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Useful Information

It is our intention to provide useful reference materials, to help clarify and inform our customers about some of the technical and practical issues that need to be considered when sourcing and installing pumps for liquids. This includes chemical resistance guides to help specify suitable wetted materials for the pump and fittings, guidelines on viscosities of common liquids, information on suction filter sizing and a simple guide explaining the different IP ingress protection ratings.

We have also explained how to select a suitable drum pump or barrel pump and have given some guidance on when to select a positive displacement pump and their installation and operation. We have also clarified why positive displacement pumps should be protected from over-pressure by installing relief valves.

Information is provided on how gear pumps can be used for metering and dosing as well as data on how Hydra-Cell multiple diaphragm pumps perform against the American Petroleum Institute standard reference API 675 for Positive Displacement Pumps - Controlled Volume.

GENERAL INFORMATION CHEMICAL RESISTANCE GUIDES
IP Protection Classes Liquiflo chemical resistance chart
Viscosities of common liquids Ismatec chemical resistance chart
Suction filter data FTI chemical resistance guide
Some common types of pump seals POSITIVE DISPLACEMENT PUMPING GUIDES
Michael Smith Engineers Pump Enquiry sheet When to select a Positive Displacement Pump
Conversion table for different units of viscosity Positive Displacement Pump installation & operation advice sheet
Pump efficiency and life-cycle cost calculation Overview of types of Rotary Positive Displacement Pump
PUMPING PRINCIPLES Comparing four types of Positive Displacement Pump
How a Peristaltic Pump works Viking Pump comparison between Rotary Positive Displacement Pumps and Centrifugal Pumps
How an FMI Rotating Reciprocating Piston Pump works Viking Pump guide on when to use a PD pump vs a Centrifugal Pump
Internal Gear Pump principles A guide to liquids commonly pumped by Rotary Positive Displacement Pumps
External Gear Pump principles Pumping abrasive liquids with Rotary Positive Displacement Pumps
Lobe Pump principles Pumping fuel oils with Rotary Positive Displacement Pumps
Vane Pump principles Pumping high temperature liquids with Rotary Positive Displacement Pumps
Gerotor Pump principles Pumping shear sensitive liquids with Rotary Positive Displacement Pumps
DRUM PUMP GUIDES Liquid containment for Rotary Positive Displacement Pumps
How to select a Drum Pump Gear Pumps for metering applications
HSE guidance on drum emptying using a drum pump NPSHR and its effect on Rotary Positive Displacement Pumps
HYDRACELL METERING PUMP PERFORMANCE GUIDE Why use relief valves with Liquiflo Gear Pumps
Hydracell Metering Solutions Performance against API 675 Introduction on Positive Displacement Pumps


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engineers ltd
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