Pressure relief valve, direct controlled DB6D

Name: Pressure relief valve, direct controlled DB6D
Brand: Bosch Rexroth
SKU: RX7490

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Description

Size 6
Component series 1X
Maximum operating pressure 315 bar
Maximum flow 60 l/min

Features

For subplate mounting
3 pressure-adjustment elements, optionally:
• Sleeve with internal hexagon
• Rotary knob, lockable, with scale
• Rotary knob with scale

Product description

General

Pressure valves of type DB 6 D are direct operated pressure relief valves.

They are used for limiting the system pressure.

The pressure relief valves basically consist of the main valve (1) with main spool insert (2) and the pressure adjustment element (3).

The pressure applied to channel P acts on the main spool (2).

If the pressure in channel P exceeds the value set at the spring (5), the poppet (4) opens against the spring (5) and the main spool (2) is free to move accordingly against the spring. So hydraulic fluid flows over the control edge (6) out of channel P to T.

Type code

01	02	03	04	05	06		07		08	09	10	11
DB	6	D		W		–	1X	/		V		*

01	Pressure relief valve	DB
02	Size 6	6
03	direct operated	D
04	Pressure limitation in channel P	P
04	Pressure limitation in channel P and B	PB
05	Connection porting pattern according to ISO 6264	W
Adjustment elements
06	Sleeve with internal hexagon	2
	Rotary knob, lockable, with scale 1)	3
	Rotary knob with scale	7
07	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)	1X
08	max. adjustable pressure	80
	max. adjustable pressure	160
	max. adjustable pressure	315
09	FPM seals (other seals upon request)	V
09	Observe compatibility of seals with hydraulic fluid used.
10	Adjustment, horizontal	no code
10	Adjustment, vertical	W65
11	Further details in the plain text	*

1) 2H key is included in the scope of delivery

Technical data

general

Size			6
Weight	horizontal	kg	1.4
Weight	Vertical	kg	1.1
Installation position			any
Ambient temperature range		°C	-25 … +50
Anschlussart			Plate connection, porting pattern NG6, ISO 6264

hydraulic

Size		6
Maximum operating pressure	bar	315
Maximum set pressure	bar	80 160 315
Maximum flow	l/min	60
Hydraulic fluid		see table
Hydraulic fluid temperature range	°C	-25 … +80
Seals		FPM (Viton® Dupont)
Viscosity range	mm²/s	10 … 500
Maximum admissible degree of contamination of the hydraulic fluid 1)		Class 20/18/15 according to ISO 4406 (c)

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.

Hydraulic fluid		Classification	Suitable sealing materials	Standards
Mineral oil		HL, HLP	FKM, NBR	DIN 51524
Bio-degradable	Insoluble in water	HEES (synthetic esters)	FKM	VDMA 24568
	Insoluble in water	HETG (rape seed oil)	FKM, NBR	VDMA 24568
	Soluble in water	HEPG (polyglycols)	FKM	VDMA 24568
Other hydraulic fluids on request