LEWA ecoflow INJ-LDD1 LA 16-10118 Diaphragm Dosing Chemical Pump

LEWA GmbH ecoflow® INJ-LDD1 LA 16-10118 Diaphragm Dosing Chemical Pump

The LEWA ecoflow® INJ-LDD1 LA 16-10118 is a hydraulically actuated diaphragm dosing pump engineered for demanding chemical injection applications. Built on LEWA’s field-proven ecoflow LDD variable-eccentric drive platform, this unit delivers high-precision, linear stroke-adjusted volume displacement while isolating process fluids via a hermetically sealed double PTFE sandwich diaphragm.

Designed to meet and exceed stringent API 675 standards, the INJ-LDD1 series provides continuous, pulse-free chemical metering even across fluctuating discharge pressures. Equipped with LEWA’s Diaphragm Protection System (DPS) and mechanical hydraulic replenish/bleed management, this pump protects against cavitating inlet flows, closed-valve deadheads, and overpressure line spikes. Whether handling hazardous corrosion inhibitors in offshore topside injection packages, boiler water conditioning chemicals in ship engine rooms, or viscous additives in petrochemical refinery streams, the ecoflow INJ-LDD1 delivers zero-leakage fluid transfer.

Model Details

• Manufacturer: LEWA GmbH (Leonberg, Germany)
• Series: ecoflow® Diaphragm Metering Pump Series
• Drive Frame / Type: LDD (Variable Eccentric Drive Unit, Type 1)
• Model Code: INJ-LDD1 LA 16-10118
• Pump Head Series: M900 / M800 series hydraulically coupled diaphragm head (configured for aggressive chemicals)
• Displacer Diameter: 16 mm (nominal plunger displacer driving the hydraulic chamber)
• Manufacturer Part Number (MPN): INJ-LDD1-LA16-10118

Features

1. Patented PTFE Multi-Layer Sandwich Diaphragm: Incorporates LEWA’s double-layer PTFE diaphragm system with an integrated visual/switch-ready diaphragm condition monitoring cell, preventing fluid cross-contamination in the event of primary membrane fatigue.
2. Patented DPS (Diaphragm Protection System): Spring-loaded hydraulic position control automatically locks the diaphragm in a neutral safety position during start-up, dry-run, or upstream line starvation.
3. Integrated Hydraulic Overpressure Relief Valve: Internally ported, adjustable hydraulic safety valve diverts oil within the hydraulic reservoir to protect the pump head against line blockages without venting toxic media to the atmosphere.
4. Linear Micrometric Stroke Adjustment: Delivers a reproducible metering accuracy well within ±1% across a 10:1 to 1:100 turndown range via a vernier-scale handwheel or automated actuator.
5. API 675 Certified Precision Performance: Fully satisfies standard industrial and marine oilfield metrics for steady-state accuracy, flow linearity, and displacement repeatability.

Compatible Equipment Models

• LEWA Drive Platforms: Direct integration with all LDD-series drive elements (LDD1 Simplex, Multiplex combinations LDD2 through LDD6).
• Automation Controllers & Actuators: Compatible with AUMA, SIPOS, or Rotork explosion-proof electrical stroke actuators (4–20 mA input / HART feedback), pneumatic positional actuators (0.2–1.0 bar / 3–15 psi), and variable frequency drives (ABB ACS880, Siemens Sinamics G120, Danfoss VLT).
• Diaphragm Monitoring Interfaces: Direct thread-in connection for LEWA mechanical differential pressure sensors, contact pressure gauges, and ATEX/IECEx inductive proximity sensors (e.g., Pepperl+Fuchs Namur sensors).
• Skid Configurations: Engineered for drops into standard chemical injection metering packages (CI skids) manufactured by Milton Roy, Lewa, Bran+Luebbe, and ProMinent process skids.

Part Number Cross-References

• Base Drive Assembly: LDD1-000-00 / LDD1-M-01
• Pump Head Replacement Assemblies: M910-16 / M810-16 / M510-16
• LEWA Spare Parts Kit (Wetted Maintenance): 0016-LDD-WETKIT / SPK-INJ-16
• Diaphragm Set: LEWA P/N 004128-16 / PTFE-SAN-16
• Valve Service Kit (Suction/Discharge Balls & Seats): VSK-16-SS316-TC

Frequently Asked Questions

What is the maximum working discharge pressure for the LEWA ecoflow INJ-LDD1 LA 16-10118?

Depending on the specific valve body alloy and pipe connection class, the 16 mm plunger assembly on the LDD1 frame handles working discharge pressures between 350 bar and 400 bar (5,075 to 5,800 psig) continuously under full load.

How does the diaphragm condition monitoring system work on this pump?

The pump head uses a double-layer PTFE sandwich diaphragm. In normal operation, a vacuum exists between the primary wetted diaphragm and the secondary backing diaphragm. If either membrane develops a microscopic perforation, process fluid or hydraulic oil enters the intermediate space, triggering a pressure rise detected either by an onboard mechanical contact gauge or an explosion-proof electrical pressure transmitter.

Can the stroke length be adjusted while the unit is running under load?

Yes. The variable-eccentric drive design allows linear stroke length adjustment from 0% to 100% whether the unit is completely stopped or operating against full system head pressure. The setting is adjusted via a vernier-scale mechanical handwheel or an automated electric/pneumatic actuator.

What viscosity range can this pump accommodate?

The ecoflow LDD1 platform with spring-loaded check valves reliably meters fluids with viscosities ranging from 0.1 mPa·s (such as liquid gas, alcohols, or solvents) up to 100,000 mPa·s. For highly viscous polymers or resins, valve diameters and stroke rates must be adjusted accordingly.

What routine maintenance is required for marine or offshore installations?

Routine maintenance involves checking the drive oil level sight glass, verifying hydraulic fluid condition, and observing the diaphragm monitor indicator. In continuous duty, change the drive gear oil every 8,000 operational hours or every 2 years (whichever comes first), and inspect or replace valve seats and the PTFE sandwich membrane assembly every 10,000 to 16,000 operating hours.a