Linear Position Transducers
A linear position transducer reports the position of a piston or carriage to the controller as an electrical signal. Two figures drive the selection: the measuring length, which has to cover the usable stroke, and the output signal the controller expects. Both are encoded in the type designation and repeated in the article technical data.
FAQ
Frequently Asked Questions
How do I determine the right measuring length?
The measuring length has to cover the usable stroke in full. Measure the travel between end positions and pick the next larger measuring length offered. Too short a measuring length stops delivering a usable signal near the end of stroke.
Which output signal suits my controller?
That follows the controller input, not the cylinder. Analogue current and voltage signals as well as digital interfaces are common. The signal an article delivers is stated in its technical data.
Can an existing cylinder be retrofitted?
Only where piston and rod carry a through bore for the probe. Without it, the transducer is mounted externally or the cylinder is exchanged for a prepared version.
More ranges
Counterbalance Valves
During lowering the counterbalance valve does the braking work, so the lowering speed is set by the control system and not by the load. If that braking action is missing or the valve is wrongly sized, the load sags on start-up and the lowering motion turns jerky.
Bladder Accumulators
A bladder accumulator is a hydropneumatic pressure vessel: inside the steel shell, an elastic bladder separates the nitrogen-precharged gas side from the oil side. When system pressure rises the accumulator takes in oil, and when it falls it gives the oil back. That is how you store energy, damp pulsations, absorb pressure surges or compensate for leakage losses. Four figures narrow the selection: nominal volume, permissible working pressure, port and the elastomer of the bladder, which has to suit the medium and the temperature. Typical nominal volumes range from about 4 to 50 litres with pressure ratings up to 350 bar. PTS supplies bladder accumulators from Parker Olaer, HYDAC and Bosch Rexroth from stock, plus mounting clamps, seal kits and replacement bladders, so an accumulator can be repaired instead of replaced outright.
Heavy-Duty Cylinders
PTS supplies hydraulic heavy-duty cylinders from stock at 50 to 150 tonnes of nominal force, with strokes of 50 to 300 mm, single- and double-acting in a compact design. Forces and strokes outside that range are available as further versions on request.
Flange Spreaders
Flange spreaders act on a seized flange joint. It is opened for maintenance or assembly work. The gap has to open evenly, or the sealing face is damaged. How much spreading force is needed depends on the size of the flange and how tightly it is seized.
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