PRESSURE RELIEF VALVE -Z ZDB6DB2-2X/350V

Manufacturer: Bosch Rexroth

Material #: R901423490

Model : ZDB6DB2-2X/350V

***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 ZDB6DB2-2X/350V (R901423490) is a high-performance industrial hydraulic valve designed for reliable pressure relief at set values. This direct-actuated valve features a spool symbol B T and is capable of handling a maximum pressure as specified in its product group ID. It comes with a number of ports and mechanical actuation, ensuring precise control over hydraulic systems. With a maximum flow rate as indicated, the ZDB6DB2-2X/350V is suitable for various types of connections, including interim assembly and complies with NFPA T.. R D Size CETOP D and ISO connection diagrams. This valve offers multiple switching positions and has a weight that reflects its robust construction. The seals are made from FKM, making the valve compatible with a wide range of hydraulic fluids such as HL, HLP, HLPD, HVLP, HVLPD, HETG, HEES, HEPG, HFDU, and HFDR. Pressure valves like the ZDB6DB2-2X/350V are known for their quick response time and virtually leakage-free operation. The seat design provides resistance against oil contamination while the integrated damping of the control spool ensures stable behavior and minimal pressure increase with rising flow rates. These valves come preset to the minimum possible pressure but can be adjusted to meet specific system requirements. The sandwich plate design allows for easy integration into hydraulic systems while protecting components from excessive pressures. Additional features include various adjustment types such as spindle with hexagon or rotary knob (lockable or non-lockable), circuit options, and a corrosion-protected design. This Bosch Rexroth valve is also equipped to accommodate monitoring capabilities via a pressure load cell at the measuring port for certain versions (MP, MA, MB), ensuring operational safety and performance reliability. With its robust design criteria and versatile application potential, this valve stands out as an essential component in advanced hydraulic systems.

$266.00 USD

More are expected on March 11, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as March 11, 2025 when ordered in

This product is eligible for factory repair.

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PRESSURE RELIEF VALVE -Z ZDB6DB2-2X/350V

Size 6, symbol B - T, with manual actuation

Industrial hydraulic valve in a high performance range. Reliable pressure limitation to setting value

Unpacked Weight: 1.240 kg

Sandwich plate valve Porting pattern according to ISO 4401-03-02-0-05 4 pressure ratings, optional 3 adjustment types, optionally:
• Spindle with hexagon
• Rotary knob
• Lockable rotary knob with scale 5 circuit options Corrosion-protected design

Pressure valves of type ZDB6D and Z2DB6D are direct operated pressure relief valves in sandwich plate design.

The valves basically consist of housing (1) with seat (2) and control spool (3). The system pressure is set via the adjustment type (4).

The valves are closed in their rest position and protect a hydraulic system and its components against excessive pressures.

These valves respond quickly, noiselessly and in a virtually leakage-free manner. Thanks to the seat design, they are resistant against oil contamination. The integrated damping of the control spool (3) ensures extremely stable behavior,

as well as a low pressure increase with increasing flow.

In the state as delivered, the valves are set to the minimum possible pressure. The system pressure applied to channel P acts on the control spool (3). If the system pressure increases above the set value, the control spool (3) opens and the hydraulic fluid flows from channel P in channel T. This limits the system pressure to the set value.

For versions “MP”, “MA” and “MB”, the set system pressure can be recorded and monitored using a pressure load cell at the measuring port (5) (see dimensions)

Type ZDB 6 DP2 …MP…

➀	component side
➁	plate side

On/off valve
Pressure relief valve
Spindle with hexagon
Size 6
Maximum operating pressure 350 bar
Maximum flow 60 l/min
Component series 2X

Data Sheet	Download Data Sheet
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual
Manual	Download Manual

Spool symbol	B – T
Max. pressure	350
Productgroup ID	9,10,11,12,13,14
Number of ports	4
Type of actuation	with manual actuation
Size	6
Max. flow	60
Type of connection	Sandwich plate
Connection diagram NFPA	NFPA T3.5.1 R2-2002 D03
Size_CETOP	D03
Connection diagram	ISO 4401-03-02-0-05
Number of switching positions	2
Weight	1.240
Seals	FKM
Hydraulic fluid	HL,HLP,HETG,HEES,HEPG,HFDU

01	02	03	04	05	06	07		08		09	10	11	12
Z		DB	6	D			–	2X	/

01	Sandwich plate valve	Z
02	1 pressure valve cartridge (only with version “A”, “B” and “P”)	no code
02	2 pressure valve cartridges (only with version “C” and “D”)	2
03	Pressure relief valve	DB
04	Size 6	6
05	Direct operated	D
Relief function from – to:
06	P – T	P
	A – T	A
	B – T	B
	A – T and B – T	C
	A – B and B – A (for possible adjustment types/pressure ratings, see below)	D
Adjustment type
07	Rotary knob	1
	Spindle with hexagon	2
	Lockable rotary knob with scale 1)	3
08	Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions)	2X
Pressure rating
09	Set pressure up to 50 bar	50
	Set pressure up to 100 bar	100
	Set pressure up to 200 bar	200
	Set pressure up to 350 bar	350
Pressure measuring port G1/4
10	Without pressure measuring port	no code
	With pressure measuring port in port P (version “P” only)	MP
	With pressure measuring port in port A (version “A” only)	MA
	With pressure measuring port in port B (version “B” only)	MB
Corrosion resistance
11	None	no code
11	Improved corrosion protection (240 h salt spray test according to EN ISO 9227); (only version "2")	J3
Seal material
12	NBR seals	no code
	FKM seals	V
	Observe compatibility of seals with hydraulic fluid used. (Other seals upon request)

1)	Key with material no. R900008158 is included in the scope of delivery.

Version “DD”
Adjustment type	Pressure rating
Adjustment type	„50“	„100“	„200“	„350“
“1” and “2”	✔	✔	✔	–
„3“	✔	✔	–	–

Notes:

For valve types for use in potentially explosive areas, refer to data sheet 07011. Preferred types and standard units are contained in the EPS (standard price list).

general

Type			ZDB6D	Z2DB6D
Weight (approx.)	Version “1” and “2”	kg	1.3	2.3
	Version "3"	kg	1.4	2.4
Installation position			any
Ambient temperature range		°C	-15 … +80

hydraulic

Pressure rating			bar	50	100	200	350
Maximum operating pressure	Version “P”, “A”, “B”, “C”	Port A	bar	350
		Port B	bar	350
		Port P	bar	350
		Port T 1)	bar	200
	Version “D”	Port A 1)	bar	200
		Port B 1)	bar	200
		Port P	bar	350
		Port T	bar	350
Return flow pressure				Ideally depressurized to the tank. Counter pressure adds to the set pressure.
Maximum set pressure			bar	50	100	200	350
Pressure change per rotation 2)			bar	7	14	27	46
Maximum flow			l/min	60
Hydraulic fluid				see table
Hydraulic fluid temperature range			°C	-15 … +80
Viscosity range 3)			mm²/s	10 … 500
Maximum admissible degree of contamination of the hydraulic fluid 4)				Class 20/18/15 according to ISO 4406 (c)

1)	Version “1” and “2”; 100 bar version “3”
2)	The information refers to calculated guidelines and is subject to tolerances. Completely unloaded valves may have an idle stroke of up to 2 rotations.
3)	Preferably 50 … 120 mm2/s
4)	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	Data sheet
Mineral oils		HL, HLP	NBR, FKM	DIN 51524	90220
Bio-degradable	Insoluble in water	HETG	FKM	ISO 15380	90221
		HEES	FKM
	Soluble in water	HEPG	FKM	ISO 15380
Flame-resistant	Water-free	HFDU (glycol base) 1)	FKM	ISO 12922	90222
		HFDU (ester base)	FKM
	Containing water	HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620 )	NBR	ISO 12922	90223
Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to the data sheets above or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! The ignition temperature of the hydraulic fluid used must be [si]50 K[/si][imp]90 °F[/imp] higher than the maximum solenoid surface temperature. Flame-resistant – containing water: Maximum operating pressure [si]210 bar[si][imp]3050 psi[/imp], otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100 % Maximum hydraulic fluid temperature [si]60 °C[/si][imp]140 °F[/imp] Bio-degradable and flame-resistant: If these hydraulic fluids are used, small amounts of dissolved zinc may get into the hydraulic system.

1)	Not recommended for corrosion-protected version "J3" (contains zinc)

For applications outside these parameters, please consult us!

(measured with HLP46, ϑOil = 40 ±5 °C)

∆p-qV characteristic curves

Pressure rating 50 bar

Pressure rating 100 bar

Pressure rating 200 bar

Pressure rating 350 bar

(➀ = component side, ➁ = plate side)

Version “P” (example with “MP”)

Version “A” (example with “MA”)

Version “B” (example with “MB”)

Version "C"

Version “D”

Version “P” and “B”

Dimensions in mm

➀	component side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø4 x 4 mm deep)
➁	plate side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, separate order, see accessories)

1	Name plate
2	Adjustment type "1"
3	Adjustment type “2” (spindle with external hexagon SW10 and lock nut SW24)
4	Adjustment type "3"
5	Valve mounting bores
6	Identical seal rings for ports A, B, P, T (plate side)
7	Space required to remove the key
8	Measuring port G1/4 (SW6 internal hexagon, tightening torque MA = 30 Nm ±10 %)
9	Protective cap (separate order, see accessories)

Type	L
	Version "P"	Version "B"
	mm	mm
ZDB6D	16	13
Z2DB6D	16	13

Valve mounting screws (separate order)

4 hexagon socket head cap screws ISO 4762 - M5 - 10.9

Notes:

Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve. The dimensions are nominal dimensions which are subject to tolerances.

Version "A"

Dimensions in mm

➀	component side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø4 x 4 mm deep)
➁	plate side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, separate order, see accessories)

1	Name plate
2	Adjustment type "1"
3	Adjustment type “2” (spindle with external hexagon SW10 and lock nut SW24)
4	Adjustment type "3"
5	Valve mounting bores
6	Identical seal rings for ports A, B, P, T (plate side)
7	Space required to remove the key
8	Measuring port G1/4 (SW6 internal hexagon, tightening torque MA = 30 Nm ±10 %)
9	Protective cap (separate order, see accessories)

Valve mounting screws (separate order)

4 hexagon socket head cap screws ISO 4762 - M5 - 10.9

Notes:

Version "C" and "D"

Dimensions in mm

➀	component side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø4 x 4 mm deep)
➁	plate side – porting pattern according to ISO 4401-03-02-0-05 (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, separate order, see accessories)

1	Name plate
2	Adjustment type "1"
3	Adjustment type “2” (spindle with external hexagon SW10 and lock nut SW24)
4	Adjustment type "3"
5	Valve mounting bores
6	Identical seal rings for ports A, B, P, T (plate side)
7	Space required to remove the key
9	Protective cap (separate order, see accessories)

Valve mounting screws (separate order)

4 hexagon socket head cap screws ISO 4762 - M5 - 10.9

Notes:

Denomination	Part number
Protective cap	R900131744
Locking pin ISO 8752-3x8-St	R900005694

PRESSURE RELIEF VALVE -Z ZDB6DB2-2X/350V

Manufacturer: Bosch Rexroth

Material #: R901423490

Model : ZDB6DB2-2X/350V

More are expected on March 11, 2025

This product is eligible for factory repair.

Type ZDB 6 DP2 …MP…

general

hydraulic

(measured with HLP46, ϑOil = 40 ±5 °C)

Pressure rating 50 bar

Pressure rating 100 bar

Pressure rating 200 bar

Pressure rating 350 bar

(➀ = component side, ➁ = plate side)

Version "C"

Version “D”

Version “P” and “B”

Version "A"

Version "C" and "D"

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