Products Description
The FF-133 series electro-hydraulic servo valve is a linear direct drive flow servo valve with a flow range of 5L/min to 40L/min under a pressure difference of 7MPa. This type of servo valve is directly driven by a linear force motor, without a pilot stage or internal throttling holes. Therefore, it has low leakage, low hydraulic power consumption, strong anti pollution ability, and minimal impact on valve dynamics due to reduced system oil supply pressure. The product uses LVDT valve core position sensors for position closed-loop control, resulting in small hysteresis, high resolution, good repeatability, and high dynamic performance. According to user needs, power-off failure centering or fixed bias can be set to keep the system in a pre-set safe state after unexpected power failure. The control box is designed with an external electrical zero adjustment device, making it more convenient to use. The product shell is made of stainless steel or cast iron, with high structural strength and high pressure resistance. Suitable for steel metallurgy, testing equipment, etc.
Product Features:
● No pilot stage leakage, low leakage, low power consumption
Technical Parameter:
Item | Unit of Measurement | FF-133 Series | ||||
FF-133/5 | FF-133/10 | FF-133/20 | FF-133/40 | |||
Oil Supply Pressure Range | MPa | ≤35 | ||||
Rated Supply Pressure Ps | MPa | 21 | ||||
bar | 210 | |||||
psi | 3050 | |||||
Rated Flow Qn(±10%) △PN=7MPa | L/min | 5 | 10 | 20 | 40 | |
gpm | 1.3 | 2.6 | 5.3 | 10.6 | ||
Hysteresis Loop | % | ≤0.2 | ||||
Resolution Ratio | % | ≤0.1 | ||||
Linearity | % | ≤7.5 | ||||
Symmetry | % | ≤10 | ||||
Pressure Gain | % | 25~80 | ||||
Internal Leakage | L/min | ≤0.15 | ≤0.30 | ≤0.60 | ≤1.20 | |
gpm | ≤0.04 | ≤0.08 | ≤0.16 | ≤0.32 | ||
Null Bias | % | ≤±2 | ||||
Overlap | % | ≤±2.5 | ||||
Null Shift With Temperature (Temperature changes by 55 ℃ every time) |
% |
≤1.5 | ||||
Frequency Response | Amplitude Bandwidth (-3dB) | Hz | ≥50 | |||
Phase Bandwidth (-90°) | Hz | ≥50 | ||||
Step Response |
ms | ≤12 | ||||
Max Power Consumption | W | 50 | ||||
Net Weight | kg | 2.8 |