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JEW diaphragm type metering pump, 1000 LPH, polypropylene (PP) liquid end

11 Nov 26

Sodium Hypochlorite Dosing Pump: Selection, Materials and Gas-Locking Fixes

Sodium Hypochlorite Dosing Pump: Selection, Materials and Gas-Locking Fixes Quick answer: Use a diaphragm metering pump with a PVDF or PP liquid end, PTFE-faced diaphragm and ceramic or PTFE valve balls. Avoid stainless steel. Keep the suction short and flooded and fit a degassing valve, because hypochlorite gives off gas that air-locks the pump. Sodium […]

JEW plunger type metering pump, 1000 LPH, SS316 liquid end, with 1.5 HP motor on base frame

10 Nov 26

Swimming Pool Chlorine and pH Dosing Pump: Setup Guide

Swimming Pool Chlorine and pH Dosing Pump: Setup Guide Quick answer: Most pools use two small diaphragm dosing pumps: one for sodium hypochlorite (chlorine) and one for acid or soda to correct pH. They inject into the return line after the filter and heater. Pump heads in PP or PVDF with PTFE diaphragms suit both […]

09 Nov 26

What Is a Metering Pump and How Does It Work?

What Is a Metering Pump and How Does It Work? Quick answer: A metering pump (dosing pump) is a positive displacement pump that delivers a precise, adjustable volume of liquid with every stroke. A motor drives a plunger or diaphragm back and forth; suction and discharge check valves make each stroke push a fixed volume, […]

06 Nov 26

Dosing Pump Not Delivering Flow? 9 Common Causes and Fixes

Dosing pump running but not pumping? Nine common causes, from air locks and dirty check valves to worn packing and relief valve problems, with fixes.

05 Nov 26

Pressure Relief Valve for Dosing Pumps: Why You Need One and How to Set It

Pressure Relief Valve for Dosing Pumps: Why You Need One and How to Set It Quick answer: A metering pump keeps pushing liquid even when the discharge line is blocked, so pressure rises until something breaks. A pressure relief valve (PRV) on the discharge side opens at a set pressure, usually 10–20% above normal working […]

04 Nov 26

How to Size a Dosing Pump: Step-by-Step with Worked Examples

Dosing pump sizing made simple: the formula, how to convert chemical strength, how to pick capacity and pressure, with three worked examples.

02 Nov 26

Plunger vs Diaphragm Metering Pump: Which One Should You Choose?

How plunger and diaphragm metering pumps differ in pressure, leakage, maintenance and chemical handling, and how to choose between them.

Sodium Hypochlorite Dosing Pump: Selection, Materials and Gas-Locking Fixes

Swimming Pool Chlorine and pH Dosing Pump: Setup Guide

What Is a Metering Pump and How Does It Work?

Dosing Pump Not Delivering Flow? 9 Common Causes and Fixes

Pressure Relief Valve for Dosing Pumps: Why You Need One and How to Set It

How to Size a Dosing Pump: Step-by-Step with Worked Examples

Plunger vs Diaphragm Metering Pump: Which One Should You Choose?

Amar Shah, B.E. (Mechanical) – Proprietor & Chief Engineer | JEW Pumps

Sulphuric Acid Dosing Pump: Material, Safety and Setup Guide

Ferric Chloride (FeCl₃) Dosing Pump: Chloride Corrosion & ETP Coagulant Solutions

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