SOS-ESL Electrostatic Sprayer for Lecithin

HART Design & Manufacturing’s Electrostatic Sprayer for Lecithin is engineered for precise, consistent oil application with minimal waste. Ideal for continuous production lines, this in-line system delivers a uniform, electrostatically charged spray that adheres directly to grounded surfaces for superior coating performance.

Repeatable, Consistent Lecithin Application
Effectively Manage Line Speed Changes (opt. sensor for line speed reference signal)
Accurate, Superior Quality (uniform, precise coating)
Improved Performance, Virtually Zero Waste (charged oil targets the grounded surface

Built for reliability and efficiency, the SOS-ESL helps maximize yield and product quality—while adapting to your production environment.

SOS-ESL Electrostatic Sprayer for Lecithin

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Application Efficiency

Max Operating Temperature

Viscosity Range

Precision Spraying Action urate Operation

These electro-hydrodynamic coating machines apply voltage to the Lecithin, charging the oil and propelling it from the nozzle. A uniform, precision coating is created when the electrostatically charged droplets target the grounded surface.

The ESL model Electrostatic Sprayer is an automatic, in-line system which is typically integrated onto the back end of a casting line; it atomizes Lecithin which it applies to the target product in a tightly controlled formation with virtually zero waste.

Maximize Yield

Experience less waste as the atomized, charged spray precisely targets the grounded surface. No mechanical force is used to produce the spray pattern – so over-spray and misting are minimized.

The nozzle is made of non-conductive plastic and encapsulates a stainless steel “spray plate” that acts as a metering device and an electrode. Uniform, precise droplets are generated by charging the fluid as it enters the nozzle cavity, passing over the electrode (high voltage DC). The fluid is instantly charged, attracted to the intended product. The charged droplets seek out and adhere to the grounded surface, creating an extremely uniform and controllable coating.

Easy, Accurate Operation

How it Works
An intuitive touch screen interface allows ESL operators to effectively navigate programs and settings. The Blower/Heater Skid’s control panel also includes easily identifiable physical buttons.

Optional, integrated sensor(s) can allow the HMI to function in AUTO mode, making adjustments automatically based on a reference signal from the Casting Line.
INFEED

Continuous loading: system is automatically fed Lecithin from the reservoir (tank) on the Pump Cart

CHOOSE

Select AUTO/MANUAL mode on the HMI (touch screen)

INPUT

Specify your desired setpoints on the HMI, the High Voltage System, and on the Blower/Heater panel

START

On the Blower/Heater panel, turn blower switch ON and then turn temperature switch ON

On the HMI, press & hold START to start the Spray Pump Drive; then, once Lecithin is dripping from the nozzle, press & hold START to start the High Voltage System

OUTPUT (APPLY LECITHIN)

An electrostatic nozzle sprays fluid onto the product at a rate/volume determined by the coverage, the product width, and the line speed. The volume of fluid being supplied is controlled by pump speed (RPM). The pump speed is controlled by a VFD drive, controlled by the PLC. The PLC can monitor the line speed (if applicable) to maintain the selected coverage and product width. Fluid is pumped to the nozzle and the high voltage applied to the electrode (spray plates inside nozzle) charges the fluid molecules. The voltage charges the molecules, causing the fluid to be electrostatically attracted to the product – the positively charged spray seeks the neutral, grounded surface. Inductor bars positioned on each side of the nozzle “steer” the charged spray toward the grounded surface.

Technical Data

Oil Specifications

OIL
Lecithin (alternative oils available on request)

SPECIFIC GRAVITY
0.85 – 1.0

VISCOSITY
10 – 250 cps

CONDUCTIVITY
30-8 100k (picosiemens) 3.38 to 1.09 (ohm-cm)

TEMPERATURE
60-120°F (23.8-48.8°C)

MAX. PRODUCTION SPEED
Varies per machine, reference order specifications (operator & product dependent)
Utility Requirements
Design

INPUT METHOD
Continuous, Automatic Loading

OUTPUT METHOD
Continuous, Automatic Unloading

CONSTRUCTION
Sanitary

STATIONARY/MOBILE
Stationary, Tracked Forward/Backward Movement

OVERALL DIMENSIONS
Varies, reference your Assembly Drawings for dimensions

CONTROLS
Human Machine Interface (HMI) Touch Screen, Pushbutton Reset, Emergency Stop (E-Stop), and assorted switches

CHANGE PARTS
Custom programming (if ordered for alternative product applications), Valving on supply tubing, for adjustable spray width

CLEANING
Wipe-down construction, follow instructions in the Cleaning chapter. Improper cleaning methods and/or materials will damage the ESL. Touch screen has ingress IP65 protection. However, as with all electrical components & enclosures, we recommend covering/protecting when cleaning.

INSTRUCTION MANUAL
Included
Construction

Accessories & Alternative Solutions

Integration Options
REFERENCE LINE SPEED with a integrated sensor and special programming for AUTO mode

CUSTOM TROLLEY-TRACK STYLE INTEGRATION PACKAGE Frame Components (for line integration) includes modifications to Sprayer Hood for mounting, trolley-style mounting allows sprayer to be backed off when not in use, a sensor allows the system to prevent operation when the sprayer is not in operating position
Humidity Control Package
BLOWER/HEATER SKID (WITH CONTROLS ENCLOSURE) for humidity control, preventing condensation – controls enclosure typically mounts to framing; includes modifications to the Sprayer Hood for air connections

Trust HART Automation

Automatic spraying system is equipped with standard safety features, including an emergency stop button.

Included Functions

Sprayer, High Voltage System, Pump Cart, Optional Framing / Integration, and Optional Blower / Heater Skid.

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