Pressure sequence valve, direct operated ZDZ 6 D

Артикул: RX7518

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Pressure sequence valve, direct operated ZDZ 6 D

Name: Pressure sequence valve, direct operated ZDZ 6 D
Brand: Bosch Rexroth
SKU: RX7518

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Description

Size 6
Component series 4X
Maximum operating pressure 210 bar
Maximum flow 60 l/min

Features

Sandwich plate valve
Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole)
4 pressure ratings
4 optional adjustment types:
• Rotary knob
• Threaded pin with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale
Check valve, optional (version “A” only)

Product description

Valve type ZDZ is a direct operated pressure sequence valve in sandwich plate design. It is used for the pressure-dependent connection of a second system. The sequencing pressure is set via the adjustment type (4).

Version "P"

The compression spring (3) holds the control spool (2) in the initial position – the valve is blocked. The pressure in channel P➁ is applied via the control line (5) at the spool face of the control spool (2) opposite the compression spring (3).

If channel P➁ reaches the set value of the compression spring (3), the control spool (2) is moved to the left and the connection from P➁ to P➀ is opened. The system connected to channel P➀ is connected without a pressure drop in channel P➁.

The pilot oil return from the spring chamber (7) is always realized externally via the bore (6) to channel T (Y).

A pressure gauge connection (8) enables control of the sequencing pressure at the valve.

Version "A"

Here, pressure sequencing is realized in channel A. Control signal and pilot fluid are supplied internally from channel A➀.

A check valve can be optionally installed for free hydraulic fluid return flow from A➁ to A➀.

Type ZDZ 6 DP1–4X/…YM…

Type ZDZ 6 DA1–4X/…YM

➀	component side
➁	plate side

Type code

01	02	03	04	05	06		07		08	09	10	11	12	13
Z	DZ	6	D			–	4X	/		Y				*

01	Sandwich plate valve	Z
02	Sequence valve	DZ
03	Size 6	6
04	Direct operated	D
05	Pressure limitation in channel P➀	P
05	Pressure limitation in channel A➁	A
Adjustment type
06	Rotary knob	1
	Grub screw with hexagon and protective cap	2
	Lockable rotary knob with scale 1)	3
	Rotary knob with scale	7
07	Component series 40 … 49 (40 … 49: unchanged installation and mounting dimensions)	4X
Pressure rating
08	Maximum sequencing pressure 25 bar	25
	Maximum sequencing pressure 75 bar	75
	Maximum sequencing pressure 150 bar	150
	Maximum sequencing pressure 210 bar	210
09	Internal pilot oil supply, external pilot oil return	Y
10	With check valve 2)	no code
10	Without check valve	M 3)
Seal material
11	NBR seals	no code
	FKM seals	V
	Observe compatibility of seals with hydraulic fluid used.
12	Without locating hole	no code
12	With locating hole	/60 4)
13	Further details in the plain text	*

1)	H-Key with material no. R900008158 is included in the scope of delivery.
2)	Only version "A"
3)	Locking pin ISO 8752-3x8-St, material no. R900005694 (separate order)

Technical data

general

Size			6
Weight (approx.)		kg	1.2
Installation position			any
Ambient temperature range	NBR seals	°C	-30 … +80
Ambient temperature range	FKM seals	°C	-20 … +80

hydraulic

Size			6
Maximum operating pressure	Port P	bar	210
	Anschluss A	bar	210
	Port B	bar	210
	Port T (Y)	bar	160
Maximum sequencing pressure		bar	25 75 150 210
Maximum flow		l/min	60
Hydraulic fluid			see table
Hydraulic fluid temperature range	NBR seals	°C	-30 … +80
Hydraulic fluid temperature range	FKM seals	°C	-20 … +80
Viscosity range		mm²/s	10 … 800
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	Data sheet
Mineral oils		HL, HLP, HLPD	NBR, FKM	DIN 51524	90220
Bio-degradable	Insoluble in water	HETG	FKM	ISO 15380	90221
	Insoluble in water	HEES	FKM	ISO 15380
	Soluble in water	HEPG	FKM	ISO 15380
Flame-resistant	Water-free	HFDU (glycol base)	FKM	ISO 12922	90222
		HFDU (ester base)	FKM
		HFDR	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 50 K higher than the maximum surface temperature. Flame-resistant – containing water: Maximum pressure differential 210 bar, otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100% Maximum hydraulic fluid temperature 60 °C Bio-degradable and flame-resistant: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system.

(For applications outside these values, please consult us!)

Diagrams/characteristic curves

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

Δp-qV characteristic curves

Version "P"

Δp-qV characteristic curves

Version "A"

p-qV characteristic curves

Version "P"

p-qV characteristic curves

Version "A"

1	P➀ to P➁
2	A➀ to A➁
3	A➁ to A①; flow only via check valve

Notes:

The characteristic curves apply to the pressure at the valve output pT = 0 bar across the entire flow range.

Symbols/Circuit diagrams

Version "A...Y"

Version "A...YM"

Version "P...YM"

Dimensions

Version "P"

Dimensions in mm


Required surface quality of the valve contact surface

➀	component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep)
➁	plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order)
1	Name plate
2	Adjustment type "1"
3	Adjustment type "2"
4	Adjustment type "3"
5	Adjustment type "7"
6	Dimensions required to remove the key
7	Valve mounting bores
8	Lock nut SW24
9	Hexagon SW10
10	Identical seal rings for ports A➁, B➁, P➁, T➁(Y)
11	Pressure gauge connection G1/4; 12 mm deep; internal hexagon SW6

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


Required surface quality of the valve contact surface

➀	component side – porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø4 x 4 mm deep)
➁	plate side – Porting pattern according to ISO 4401-03-02-0-05 (with or without locating hole); (with locating hole Ø3 x 5 mm deep for locking pin ISO 8752-3x8-St, material no. R900005694, separate order)
1	Name plate
2	Adjustment type "1"
3	Adjustment type "2"
4	Adjustment type "3"
5	Adjustment type "7"
6	Dimensions required to remove the key
7	Valve mounting bores
8	Lock nut SW24
9	Hexagon SW10
10	Identical seal rings for ports A➁, B➁, P➁, T➁(Y)
11	Pressure gauge connection G1/4; 12 mm deep; internal hexagon SW6

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.

Downloads

Pressure sequence valve, direct operated
Data Sheet | RE26088 | 2018-01-01 | English | PDF | 478k
Product Groups: Direct operated
Type ZDZ

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