam
applications.
DigiValves feature a
Digital Actuator Control (DAC) for precise control. The DAC
allows automatic adaptation to valve stroke and characteristic
and provides a 4-20 mA feedback signal. Digi Actuators are
available in three thrust/speed combinations and can accept
analog signals (4-20 mA, 0-10 V DC or PROFIBUS DP) or signals
from 3-term-step controllers. A DigiValve is capable of shutoff
to 750 psi. The Digi Electric Actuator is CE Certified (the
European Equivalent of UL in the United States). Digi Actuators
are available with separate bi-directional force and limit
switches, a self-locking stall proof stop motor, manual hand
wheel and heater. DigiDBOY
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 DigiValve
Actuator
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DigiDLO
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