Luck’s proportional pressure reducing types DRE are pilot operated pressure reducing valves. They are used for the reduction of a working pressure.
Proportional pressure reducing valve DRE basically consists of the pilot valve (1) with proportional solenoid (2) main valve (3) with main spool assembly(4), as well as an optional check valve (5).
| Hydraulic | ||
| Max.setting pressure (MPa) | ports A and B | 31.5 |
| port Y | go to tank .no pressure | |
| Max.setting pressure, for port A (MPa) | The same as pressure rating | |
| Min.setting pressure.for port A (MPa ) | Be related to "Q". (see curves) | |
| Linearity (%) | ±3.5 | |
| Repeatability (%) | <±2 | |
| Hysteresis | With quiver ±2.5%Pmax.without quiver ±4.5% Pmax | |
| Fluids | Mineral oil(for NBR seal), Phosphate ester (for FPM seal) | |
| Viscosity range (mm2/s) | 2.8 to380 | |
| Fluid temperature range (℃) | -20 to +70 | |
| Electrical | ||
| Supply voltage | DC | |
| Min.control current (A) | 0.1 | |
| Max.control current (A) | 0.8 | |
| Coil resistance (Ω) | old valve at 20℃ is 19.5, Max.warm valve is 28.8 | |
| Duty | continuous | |
| Max.condition temperature(℃) | 50 | |
| Insulation to DIN 40 050 | IP65 | |
| Associated amplifier | Plug-in connecter | |
| Electrical applifier | VT_2000:40(together provide) | |
Features:
▶Optional max.pressure protecting
▶Optional check valve between A and B
▶Valve used for reducing a working pressure
▶For subplate mounting
▶Valve and electronics from one scurce
Application:
DRE/DREM proportional pressure reducing valve has simple structure, convenient installation and debugging, strong flow capacity, small pressure loss, good repeatability and linearity, and is suitable for occasions with large system flow. It is widely used in machine tools, light industry, metallurgy, shipbuilding, engineering, mining, aerospace and other fields.
Type DRE...
The setting of the pressure in port A is dependent on the voltage present at the proportional solenoids (2).
At rest, with no pressure in port B the spring holds the main spool (4) in its start position. The connection from B to A is closed A start-up jump is, therefore avoided.
The pressure in port A acts via connection on the area of the main spool.
The pilot oil is taken from port A(NS 10) or port B(NS 20,30)and passes through the connection to the constant flow controller, which holds the pilot oil flow constant independent of pressure drops between ports A and B. From the constant flow controller the pilot oil flow passes into the spring chamber, through two connections, via valve seat into the Y port and from there into the drain line.
The pressure required in port A is defined at the relevant amplifier.
Symbols of Proportional Pressure Reducing Valve DRE
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
Tel
