REXROTH

SV6PB1-6X/ Hydraulic Check Valve R900494086

The Bosch Rexroth SV6PB1-6X/ hydraulic check valve, material number R900494086, is a pilot-operated check valve for hydraulic subplate mounting applications. Bosch Rexroth official Store identifies this item as HY-CHECK VALVE SV6PB1-6X/. For accurate purchasing and replacement, the complete model and material number should always be used together: SV6PB1-6X/ / R900494086.

According to Bosch Rexroth RE 21460 technical data, the SV and SL valve series are pilot-operated check valves. The size 6 version belongs to component series 6X and is designed for subplate mounting. The official data lists maximum operating pressure of 315 bar and maximum flow of 60 l/min. These values should be checked together with the hydraulic schematic, load pressure, pilot pressure, oil viscosity and machine operating conditions before replacement.

The complete model code SV6PB1-6X/ contains important configuration details. The S identifies a check valve. The V indicates internal pilot oil return. The 6 indicates size 6. The P indicates subplate mounting. The B version indicates without pre-opening. The 1 code identifies the cracking pressure version. The 6X section indicates component series 60 to 69, with unchanged installation and connection dimensions within the same component series range.

Bosch Rexroth technical data describes Type SV/SL isolator valves as pilot-operated check valves used for leakage-free blocking of one actuator port, including during longer standstill times. The valve basically consists of a housing, seat poppet, compression spring and control spool. In normal check-valve function, oil can flow freely in the permitted direction, while the reverse direction is hydraulically blocked until sufficient pilot pressure is applied.

The Bosch Rexroth SV6PB1-6X/ hydraulic check valve R900494086 is suitable for hydraulic circuits where an actuator must be held in position and protected against creeping movement. In practical hydraulic systems, pilot-operated check valves are commonly used to hold cylinders, block load pressure, isolate operating circuits and support safe positioning of hydraulic actuators when directional valves are in neutral or when the system is at standstill.

The subplate mounting design is important for installation. Bosch Rexroth official data for size 6 SV/SL valves lists porting patterns according to ISO 4401-03-02-0-05 and ISO 5781-03-04-0-00. This means the valve must be matched with the correct manifold, subplate or hydraulic control block interface. A visually similar check valve may not be interchangeable if the porting pattern, pilot oil return, pre-opening version, cracking pressure or seal material is different.

The B version in SV6PB1-6X/ indicates a valve without pre-opening. This detail should not be ignored because pre-opening affects decompression behavior and pilot opening characteristics. If the original valve is replaced by a version with different pre-opening or cracking pressure, the actuator may move differently, unloading behavior may change, or hydraulic shocks may occur.

For procurement teams and maintenance engineers, the key purchasing reference is the full Bosch Rexroth model SV6PB1-6X/ together with material number R900494086. Short descriptions such as “SV6 valve,” “Rexroth check valve” or “pilot check valve” are not enough for accurate replacement. Buyers should confirm the complete model code, material number, size 6, component series 6X, internal pilot oil return, subplate mounting, B version without pre-opening and cracking pressure code 1 before ordering.

Before purchasing the Bosch Rexroth SV6PB1-6X/ hydraulic check valve R900494086, users should compare the valve nameplate, hydraulic schematic, manifold interface and original machine spare-parts list. If the valve is installed on equipment, photos of the model marking, mounting face, port side and connected hydraulic block can help confirm whether this exact check valve is required.

Hydraulics Worldwide supplies hydraulic check valves, Bosch Rexroth valves, pumps and industrial spare parts for international customers. If you are sourcing the Bosch Rexroth SV6PB1-6X/ hydraulic check valve R900494086, send us the complete model code, required quantity and delivery destination for quotation support. You can also browse more hydraulic components from Hydraulics Worldwide or verify the manufacturer reference on the Bosch Rexroth official product page.

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