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Description
- Size 100/140, 18/28, 45, 71
- Maximum operating pressure 350 bar
Features
- The pump preload valve SYDZ 0001 if the flow of control pumps A10VSO with SYDFE adjustment has to be controllable at an operating pressure of less than 12 bar and only internal pilot fluid is available for the adjustment.
- The pump preload valve SYDZ 0001 has integrated preload and maximum pressure limitation.
- Notice: The pressure limitation is determined according to the ordering code (see type key) and is not adjustable.
- The pump preload valve SYDZ 0001 is directly fastened at the SAE pressure connection of the variable displacement pump A10VSO (see RE 92711 and RE 92714).
Product description
The pressure pre-loading is only effective within the pressure range up to 20 bar. If the operating pressure in port P1 exceeds 30 bar, the preload valve (1) is completely opened. For limitation of the maximum pressure, a pressure relief valve (2) is integrated in the pump preload valve which is fixedly set at the factory (see ordering code). An integrated check valve (3) that may be available allows for the pressure control in the range < 20 bar.
Notice:
The pressure limiting function is a pure safety function and not suitable for continuous operation!
Upon commissioning, the system is to be bled.
Type code
Only for separate order of the pump preload valve
Symbols/Circuit diagrams
| 1 | Preload valve |
| 2 | Pressure relief valve |
| 3 | Check valve |
| 4 | Bleed screw |
Dimensions
| NG | ØA | B | C | D | E | F | G | ØK | L | M | ØO | PP 1) | P1 | P | MP1 | T 2) |
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||||||
| 18/28 | 75 | 115 | 104 | 60.5 | 30 | 14 | 30 | 34 | 22.2 | 47.6 | 4 x 10,5 mm | SAE 3/4“ | G1/2 | G1/8 | G1/4 | G3/8 |
| 45 | 80 | 115 | 104 | 60.5 | 29 | 15 | 33 | 34 | 26.2 | 52.4 | 4 x 10,5 mm | SAE 1“ | G3/4 | G1/8 | G1/4 | G3/8 |
| 1) | according to DIN ISO 6162-1 |
| 2) | The piping must be completed in L (light row). |
The following is not included in the scope of delivery:
Valve mounting screws
for NG18, 28 and 45
4 hexagon socket head cap screws
ISO4762-M10X120-10.9-flZn-240h-L,
friction coefficient μtotal = 0.09 to 0.14 according to VDA 235-101,
Tightening torque MA = 50 Nm,
material number: R913000074
| NG | A | B | C | D | E | F | G | H | ØK | L | M | N | ØO | PP | P1 | P | MP1 | T 3) |
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | |||||||
| 71 | 85 | 150 | 134 | 94 | 55 | 24 | 56 | 44 | 45 | 30.2 | 58.7 | 4.5 | 4 x 10,5 mm | SAE 1 1/4“ 1) | G1/8 | G1/4 | G3/4 | |
| 100/140 | 85 | 147 | 131 | 91 | 52 | 24 | 56.5 | 48 | 45 | 31.8 | 66.7 | 4.5 | 4 x 15 mm | SAE 1 1/4“ 2) | SAE 1 1/4“ 2) | G1/8 | G1/4 | G3/4 |
| 1) | according to DIN ISO 6162-1 |
| 2) | according to DIN ISO 6162-2 |
| 3) | The piping must be completed in L (light row). |
The following is not included in the scope of delivery:
Valve mounting screws
for NG71:
4 hexagon socket head cap screws
ISO4762-M10X150-10.9-flZn-240h-L,
friction coefficient μtotal = 0.09 to 0.14 according to VDA 235-101,
Tightening torque MA = 55 Nm,
material number: R913000071
for NG100 and 140:
4 hexagon socket head cap screws
ISO4762-M14X150-10.9-flZn-240h-L,
friction coefficient μtotal = 0.09 to 0.14 according to VDA 235-101,
Tightening torque MA = 100 Nm,
material number: R913000073
Downloads
 | Válvula de precompresión de bombas para sistemas de regulación SYDFE Data Sheet | RS29255 | 2012-01-31 | Spanish | PDF | 265k Product Groups: Electro-hydraulic control systems SYDZ 0001 |
| SYDFE 泵预载阀闭环控制系统 Data Sheet | RC29255 | 2012-01-31 | Chinese | PDF | 411k Product Groups: Electro-hydraulic control systems SYDZ 0001 |
| Distributeur de précharge de pompe pour système de régulation SYDFE Data Sheet | RF29255 | 2012-01-31 | French | PDF | 273k Product Groups: Electro-hydraulic control systems SYDZ 0001 |
| Valvola di precarico pompa per sistema di regolazione SYDFE Data Sheet | RI29255 | 2012-01-31 | Italian | PDF | 272k Product Groups: Electro-hydraulic control systems SYDZ 0001 |
| Pumpen-Vorspannventil für Regelsystem SYDFE Data Sheet | RD29255 | 2012-01-31 | German | PDF | 265k Product Groups: Electro-hydraulic control systems SYDZ 0001 |
| Pump pre-load valve for the SYDFE control system Data Sheet | RE29255 | 2012-01-31 | English | PDF | 272k Product Groups: Electro-hydraulic control systems SYDZ 0001 |
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