Dosing skid — Precision Micro Gear

Precision Micro Gear Dosing Skid System LNS-DZ-PDG

A precision positive-displacement micro-gear dosing skid developed for very low-flow, high-repeatability chemical and additive injection — closely fitted rotating gears deliver near-continuous, low-pulsation flow and respond accurately to precision speed control.

Product overview · LNS-DZ-PDG

Description

Typical media

Fuel dyes and markers
Lubricity improvers
Performance additives
Catalysts
Specialty solvents
Lube-oil additives
Modifiers and inhibitors
Clean, non-abrasive process liquids

Design

Key features

Precision external or internal micro-gear pump
Near-continuous, low-pulsation delivery
Servo or VFD precision speed control
Single, duty/standby or multi-line package
Fine suction filtration
Optional duplex filter
High-accuracy low-flow meter

Pressure gauge and transmitter
Relief or bypass arrangement
Fine control or injection valve
Mechanical-seal or magnetic-drive option where available
Day tank or small buffer-vessel option
PLC/HMI and remote automation interface

Engineering approach

Minimum and maximum dosing rate
Differential pressure and internal slip
Viscosity across the operating-temperature range
Liquid lubricity
Vapor pressure and entrained gas
Maximum particle size and cleanliness
Meter rangeability and speed resolution
Mechanical-seal or magnetic-drive compatibility
A flooded or positive suction condition is preferred; suction piping is kept short and low-loss

Advantages

Excellent repeatability at very low flow
Near-continuous, low-pulsation delivery
Fine electronic capacity control
Compact multi-line construction

High-accuracy flow-feedback option
Mechanical-seal or magnetic-drive alternatives
Good fit for dyes, markers, catalysts and specialty additives
Easy integration with ratio and batch control

Safety philosophy

Filtration & viscosity philosophy

Stable performance requires clean liquid, correctly sized suction filtration and controlled viscosity
Very low viscosity can increase internal slip and reduce volumetric efficiency
High viscosity can increase suction loss and drive torque

Heating or heat tracing may be incorporated for viscous additives
Abrasive solids, crystallizing liquids and polymerizing fluids require special review
Calibration should cover the actual operating flow and viscosity range

Technical characteristics

Specifications

Product family	LNS-DZ Series — skid-mounted dosing systems
Model	LNS-DZ-PDG — Precision Micro Gear Dosing Skid System
Pump technology	Precision micro gear
Flow tendency	Very low to low
Pressure capability	Low to moderate
Flow character	Near-continuous
Corrosive liquid suitability	Conditional by material of construction
Very low-flow accuracy	Excellent
High-pressure injection	Limited
High-flow blending	Not primary
Cleanliness sensitivity	High
Primary capacity control	Precision speed control
Pulsation control	Normally not required
Typical skid duty	Fine additive dosing
Main design driver	Cleanliness / viscosity

Selection note: Final pump and skid selection is based on the chemical identity, concentration, minimum/normal/maximum flow, suction conditions, discharge pressure, density, viscosity, vapour pressure, temperature, solids content, required accuracy, turndown, materials and hazardous-area classification.

Where it's used

Typical applications

Fuel terminals
Refineries and petrochemical plants
Lubricant blending plants
Fine-chemical manufacturing

Catalyst and reagent systems
Pilot and process-development plants
OEM precision-dosing packages
Dye and marker injection systems