Danfoss 155U3905
Proportional Valve
Electronic Speed Control EHS

Danfoss is a Danish multinational company, based in Denmark that engineers technologies that empower the world of tomorrow to build a better future. Energy efficient technologies empower smart communities and industries to create healthier and more comfortable climates in our buildings and homes and to supply more food with less waste. The Company develops and manufactures district heating and cooling, power modules, centrifugal and reciprocating compressors, high pressure pumps, condensing units, refrigeration and air conditioning, motors, and other related products. Danfoss serves customers worldwide.

The Danfoss electronic speed control EHS takes up an electric pulse signal related to rotational movement. The pulse signal is converted into a proportional signal that is applied to control the speed of a hydraulic motor.

EHS controls the flow from the proportional valve, in relation to the frequency of the electric signal from a tachometer pulse source. EHS contains two potentiometers, used to set the frequency necessary to give maximum movement of the proportional valve and compensate for leakage in the hydraulic system itself.

When a frequency is applied to EHS, the proportional valve immediately functions to give the corresponding flow. To ensure linearity between frequency and flow, EHS compensates for the progressive flow characteristic of the proportional valve.

Technical Specifications
Manufacturer: Danfoss
Part Number: 155U3905

The purchaser of these items must ensure that they are satisfactory for use in the application for which they are intended.
No responsibility can be accepted by the manufacturers if any products are incorrectly or inadequately fitted. Goods may not be exact to image shown.