Differential Scale Loop DSL
Investigation of salt deposits in pipelines
The Differential Scale Loop DSL is an automated laboratory device that investigates the behaviour of aqueous solutions with regard to the formation of crystalline deposits such as salts and, in particular, lime. To do this, the DSL simulates conditions in the field and in pipework systems such as oil pipelines, water pipes, heat exchangers in industrial plants or geothermal plants at pressures of up to 400 bar and temperatures of up to 300 °C. The differential scale loop is used to test scale inhibitors, scale inhibitors or scale removers, among other things.
The DSL from PSL is the best-selling scale loop in the world. It has been setting new technical standards in scale testing for 20 years. It is used successfully on all five continents.
All important features of DSL
- Small sample volumes
- Automated tests with decreasing inhibitor concentrations
- Automated scale detection and cleaning procedure
- Exchangeable model pipeline
- Self-sufficient test runs possible overnight
Application Areas of Differential Scale Loop
The Differential Dynamic Scale Loop simulates the conditions in pipework and production systems at temperatures up to 300 °C (572 °F) and pressures up to 400 bar (5,800 psi). It can be used for all solutions with crystalline deposits, e.g. carbonate, sulphate, iron and other deposits, sugar, salt from seawater and geothermal water.
Observation of crystalline deposits like salts or scale in pipelines
Testing inhibitors, antiscalants or scale removers
Testing additives for water treatment and water purification
Develop and optimise scale inhibitors
Investigate hardness stabilisers for aqueous solutions
Quality control
Short Story about Differential Scale Loop
Right from the start: The new industry standard
Until the market launch of the differential scale loop from PSL Systemtechnik, there were only unsatisfactory scale loops with two HPLC pumps on the market for the customer. Our DSL was the first commercial device with three HPLC pumps. This enabled faster, more accurate and, above all, automated measurements. This novel approach had quickly established itself as the industry standard and almost replaced two-pump systems.
We were able to maintain our pioneering position through continuous further development of the Differential Scale Loop. The software in particular is characterised by an unrivalled range of functions and a high degree of measurement automation, which leads to significantly shorter project lead times.
IN USE WORLDWIDE
Used by Leading Labs
Concept for a long lifespan
Only high-quality and robust materials used
Our well thought-out concept for the differential scale loop leads to a long service life and protects your investment. Only high-quality and robust components from leading manufacturers, primarily from Germany, are used. All components exposed to heat are made of Monel to ensure greater resistance to corrosion from the hot salt solutions. All safety-relevant and expensive components are protected twice, via software limits and additionally mechanically.
Differential Dynamic Scale Loop: Your benefits
Automatic detection of crystalline deposits
Software-controlled testing and cleaning processes
Automated determination of the optimum inhibitor concentration
Extreme durability ensures a secure investment
Cost-saving due to small sample volumes
Interchangeable model pipeline for further tests
Many expansion options
Developed together with users
The structure of the differential scale loop is modular. The basic device can be easily extended and later retrofitted by the user if required.
The expansion options include:
- Sample extension for more sample volumes, different inhibitor tests in succession or scale-on-scale tests
- Flow meter for additional control of the flow rate
- pH probe and EC probe to determine further data
- Sample chamber for obtaining scale samples for further analyses or using filters for filter blocking tests
- Version in Hastelloy for maximum corrosion resistance with very corrosive samples
Simply adapt the test conditions
Interchangeable test capillary for different processes
The test capillary is made of stainless steel as standard and therefore simulates most applications. Different lengths and internal diameters as well as different materials such as copper, aluminium or Hastelloy are available to simulate other process conditions. The capillary can be exchanged quickly and easily.
In order to simulate a wide range of process conditions, measurements can be carried out at temperatures of up to 300 °C and, depending on the model, pressures of up to 400 bar can be built up. The flow rate can also be varied over a wide range.
Online Demo with Differential Dynamic Scale Loop DSL
During the product demonstration, you will gain many insights into how it works. You can follow the measuring process live and then discuss your questions with our experts.
The most important facts at a glance
| Pressure Range | 3,4 bar .. 45 / 172 / 400 bar (49 psi .. 650 / 2,500 / 5,800 psi) |
| Temperature range | +30 °C .. +300 °C (86 .. 572 °F) |
| Flow rate |
Single pump: 0.1 .. 10 ml/min Total flow: max. 30 ml/min |
| Model pipeline |
Length: 2 m, Inner Ø: 0.75 mm Material: stainless steel many options available |
| Corrosion resistance | Hastelloy optionally |
Differential Dynamic Scale Loop data sheet
In the product data sheet you will find the exact specification as well as many data and options to help you decide on the Differential Scale Loop.
WHY PSL?
We set new laboratory standards with our instruments
We have been developing, manufacturing and selling innovative laboratory instruments specifically for Flow Assurance for 25 years, setting new standards in the laboratory for professionals. We have been awarded innovation prizes for this. Our export quota of 90 % earned us the Export Oscar of Northern Germany.
PSL stands for reliability, quality and innovation. We are proud that the Big Five in the industry are among our satisfied customers.
WHAT WILL BE YOUR BENEFIT?
Reliable, high-quality instruments for your success
SAVE TIME IN EVERYDAY LAB WORK
with automated test cycles, cleaning procedures and easy-to-clean parts.
EASY TO USE
with a user-friendly, high-quality design for simple, correct and safe handling.
LONG LIFETIME MADE IN GERMANY
thanks to the sophisticated and robust design as well as the high-quality materials and manufacturing.
TRUSTED SERVICE - WORLDWIDE
with our online support, maintenance contracts and on-site service. We guarantee 20 years of repair service.
MEASURE LIKE INDUSTRY LEADERS
with innovative and advanced instruments, you can measure future-proof like the leading laboratories.
PLEASURE TO MEASURE
Our instruments make work a pleasure. They were developed together with the users.
