Bosch Rexroth | SL10GB1-4X
SL10GB1-4X/
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The SL10GB1-4X/ valve belongs to the Hy-Check Valves series and is manufactured by Bosch Rexroth. It serves hydraulic automation circuits by preventing backflow until a pilot signal releases the poppet. Its nominal size is 10, matching NG10 porting standards. A threaded connection design simplifies in-line mounting, and the A and B ports use a G 1/2 thread compatible with common pipe fittings. The housing tolerates up to 350 bar maximum operating pressure, while a 1.5 bar cracking pressure keeps the passage sealed under low differential pressures. Pilot actuation demands at least 5 bar, and the 1.33 cm² control area sets the pilot force needed to shift the poppet. Because the valve has no pre-opening feature, flow remains blocked until full pilot pressure is available.
Pilot volumes of 2.5 cm³ at port X and 2.0 cm³ at port Y specify the amount of oil displaced during opening, which influences response time. An external pilot oil return eliminates back pressure that could slow closing. Cleanliness class 20/18/15 per ISO 4406 limits particle contamination that might score sealing surfaces. The unit can be installed in any orientation, easing placement in crowded manifolds. Its calculated MTTFd of 150 years indicates a long statistical service life in safety-related circuits. The threaded version weighs 2.1 kg, facilitating manual handling during service. Direction of flow is defined as A→B free and B→A when opened, so technicians can route lines correctly during installation.
Technical Specifications
A,b Port Thread
G 1/2
Cleanliness Class (iso 4406 (c))
20/18/15
Control Area A1
1.33 cm2
Cracking Pressure
1.5 bar
Direction Of Flow
A→B Free, B→A When Opened
Installation Position
Any
Max Operating Pressure
350 bar
Min Pilot Pressure
5 bar
Mttfd Value
150 years
Nominal Size
10 (NG10)
Pilot Oil Return
External
Pilot Volume Port X
2.5 cm3
Pilot Volume Port Y
2.0 cm3
Pre-opening
None
Type Of Connection
Threaded
Weight (threaded Connection)
2.1 kg
1620 Old Apex Road
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