Zhejiang Weilan Technology Co., Ltd.

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Selection guides, maintenance notes and application stories

Technical Articles

Online Turbidity Monitoring in Water Treatment

Turbidity analyzer principles, range selection and typical applications in plant water, membrane protection and effluent monitoring.

Technical Articles

Conductivity Monitoring for Cooling Water Cycles

Calculate cycles of concentration from online conductivity and interlock blowdown with dosing to save water and chemicals.

Technical Articles

ORP vs Residual Chlorine: Differences and How to Combine Them

ORP reflects oxidizing power while chlorine reflects dosage — how to choose and combine them.

Applications

Pool Water Standards and Automated Control

Key pool water limits explained, plus a pH/chlorine closed-loop dosing automation design.

Applications

Boiler Water Treatment Dosing Essentials

Roles and dosing control of ammonia, hydrazine and phosphate, with automated dosing system design.

Technical Articles

Tips for Dissolving and Dosing PAC/PAM

Flocculant solution strength, maturation time, dosing-point selection and common preparation mistakes.

Technical Articles

Metering Pump Installation and Piping Design

Engineering details that determine dosing accuracy: mounting height, pipe sizing and dampener configuration.

Maintenance

Winterizing Your Dosing System

How cold affects pumps and chemicals, insulation and heat-tracing measures, and shutdown protection.

FAQ

Metering Pump Selection FAQ

The 8 most common selection questions — sizing flow, choosing materials, VFD or not — answered clearly.

Industry News

Quick Overview of Water Quality Standards

Key parameters from drinking water, pool and hospital wastewater standards for instrument selection.

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