PRESSURE SEQUENCE VALVE DZ20-2-5X/315
Manufacturer: Bosch Rexroth
Material #: R900590623
Model : DZ20-2-5X/315
***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 DZ20-2-5X/315 (R900590623) is a high-performance industrial hydraulic valve, designed for reliable pressure sequencing and capable of mechanically actuated operations. This pilot-operated spool valve is distinguished by its robust construction and flexibility in application, serving as a preload, sequencing, and changeover valve suitable for subplate mounting. The valve's porting pattern adheres to the ISO standard, ensuring broad compatibility with various hydraulic systems.
Equipped with a maximum operating pressure of 315 bar and capable of handling a maximum flow rate specified by the manufacturer, the DZ20-2-5X/315 is built to manage demanding industrial tasks with precision. It features multiple adjustment types including a rotary knob, sleeve with hexagon and protective cap, lockable rotary knob with scale, or rotary knob with scale for versatile control according to user preference or application requirements. Additionally, an optional check valve can be incorporated to facilitate free return flow when necessary.
The DZ20-2-5X/315 operates by utilizing the pressure in channel A to act on both the main spool insert and pilot control valve through specific control lines. This action allows for controlled connection between channels A and B when set pressure values are exceeded. The thoughtful design ensures that leakage is internally managed or directed appropriately depending on the version of the valve used.
This Bosch Rexroth hydraulic valve is compatible with various hydraulic fluids such as HL, HLP, HLPD, HVLP, HVLPD, and HFC while employing NBR seals to maintain integrity under operational pressures. Its construction facilitates easy maintenance while providing consistent performance for industrial hydraulic systems requiring precise pressure control sequences.
$1,374.00 USD
More are expected on April 9, 2025
Status: This product is temporarily out of stock.
Qty: Delivered as early as April 9, 2025 when ordered in
This product is eligible for factory repair.
Size 20, A → B, mechanically actuated
Industrial hydraulic valve in a high performance range. Reliable pressure sequencing to setting.
Unpacked Weight: 5.200 kg
Suitable for use as preload, sequencing and changeover valve For subplate mounting Porting pattern according to ISO 5781 As cartridge valve 4 pressure ratings 4 adjustment types:
• Rotary knob
• Sleeve with hexagon and protective cap
• Lockable rotary knob with scale
• Rotary knob with scale Check valve, optional
The valve type DZ is a pilot-operated pressure sequence valve.
It is applied for pressure-dependent connection of a second system.
The pressure sequence valve basically consists of main valve (1) with main spool insert (7) and pilot control valve (2) with adjustment type and optional check valve (3).
According to the pilot oil supply and return and the respective function, the following differentiation is made:
Preload valve type DZ. . -.-5X/… (control lines 4.1, 12 and 13 open; control lines 4.2, 14 and 15 closed)
The pressure applied in channel A acts via the control line (4.1) on the pilot spool (5) in the pilot control valve (2). Simultaneously, the pressure in channel A acts via the nozzle (6) on the spring-loaded side of the main spool (7). If the pressure in channel P exceeds the value set at the spring (8), the pilot spool (5) is moved against the spring (8). The hydraulic fluid on the spring-loaded side of the main spool (7) now flows via the nozzle (9), the control edge (10) and control lines (11) and (12) into channel B. Due to this, a pressure drop occurs at the main spool (7). The main spool (7) is moved upwards and opens the connections from channel A to B. The pressure in channel A exceeds the value in channel B by the value set at the spring (8). The leakage occurring at the pilot spool (5) is directed internally via the spring chamber (17) of the pilot control valve and the control line (13) into channel B. If the pressure in the secondary circuit (channel B) exceeds the pressure in channel A, a check valve (3) may be optionally installed for free return flow.
Preload valve type DZ. . -.-5X/.X… (control lines 4.2, 12 and 13 open; control lines 4.1, 14 and 15 closed)
In principle, the function of this valve corresponds to the function of type DZ. . -.-5X/…. With version "X", however, the opening signal is received externally via control line X (4.2).
Sequence valve type DZ. . -.-5X/.Y… (control lines 4.1, 12 and 14 or 15 open; control lines 4.2 and 13 closed)
In principle, the function of this valve corresponds to the function of type DZ. . -.-5X/…. At version "Y", however, the leakage occurring at the pilot spool (5) has to be directed via line (14) or (15) to the tank by means of a depressurized connection. The pilot oil is directed via line (11) and (12) into channel B.
Circulation valve type DZ. . -.-5X/.XY… (control lines 4.2, 14 or 15 open; control lines 4.1, 12 and 13 closed)
In principle, the function of this valve corresponds to the function of type DZ. . -.-5X/…. With version "XY", however, the opening signal is received externally via control line X (4.2). The pilot oil at the pilot spool (16) bore and occurring leakage have to be directed via line (14) or (15) to the tank by means of a depressurized connection.
(measured with HLP46, ϑOil = 40 ±5 °C)
Inlet pressure dependent on the flow (A → B)
Minimum inlet pressure 1) dependent on the flow (A → B)
| 1) Circulation pressure with version "X" |
The characteristic curves apply to the pressure at the valve outlet pT = 0 bar across the entire flow range.
Circulation pressure dependent on the flow (A → B) (only version "XY")
Δp-qV characteristic curves via check valve (B → A)
Type DZ. . -.-5X/.M…
Type DZ. . -.-5X/.XM…
Type DZ. . -.-5X/.YM…
Type DZ. . -.-5X/.XYM…
Type DZ. . -.-5X/…
Type DZ. . -.-5X/.X…
Type DZ. . -.-5X/.Y…
Type DZ. . -.-5X/.XY…
Subplate mounting
Dimensions in mm
|
1 |
Name plate |
|
2.1 |
Port Y for external pilot oil return at version "XY" or spring chamber discharge at version "Y" |
|
2.2 |
Port Y (G1/4) optionally for external pilot oil return at version "XY" or spring chamber discharge at version "Y" |
|
4 |
Adjustment type "1" |
|
5 |
Adjustment type "2" |
|
6 |
Adjustment type "3" |
|
7 |
Adjustment type "7" |
|
8 |
Hexagon SW10 |
|
9 |
Space required to remove the key |
|
10 |
Identical seal rings for ports A and B |
|
11 |
Identical seal rings for ports X, Y, Y1 and Y2 |
|
12 |
Valve mounting bores |
|
13 |
Locking pin |
Cartridge valve
Dimensions in mm
|
1 |
Name plate |
|
2.2 |
Port Y (G1/4) optionally for external pilot oil return at version "XY" or spring chamber discharge at version "Y" |
|
3.1 |
Port Y1 at cartridge valve for pilot oil return at version "XY" or spring chamber discharge at version "no code", "X" and "Y" |
|
3.2 |
Port Y2 at cartridge valve for pilot oil return at version "no code", "X" and "Y" |
|
4 |
Adjustment type "1" |
|
5 |
Adjustment type "2" |
|
6 |
Adjustment type "3" |
|
7 |
Adjustment type "7" |
|
8 |
Hexagon SW10 |
|
9 |
Space required to remove the key |
|
11 |
Identical seal rings for ports X, Y, Y1 and Y2 |
|
12 |
Valve mounting bores |
|
14 |
Main spool insert with nozzle |
|
15 |
Seal ring (main spool) |
|
16 |
Support ring (main spool) |
Installation bore
Dimensions in mm
Dimensions in mm
|
17 |
Versions "X" and "XY" without bore |
|
18 |
Notice! |
|
19 |
Support ring and seal ring are to be inserted into this bore before assembly of the main spool. |
Subplates (separate order)
NG10G 460/01 (G3/8)
G 461/01 (G1/2)
NG25G 412/01 (G3/4)
G 413/01 (G1)
NG32G 414/01 (G1 1/4)
G 415/01 (G1 1/2)
Valve mounting screws (separate order)
For reasons of stability, exclusively the following valve mounting screws may be used:
Subplate mounting:
NG104 x ISO 4762 - M10 x 50 - 10.9-flZn-240h-L
at friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 60 Nm ±10 %,
material no. R913000471
NG254 x ISO 4762 - M10 x 60 - 10.9-flZn-240h-L
at friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 60 Nm ±10 %,
material no. R913000116
NG326 x ISO 4762 - M10 x 70 - 10.9-flZn-240h-L
at friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 60 Nm ±10 %,
material no. R913000126
Cartridge valve:
4 x ISO 4762 - M8 x 40 - 10.9-flZn-240h-L
at friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 31 Nm ±10 %,
material no. R913000205
The tightening torques are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ±10 %).
|
NG |
L1 |
L2 |
L3 |
L4 |
L5 |
L6 |
L7 |
L8 |
L9 |
L10 |
B1 |
B2 |
B3 |
B4 |
B5 |
H1 |
H2 |
H3 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 10 | 96 | 35.5 | 33 | 42.9 | 21.5 | - | 7.2 | 21.5 | 31.8 | 35.8 | 85 | 50 | 66.7 | 58.8 | 7.9 | 112 | 92 | 28 |
| 25 | 116 | 37.5 | 35.4 | 60.3 | 39.7 | - | 11.1 | 20.6 | 44.5 | 49.2 | 102 | 59.5 | 79.4 | 73 | 6.4 | 122 | 102 | 38 |
| 32 | 145 | 33 | 29.8 | 84.2 | 59.5 | 42.1 | 16.7 | 24.6 | 62.7 | 67.5 | 120 | 76 | 96.8 | 92.8 | 3.8 | 130 | 110 | 46 |
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