Newsroom
Records of product deliveries, selection methods and experience from the field. Specific problems and specific methods, without the usual industry phrases.
10.312026How We Choose the Topic of a Technical Article: Where the Topics Come FromThe technical department has three fixed inputs when choosing topics: the same question raised again and again on site, the follow-up question asked when test data does not match, and the parameters asked about repeatedly in purchasing and technical discussions. What these three inputs have in common is that someone is stuck at a specific point and cannot make a judgement. What an article covers and what it leaves out is decided by whether the reader can use the information to make that judgement.Company Profile→10.312026304 Stainless Steel Body: When a Complete Custom Build Is Worth ItThe machine is supplied in high carbon steel as standard, and can be built throughout in 304 stainless steel when required. A material upgrade addresses one thing only, corrosion; it does not make the filtration accuracy higher and it does not make the degassing more complete. This article explains the difference between the two steels in salt spray, damp and corrosive media environments, and the three things to confirm before deciding on a custom build.Product Updates→10.312026Ordering Filter Elements with the Correct Model: No Figure in the Specification Can Be Left OutThe most common mistake when ordering filter elements is to give only a category name; the accuracy and the interface then do not match, and it is only when the goods arrive that the element is found not to fit. The five element specifications in common use each correspond to a different accuracy grade and a different interface size, and the 150-500-5 fine filter element is supplied either as a set of 5 or as single pieces. This article matches these five specifications to the positions where they apply, and explains the three items that an order must state in full.Product Updates→10.312026Several Machines Sharing One Vacuum Source: How the Trade-off Works OutA shared vacuum source saves the purchase price of the pump set, the floor space and the foundation, but what is saved is hardware, while what is paid out may be in the vacuum level and in the scope of a fault. The length of the pipework, the number of elbows, the pipe diameter and the number of machines running in parallel together determine whether the working vacuum can still be held steady after the machines are combined. This article sets out these items and gives the conditions under which a shared arrangement holds.Industry News→10.312026How Many Units a Project Needs: The Calculation for Parallel and Series ArrangementsThe most common mistake in model selection is to fix the model first and find reasons afterwards. The order should be: first calculate the annual volume to be treated, then divide it by the flow rate of a single unit to get the minimum number of units, then decide between parallel and series operation, and only last compare the models within the same flow rate range. This article walks through that path with the real flow rates, dimensions and weights of several models, and gives the conditions under which the parallel and the series arrangement each hold.Industry News→10.312026What to Check First After an Overload Trip: A Troubleshooting Sequence Without Opening the MachineResetting straight after the overload protection has tripped usually means it trips again within minutes, because the cause of the overload is still in the machine. This troubleshooting sequence starts by establishing whether the trip came from the overload protection or from the phase-loss and phase-sequence protection, then checks in turn the oil feed rate, the filter element differential pressure, the oil temperature and viscosity, and the three-phase power supply. All of it can be done without stopping and dismantling the machine, and only at the end do you decide whether the machine has to be stopped and opened.Technical Notes→10.312026Where the Temperature Probe Goes: Why One Tank of Oil Can Show Two TemperaturesThe reading on the temperature control panel only represents the position where the probe is fitted; it does not represent the whole tank of oil. Far-infrared heating radiates inwards from the tank wall, so the surface layer heats up first while the centre and the bottom heat up slowly. With the probe fitted in different places, the same tank of oil gives different readings. This article explains how the probe position affects the action of the control loop, and how the continuous range of 45–80 °C should be coordinated with the upper limit of 70 °C used when the water content is high.Technical Notes→10.312026One Sampling Step Can Ruin a Test: Four Pitfalls of On-site SamplingThe testing equipment itself rarely goes wrong; most of the errors happen at the sampling stage: a container with water in it, a sample left standing open, oil that has not been mixed thoroughly, particles hidden at the bottom of the bottle. Any one of them is enough to make the result deviate from the true state of the oil. These four pitfalls hit water content, gas content, breakdown voltage and cleanliness respectively, and not in the same direction. This article sets out the correspondence between the pitfalls and the indicators, and gives a preparation checklist for before and after sampling.Technical Notes→10.312026Should the Tank Be Drained Before Changing the Filter Element: This Step Decides Three Things That FollowWith parallel filter housings, two kinds of rework are easy to run into during an element change: the new element is installed and immediately draws in the sediment at the bottom, or the work area is smeared with residual oil and cannot be reassembled. Draining the tank is not one more process step; it prepares the preconditions for cleaning, assembly and calibration in one go. This article explains the difference in state before and after draining, and why the pressure judgement line and the differential pressure alarm value cannot substitute for each other.Technical Notes→10.312026Can Vacuuming and Oil Filling Be Done at the Same Time: The Order of Two OperationsThe efficiency of vacuum degassing depends on the pressure state of the oil as it enters the tank. Drawing the vacuum first and then filling the oil, compared with filling first and then drawing the vacuum, differs by the time the oil spends at atmospheric pressure, and the whole degassing process is stretched out. This article compares the tank pressure, the oil level condition and the site judgement criteria under the two sequences, and explains why ultimate vacuum and working vacuum must not be treated as the same thing.Technical Notes→10.282026Site Safety Interlocks: Under Which Conditions the Machine Must Refuse to StartAbnormal oil level, over-pressure, phase loss or phase-sequence error, a cabinet door that is not closed, foam overflow: under these conditions the machine must refuse to start rather than only raise a warning. This article sets out what each interlock protects, why it has to be built as a hard interlock, and in what order the machine is reset after an unintended trip on site.Technical Notes→10.262026Three Oils, Three Configurations: Which Filtration Equipment Goes with Insulating Oil, Hydraulic Oil and Lubricating OilDifferent oils have different properties and therefore different contaminant profiles, so equipment selection cannot be based on throughput alone. This article takes the three common oil types — insulating oil, hydraulic oil and lubricating oil — and sets out their main contaminants, the treatment equipment recommended for each, and the acceptance indicator limits that have to be watched.Company Profile→10.202026What a Maintenance Record Should Contain: What a Working Equipment Log Looks LikeAn equipment log goes unused, often because it records only the date and a signature. A log that is genuinely usable needs at least seven fields: equipment number, location, oil type and grade, volume treated per run, cumulative running hours, filter element replacement records, and exceptions with the conclusions drawn. This article explains which specific decision each field answers.Industry News→10.142026Breakdown Voltage: An Indicator You Cannot Conclude From Water Content AloneWater content is only one of the variables that affect insulation. This article explains why breakdown voltage is a combined criterion for the overall withstand capability of an oil sample, how particles, dissolved gases and ageing products pull it down together, and which deviations are most easily introduced during sampling.Technical Notes→10.132026Vacuum Efficiency Drops During Continuous Running: Stop the Machine or NotAfter several hours of continuous running, the vacuum level drifts slowly downward. Is this a fluctuation in the operating condition or an equipment fault? This article gives a step-by-step method of checking five variables — the oil feed rate, the water content of the incoming oil, the oil viscosity, the pump oil condition and the filter element differential pressure — and clearly lists the signals that require the machine to be stopped and those that allow the operating condition to be adjusted and the run to continue.Technical Notes→10.062026Filter Elements Replaced Before Their Time: Four Common Causes of Wasted ConsumablesWhen a filter element has to be replaced before its service life is over, what is wasted is usually more than the price of the element. This article breaks down the four common causes of early failure — the accuracy selected is too fine, the oil inlet stage has no coarse filter, a rising differential pressure is taken as a signal to backwash repeatedly, and different oils are mixed and contaminate the filter medium — and gives, for each, the way to identify it and the corrective action.Technical Notes→10.052026Two-stage and Single-stage Vacuum: What the Structural Difference Actually BringsBoth structures can draw oil into the vacuum chamber, but their separation capability, ultimate vacuum and resistance to a water load are not the same. This article takes apart the structural differences between single-stage and two-stage vacuum, and explains why the ZYD series uses a combination of rotary vane pump and Roots pump.Product Updates→09.282026Five Checks Required After the Machine Is MovedFive items are the ones to recheck after a move: level and vibration isolation, pipework stress and alignment, electrical connections and earthing, vacuum system sealing, and the safety interlocks and protective functions. For each item the article gives a check that the site team can carry out itself and the acceptance criteria, so that the machine is not simply started up after the move.Technical Notes→09.242026Automatic Infrared Foam Removal: The Step That Lets a Vacuum Oil Purifier Run Genuinely UnattendedFoam drawn into the vacuum pump emulsifies the pump oil, and running with water in the oil also drags down the degassing efficiency and the stability of the machine. This article explains how the infrared foam detector and the automatic foam removal solenoid valve work together, which other detections are still needed for unattended operation, and where the limits of this mechanism lie.Product Updates→09.202026Restarting After a Long Standstill: The Items to Recheck Before the Machine Is StartedWhen a machine that has stood unused for a long time is put back into service, the problems often appear together on the first run: the vacuum will not come up, the pump will not turn, the oil temperature will not rise. This article gives a checking order and the criteria for six items — seals, pump oil, the oil condition, pipework, electrical connections and earthing, and heating and temperature control — and explains what no-load method should be used to verify the first start-up.Technical Notes→
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When something on site cannot be judged - the water content will not come down, the breakdown voltage will not rise, the differential pressure across the element climbs too fast - describe what you see and we will give you a way to work through it.