As válvulas seccionais da série SD25 são produtos de alto desempenho com uma ampla gama de aplicações em máquinas de construção, máquinas de saneamento e máquinas de perfuração. As válvulas monobloco da série SD25 são caracterizadas por alta pressão de trabalho, estrutura compacta, boas características de abertura e fechamento de válvulas de segurança e sobrecarga e boa versatilidade.
Válvula seccional monobloco série SD25
MODEL：SD25 Series Sectional Directional Valve
APPLICATIONS & FEATURES：
SD25 Series Sectional Valves are simple,compact and heavy duty designed sectional valve from 1 to 12 sections for open and closed center hydralic systems.
Fitted with a main pressure relife valve and a load check valve on every working section.
Avaliable with parallel or series circuit.
Optional carry-over port.
A wide variety of service ports and circuit valves.
Diameter 25 mm(0.98 in) interchangeable spools.
Available manual,pneumatic,hydraulic,elector-hydralic,and remote with flexible cables spool control kits.
OPERATION：
Basic principle: The basic principle of the SD25 Series Sectional Valve is to change the flow direction of the oil by moving the valve core in the valve body, thereby controlling the movement direction and speed of the hydraulic actuator. When the valve core is in different positions, the oil inlet is connected to different oil outlets to achieve the distribution and flow control of the hydraulic oil.
Oil circuit connection method: The various connections of this series of valves can be connected in parallel or in series. For example, when connected in parallel, the oil from the oil inlet is directly connected to the oil inlet chamber of each directional valve, and the oil return chamber of each valve is directly connected to the total oil return port of the multi-way valve. This connection method has a small pressure loss and can make multiple actuators work at the same time, but the flow distributed to each actuator is only a part of the pump flow.
SPECIFICATIONS：
| Nominal Flow | 240 L/min |
| Viscosity Range | 12-400 CST |
| Max.Pressure | 250 bar |
| Ambient Temp | -40~80℃ |
| Valve structure | Sectional Valve |
| Valve surface | Phosphating treating |
| Valve Sections | 1-12Sections |
| Rustproof Level | Neutral salt Spray test，48 hours |
SD25 SERIES SECTIONAL VALVE DIMENSIONS DATA：
Application Areas：
Engineering machinery: widely used in excavators, loaders, rollers, forklifts, truck cranes, concrete pump trucks and other equipment to control the working devices of these machines, such as the lifting and retracting of the excavator arm, the lifting and flipping of the loader bucket, and other actions to achieve various complex engineering tasks.
Agricultural machinery: can be used for agricultural machinery such as tractors, harvesters, and seeders to control the lifting, tilting, and rotation of agricultural machinery and improve the mechanization and efficiency of agricultural production.
Industrial vehicle: in industrial vehicles such as forklifts and stackers, the SD25 series segmented multi-way valve is used to control the lifting and lowering of the vehicle's cargo forks, the tilting of the gantry, and other actions to achieve cargo loading and unloading and handling operations.
