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Servo valves


Cheltec designs and manufactures servo drives on the basis of original servo valves and proportional directional control valves, designed by the Cheltec specialists. The application of such units allows using industrial controllers for controlling hydraulic actuators (hydraulic cylinders), thus meeting the requirements of state-of-the-art production technology.


Electrohydraulic fluid amplifiers (servo valves) are the devices which transform input electrical signal (current) into output hydraulic signal (flow, pressure) proportionally. They serve as links between low-power electrical controllers and hydraulic actuators, and are used in the systems of automatic adjustment, which are now increasingly applied in metallurgical and machine-building productions.

Cheltec servo valves benefits:

  • low sensitivity to working fluid contamination due to the absence of close gaps;
  • high linearity of pressure and flow ratings in the working area;
  • high dynamic response.

Specifications


Description

01 SK
10.3.14.09.2

02 SK
6.3.14.02.2

05
  SK 6.3.14.02.2

SK design

Single-stage

Control procedure

Jet-pipe control from electromechanical transducer

A/B/T/P ports diameter, mm

12/12/13.5/12

8

4/4/6.5/6.5

Inlet pressure, MPa:
- max
- nominal


21
16

Drain pressure, MPa:
                                       -  max
                                       - nominal

3
1

Nominal flow at valve pressure differential Δ=7 MPa, l/min

26

6

6

Feeding flow at inlet and drain nominal pressure differential, l/min

45

10

10

Max pressure hysteresis, %

5

Max zero shift, %

3

Frequency at 90º phase response, Hz

25

Working fluid

Mineral oil

Working fluid temperature, º

0÷60

Working fluid viscosity at t=50º, cSt

5÷100

Working fluid contamination class according to GOST 17216-2001
-recommended
-permissible


12
13


10
12


12
13

Nominal control current range, mA

±25

Resistance of two tandem coils, Ohm

230±10

Mounting position

Optional

Weight, kg

4

2.6

4




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