Huade’s DREM type pilot-operated electromagnetic proportional pressure-reducing valve features a cone valve structure, which can steplessly reduce the pressure in a certain circuit based on the electrical signal. Additionally, this proportional pressure reducing valve DREM is equipped with a maximum pressure protection device, ensuring the system is protected from damage caused by unexpected high pressure.
| 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:
Proportional Pressure Reducing Valve DREM is widely used in multiple industrial sectors such as the petroleum industry, chemical industry, machinery manufacturing, aerospace, machine tools and light industry, shipbuilding, and mining, due to its high precision and stability.
The valve types DRE and DREM are pilot operated pressure reducing valves. They are used for the reduction of a working pressure.
The valves basically consist 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).
Type DREM.
In order to ensure that excessive hydraulic pressures ( hydraulic safety) do not occur due to unpermissibly high control currents at the proportional solenoid that automatically cause
higher pressure in port A, a spring loaded maximum pressure relief valve, for maximum pressure safety, can be optionally installed if required.
Note: When the pressure fluid flow from port A to port B via the check valve (5), the parallel flow of oil via Y to tank affects the deceleration process of the actuator attached to port A if this
is being decelerated by a throttle valve in port B (e. g. proportional directional valve). Under such circumstances, the third flow direction A to Y is not suitable for limiting the maximum pressure in port A.
Symbols of Proportional Pressure Reducing Valve DREM
Address
27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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