GrabCAD 模型信息
Hydraulic Pilot Operated - Switching Isolator Valve - Check Valve (Bosch - Rexroth) , Without Drain Connection - Type SV. - Nominal Size NS20. - Qmax. = approx. 350 L/min. - Pmax. = 315 bar. - (G)(B)- Without Pre-Opening. · 模型 51187
The Bosch Rexroth SV 20 G B 1-4X/... valve matches your specified configuration: a pilot-operated check valve (isolator valve) without drain connection, nominal size 20 (NS20), threaded connection (G), and version without pre-opening (B). The technical specifications for this valve series are as follows: Parameter Specification Type SV (Pilot oil return internal / Without drain connection) Nominal Size 20 (NS20 / NG20) Maximum Operating Pressure 315 bar Maximum Flow The series supports up to 550 L/min; your specified 350 L/min is within its capacity Pre-opening B – Without pre-opening Connection G – Threaded connection according to ISO 228-1 🔧 Ordering Code Breakdown The valve's specifications are encoded in its model number. An example of a full ordering code for your configuration is SV 20 G B 1-4X/... . The code is structured as follows : SV: Type (pilot-operated check valve with internal pilot oil return). 20: Nominal size (NS20). G: Threaded connection. B: Version without pre-opening (as specified). 1: Cracking pressure code (standard is 2.5 bar for this size; other options like 5, 7.5, or 10 bar are available via code 2, 3, or 4) . 4X: Component series 40 to 49 (installation and connection dimensions remain unchanged) . Valves with the B version are documented under material numbers such as R978872250 and R900598553 . 💡 Design Considerations for Version "B" The without pre-opening (B) version operates differently from its A counterpart . Choosing this variant has specific implications: Operation: When pilot pressure is applied at port X, the control spool moves and directly lifts the main seat poppet . Impact: The pressurized volume on the actuator side may be unloaded suddenly . This can lead to switching shocks and increased noise, which may cause premature wear on system components . Version B is suitable for applications where controlled decompression is not a critical requirement and a direct, rapid opening is acceptable .
- 格式
- Parasolid、Other
- 分类
- Electrical、Energy and Power、Robotics
- 标签
- hydraulicco、motioncontrol、hydraulicsystems、fluidpower、iso228、withoutpreopening、threadedconnection、315bar、ng20、ns20、sv20、hydraulicvalve、checkvalve、pilotoperatedcheckvalve、industrialhydraulics、hydraulics、bosch、rexroth、boschrexroth
- 数据更新
- 2026-09-10T12:38:51Z
