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Process Samplers

Drawing process samples in open containers invites contamination and inaccuracy, and also poses serious health, safety and environmental risks. Due to the growing complexity of the industrial processes in general and more specific for processes in the (petro)chemical and pharmaceutical industries, the need for tests and analyses increases continuously. The need for representative samples plays a critical role in ensuring product verification. Yet sampling directly from the process often includes the risks of exposure to the operator, as well as contamination and pollution to the environment.

Introduction to Process Sampling

Introduction to Sampling - This sampler solves the problem of taking samples of toxic, dangerous and volatile substances. it has the following advantages

Grab Sampling Systems: Maintaining Quality and Safety -The need for representative samples plays a critical role in ensuring product verification. Yet sampling directly from the process often includes the risks of exposure to the operator as well as contamination and pollution to the environment. The DOPAK® sampling method reduces such risks with its patented design and simple method of operation. The bulletin also includes details of sampling in bottles and cylinders. In addition many applications are detailed.

Specifications for Process Samplers

Specifications and Datasheets for Samplers - Covers a wide range of samplers

Process Liquid Samplers

Liquid Samplers - These Samplers take representative samples of liquids with low vapour pressures at low process pressures. Applications include Liquids at lower pressure, Sampling with lower vapour pressures, Corrosive, hazardous liquids, Viscous fluids, slurries and Sampling from pipelines and tanks.

Typical Configurations - These links show excellent details of the sampler configurations. 

Open Liquid Sampling from Storage Tanks, Drums, Bags and Process Lines - Liquids at atmospheric pressure, Low hazardous liquids, Sampling from storage tanks, drums and pipelines and Fixed Volume Sampling

Liquid Sampler c/w Air Driven Pump and Carry on Frame - This DPM sampler, in system purge configuration complete with an air driven pump and carry on frame, allows the product to be pumped continuously through the sampler to ensure the retrieval of a representative and contamination free sample. The carry on frame complete with flexible hoses and quick connects creates a portable sampler ideal for sampling liquids on board ships.

Vessel Liquid Sampler c/w Dip Pipe with Submerged Pump - This new arrangement allows for sampling of liquids from the top of large vessels (with or without agitator) where insufficient vacuum can be created to lift the liquid from the vessel.

Process Solid Samplers

Solid Samplers- These samplers are used for applications such as Solid Sampling at atmospheric pressure, Sampling from bags, Sampling granulates, Powders, Grease and Fixed Volume sampling.

Typical Configurations

Open Solid Sampling from Storage Tanks, Drums, Bags and Process Lines - Solid sampling at atmospheric pressure, Sampling from bags, Sampling granulates-powders-grease and Fixed volume sampling.

Liquified Gas Process Samplers

Liquefied gas (LPG) sampler - These Samplers with externally coupled valves take representative samples of liquefied gases or liquids in cylinders with internal or external outage. Typical applications include Liquefied gas sampling, Fixed external outage,  High vapour pressure liquids and Zero quick connect vapour release

Typical Configurations

Gas Process Samplers

Gas Sampler - These samplers with externally coupled valves take representative samples of gases in cylinders.

Typical Configurations

Process Sampler Installation, Maintenance, Safety, Storage & Handling Instructions 

Installation, Maintenance, Safety, Storage and Handling Instructions - In accordance with the requirements of the European Equipment Directive 97/23/EC and 99/36/EC. This document provides installation, maintenance, storage and handling instructions for DOPAK Sampling Systems series DPM, HD, DPJ, DPT, S23, S32, S32-(L)G, DPO and Sample Stations.

Process Sampling Containers

Sampling Containers - This link covers;
- Sampling in bottles - A sample is drawn from the process and arrives at atmospheric pressure in the sample container.
- Sampling in containers - A sample is drawn from the process and arrives at process pressure in the sample container.

Process Sampler Applications

Applications for Dopak® Sampling Systems - This link provides a list of typical applications for Dopak® Sampling Systems in Refining, Petro-Chemical, Pharmaceutical, Pulp / Paper and Power Generation.

Other Process Sampler Links

Powder or Granule Stream samplers - These samplers can be used to sample almost any powder or granule stream by either a composite, batch or grab sample.  The design prevents exposure of the operators to any hazardous process media as collection is always isolated from process and can’t be left open.  From our sponsor Zedflo

6.11 Accurate Composite Sampling of Natural Gas - To ensure ACCURATE sampling of natural gas, the sample taken must be repeatable and representative of the product flowing in the pipeline, per GPA 2166-88, this technical bulletin lists three essentials - from Haldatec

6.11 Oil & Liquid Hydrocarbon Sampling - Sampling liquids usually takes two forms, spot or representative. Spot samples are taken at one time at one point, normally via a pitot tube inserted in the process or pipeline. The sample is collected in a sample cylinder and taken to a laboratory for analysis.This form of sampling will only give a sample that is representative at one point in time only. Alternatively, Representative samples of light oil or condensate are collected using a by-pass sampler mounted adjacent to the pipe or mounted directly on the pipe. Grab samples are then collected in a sample cylinder over a period, for later analysis in a laboratory - from Haldatec

The Following Technical Papers are from Sentry Equipment Corporation.
3.12 What you Need to Know to Select an Automatic Sampler - Richard Bassett - This article discusses three basic modes and types of automatic samplers and explore the factors that should be considered before selecting a model for your application. It includes a useful application Datasheet.
3.12 Sampling Liquid Petroleum Gas (and other high vapour pressure gas/liquids) - The primary purpose of this technical note is to provide insight into the history and issues related to the sampling of Liquid Petroleum Gas (LPG) and other high vapour pressure liquids and to provide recommendations for accurate, safe and environmentally compliant sampling methods - from Sentry Equipment Corporation.

Existing Process Sampling Methods and New Sampling devices for the Process Industry - Kevin Cook - Sampling is typically a major concern for most plants since product samples must be representative and accurate. Environmental and safety concerns related to sample taking of toxic or hazardous materials are also having a larger impact on the development of sampling devices - From Tyco.