1. Air Bleeding
In order to ensure stable
control, loosen the air vent and bleed air from the valve before
2. Manual Adjusting Screw
the initial adjustment or when there is no input current to the valve
due to an electrical problem or some other reason, pressure or flow
rate can be increased by rotating the manual adjustment screw clockwise
(rightward). Normally, this adjusting screw should be returned
completely to its original position and secured with the lock nut.
3. Drain Port
control pressure is increased by drain port back pressure, so be sure
to connect the drain port directly to the fluid tank at a point that is
below the oil surface.
4. Safety Valve
safety valve without an electro-hydraulic proportional pilot relief
valve, safety valve pressure is set to minimum pressure 35.7 kgf/cm2
(3.5Mpa max.) In the case of a safety valve with an electrohydraulic
proportional pilot relief valve, the safety valve setting pressure is
set to the minimum adjustment pressure plus 15.3 kgf/cm2
(1.5Mpa). When actually using the valve, adjust in accordance with
hydraulic circuit pressure.
Relief Flow Rate During Pressure Control
Setting pressure can
become unstable when the relief flow rate to the valve's T port is
small. Because of this, use a relief flow rate of at least 10 l/min
with a nominal diameter of 03 or 06.
6. Valve Mounting Orientation
electro-hydraulic proportional pilot relief valve main valve is mounted
on a vertical surface with the pilot relief valve part facing downwards
make it difficult to bleed air from the pilot relief valve. Because of
this, you should not use this type of mounting orientation.
Accessories (Valve Mounting Bolts)
8. Use an
operating fluid that conforms to the both of the following.
Oil temperature: -20 to
70°C. Viscosity: 12 to 400 mm2/s.
The recommended viscosity
range is 15 to 60 mm2/s.