Sectional Directional Valve Series HDS21
Series HDS directional control valves represents a flexible unit construction, the elements of which may be combined into one valve unit as required.
They are available in 8 different sizes, and with parallel, serial, serial/parallel, Load Sensing and Flow Sharing circuitry. In addition, the range includes inlet and intermediate flow control sections with either manual or electro-proportional operators.
Where accurate control of speed and actuator position is needed, the valves satisfy the most complex hydraulic circuit requirements.
HDS21 Standard Features
Number of sections: 1-10
Nominal flow rate: 80 l/min
Max. inlet pressure (P) bar: 290
Max. work port press. (A/B) bar: 320
Fluid temperature: from -20 to + 80°C
Viscosity operating range: from 15 to 75 mm²/s (cSt)
Max contamination level : 21/19/16 – ISO 4406:1999 (NAS 1638 class 10)
Max contamination level for electro-hydraulic applications: 20/18/15 – ISO 4406:1999 (NAS 1638 class 9)