SV08 Cartridge Solenoid Valve SV08-40-0-P-24DC SV08-47A-0-N-00 SV08-47C-0-N SV08-47D-0-N

SV08-40-0-P-24DC is a VC08 valve hole, 40 rated pressure class, P-type pilot-controlled 24V DC electromagnetic cartridge balance valve. It is mainly used for load locking and reverse speed limiting in medium and high-pressure low-flow hydraulic circuits. The maximum working pressure is 315bar, and the flow rate is 60L/min. Suitable for safety control scenarios of small-scale construction machinery and industrial hydraulic actuating components. The following is the structured details:
Model Analysis
SV08-40-0-P-24DC is a cartridge pilot-operated solenoid balance valve. SV stands for the balance valve series, 08 is the VC08 valve hole specification, 40 is the rated pressure rating (corresponding to 315bar), 0 is the basic specification without additional functions, P is the pilot-operated type, and 24DC is 24V DC electromagnetic drive. Integrated check valve + pilot throttling module, reverse load controllable speed limit, forward free flow.
Technical parameters
Parameter item: Numerical value
Valve hole specification: VC08
Diameter/Flow capacity: 15 diameters; 60L/min (15.8gpm)
Maximum working pressure: 315bar (4568psi)
Control pressure range: 0.8-8.0bar (pilot opening pressure)
Rated voltage/power: DC24V; The rated power is approximately 12W, and the compatible voltage is 19.2-28.8V
Leakage: ≤0.1cc/min (at 315bar)
Sealing material: Nitrile rubber (N), fluorine rubber (V) is optional
Compatible medium: Mineral oil, synthetic hydraulic oil (viscosity 7.4-420cSt)
Working temperature: Nitrile: -30℃ to 100℃ Fluororubber: -20℃ to 150℃
Oil cleanliness: ISO 4406 18/15/12 grade
Installation torque: Cartridge core: 28-32N · m; Coil nut: 6.8-9.5N · m
Weight: Approximately 0.55kg including coil
Working principle
Forward free flow: The oil flows forward through the check valve (Port 1→ Port 2) without resistance and passes quickly, meeting the oil supply requirements for the extension/rotation actions of the actuator (cylinder/motor).
Reverse load locking: When there is no pilot pressure, the spring force presses the balance valve core tightly against the valve seat, and the oil flow is completely cut off in the reverse direction (Port 2→ Port 1), preventing the load from sliding down or reversing due to its own weight or pressure fluctuations, ensuring static safety.
Pilot opening speed limit: After the DC24V coil is energized, the pilot pressure acts on the valve core control chamber, overcomes the spring force to push the valve core to open, and the oil flows in the reverse direction. The built-in throttling structure can adjust the reverse flow velocity to prevent shock caused by rapid load movement.
Reset mechanism: After power failure, the electromagnetic force disappears, the pilot pressure is released, and the spring pushes the valve core to reset, restoring the reverse locking state.
Product attributes
Type: Cartridge pilot-operated solenoid balance valve (pilot type).
Drive mode: DC24V DC electromagnetic drive, spring return + pilot pressure regulation.
Structural features: VC08 cartridge type, integrated check valve + pilot throttling module, internal leakage design.
Control mode: Electromagnetic control + pilot pressure regulation, adjustable reverse flow velocity.
Compatible medium: Mineral oil, synthetic hydraulic oil (compatible with corresponding seals).
Features
High load holding accuracy: Pilot control + conical surface sealing, extremely low reverse leakage, stable static load locking, preventing drift.
Reverse speed limit adjustable: Equipped with an internal throttling mechanism, it can precisely adjust the load drop/retraction speed to meet the requirements of different working conditions.
Quick response: The combination of electromagnetic drive and pilot control enables a fast valve core opening/resetting response, making it suitable for high-frequency start-stop circuits.
Flexible installation: The VC08 valve hole is universal, the coil can rotate 360°, suitable for compact valve block layout, and there is no installation direction restriction.
Easy maintenance: The plug-in structure enables quick disassembly and replacement of coils or seals, reducing maintenance costs.
Function and role
Load locking: Prevents the actuator load from moving in reverse due to its own weight or pressure fluctuations, ensuring the safety of equipment and personnel.
Reverse speed limiting: Adjust the reverse flow velocity to prevent rapid drop/reverse rotation of the load from causing impact damage to components.
Loop protection: In conjunction with other valve components, it forms a safety loop. When the system fails, it quickly locks the load to prevent secondary injuries.
Sequential action: Linked with the directional control valve, it realizes the sequential action control of multiple actuating elements, enhancing the degree of system automation.
Precautions for Use
Installation specifications: Install according to the flow direction of the oil port. Avoid clogging of the pilot port. The sealing parts should be compatible with the medium temperature and type to prevent leakage.
Pilot pressure matching: The pilot pressure needs to be adjusted according to the load weight to avoid insufficient opening causing action lag or over-opening leading to overspeed.
Electrical protection: Prevent short circuits and reverse connections in the coil wiring. Install surge suppressors to avoid damage to the electromagnetic coils due to overvoltage or overcurrent.
Oil maintenance: Regularly replace the filter element to keep the oil clean and prevent impurities from getting stuck in the valve element and affecting the control accuracy.
Maintenance safety: Before maintenance, pressure must be released and the power supply cut off to prevent accidental movement of the valve core from causing load loss and injury.
Temperature adaptation: Fluororubber seals are selected for high-temperature working conditions to prevent seal aging and failure.
Usage scenarios and models
Application scenarios: Control of the small arm/bucket of small excavators, outriggers/boom circuits of loaders, boom lifting of aerial work platforms, lifting control of medical beds/lifting platforms, ejection circuits of injection molding machines, action control of small agricultural tools in agricultural machinery, etc.
Compatible models: Small excavators, micro loaders, small cranes, aerial work platforms, medical lifting beds, small hydraulic lifting platforms, injection molding machines, agricultural machinery and other hydraulic equipment that require load holding and speed limiting.
Recommended list of SV series balance valve models
The following models are suitable for different valve holes, pressures, control methods and working conditions, facilitating selection and replacement:
SV06-31-0-M-24DC: VC06 valve hole, 31 pressure rating (210bar), manual pilot, DC24V, compatible with micro cylinders (such as medical equipment).
SV08-40-0-E-220AC: VC08 valve hole, 40 pressure rating, electromagnetic pilot, AC220V, suitable for small construction machinery powered by AC.
SV12-35-1-L-24DC: VC12-2 valve hole, 35 pressure rating (250bar), with bypass throttling, DC24V, suitable for excavator boom circuits.
SV16-40-0-R-24DC: VC16 valve hole, 40 pressure rating, remote pilot, DC24V, suitable for high-flow mining machinery actuator components.
SV08-40-0-P-12DC: VC08 valve hole, 40 pressure rating, pilot control, DC12V, suitable for small hydraulic equipment powered by 12V.