3DR16P5-5X/200Y/00M
Rexroth
R900916668
该阀用于对系统压力进行减压（P至A）及限制（A至T）。
用于底板安装。
油口布置符合ISO 4401-07-07-0-05。
底板需单独订购。
四种压力等级。
四种可选调节方式：
• 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。
3DR型压力阀是带二次回路限压功能的先导式三通减压阀，用于降低系统压力。
减压阀主要由带控制阀芯（2）的主阀（1）及带压力调节装置（10）的先导阀（3）组成。
阀在初始位置开启，液压油可由P无阻流向A。A通道压力同时经孔（4）作用于压缩弹簧（9）对侧的活塞面积，并经喷嘴（6）作用于阀芯（2）的弹簧侧，再经通道（5）作用于先导阀（3）的球（7）。
根据压缩弹簧（11）的设定，在钢球（7）上游和通道（5）内建立压力，使控制阀芯（2）保持开启。液压油由 P 通道经控制阀芯（2）流向 A 通道，直至 A 通道中的压力超过压缩弹簧（11）的设定压力，并使钢球（7）开启。
控制阀芯（2）移向关闭位置。A通道压力与压缩弹簧（11）的设定压力达到平衡时，即达到所需减压值。
若执行器受到外力，导致通道 A 中的压力继续升高，控制阀芯（2）将进一步克服压缩弹簧（9）的作用而移动。通道 A 因此经阀芯（2）上的控制边（8）与 T 通道连通，足量液压油排入油箱，使压力不再继续升高。
弹簧腔（12）的先导油始终经控制管路（13）及Y口外部回油，必须始终确保与油箱之间为无压连接。
压力表接口（14）可用于检查A通道的减压值。
01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | |||
3DR | 16 | P | – | 5X | / | Y | / | 00 | * |
01 | 3-way pressure reducing valve | 3DR |
02 | Size 16 | 16 |
03 | Subplate mounting | P |
Adjustment types | ||
04 | Rotary knob | 4 |
Sleeve with hexagon and protective cap | 5 | |
Lockable rotary knob with scale | 6 1) | |
Rotary knob with scale | 7 | |
05 | Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions) | 5X |
06 | 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 250 bar | 250 | |
Pilot oil flow | ||
07 | Internal pilot oil supply, external pilot oil return | Y |
08 | With stroke limitation | 00 |
Seal material | ||
09 | NBR seals | M |
FKM seals (other seals upon request) | V | |
Observe compatibility of seals with hydraulic fluid used. | ||
10 | Further details in the plain text | * |
| 1) H-key with material no. R900008158 is included in the scope of delivery |
Preferred types and standard units are specified in the EPS (standard price list).
Size | 16 | |
Weight | kg | 8 |
Installation position | any | |
Ambient temperature range | °C | -30 … +50 |
Size | 16 | ||
Nominal pressure | bar | 315 | |
Maximum operating pressure | Port P | bar | 315 |
Anschluss A | bar | 250 | |
Port Y | separate and depressurized to the tank | ||
Set pressure | Minimum | flow-dependent, see "characteristic curves" | |
Maximum | bar | 50 100 200 315 | |
Maximum flow | l/min | 220 | |
Hydraulic fluid | see table | ||
Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 |
FKM seals | °C | -20 … +80 | |
Viscosity range | mm²/s | 10 … 800 | |
Maximum admissible degree of contamination of the hydraulic fluid | Class 9 according to NAS 1638. For this, we recommend using a filter with a minimum retention rate of β10 ≥ 75. | ||
Hydraulic fluid | Classification | Suitable sealing materials | Standards | |
Mineral oil | HL, HLP | FKM, NBR | DIN 51524 | |
Bio-degradable | Insoluble in water | HEES (synthetic esters) | FKM | VDMA 24568 |
HETG (rape seed oil) | FKM, NBR | |||
Soluble in water | HEPG (polyglycols) | FKM | VDMA 24568 | |
Other hydraulic fluids on request | ||||
Dimensions in mm
1 | Name plate |
2 | Pilot control valve |
3 | Main valve |
4 | Adjustment type "5" |
5 | Hexagon SW10 |
6 | Adjustment type "4" |
7 | Adjustment type "6" |
8 | Adjustment type "7" |
9 | Seal rings for ports X, Y, and L |
10 | Seal rings for ports A, B, P, and T |
11 | Port X must be closed in the subplate |
12 | Ports B and L must be closed in the subplate |
13 | Pressure gauge connection |
14 | Valve contact surface, porting pattern according to ISO 4401-07-07-0-05 |
15 | Space required to remove the key |
Subplates (separate order)
G172/01 (G3/4)
G174/01 (G1)
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M10 x 60 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 73 Nm ± 10 %,
material no. R913000116
2 hexagon socket head cap screws
ISO 4762 - M6 x 60 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 15,5 Nm ± 10 %,
material no. R913000115
Notice:
The specified tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10%).
