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. - (P)(A)- With Pre-Opening. · 模型 177795
The Bosch Rexroth pilot-operated check valve matching your exact specifications—nominal size 20 (NS20), with subplate mounting (P), and the version with pre-opening (A)—is identified by the model number SV 20 P A 1-4X/ . The "A" version includes a pre-opening feature that provides a two-stage opening process to dampen decompression, reducing switching shocks and noise during operation . ✅ Technical Specifications The table below summarizes the confirmed performance parameters for this valve family, which align with your requirements : Parameter Specification Type SV (Pilot oil return internal / Without drain connection) Nominal Size 20 (NS20 / NG20) Maximum Operating Pressure 315 bar Maximum Flow 350 L/min (The valve series supports up to 550 L/min; your specified 350 L/min is within its capacity) Mounting P – Subplate mounting Pre-opening A – With pre-opening 🔧 Ordering Code Breakdown The valve's specifications are encoded in its model number as follows : SV: Type (pilot-operated check valve with internal pilot oil return). 20: Nominal size (NS20). P: Subplate mounting. A: Version with pre-opening. 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). For example, the valve with the material number R900587557 corresponds to a model such as SV20PA1-4X/ . Versions with different cracking pressures, like SV20PA2-4X/, are also documented . 💡 Understanding the "A" Version (With Pre-Opening) The version with pre-opening offers distinct operational benefits: Operation: When pilot pressure is applied at port X, the control spool moves, pushing first a small ball poppet off its seat (pre-opening), followed by the main seat poppet . Benefits: This two-stage setup provides dampened decompression of the pressure volume on the actuator side, effectively avoiding switching shocks. It also ensures secure unloading even with low pilot pressure, reducing the risk of premature wear on system components and noise generation .
- 格式
- Parasolid、Other
- 分类
- Components、Industrial design、Machine design
- 标签
- hydrauliccomponents、motioncontrol、hydraulicsystems、fluidpower、iso5781、preopening、subplatemounting、315bar、ng20、ns20、sv20、hydraulicvalve、checkvalve、pilotoperatedcheckvalve、industrialhydraulics、hydraulics、bosch、rexroth、boschrexroth
- 数据更新
- 2026-09-10T12:38:51Z
