Hydraulic steering control unit(SCU) is widely used both in the steering system of vehicles and the marine rudder. The operator can obtain bigger steering control force with less steering force, and its function is more safety and reliable, its operation is more smooth and flexible.
BZZ1,BZZ2,BZZ3 series SCU offers the advantages as follows:
This kind of SCU series can help you reduce the machinery cost without mechanical linkage device, and can offer reliable and light structure.
This kind of SCU series can operate more flexible with light steering torque.
This kind of SCU series can offer emergent manual steering in case of engine failure.
This kind of SCU series can be steering at the continuous speed with less steering torque.
This kind of SCU series can offer various hydraulic system and different mounting choice.
This kind of SCU series can link various steering pump and hydraulic steering system.
In addition to the advantages mentioned above, BZZ5 series SCU has the features as follows:
BZZ5 series SCU can supply priority relative flow to ensure reliable , sensitive and flexible steering according to the requirement of hydraulic steering system, whether the load pressure is big or small, or the steering wheel rotates quick or slow.
In addition to the necessary flow supply to the steering system, the remaining flow out of the pump can be supplied to subsidiary flow system , so that the system can avoid the power loss caused by surplus flow out of the steering flow system, and the system efficiency can be increased.
Function Code
Main Specification
| Type | Displacement (mL/r) |
Flow (L/min) |
Max.input pressure (MPa) |
Max. cont. back pressure (MPa) |
Weight (kg) |
| BZZ□ –E50 * | 50 | 4 | 16 | 2.5 | 4.72 |
| BZZ□ –E63 * | 63 | 5 | 4.85 | ||
| BZZ□ –E80 * | 80 | 6 | 5.00 | ||
| BZZ□ –E100 * | 100 | 7.5 | 5.27 | ||
| BZZ□ –E125 * | 125 | 9.5 | 5.43 | ||
| BZZ□ –E160 * | 160 | 12 | 5.75 | ||
| BZZ□ –E200 * | 200 | 15 | 6.08 | ||
| BZZ□ –E250 * | 250 | 19 | 6.48 | ||
| BZZ□ –E280 * | 280 | 21 | 6.78 | ||
| BZZ□ –E315 * | 315 | 24 | 7.13 | ||
| BZZ□ –E400 * | 400 | 30 | 7.78 | ||
| BZZ□ –E500 * | 500 | 38 | 8.67 | ||
| BZZ□ –E630 * | 630 | 48 | 9.72 | ||
| BZZ□ –E800 * | 800 | 60 | 11.18 | ||
| BZZ□ –E1000 * | 1000 | 75 | 12.80 |
Note 1: □ represents Function Code, BZZ2 can be chosen for SCU with the displacement of 50-200mL/r. BZZ1 or BZZ3 can be chosen for SCU with the displacement of 50-1000mL/r.
Note 2: “Flow” that we suggest to use is the flow of 1.25 times as much as that at the steering wheel’s rotation speed of 60 r/min. If the design of the system can't meet the requirements, the flow is allowed to be adjusted a little bit.
Mounting Data
Note 2: please check Page 4 for the port code .
| Type | Length L (mm) |
| BZZ□ –E50 * | 140 |
| BZZ□ –E63 * | 141 |
| BZZ□ –E80 * | 142.5 |
| BZZ□ –E100 * | 145 |
| BZZ□ –E125 * | 148 |
| BZZ□ –E160 * | 153 |
| BZZ□ –E200 * | 158 |
| BZZ□ –E250 * | 164 |
| BZZ□ –E280 * | 169 |
| BZZ□ –E315 * | 174 |
| BZZ□ –E400 * | 184 |
| BZZ□ –E500 * | 197 |
| BZZ□ –E630 * | 216 |
| BZZ□ –E800 * | 236 |
| BZZ□ –E1000 * | 262 |
Note 1: □ represents Function Code,BZZ2 can be chosen for SCU with the displacement of 50-200mL/r . BZZ1 or BZZ3 can be chosen for SCU with the displacement of 50-1000mL/r.