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)(A)- With Pre-Opening. · 模型 51189
For the Bosch Rexroth SV pilot-operated check valve (isolator valve) with your specified parameters—nominal size 20 (NS20), 350 L/min max flow, 315 bar max pressure, threaded connection (G), and with pre-opening (A)—the correct type code is SV 20 G A 1-4X/.... Valve Configuration and Ordering Code Your specifications translate directly into the Rexroth ordering code, which is structured as follows : Parameter Code Meaning Type SV Pilot-operated check valve with internal pilot oil return (no drain connection) Size 20 Nominal size 20 (NG20) Connection G Threaded connection according to ISO 228-1 Pre-opening A Version with pre-opening for dampened decompression Cracking Pressure 1, 2, 3, or 4 Code 1 (standard) to 4 for other cracking pressures Component Series 4X Component series 40 to 49 (dimensions remain unchanged) A complete ordering code for your configuration would follow this pattern: SV 20 G A 1-4X/... or SV 20 G A 2-4X/..., depending on the desired cracking pressure. The search results show that a valve with a 5.0 bar cracking pressure is designated by code 2 , while a model with the "A" (with pre-opening) and "G" (threaded connection) designation is listed as the SV20GA1-4X and SV20GA4-4X variants. Technical Specifications for NS20 The NS20 (NG20) valve series from Bosch Rexroth supports your required parameters: Maximum Operating Pressure: 315 bar Maximum Flow: The valve series supports up to 550 L/min; your specified 350 L/min is well within its capacity . Product listings confirm flow rates of 300 L/min and other sources note "maximum flow" is characterized by curves . Weight: Approx. 4.7 kg (subplate mounting) or 5.4 kg (threaded connection) . Function of the "A" Version (With Pre-Opening) The "A" version is the preferred choice for smoother system operation. When pilot pressure is applied at port X, the valve opens in two stages : First, a small ball poppet opens, pre-releasing the pressure. Then, the main poppet opens to allow full reverse flow. This two-stage process provides two key benefits : Avoidance of switching shocks: It provides dampened decompression of the pressure volume on the actuator side, preventing sudden, noisy pressure releases. Reduced wear: By minimizing system shocks, it prevents premature wear on installed components.
- 格式
- Other、Parasolid
- 分类
- Electrical、Energy and Power、Robotics
- 标签
- engineerin、rexrothparts、hydrauliccomponents、industrialautomation、mechanicalengineering、motioncontrol、hydraulicsystems、fluidpower、iso5781、isosv、preopening、threadedconnection、315bar、ng20、ns20、sv20、checkvalve、pilotoperatedcheckvalve
- 数据更新
- 2026-09-10T13:30:21Z
