PROPORTIONAL PRESSURE RELIEF VALVE KBPSP8AA/HCG12K4V

Manufacturer: Bosch Rexroth

Material #: R901069317

Model : KBPSP8AA/HCG12K4V

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth KBPSP8AA/HCG12K4V (R901069317) is a high-performance screwin cartridge valve specifically designed for precise pressure control in hydraulic systems. This direct-operated proportional pressure relief valve, belonging to the KBPS product family, features an increasing characteristic curve that allows for smooth and accurate adjustments to system pressure. It is engineered with a maximum operating pressure of 350 bar (5076 psi) and a maximum flow of 8 l/min (2.11 gpm), ensuring compatibility with a range of demanding applications. The valve's SUN TA cavity design facilitates easy installation, while its electroproportional actuation via an integrated coil ensures responsive control over pressure settings. The KBPSP8AA/HCG12K4V uses FKM sealing material for enhanced durability and chemical resistance, making it suitable for use with various hydraulic fluids such as HL, HLP, HLPD, HVLP, HVLPD, HEES, HEPR, HEPG, HFDU, HFDR, and HFAS. Equipped with a DIN EN 175301-803 A electrical connector for secure electrical connections, the valve also features a poppet-type spool that maintains its normally closed position until actuated. The component series A denotes the latest iteration of this model with improved capabilities over previous versions. In case of power failure or when no command value is present, the valve automatically sets itself to a minimum pressure setting for safety and system protection. This Bosch Rexroth proportional valve stands out due to its fine-tuning capability from outside the control electronics, allowing operators to precisely adjust the command value pressure characteristic curve according to specific requirements. With its robust design and versatile performance characteristics, the KBPSP8AA/HCG12K4V is an essential component in advanced hydraulic systems requiring reliable and adjustable pressure relief functionalities.

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PROPORTIONAL PRESSURE RELIEF VALVE KBPSP8AA/HCG12K4V

Unpacked Weight: 0.46 kg

Cartridge valve Mounting cavity R/T-8A Direct operated proportional valve for system pressure limitation Actuation by proportional solenoid with central thread and detachable coil Fine adjustment of the command value pressure characteristic curve possible from the outside at the control electronics In case of power failure, minimum set pressure

Valves of type KBPS.8A are direct operated proportional pressure relief valves (pilot control valves) in seat design and are used to limit a system pressure. With a command value of 0 or in case of power failure, the minimum pressure is set. Operation by means of a proportional solenoid with central thread and detachable coil. The solenoid's interior is connected to the main port and filled with hydraulic fluid. Dependent on the electric command value, these valves can be used to steplessly set the system pressure to be limited.

Screw-in cartridge valve
Maximum operating pressure 420 bar (6000 psi)
Maximum flow 2 l/min (0,5 gpm)
Cavity SUN T-8A

Max. pressure	420
Coil	GP37
Product family classification	Proportional pressure relief valve, direct operated, increasing characteristic curve
Productgroup ID	9,10,11,12,13,14
Product family type	KBPS
Ports number	2
Type of actuation	Electro-proportional
Sealing material	FKM
Cavity	Sun T-8A
Product type	KBPS
Electrical connector	DIN EN 175301-803
Max. flow	2
Type of connection	Screw-in cartridge valve
Normal position	Normally closed
Nominal flow	2
Direct - Pilot	Direct acting
Product family	Relief
Supply voltage	12 V DC
Coil integrated	Integrated coil
Spool Poppet	Poppet type
Weight	0.46
Hydraulic fluid	HL,HLP,HLPD,HVLP,HVLPD,HEES,HEPR,HEPG,HFDU,HFDR,HFAS

01	02	03	04	05		06	07	08	09	10	11	12
KBPS		8	A	A	/	H	C			V		*

01	Proportional pressure relief valve, direct operated (pilot control valve)	KBPS
Pressure rating
02	Up to 30 bar	B
	Up to 50 bar	C
	Up to 100 bar	F
	Up to 150 bar	H
	Up to 210 bar	L
	Up to 250 bar	N
	Up to 315 bar	P
	Up to 350 bar	R
	Up to 420 bar	T
03	Component size	8
04	Minimum pressure with command value = 0	A
05	Component series	A
06	High Performance and mounting cavity R/T-8A (see mounting cavity)	H
07	Proportional solenoid, wet-pin	C
Power supply
08	Control electronics 12 V DC	G12
08	Control electronics 24 V DC	G24
Electrical connection
09	Without mating connector, with connector according to DIN EN 175301-803, separate order	K4
	Without mating connector, with connector DT 04 - 2PA (Deutsch plug)	K40
	Without mating connector, with connector AMP Junior-Timer	C4
Seal material
10	FKM seals	V
11	Standard version	no code
11	800 mA coil	-8
12	Further details in the plain text	*

For applications outside these parameters, please consult us!

general

Type		KBPS.8A
Size		8
Component series		A
Weight	kg	0.45
Installation position		any - if it is ensured that no air can collect upstream of the valve. Otherwise, we recommend suspended installation of the valve.
Ambient temperature range	°C	-20 … +120

hydraulic

Type			KBPS.8A
Maximum flow		l/min	2
Hydraulic fluid temperature range		°C	-20 … +80
Viscosity range		mm²/s	15 … 380
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1)			Class 20/18/15 according to ISO 4406 (c)
Hysteresis 2)		%	< 5
Range of inversion 2)		%	< 0.5
Response sensitivity 2)		%	< 0.5
Manufacturing tolerance of the command value pressure characteristic curve, related to 0.8 l/min; pressure increasing	at command value 100 % 2)	%	< 5
Step response	0% → 100% 3)	ms	70
Step response	100% → 0% 3)	ms	70

1)	The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter.
2)	Of the maximum set pressure
3)	depending on the system