Bosch Rexroth | SL30GB3-4XV12
SL30GB3-4X/V/12
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The SL30GB3-4X/V/12 valve belongs to the Hy-Check Valves series from Bosch Rexroth and is used to prevent reverse flow in hydraulic automation circuits. A threaded connection built to the UNF/UN standard simplifies assembly with standard adapters. Nominal size 32 sets the internal flow capacity for mid-range pipework. A maximum operating pressure of 315 bar permits use in high-pressure machines. The valve passes up to 550 l/min to support cylinders with large displacement. A cracking pressure of 8.0 bar prevents unintended motion until the set differential is reached. Operation is allowed down to −15 °C with FKM seals, and an oil cleanliness level of ISO 4406 20/18/15 is required to avoid wear.
A minimum pilot pressure of 5 bar must be applied to shift the poppet and allow forward flow. Control area A3 of 16.61 cm² determines the hydraulic force generated by that pilot pressure. Pilot volume at port X is 19.27 cm³, influencing how quickly the valve opens, while port Y holds 17.5 cm³ and governs closure speed. Ports A and B use a 1 7/8-12 UN thread so attachment to large hoses is secure. Pre-opening is specified as none, so no bypass flow is available before full actuation. The unit weighs 10 kg, providing rigid mounting without extra support.
Technical Specifications
Ambient Temp Minimum
-15 °C (FKM)
Cleanliness Class
ISO 4406 (c) 20/18/15
Connection Type
Threaded Connection
Control Area A3
16.61 cm2
Cracking Pressure
8.0 bar
Maximum Flow
550 l/min
Maximum Operating Pressure
315 bar
Minimum Pilot Pressure
5 bar
Nominal Size
32
Pilot Volume Port X
19.27 cm3
Pilot Volume Port Y
17.5 cm3
Port A,b Thread
1 7/8-12 UN
Pre-opening
None
Seal Material
FKM
Thread Standard
UNF/UN
Weight
10 kg
1620 Old Apex Road
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