DA20-1-5X/315-17YV/12
Manufacturer: Bosch Rexroth
Material #: R978901377
Model : DA20-1-5X/315-17YV/12
***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 DA20-1-5X/315-17YV/12 (R978901377) is a sophisticated pilot-operated pressure cutoff valve specifically designed for hydraulic accumulator charging circuits. Its primary function is to fill an accumulator until a preset charging pressure is reached, at which point it diverts the flow to prevent overcharging and resumes the process once the pressure drops by a set differential. This valve features a main housing, pilot control valve, main spool insert, and check valve, ensuring reliable operation and flow switching from P to B and P to T.
The DA20-1-5X/315-17YV/12 operates by delivering pump flow through the check valve into the hydraulic system from P to A. The pressure in channel A affects the control spool in the pilot control valve while simultaneously being applied in channel P through a nozzle to the spring-loaded side of the main spool. When the system reaches the top cutoff pressure, set via an adjustment spindle on the screw-in cartridge valve, it opens a connection allowing for internal or external flow from P to T.
This model includes a feature that allows for potential switching shock damping by increasing circulation pressure due to its strategically placed nozzle. It also offers flexibility with an adjustable switching pressure differential that can be modified according to system requirements. Furthermore, this version of the valve provides indirect pressure limiting functions through its components and does not include direct pump pressure limiting capabilities.
For circuit design considerations with type DAC models, it's important to note that ports for actuator A, pump P, tank T, control lines as well as check valves are not provided with this product and must be selected based on size and flow requirements. The DA20-1-5X/315-17YV/12 can be mounted as a subplate or used as a cartridge valve with various adjustment types available such as rotary knobs or solenoid-operated unloading options. It supports maximum operating pressures up to bar levels and can handle maximum flows measured in liters per minute, making it suitable for high-demand hydraulic systems.
$2,735.09 USD
Availability: Backordered
Ships from US Note: Sales tax, shipping, and applicable tariffs will be calculated at checkout.
Qty:
Delivered as early as March 8, 2027
$2,871.84 USD
Availability: Backordered
Ships from CA Note: Sales tax, shipping, and applicable tariffs will be calculated at checkout.
Qty:
Delivered as early as March 8, 2027
This product is eligible for factory repair.
Type DA…FS… (freely adjustable switching pressure differential)
The pressure valve type DA is a pilot-operated pressure cut-off valve. For example, it is used in accumulator charging circuits. Here, an accumulator is filled until the accumulator charging pressure is reached. After reaching the accumulator pressure, the valve switches the flow to depressurized circulation until the pressure in the hydraulic system has fallen by the switching pressure differential. Afterwards, the charging process is started again.
The pressure cut-off valve generally consists of main housing (1), pilot control valve (2 and 3), main spool insert (4) and check valve (7).
Switching of the pump flow from P to B to P to T.The pump delivers via the check valve (7) into the hydraulic system (P to A). The pressure applied in channel A acts via the control line (8) on the control spool in the pilot control valve (3). Simultaneously, the pressure in channel P is applied via nozzle (5) to the spring-loaded side of the main spool (4) and via the control line (9) and at the inlet (11) of the screw-in cartridge valve (3). As soon as the top cut-off pressure set at the screw-in cartridge valve (3) by means of the adjustment spindle (12) is reached in the hydraulic system, the screw-in cartridge valve opens the connection from the spring-loaded side of the main spool (4) to the return line (10) to T internally (type DA ...) or externally via port Y (type DA ...Y).
Due to the nozzle (5), a pressure drop occurs at the main spool (4). It is lifted from the seat and opens connection P to T. The check valve (7) closes the connection from P to A. The actuator pressure A holds the screw-in cartridge valve (3) in open position.
Switching of the pump flow from P to T to P to A.If the actuator pressure A has fallen to the pressure value set at the adjustment spindle (14), the screw-in cartridge valve (3) switches to initial position and closes the connection from the spring-loaded side of the main spool (4) to the return line (10). This way, the pressure on the spring-loaded side of the main spool (4) is increased and the connection from P to T is closed by the compression spring (6). The pump again delivers via the check valve (7) into the hydraulic system from P to A.
Version "FSB07"
The nozzle of this valve is located in the control line (11) for potential switching shock damping. This way, the circulation pressure (P to T) is increased. See characteristic curves.
Type DA 10 -2-5X/.FS…
Notices!
Only indirect pressure limiting function:A pressure limiting function of the pump pressure (to the tank) is not directly provided but only indirectly via the check valve (7), control line (8) and pilot control valve (2) to channel T.
Setting the switching pressure differentialAt the factory, the valves are set at nominal pressure to a switching pressure differential of approx. 10 % to 12 %. A setting of 50 % of the nominal pressure is possible.
On delivery, the adjustment spindle (12) is screwed out and set to the minimum adjustable switching pressure.
By screwing in the adjustment spindle (12), the top switching pressure may be increased.
The switching pressure differential is adjusted via the adjustment spindle (14): Screw out to reduce, screw in to increase.
The pressure adjustments are secured via the clamping screw (13) and lock nut (15).
Different system conditions (particularly high pump and actuator flows) may lead to higher switching pressures than indicated in the characteristic curves. Here, the valve offers the possibility of optional adjustment of the switching pressure differential to the system.Type DA… (fixed switching pressure differential 10 % or 17 %)
The function of this valve complies with the function of version "FS". At the pilot control valve, however, only the top switching pressure and not the switching pressure differential can be set.
The pilot spool surface (16) exceeds the effective ball (17) surface optionally by 10 % or 17 %.
This way, the effective force at the pilot spool (16) exceeds the effective force at the ball (17) by 10 % or 17%.
Switching of the pump flow from P to B to P to T.The pressure in channel P is applied via nozzles (5) and (9) to the spring-loaded side of the main spool (4) and at ball (17) in the pilot control valve (2). As soon as the cut-off pressure set at the adjustment spindle (12) is reached in the hydraulic system, the ball (17) opens against the spring (18). The hydraulic fluid now flows via nozzles (5) and (9) into the spring chamber (19) to the return line (10) to T (type DA ...) or externally via port Y (type DA ...Y). The main spool (4) is lifted from the seat and opens connection P to T. The check valve (7) closes the connection from P to A. Via the pilot spool (16), the actuator pressure A holds the ball in the pilot control valve (2) in open position.
Switching of the pump flow from P to T to P to A.If the actuator pressure A drops by the switching pressure differential range of 10 % or 17 % in comparison with the set cut-off pressure (according to characteristic curves on page 11), the spring (18) closes the ball (17) in the pilot control valve (2). This way, the pressure on the spring-loaded side of the main spool (4) is increased and the connection from P to T is closed by the compression spring (6). The pump again delivers via the check valve (7) into the hydraulic system from P to A.
Type DA 10 -1-5X/…
Type DAC…
Pressure cut-off valve type DAC 30 …FS…
This valve consists of pilot control housing (2), screw-in cartridge valve (3) as pilot control element and a main spool insert (4).
Pressure cut-off valve type DAC …10/17...
This valve consists of pilot control valve (2) and an optional main spool insert (4).
Information for circuit design with type DAC...
The ports required for actuator (A), pump (P) and tank (T), the required control lines (8) and (10) as well as the required check valve (7) are not included in the scope of delivery. These have to be selected according to the applicable size and the flow. Connections require sufficient cross-section and blocking has to be prevented by appropriate design and layout. Between actuator (A) and pump (P), a sufficiently dimensioned check valve with flow characteristics in compliance with or exceeding the characteristic curves specified on page 12 has to be applied.(measured with HLP46, ϑOil = 40 ±5 °C)
Size 10
Circulation pressure dependent on flow qV P and damping (P → T)
Size 25
Circulation pressure dependent on flow qV P and damping (P → T)
Size 32
Circulation pressure dependent on flow qV P and damping (P → T)
Notice!
The flow depends on the set switching pressure differential.
Pressure rating 50 bar
Switching pressure differential (P → A) dependent on the cut-off pressure pO (type DA …)
Pressure rating 100 bar
Switching pressure differential (P → A) dependent on the cut-off pressure pO (type DA …)
Pressure rating 200 bar
Switching pressure differential (P → A) dependent on the cut-off pressure pO (type DA …)
Pressure rating 315 bar
Switching pressure differential (P → A) dependent on the cut-off pressure pO (type DA …)
Switching pressure differential (P → A); pressure adjustment range pU dependent on the cut-off pressure pO (type DA …FS)
Size 10
Δp-qV characteristic curves via check valve (P → A)
Size 25
Δp-qV characteristic curves via check valve (P → A)
Size 32
Δp-qV characteristic curves via check valve (P → A)
|
1 |
Minimum switching pressure differential |
|
2 |
Maximum switching pressure differential |
|
3 |
Pressure adjustment range pU |
Type DA …
Type DA …Y…
Type DA …FS…
Type DA …FS.Y…
Type DAC 30 …FS…
Type DAC 30 …FS.Y…
Hydraulic system with hydraulic accumulator
Hydraulic system with high- and low-pressure pump
Application notes:
Reduce the tubing between pressure cut-off valve and hydraulic accumulator to a minimum! In case of high line resistance, use version "DA.../SO80" (separate control line from pilot control valve to hydraulic accumulator)! In case of high pump flow and low switching pressure differential (10 %), version "Y" should be preferred.Attention!
Accumulators may only be operated with suitable accumulator safety equipment! Version "FS" does not directly provide a pressure limiting function of the pump pressure (to the tank) but only indirectly via the check valve and the control line in the actuator channel. Observe the safety instructions on circuit design!|
1 |
to actuator |
|
2 |
High-pressure pump |
|
3 |
Low-pressure pump |
Type DA…FS, NG10; subplate mounting
Dimensions in mm
|
1 |
Name plate |
|
2 |
Y port for pilot oil return, external |
|
4 |
Adjustment type "2" |
|
8 |
Hexagon SW10 |
|
10 |
Locking pin |
|
11 |
Space required to remove the mating connector |
|
12 |
Mating connector without circuitry (separate order) |
|
13 |
Mating connector with circuitry (separate order) |
|
14 |
Directional spool valve NG6 |
|
15 |
Dimension for solenoid without manual override |
|
16 |
Dimension for solenoid with manual override “N” |
|
24 |
Omitted with internal pilot oil return |
|
25 |
Identical seal rings for ports A, P, T |
|
26 |
Integrated check valve |
|
28 |
Valve mounting bores (valve mounting screws, see dimensions) |
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M10 x 50 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 59 Nm ± 10 %,
material no. R913000471
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M10 x 50 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 59 Nm ± 10 %,
material no. R913000471
Type DA…, NG10; subplate mounting
Dimensions in mm
|
1 |
Name plate |
|
2 |
Y port for pilot oil return, external |
|
3 |
Adjustment type "1" |
|
4 |
Adjustment type "2" |
|
5 |
Adjustment type "3" |
|
6 |
Adjustment type "7" |
|
7 |
Lock nut SW22 |
|
8 |
Hexagon SW10 |
|
9 |
Space required to remove the key |
|
10 |
Locking pin |
|
11 |
Space required to remove the mating connector |
|
12 |
Mating connector without circuitry (separate order) |
|
13 |
Mating connector with circuitry (separate order) |
|
14 |
Directional spool valve NG6 |
|
15 |
Dimension for solenoid without manual override |
|
16 |
Dimension for solenoid with manual override “N” |
|
24 |
Omitted with internal pilot oil return |
|
25 |
Identical seal rings for ports A, P, T |
|
26 |
Integrated check valve |
|
28 |
Valve mounting bores (valve mounting screws, see dimensions) |
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M10 x 50 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 59 Nm ± 10 %,
material no. R913000471
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M10 x 50 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 59 Nm ± 10 %,
material no. R913000471
Type DA…FS, NG25 and 32; subplate mounting
Dimensions in mm
|
1 |
Name plate |
|
2 |
Y port for pilot oil return, external |
|
4 |
Adjustment type "2" |
|
8 |
Hexagon SW10 |
|
11 |
Space required to remove the mating connector |
|
12 |
Mating connector without circuitry (separate order) |
|
13 |
Mating connector with circuitry (separate order) |
|
14 |
Directional spool valve NG6 |
|
15 |
Dimension for solenoid without manual override |
|
16 |
Dimension for solenoid with manual override “N” |
|
24
|
Omitted with internal pilot oil return |
|
25 |
Identical seal rings for ports A, P, T |
|
27 |
Check valve (sandwich plate) |
|
28 |
Valve mounting bores (valve mounting screws, see dimensions) |
Valve mounting screws (separate order)
NG25:4 hexagon socket head cap screws ISO 4762 - M16 x 100 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 200 Nm ± 10 %,
material no. R913000558
2 hexagon socket head cap screws ISO 4762 - M16 x 60 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA = 200 Nm ± 10 %,
material no. R913000031
NG32:
4 hexagon socket head cap screws M18 x 120 - DIN 912-10.9
Friction coefficient µtotal = 0.12 to 0.17,
Tightening torque MA = 300 Nm ± 10 %,
material no. R900003282
2 hexagon socket head cap screws M18 x 80 - DIN 912-10.9
Friction coefficient µtotal = 0.12 to 0.17,
Tightening torque MA = 300 Nm ± 10 %,
material no. R900003279
Type DA…, NG25 and 32; subplate mounting
Dimensions in mm
|
1 |
Name plate |
|
2 |
Y port for pilot oil return, external |
|
3 |
Adjustment type "1" |
|
4 |
Adjustment type "2" |
|
5 |
Adjustment type "3" |
|
6 |
Adjustment type "7" |
|
7 |
Lock nut SW22 |
|
8 |
Hexagon SW10 |
|
9 |
Space required to remove the key |
|
11 |
Space required to remove the mating connector |
|
12 |
Mating connector without circuitry (separate order) |
|
13 |
Mating connector with circuitry (separate order) |
|
14 |
Directional spool valve NG6 |
|
15 |
Dimension for solenoid without manual override |
|
16 |
Dimension for solenoid with manual override “N” |
|
24 |
Omitted with internal pilot oil return |
|
25 |
Identical seal rings for ports A, P, T |
|
27 |
Check valve (sandwich plate) |
|
28 |
Valve mounting bores (valve mounting screws, see dimensions) |
Type DAC 30 …FS; cartridge valve
Dimensions in mm
|
1 |
Name plate |
|
2 |
Y port for pilot oil return, external |
|
4 |
Adjustment type "2" |
|
8 |
Hexagon SW10 |
|
11 |
Space required to remove the mating connector |
|
12 |
Mating connector without circuitry (separate order) |
|
13 |
Mating connector with circuitry (separate order) |
|
14 |
Directional spool valve NG6 |
|
15 |
Dimension for solenoid without manual override |
|
16 |
Dimension for solenoid with manual override “N” |
|
17 |
Identical seal rings for ports A, Y |
|
18 |
Main piston |
|
19 |
O-ring |
|
20 |
O-ring |
|
21 |
O-ring |
|
22 |
Support ring |
|
23 |
Support ring |
|
28 |
Valve mounting bores (valve mounting screws, see dimensions) |
|
29 |
Tightening torque MA = 60 Nm |
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M8 x 50 - 10.9-flZn-240h-L
at friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 30 Nm ± 10 %,
material no. R913000543
Type DAC and DAC 30; cartridge valve
Dimensions in mm
|
1 |
Name plate |
|
2 |
Y port for pilot oil return, external |
|
3 |
Adjustment type "1" |
|
4 |
Adjustment type "2" |
|
5 |
Adjustment type "3" |
|
6 |
Adjustment type "7" |
|
7 |
Lock nut SW22 |
|
8 |
Hexagon SW10 |
|
9 |
Space required to remove the key |
|
11 |
Space required to remove the mating connector |
|
12 |
Mating connector without circuitry (separate order) |
|
13 |
Mating connector with circuitry (separate order) |
|
14 |
Directional spool valve NG6 |
|
15 |
Dimension for solenoid without manual override |
|
16 |
Dimension for solenoid with manual override “N” |
|
17 |
Identical seal rings for ports A, Y |
|
18 |
Main piston |
|
19 |
O-ring |
|
20 |
O-ring |
|
21 |
O-ring |
|
22 |
Support ring |
|
23 |
Support ring |
|
28 |
Valve mounting bores (valve mounting screws, see dimensions) |
Valve mounting screws (separate order)
4 hexagon socket head cap screws
ISO 4762 - M8 x 40 - 10.9-flZn-240h-L
at friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 30 Nm ± 10 %,
material no. R913000205
Installation bore
Dimensions in mm
Dimensions in mm
|
1 |
Bore Ø32 mm can cut into Ø45 mm at any position. However, it must be observed that connection bore A and the mounting bores are not damaged! |
|
2 |
Support ring and seal rings are to be inserted into this bore before assembly of the main spool! |
|
3 |
Check valve (separate order). For positioning of the check valve and pilot oil bore, sufficient clearance to the main spool insert is to be ensured. |
|
NG |
L1 |
L2 |
L3 |
L4 |
L5 |
L6 |
L7 |
L8 |
L9 |
B1 |
B2 |
H1 |
H2 |
H3 |
H4 |
H5 |
ØD1 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 25 | 149 | 19 | 101.6 | 57.1 | 12.7 | 46 | 112.7 | 15.5 | 41.5 | 100 | 70 | 154 | 129 | 72 | 46 | 28 | 18 |
| 32 | 190 | 34 | 127 | 63.5 | 12.7 | 50.8 | 139.7 | 26 | 66.5 | 116 | 82.5 | 175 | 150 | 93 | 67 | 45 | 20 |
|
NG |
L1 |
L2 |
L3 |
L4 |
L5 |
L6 |
L7 |
L8 |
L9 |
B1 |
B2 |
H1 |
H2 |
H3 |
H4 |
H5 |
ØD1 |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 25 | 149 | 19 | 101.6 | 57.1 | 12.7 | 46 | 112.7 | 12 | 42 | 100 | 70 | 144 | 124 | 72 | 46 | 28 | 18 |
| 32 | 190 | 34 | 127 | 63.5 | 12.7 | 50.8 | 139.7 | 22.5 | 63 | 115 | 82.5 | 165 | 145 | 93 | 67 | 45 | 20 |
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
Mating connectors for valves with connector “K4”, without circuitry, standard
3P Z4
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
Mating connectors for valves with connector “K4”, with indicator light
3P Z5L
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
Mating connectors for valves with connector “K4”, with indicator light and Zener diode suppression circuit
3P Z5L1
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
Mating connectors for valves with connector “K4”, with rectifier
3P RZ5
For valves with connector “K4” according to EN 175301-803 and ISO 4400, 2-pole + PE, “large cubic connector” Mating connectors for valves with one or two solenoids (individual connection)Data sheet
Spare parts & repair
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