Bosch Rexroth | SV30GA1-4X12
SV30GA1-4X/12
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The SV30GA1-4X/12 check valve is produced by Bosch Rexroth for the Hy-Check Valves series and serves hydraulic automation systems by blocking return flow while permitting forward passage. It uses a threaded connection that follows the UNF/UN (ANSI/ASME B1.1) standard, allowing direct line or manifold mounting. With a nominal size of NG32, the valve handles up to 550 l/min at a maximum operating pressure of 315 bar. Flow begins when the poppet sees a cracking pressure of 2.5 bar, and the built-in pre-opening feature limits pressure shocks during this transition. The body can be installed in any orientation, and control area A1 is 5.72 cm², a value that sets the initial hydraulic force acting on the poppet.
Pilot operation is achieved through port X, where a minimum pilot pressure of 5 bar exposes control area A3 of 16.61 cm² to the pilot oil. The pilot cavity volume is 19.27 cm³, influencing the time needed for the valve to release under remote command. Pilot oil returns internally, eliminating the need for an external drain. System fluid must meet ISO 4406 class 20/18/15 to preserve sealing integrity, and the assembly weighs 10 kg, providing mechanical stability once mounted. These parameters combine to give the SV30GA1-4X/12 reliable shut-off and controlled unloading functions in load-holding or safety circuits.
Technical Specifications
Connection Type
Threaded Connection
Control Area A1
5.72 cm²
Control Area A3
16.61 cm²
Cracking Pressure
2.5 bar
Free Flow Direction
A→B
Hydraulic Cleanliness Class
20/18/15 (ISO 4406(c))
Installation Position
Any
Maximum Flow
550 l/min
Maximum Operating Pressure
315 bar
Minimum Pilot Pressure
5 bar
Nominal Size
NG32
Pilot Oil Return
Internal
Pilot Volume (port X)
19.27 cm³
Pre-opening
Yes
Thread Standard
UNF/UN (ANSI/ASME B1.1)
Weight
10 kg
1620 Old Apex Road
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