Product Description

Rexroth pressure relief valve( DB/DBW type pressure control valve is a pilot type overflow valve. )
Sizes 10 to 32
Component series 5x
Maximun operating pressure 350 bar
Maximun flow 650L/min

RE 25802/10.05
Relpaces:03.03

Type DB and DBW

Features

For subplate mounting:
Porting pattern to ISO 6264-AR-06-2-A(Size 10)
ISO 6264-AS-08-2-A (size 25),
ISO 6264-AT-10-2–A (size 32)
For threaded connection
For installation into manifolds
4 adjustment elements for pressure setting, optional:
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale
5 pressure stages
Solenoid operated unloading via built-on directional spool
valve or directional poppet valve
Heavy duty solenoid
Explosion-protected solenoid (on enquiry)
Switching shock damping, optional (only type DBW)
Further information:
High-performance directional valves RE 23178 and RE 22058
Subplates RE 45064

W----With built-on directional valve
30---- Ordering code
B 2)---- Normally open
2---- Sleeve with hexagon and protective cap
N---- With main spool Ø28 mm (only for size 32)
5X---- Component series 50 to 59 (50 to 59: unchanged installation and connection dimensions)
315---- Pressure setting up to 315 bar
E---- Type-tested safety valve according to PED 97/23/EC
R12 6)---- Orifice Ø 1.2 mm in channel B of the directional valve
K4 2; 5)---- Individual connection with component plug to DIN EN 175301-803
N9---- With concealed manual override (standard)
G24---- 24 V DC
6E---- With directional spool valve (high-performance valve 4)) – up to 350 bar set pressure

DB solenoid valve to control the pressure in the system and to make unloading at any time.
A hydraulic pressure control valve. Hydraulic equipment in the main role of the overflow from the constant pressure regulator, unloading systems and safety protection.
Constant pressure overflow effect: the quantitative pump throttle system, the quantitative pump to provide a constant flow. When the system pressure increases, the traffic demand will decrease. At this point relief valve open, so that excess flow back to tank overflow, inlet pressure relief valve to ensure that the pump outlet pressure constant (often with the pressure fluctuations valve port open).
The role of regulator: the way back to the oil spill in series, back pressure relief, increased steadily moving parts.
Unloading systems: remote port relief valve in series with the solenoid valve spill small flow when the solenoid is energized, the relief valve remote control port to tank, then pump unloading. In this case as unloading relief valve.
A security role: when the system is working properly, the valve closes. Only the load exceeds a predetermined limit overflow opening (system pressure exceeds the set pressure), the overload protection, the system pressure does not increase (usually makes the set pressure relief valve system maximum operating pressure higher than 10% to 20% ).
Usually there are practical applications: for unloading valve, pressure regulator for the remote, for high and low pressure multi-stage control valve for sequence valve, used to generate back pressure (string in the oil return path).
There are two general relief structure: 1, direct acting relief valve. 2, pilot relief valve.
The main requirement for relief valve: regulating range, small deviations regulator, pressure runout small, sensitive, large overload capacity, low noise.

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