Hydraulic Pilot Operated - Switching Isolator Valve - Check Valve (Bosch - Rexroth) , Without Drain Connection - Type SV. - Nominal Size NS30. - Qmax. = approx. 550 L/min. - Pmax. = 315 bar. - (P)(A)- With Pre-Opening.

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Hydraulic Pilot Operated - Switching Isolator Valve - Check Valve (Bosch - Rexroth) , Without Drain Connection - Type SV. - Nominal Size NS30. - Qmax. = approx. 550 L/min. - Pmax. = 315 bar. - (P)(A)- With Pre-Opening.
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SV_30_PA1-4X
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Modified on: August 24,2026  
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Specifications
Supplier part number: SV_30_PA1-4X
Name:Hydraulic Pilot Operated - Switching Isolator Valve - Check Valve (Bosch - Rexroth) , Without Drain Connection - Type SV. - Nominal Size NS30. - Qmax. = approx. 550 L/min. - Pmax. = 315 bar. - (P)(A)- With Pre-Opening.
Description:The Bosch Rexroth SV 30 P A 1-4X/ valve is the model that matches your exact specifications: a pilot-operated check valve with a nominal size of NS30, subplate mounting (P), and the version with pre-opening (A). The "A" version includes a two-stage opening process to dampen decompression, reducing switching shocks and noise during operation . ✅ Valve Specifications and Ordering Code Your specifications translate directly into the Rexroth ordering code as follows: Parameter Code Meaning Type SV Pilot-operated check valve with internal pilot oil return (no drain connection) Size 30 Nominal size 30 (NS30/NG32) Mounting P Subplate mounting Pre-opening A Version with pre-opening (as specified) Cracking Pressure 1 2.5 bar (standard; other options like 5, 7.5, or 10 bar available with codes 2, 3, or 4) Component Series 4X Component series 40 to 49 (dimensions remain unchanged) A complete ordering code for your configuration follows this pattern: SV 30 P A 1-4X/... . 📊 Key Technical Specifications (NS30 / NG32) The technical data confirms the following details for this configuration : Parameter Specification Maximum Operating Pressure 315 bar Maximum Flow Up to 550 l/min (your specified flow is well within this capacity) Minimum Pilot Pressure 5 bar Cracking Pressure (Code 1) 2.5 bar Weight Approx. 7.8 - 7.9 kg Porting Pattern ISO 5781-10-13-0-00 Pilot Port X Thread G 1/4 Pilot Volume (port X) 19.27 cm³ Cleanliness Class ISO 4406 20/18/15 💡 Understanding the "A" Version (With Pre-Opening) The "A" version is designed for smoother system operation and includes an additional pre-opening feature. When pilot pressure is applied at port X, the control spool moves and first lifts a small ball poppet (pre-opening), followed by the main seat poppet . This two-stage setup provides distinct benefits : Avoidance of switching shocks: Provides dampened decompression of the pressure volume on the actuator side, preventing sudden, no
    
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