Hydraulic Pilot Operated - Switching Isolator Valve - Check Valve (Bosch - Rexroth) , Without Drain Connection - Type SV. - Nominal Size NS25. - 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 NS25. - Qmax. = approx. 550 L/min. - Pmax. = 315 bar. - (P)(A)- With Pre-Opening.
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SV_25_GA1-4X-
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Modified on: August 24,2026  
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Specifications
Supplier part number: SV_25_GA1-4X-
Name:Hydraulic Pilot Operated - Switching Isolator Valve - Check Valve (Bosch - Rexroth) , Without Drain Connection - Type SV. - Nominal Size NS25. - Qmax. = approx. 550 L/min. - Pmax. = 315 bar. - (P)(A)- With Pre-Opening.
Description:Based on the specifications you provided, a pilot-operated check valve matching your requirements is available within the Bosch Rexroth SV series. The "SV" type has internal pilot oil return, meaning it does not require a separate drain connection . Your specific configuration—a nominal size NS25 with subplate mounting (P) and pre-opening (A)—is identified as the SV 25 PA1-4X/ model . ✅ Technical Specifications for SV 25 P A 1-4X/ The key technical parameters that align with your request are: Maximum Operating Pressure: 315 bar . Maximum Flow: Up to 550 L/min. While your requirement is 350 L/min, the valve supports higher flow rates if needed . Pre-Opening: Yes. The "A" in the model code specifies the version with pre-opening . This feature provides a two-stage opening process. It first lifts a small ball poppet to dampen pressure surges, then opens the main poppet, avoiding switching shocks and noise . Mounting: P denotes subplate mounting . Porting Pattern: ISO 5781 standard . 📋 Additional Technical Details Parameter Specification for NS25 Subplate Version Cracking Pressure 2.5 bar (standard for code 1) Minimum Pilot Pressure 5 bar Pilot Volume (Port X) 19.27 cm³ Weight (approx.) 7.8 kg Hydraulic Fluid Mineral oils (HL, HLP) or biodegradable fluids (with appropriate seals) Cleanliness Class ISO 4406 (C) class 20/18/15 🔍 Understanding the Ordering Code Your specifications translate into the Rexroth ordering code as follows : SV: Pilot-operated check valve with internal pilot oil return. 25: Nominal size 25 (NS25). P: Subplate mounting. A: Version with pre-opening. 1: Standard cracking pressure (2.5 bar). 4X: Component series 40 to 49. /: Placeholder for additional options like seal material (NBR or FKM) and corrosion resistance .
    
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