TYA-50 and TYA-100 are offered in two control modes: automatic and semi-automatic. The two words sit on the same line in the specification table, but they answer two different questions: when the filter element needs a backwash, does the machine judge it and act on its own, or does it stop and wait for a person to confirm? The difference is not on the panel; it is on the night shift, in the maintenance window, on a site where only one person is on duty.
What the backwash step actually solves
The TYA series is fitted with automatic backwash filter elements. While the oil travels through the filtration stage, particles are continuously held back in the filter media and the differential pressure across the element rises accordingly. As the differential pressure keeps rising, the flow is held back and the processing capacity falls with it. Backwashing works by reversing the flow, carrying the captured particles out and returning the media to a clean state. This is the step that lets the element keep working.
What has to be kept apart is this: automatic backwash answers what to do when the element is blocked, not whether the element should keep being used. The operating conditions of the TYA state it plainly: pressure >0.3 MPa requires cleaning and element replacement. Once the differential pressure reaches that point, backwashing is no longer enough to restore the element. Backwashing is the routine means of holding the element in condition; replacing the element is how the end of its service life is handled.
Where the boundary between automatic and semi-automatic lies
In automatic mode, when the element reaches the set backwash condition, the machine carries out the sequence by itself: it stops normal filtration, runs the backwash, discharges the captured material, and returns to normal filtration. None of that sequence needs a person on site to confirm it, and the machine can complete the cycle on its own while it is running. What it changes is the way the work is done: the stretch of time in which an operator had to walk to the machine at regular intervals, look at the differential pressure, decide whether to wash and operate it by hand is now absorbed by the machine itself.
In semi-automatic mode the machine gives the same signal at the same point, but the backwash step is only executed once an operator has come to the site and confirmed it. The machine is responsible for judging and warning; the decision stays with the person. This design answers a different set of needs: backwashing itself takes a period of machine time, and processing is interrupted while it runs; batches are mixed and the operator prefers to take the oil being processed and the shift schedule into account before deciding whether to wash; or the site rules require that work affecting the filtration stage must be confirmed by a person on site and recorded.
Choose by site conditions, not by preference
The two modes correspond to different site conditions, and the decision rests on three things in the main: whether anyone is on site while the machine is running, how long the stretch of continuous operation is likely to be, and whether the oil being processed changes often.
- Long stretches of continuous operation, thin cover on site, or frequent backwash triggering: automatic mode fits better, because no one has to be sent to the machine for every backwash.
- Mixed batches, frequently changing oil, or site rules that require work on the filtration stage to be confirmed by a person on site and recorded: semi-automatic mode fits better, and the judgement stays with the person who knows this batch of oil.
- When several machines have to be covered, first work out the backwash trigger frequency from the actual operating shifts of each machine, and only then decide which mode is worth the investment.
- Whichever mode is chosen, the line at pressure >0.3 MPa requiring cleaning and element replacement has to be planned separately; it does not change with the control mode.
| Item | TYA-50 | TYA-100 |
|---|---|---|
| Flow rate | 2000 L/h | 4000 L/h |
| Filtration accuracy | ≤1~5 μm | ≤1~5 μm |
| Control mode | Automatic / semi-automatic | Automatic / semi-automatic |
| Working vacuum | approx. -0.08 MPa | approx. -0.08 MPa |
| Temperature control | 45–80 °C | 45–80 °C |
| Pressure >0.3 MPa | Cleaning and element replacement required | Cleaning and element replacement required |
| Power supply | Three-phase 380V / 50Hz | Three-phase 380V / 50Hz |
| Dimensions | 1500×800×1600 mm | 1900×1000×1900 mm |
| Machine weight | approx. 480 kg | approx. 720 kg |
The parameters that do not depend on the control mode
The control mode answers who handles the backwash step; the other conditions of the machine hold whichever mode is chosen: working vacuum approx. -0.08 MPa, temperature control range 45–80 °C with the upper limit pulled down to 70 °C when the water content of the oil is high; ambient temperature -20–45 °C, and altitude affects the vacuum level; the filtration accuracy is selectable between ≤1~5 μm, and which step of that range is used depends on the condition of the oil and the target cleanliness. These parameters are the same set in both modes.
The difference between automatic and semi-automatic is who presses the button when the element needs washing, not which machine filters the oil more cleanly.
