Артикул: RX7499
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Pressure relief valve (pilot control valve) (Z)DBT/DZT
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Description
- Size 6
- Component series 1X
- Maximum operating pressure 350 bar
- Maximum flow 3 l/min
Features
- Direct operated valves for limiting a system pressure
- Use as pilot control valve
- For subplate mounting and control panel design
Product description
Pressure relief valves of type DBT are remote control valves with seat design and are used for limiting a system pressure.
The setting is completed manually, via the adjustment type (4).
The valves basically consist of the housing (1), the valve poppet (2) and the related valve seat (3).
In the unloaded position, the valve poppet (2) pushes onto the valve seat (3) and blocks the connection between P and T connection.
If the hydraulic force equals the force set at the adjustment type (4), the valve controls the set pressure.
By lifting off the valve poppet (2) from the valve seat (3), the excessive hydraulic fluid may flow off from P to T.
With completely unloaded spring (5), the minimum pressure of 3 bar (spring preload force) will settle.
These valves are basically used as pilot control valves for the indirect control of larger flows.
Type DBT-XP2-1X
Type code
Ordering code, symbols
| Type | Material number | Examples of application | Symbols |
| DBT–G1–1X/160 | 0 811 104 007 | For control panel |  |
|
DBT–G1–1X/315 |
0 811 104 013 | ||
| DBT–G7–1X/160 | 0 811 104 021 | ||
|
DBT–XP8–1X/160 | 0 811 104 100 | Sandwich plate for subplate mounting | |
| DBT–XP8–1X/315 | 0 811 104 101 | ||
| DBT–XP2–1X/160 | 0 811 104 102 | ||
| DBT–XP2–1X/315 | 0 811 104 103 | ||
| DBT–XP7–1X/160 | 0 811 104 104 | ||
| DBT–XP7–1X/315 | 0 811 104 105 | ||
| DBT–XP3–1X/160 | 0 811 104 106 | ||
| DBT–XP3–1X/315 | 0 811 104 107 | ||
| DBT–XP1–1X/160 | 0 811 104 108 | ||
| DBT–XP1–1X/315 | 0 811 104 109 | ||
| ZDBT–XP8–1X/160 | 0 811 104 110 | Sandwich plate for subplate mounting | |
|
ZDBT–XP8–1X/315 | 0 811 104 111 | ||
|
ZDBT–XP2–1X/160 | 0 811 104 112 | ||
| ZDBT–XP2–1X/315 | 0 811 104 113 | ||
| ZDBT–XP7–1X/160 | 0 811 104 114 | ||
| ZDBT–XP7–1X/315 | 0 811 104 115 | ||
| ZDBT–XP3–1X/160 | 0 811 104 116 | ||
| ZDBT–XP3–1X/315 | 0 811 104 117 | ||
|
ZDBT–XA8–1X/160 | 0 811 104 118 | For subplate mounting |  |
| ZDBT–XA8–1X/315 | 0 811 104 119 | ||
| ZDBT–XA2–1X/160 | 0 811 104 120 | ||
| ZDBT–XA2–1X/315 | 0 811 104 121 | ||
| DZT–XB2–1X/315 | 0 811 104 123 | Pressure switch valve for subplate mounting |  |
|
DZT–XB2–1X/60 | 0 811 104 124 | ||
|
DZT–XA2–1X/60 | 0 811 104 125 |  | |
| DZT–XA2–1X/160 | 0 811 104 126 | ||
| DZT–XA2–1X/315 | 0 811 104 127 |
Technical data
general
| Size | 6 | |
| Weight | kg | 2 |
| Installation position | any | |
| Ambient temperature range | °C | -20 … +70 |
| Storage temperature range | °C | -20 … +80 |
hydraulic (measured with HLP 46; ϑ Oil = 40 °C ±5 °C, ν = 35 mm2/s)
| Size | 6 | ||
| Maximum operating pressure | Port P | bar | 350 |
| Maximum set pressure | Pressure rating 60 bar 1) | bar | 60 |
| Pressure rating 16 bar | bar | 160 | |
| Pressure rating 315 bar | bar | 315 | |
| Pressure rating 350 bar | bar | 350 | |
| Minimum set pressure | bar | 3 | |
| Return flow | Port T | separate and depressurized to the tank | |
| Maximum flow | l/min | 3 | |
| Hydraulic fluid | Mineral oil (HL, HLP) according to DIN 51524, other hydraulic fluids on request | ||
| Hydraulic fluid temperature range | °C | -20 … +80 | |
| Viscosity range | mm²/s | 15 … 380 | |
| Maximum admissible degree of contamination of the hydraulic fluid 2) | Class 20/18/15 according to ISO 4406 (c) | ||
| Hysteresis (deviation from the max. set pressure) | % | < 5 | |
| Pilot oil volume (Vx) (only pressure switch valves) | cm³ | 0.5 | |
| 1) | only possible with type DZT |
| 2) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
(For applications outside these values, please consult us!)
Diagrams/characteristic curves
Δp = f (qV)
(measured with HLP46, ϑOil = 40 ±5 °C), ν = 35 mm2/s)
Dimensions
Type DBT-G1-1X/...
Dimensions in mm
| 1 | Hand wheel |
| 2 | Rotary knob |
| 3 | Valve mounting bores |
| 4 | Pressure gauge connection |
| 5 | Lock nut |
Valve mounting screws (separate order)
4 hexagon socket head cap screws M6,
screw length as required
Type DBT-X... Type ZDBT-X...
Dimensions in mm
| 1 | Name plate or 2nd flange surface |
| 2 | Adjustment type |
| 3 | Lock nut |
| 4 | Valve mounting bores |
| 5 | O-rings Ø9.25 x 1.78 mm (ports P, T) |
| 6 | Machined valve contact surface; Porting pattern according to ISO 4401-03-02-0-05 Subplates see data sheet 45052 |
Valve mounting screws (separate order)
- type DBT
4 hexagon socket head cap screws ISO 4762-M5x50-10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 – 0.14);
tightening torque MA = 7 Nm ±10 %
or
4 hexagon socket head cap screws ISO 4762-M5x50-10.9
(friction coefficient μtotal = 0.12 – 0.17);
tightening torque MA = 8.9 Nm ± 10%
- type ZDBT
4 hexagon socket head cap screws ISO 4762-M5-10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 – 0.14);
tightening torque MA = 7 Nm ±10 %
or
4 hexagon socket head cap screws ISO 4762-M5-10.9
(friction coefficient μtotal = 0.12 – 0.17);
tightening torque MA = 8.9 Nm ± 10%
Screw length as required
Type DZT-X...
Dimensions in mm
| 1 | Name plate |
| 2 | Adjustment element |
| 3 | Lock nut |
| 4 | Valve mounting bores |
| 5 | Pressure gauge connection for pilot pressure X, G1/4 |
| 6 | Pressure gauge connection for system pressure A, G1/4 |
| 7 | O-rings Ø10 x 1.5 mm (ports P, A, B, T) |
| 8 | Machined valve contact surface; Porting pattern according to ISO 4401-03-02-0-05 Subplates see data sheet 45052 |
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762-M5x50-10.9-flZn-240h-L
(friction coefficient μtotal = 0.09 –0,14);
tightening torque MA = 7 Nm ± 10%
or
4 hexagon socket head cap screws ISO 4762-M5x50-10.9
(friction coefficient μtotal = 0.12 – 0.17);
tightening torque MA = 8.9 Nm ± 10%
Screw length as required
Examples of application
Downloads
 | Pressure relief valve (Pilot control valve) Data Sheet | RE25724 | 2010-03-01 | English | PDF | 1.1MB Product Groups: Direct operated Type (Z)DBT/DZT |
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