DB 20-2-5X/200
Rexroth
R900590768
用于底板安装。
油口布置符合ISO 6264-06-09（NG10）、ISO 6264-08-13（NG25）及ISO 6264-10-17（NG32）。
用于螺纹连接。
螺纹插装阀结构。
可选四种压力调节方式：旋钮；带六角及保护帽的调节套；带刻度的可锁定旋钮；带刻度旋钮。
五种压力等级。
防腐蚀结构。
DB 型压力阀为先导式溢流阀，用于限制工作压力。
DB溢流阀主要由带主阀芯插装件（3）的主阀（1），以及带压力调节元件的先导阀（2）组成。
P通道压力作用于主阀芯（3），并经带喷嘴（4）、（5）的控制管路（6）、（7）作用于其弹簧侧及先导阀（2）的球（8）。P通道压力超过弹簧（9）设定值时，球（8）克服弹簧开启，压力信号由P经管路（10）、（6）内部传递。主阀芯弹簧侧油液经管路（7）、喷嘴孔（11）及球（8）流入弹簧腔（12）。随后，DB型经管路（13）内部回油，DB…Y型经管路（14）外部回油。喷嘴（4）、（5）在主阀芯处形成压降，使P至T接通，油液在维持所设工作压力的同时由P流至T。
溢流阀可通过X口（15）卸荷或切换至另一压力，即第二压力等级。
01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | |
DB | 5X | / | * |
01 | Pressure relief valve | DB |
02 | Without directional valve | no code |
03 | Pilot-operated valve (complete) | no code |
Pilot control valve without main spool insert (do not enter any size) | C | |
Pilot control valve with main spool insert (enter size 10 or 30) | C | |
Pilot control valve without main spool insert for subplate mounting (do not enter any size) | T 1) | |
04 | Size 10 | |
Subplate mounting "no code" | 10 | |
Threaded connection "G" | 10 (G1/2) | |
Size 16 | ||
Threaded connection "G" | 15 (G3/4) | |
Size 25 | ||
Subplate mounting "no code" | 20 | |
Threaded connection "G" | 20 (G1) | |
Threaded connection "G" | 25 (G1 1/4) | |
Size 32 | ||
Subplate mounting "no code" | 30 | |
Threaded connection "G" | 30 (G1 1/2) | |
05 | Without directional valve | no code |
Type of connection | ||
06 | Subplate mounting or cartridge valve | no code |
For threaded connection | G | |
Adjustment type for pressure adjustment | ||
07 | Rotary knob (not for version "C" and "T") | 1 |
Sleeve with hexagon and protective cap | 2 | |
Lockable rotary knob with scale | 3 2) | |
Rotary knob with scale | 7 | |
08 | Main spool Ø24 mm (all sizes) | – |
Main spool Ø28 mm (only for NG32) | N | |
09 | Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions) | 5X |
10 | Set pressure up to 50 bar | 50 |
Set pressure up to 100 bar | 100 | |
Set pressure up to 200 bar | 200 | |
Set pressure up to 315 bar | 315 | |
Set pressure up to 350 bar | 350 | |
Pilot oil flow | ||
11 | External pilot oil supply, internal pilot oil return | X 3) |
Internal pilot oil supply, external pilot oil return | Y | |
Pilot oil supply and pilot oil return external | XY 3) | |
12 | Standard version | no code |
Valve for minimum cracking pressure (not for versions "without main spool insert" and not suitable for mutual relief) | U 4) | |
13 | Without switching shock damping | no code |
14 | Without directional valve | no code |
15 | Without directional valve | no code |
16 | Without manual override | no code |
Electrical connection | ||
17 | Without directional valve | no code |
18 | Without directional valve | no code |
Corrosion resistance | ||
19 | None | no code |
Improved corrosion protection (240 h salt spray test according to EN ISO 9227) | J3 5) | |
Seal material | ||
20 | NBR seals | no code |
FKM seals | V | |
Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | ||
Equipment Directive | ||
21 | Without type-examination procedure | no code |
Type-examination tested safety valve according to Pressure Equipment Directive 2014/68/EU | E | |
22 | Further details in the plain text | * |
| 1) | DBT corresponds to DBC, however with closed central bore |
| 2) | H-Key with material no. R900008158 is included in the scope of delivery. |
| 3) | Not with version "DBC" |
| 4) | Only possible up to pressure rating 315 bar |
| 5) | Only version "2", however without protective cap |
(Component series 5X according to Pressure Equipment Directive 2014/68/EU)
NG | Type designation | Component marking | Maximum flow qVmax in l/min with pilot oil return | Set response overpressure p in bar | |
external "Y" | internal "–" | ||||
10 | | TÜV.SV.▢ – 851.12.F.G.p | 170 230 230 230 | 130 200 200 200 | 30 ... 60 61 ... 110 111 ... 210 211 ... 350 |
25 | | TÜV.SV.▢ – 852.22.F.G.p | 250 270 420 450 | 180 210 320 400 | 30 ... 60 61 ... 110 111 ... 210 211 ... 350 |
32 | | TÜV.SV.▢ – 853.32.F.G.p | 600 600 650 700 | 225 340 540 580 | 30 ... 60 61 ... 110 111 ... 210 211 ... 350 |
1 | For subplate mounting | no code |
For threaded connection | G | |
Adjustment type for pressure adjustment | ||
2 | Hand wheel (pressure adjustment sealed, unloading or setting of a lower response pressure possible!) | 1 |
With sealed protective cap (no adjustment/unloading possible) | 2 | |
Pressure | ||
3 | To be entered by the customer, e.g. pressure adjustment ≥ 30 bar and possible in 5 bar steps. | e.g. 150 |
Pilot oil flow | ||
4 | Pilot oil supply internal, pilot oil return internal | no code |
Pilot oil supply internal, pilot oil return external (Recommendation) | Y 1) | |
5 | NBR seals | no code |
FKM seals | V | |
▢ | Value entered at the factory | |
| 1) | Pilot oil supply external "X" not possible |
Size | 10 | 16 | 25 | 32 | ||||
| DB.. 15 | DB.. 20 | DB.. 25 | ||||||
Weight | Subplate mounting | DB... | kg | 2.6 | - | 3.5 | - | 4.4 |
DBC... | kg | 1.2 | ||||||
DBC 10 or 30 ... | kg | 1.5 | ||||||
Threaded connection | DB...G | kg | 5.3 | 5.2 | 5.1 | 5 | 4.8 | |
Installation position | any | |||||||
Ambient temperature range | NBR seals | °C | -30 … +80 | |||||
FKM seals | °C | -15 … +80 | ||||||
Minimum stability of the housing materials | Housing materials are to be selected so that there is sufficient safety for all imaginable operating conditions (e.g. with regard to pressure resistance, thread stripping strengths and tightening torques). | |||||||
Size | 10 | 16 | 25 | 25 | 32 | ||
Maximum operating pressure | Port P | bar | 350 | ||||
Port X | bar | 350 | |||||
Port T | bar | 315 | |||||
Maximum counter pressure | Port Y (DC solenoid) | bar | 315 | ||||
Minimum set pressure | flow-dependent, see "characteristic curves" | ||||||
Maximum set pressure | bar | 50 100 200 315 350 | |||||
Maximum flow | Subplate mounting | l/min | 250 | - | 500 | - | 650 |
Threaded connection | l/min | 250 | 500 | 650 | |||
Hydraulic fluid | see table | ||||||
Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 | ||||
FKM seals | °C | -15 … +80 | |||||
Viscosity range | mm²/s | 10 … 800 | |||||
Maximum admissible degree of contamination of the hydraulic fluid 1) | Class 20/18/15 according to ISO 4406 (c) | ||||||
| 1) | 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. |
注意：
油箱预压会叠加到最低设定压力上（T 口和 Y 口）
Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
Mineral oils | HL, HLP | NBR, FKM | DIN 51524 | 90220 | |
Bio-degradable 1) | Insoluble in water | HETG | FKM | ISO 15380 | 90221 |
HEES | FKM | ||||
Soluble in water | HEPG | FKM | ISO 15380 | ||
Flame-resistant | Water-free | HFDU (glycol base) | FKM | ISO 12922 | 90222 |
HFDU (ester base) 1) | FKM | ||||
Containing water | HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) | NBR | ISO 12922 | 90223 | |
Important information on hydraulic fluids:
| |||||
| 1) | Not recommended for corrosion-protected version “J3” |
(元件系列 5X，依据压力设备指令 2014/68/EU)
Version | Pilot oil flow "no code" | Pilot oil flow "Y" | ||
Maximum counter pressure | Port Y | bar | - | 0 |
Port T | bar | See characteristic curves and explanatory notes for maximum counter pressure | PT < 15 | |
Maximum flow | See ordering code, safety instructions and characteristic curves "Type-examination tested safety valve" | |||
Hydraulic fluid | Mineral oil (HL, HLP) according to DIN 51524 and DIN 51524-1 | |||
Hydraulic fluid temperature range | °C | -10 … +60 | ||
Viscosity range | mm²/s | 12 … 230 | ||
Dimensions in mm
1 | Name plate |
2 | X port for pilot oil supply, external |
3 | Y port for pilot oil return, external |
4 | Adjustment type "1" |
5 | Adjustment type "2" |
6 | Adjustment type "3" |
7 | Adjustment type "7" |
8 | Hexagon SW10 |
9 | Space required to remove the key |
11 | Valve mounting bores |
19 | Omitted with internal pilot oil return |
Version | D1 | ØD2 | T1 |
mm | mm | ||
| "DB 10 G" | G1/2 | 34 | 14 |
| "DB 15 G" | G3/4 | 42 | 16 |
| "DB 20 G" | G1 | 47 | 18 |
| "DB 25 G" | G1 1/4 | 58 | 20 |
| "DB 30 G" | G1 1/2 | 65 | 22 |
Dimensions in mm
1 | Name plate |
2 | X port for pilot oil supply, external |
3 | Y port for pilot oil return, external |
4 | Adjustment type "1" |
5 | Adjustment type "2" |
6 | Adjustment type "3" |
7 | Adjustment type "7" |
8 | Hexagon SW10 |
9 | Space required to remove the key |
10 | Locking pin |
11 | Valve mounting bores |
19 | Omitted with internal pilot oil return |
35 | Lock nut SW17, tightening torque MA = 10+5 Nm |
Version | L1 | L2 | L3 | L4 | L5 | L6 | L7 | L8 | L9 | B1 | B2 | ØD1 |
mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |
| "DB 10" | 91 | 53.8 | 22.1 | 27.5 | 22.1 | 47.5 | 0 | 25.5 | 2 | 78 | 53.8 | 14 |
| "DB 20" | 116 | 66.7 | 33.4 | 33.3 | 11.1 | 55.6 | 23.8 | 22.8 | 10.5 | 100 | 70 | 18 |
| "DB 30" | 147.5 | 88.9 | 44.5 | 41 | 12.7 | 76.2 | 31.8 | 20 | 21 | 115 | 82.6 | 20 |
Dimensions in mm
Dimensions in mm
1 | Name plate |
3 | Y port for pilot oil return, external |
5 | Adjustment type "2" |
6 | Adjustment type "3" |
7 | Adjustment type "7" |
8 | Hexagon SW10 |
9 | Space required to remove the key |
11 | Valve mounting bores |
20 | Seal ring |
21 | Main spool insert |
22 | Bore Ø32 mm can cut Ø45 mm at any point. However, it must be observed that the connection bore X and the mounting bore are not damaged! |
23 | Support ring and seal ring are to be inserted into this bore before assembly of the main spool. |
24 | Nozzle (separate order; recommended nozzle Ø1.0 mm) |
25 | Seal ring |
26 | Seal ring |
27 | Seal ring |
28 | Support ring |
29 | Support ring |
35 | Lock nut SW17, tightening torque MA = 10+5 Nm |
Valve mounting screws (separate order)
For reasons of stability, exclusively the following valve mounting screws may be used:
Version "DB 10"
4 x ISO 4762 - M12 x 50 - 10.9-flZn/nc/480h/C
with friction coefficient μtotal = 0.09 … 0.14
tightening torque MA = 75 Nm ±10%
material no. R913015611
Version "DB 20"
4 x ISO 4762 - M16 x 50 - 10.9-flZn/nc/480h/C
with friction coefficient μtotal = 0.09 … 0.14
tightening torque MA = 185 Nm ±10%
material no. R913015664
Version "DB 30"
4 x DIN 912 - M18 x 50 - 10.9-flZn/nc/480h/C
with friction coefficient μtotal = 0.09 … 0.14
tightening torque MA = 248 Nm ±10%
material no. R913015903
Version "DBC", "DBC 10", "DBC 30" and "DBT"
4 x ISO 4762 - M8 x 40 - 10.9-flZn/nc/480h/C
with friction coefficient μtotal = 0.09 … 0.14
tightening torque MA = 31 Nm ±10%
material no. R913015798
Notice:
The tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ±10%).
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Required surface quality of the valve contact surface |
