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. - (G)(B)- Without 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. - (G)(B)- Without Pre-Opening.
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SV_30_GB1-4X-
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Modified on: August 24,2026  
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Specifications
Supplier part number: SV_30_GB1-4X-
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. - (G)(B)- Without Pre-Opening.
Description:The Bosch Rexroth SV 30 G B 1-4X/ valve matches your specified configuration: a pilot-operated check valve with a nominal size of NS30, a threaded connection (G), and the version without pre-opening (B). The technical data confirms this valve meets your requirements for a maximum operating pressure of 315 bar and a maximum flow rate of up to 550 l/min . ✅ Valve Specifications 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 30 Nominal size 30 (NS30/NG32) Connection G Threaded connection according to ISO 228-1 Pre-opening B Version without pre-opening (as specified) Cracking Pressure 1 2.5 bar (standard; other options like 5, 7.5, or 10 bar are 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 G B 1-4X/.... Model variants like SV30GB1-4X/ are documented in product listings . 📊 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 350 l/min is well within capacity) Minimum Pilot Pressure 5 bar Cracking Pressure (Code 1) 2.5 bar Weight Approx. 10 kg Pilot Port X Thread G 1/4 Pilot Volume (port X) 19.27 cm³ 💡 Understanding the "B" Version (Without Pre-Opening) The version without pre-opening operates differently from its "A" counterpart, and this has specific implications for your system : 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
    
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