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BOSCH REXROTH
R901184161


$1,025.00 USD
  • BOSCH REXROTH
  • Material:R901184161
  • Model:DA6VP2A5X/350FSV

Due to extremely high demand, please call 920-337-0234 for availability

***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 DA6VP2A5X/350FSV (R901184161) is a sophisticated pressure control valve designed for hydraulic systems requiring precise control over pressure changes and flow direction. This pilot-operated pressure cutoff valve features an adjustable switching pressure differential, enabling it to seamlessly switch pump flow between different paths depending on the system's pressure conditions. The valve is composed of a pilot control stage, main stage of the screw-in cartridge valve, check valve, and housing, ensuring robust performance and reliability. In operation, the DA6VP2A5X/350FSV directs pump flow from port P to the accumulator through port B. When the pressure at port B surpasses a predetermined top switching pressure, the pilot control valve activates to enable pilot fluid discharge via port A Y. Concurrently, the check valve closes off the connection from port B to port P, diverting pump flow into a depressurized circulation from P to T. This model is particularly designed for subplate mounting with a porting pattern according to ISO standards (not fully compliant), and it can be ordered as a cartridge valve. The adjustment type includes a sleeve with hexagon and protective cap for easy manipulation of settings. The DA6VP2A5X/350FSV offers adjustable switching pressure differentials ranging from 10% to 100% of nominal value and boasts impressive maximum operating pressures and flow rates. The unit's size and component series X reflect its capability to handle maximum operating pressures up to bar levels while accommodating maximum flows in l/min. It is important to note that this model provides an indirect pressure limiting function via the check valve and control line in the actuator channel rather than direct limitation. The factory setting ensures that valves are set at nominal pressures with an approximate switching pressure differential range, which can be adjusted according to user requirements using the adjustment spindle secured by a clamping screw and lock nut for safety and consistency in operation.

The pressure valve type DA 6 V is a pilot-operated pressure cut-off valve with steplessly adjustable switching pressure differential. It basically consists of pilot control stage and main stage of the screw-in cartridge valve (1), check valve (2) and housing (3).

The pump flow in P is introduced into the accumulator of the system via port B. If the pressure at the actuator in port B exceeds the set top switching pressure, the pilot control valve opens and pilot fluid discharge is enabled via port A (Y). The check valve (2) closes the connection from port B to port P and the pump flow is switched to depressurized circulation (from P to T).

Type DA 6 VP

Switching of the pump flow from P to B (pump → actuator) to P to T (pump → tank).

The pump delivers via the check valve (2) into the hydraulic system (P to B). The pressure in channel B acts via the control line (4) and the bore (5) on the pilot control of the screw-in cartridge valve (1). Simultaneously, the pressure in channel P is applied via the bore (7) to the spring-loaded side of the main spool (8). As soon as the top cut-off pressure set via the adjustment spindle (6) in the screw-in cartridge valve (1) is reached in the hydraulic system (channel B), pilot control of the screw-in cartridge valve (1) opens the connection from the spring-loaded side of the main spool (8) to the control line (9) and the external connection via port A (Y) into the tank. Due to the bore (7), a pressure drop occurs at the main spool (8). The main spool (8) is lifted from the seat and opens connection P to T. The check valve (2) closes the connection B to P and pilot control of the screw-in cartridge valve (1) is held in open position by the actuator pressure in B.

Switching of the pump flow from P to T (pump → tank) to P to B (pump → actuator).

If the actuator pressure in B compared to the cut-off pressure has fallen according to the lower bottom pressure value set at the adjustment spindle (10), pilot control of the screw-in cartridge valve (1) is set back to its initial position.

This way, a pressure is built up on the spring-loaded side of the main spool (8). It closes the connection from P to T by means of the spring (11) and the pump delivers via the check valve (2) into the hydraulic system from P to B.

Type DA 6 VA

At this valve type, the pump connection is not designed in P but in A. The valve directs the pump flow from A to P or from A to T. The drain port is located in B (Y).

The switching processes correspond to version "VP" (this valve version supports connection with manifolds).

Type DA 6 VP…

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

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 (2) and the control line (4) in the actuator channel.

Setting the switching pressure differential:

At 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 (6) is set to the minimum adjustable top switching pressure, i.e., the adjustment spindle (6) is screwed out up to the limit stop.

By screwing in the adjustment spindle (6), the top switching pressure may be increased.

By screwing in the adjustment spindle (10), the bottom switching pressure is increased and the switching pressure differential reduced. Screwing out the adjustment spindle (10) reduced the bottom switching pressure and the switching pressure differential is increased.

The pressure adjustment is secured via a clamping screw (12) and a lock nut (13).

01

02

03

04

05

06

07

08

09

10

11

12

DA

6

V

2

5X

/

FS

*

01

Pressure cut-off valve

DA

02

Size 6

6

03

pilot operated

V

04

Pump connection in channel P (standard)

P

Pump connection in channel A

A

Adjustment type

05

Sleeve with hexagon and protective cap

2

06

Adjustment on side A

A

Adjustment on side B

B

07

Component series 50 … 59 (50 … 59: unchanged installation and connection dimensions)

5X

Pressure range

08

25 to 50 bar

50

50 to 100 bar

100

100 to 200 bar

200

150 to 350 bar

350

09

freely adjustable switching pressure differential

FS

Seal material

10

NBR seals

M

FKM seals (other seals upon request)

V

Observe compatibility of seals with hydraulic fluid used.

11

Without locating hole

no code

With locating hole

/60 1)

With locating hole and locking pin ISO 8752-3x8-St

/62

12

Further details in the plain text

*

1) Locking pin ISO 8752-3 x 8-St, material no. R900005694 (separate order)

Preferred types and standard units are specified in the EPS (standard price list).

general

Size

6

Weight

kg

2.2

Installation position

any

Ambient temperature range

NBR seals

°C

-30 … +80

FKM seals

°C

-20 … +80

hydraulic

Size

6

Type

Type "DA 6 VP" Type "DA 6 VA"

Maximum operating pressure

Port "A" (Y) (leakage pilot control) 1)

bar

100
- 		-
-

Port "B" (actuator) 2)

bar

350
- 		-
-

Port "P" (pump)

bar

350
- 		-
-

Port "T" (tank)

bar

200
- 		-
-

Port "A" (pump)

bar

- 350

Port "B" (Y) (leakage pilot control)

bar

- 100

Port "P" (actuator)

bar

- 350 3)

Port "T" (tank)

bar

- 200

Set pressure range

Pressure rating 50 bar

bar

25 … 50

Pressure rating 100 bar

bar

50 … 100

Pressure rating 200 bar

bar

100 … 200

Pressure rating 350 bar

bar

150 … 350

Switching pressure differential

adjustable from 10 % to 50 % of the nominal value

Maximum flow

l/min

40

Hydraulic fluid

see table

Hydraulic fluid temperature range

FKM seals

°C

-30 … +80

FKM seals

°C

-20 … +80

Viscosity range

Maximum

mm²/s

10 … 800

Recommended

mm²/s

20 … 60

Maximum admissible degree of contamination of the hydraulic fluid 4)

Class 20/18/15 according to ISO 4406 (c)
1) Attention! The applied pressure adds to the set pressure! The switching pressure differential remains unchanged within the setting range!
2) (after switching P to T)
3) (after switching A to T)
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

Mineral oil

HL, HLP

FKM, NBR

DIN 51524

Bio-degradable

Insoluble in water

HEES (synthetic esters)

FKM

VDMA 24568

HETG (rape seed oil)

FKM, NBR

Soluble in water

HEPG (polyglycols)

FKM

VDMA 24568

Other hydraulic fluids on request

For applications outside these parameters, please consult us!

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

Version "VP2A"

Δp-qV characteristic curves, circulation pressure – version "VP" (P to T)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version "VP2B"

Δp-qV characteristic curves, circulation pressure – version "VP" (P to T)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version "VA2A"

Δp-qV characteristic curves, circulation pressure – version "VA" (A to T)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version "VA2B"

Δp-qV characteristic curves, circulation pressure – version "VA" (A to T)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Notice!

The characteristic curves were measured with external, depressurized pilot oil return (circulation pressure). The characteristic curves apply for outlet pressure = 0 bar in the entire flow range!

Version "VP2A"

Δp-qV characteristic curves via check valve – version "VP" (P to B)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version "VP2B"

Δp-qV characteristic curves via check valve – version "VP" (P to B)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version "VA2A"

Δp-qV characteristic curves via check valve – version "VA" (A to T)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version "VA2B"

Δp-qV characteristic curves via check valve – version "VA" (A to T)

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Notice!

The characteristic curves were measured with external, depressurized pilot oil return (circulation pressure). The characteristic curves apply for outlet pressure = 0 bar in the entire flow range!

Version "VP"

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Version “VA”

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Hydraulic system with pressure accumulator

Type DA 6 VP…

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

Hydraulic system with high- and low-pressure pump

Type DA 6 VP…

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

1

to actuator

2

High-pressure pump

3

Low-pressure pump

Application note:

Establish a short and low-resistance connection between pressure cut-off valve and hydraulic accumulator.

Attention!

Accumulators may only be operated with suitable accumulator safety equipment! A pressure limiting function of the pump pressure (to the tank) is not directly provided but only indirectly via the check valve and the control line in the actuator channel (see functional description).

Version "2A"

Dimensions in mm

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

1

Adjustment type "2"

2

Identical seal rings for connection A, B, P, T

3

Name plate

4

Porting pattern according to ISO 5781-03-04-0-00 (with locating hole for locking pin ISO 8752-3 x 8-St, material no. R900005694, separate order); not in compliance with the standard, also without locating hole

Subplates (separate order)

Without locating hole

G 341/01 (G1/4)

G 342/01 (G3/8)

G 502/01 (G1/2)

with locating hole

G 341/60 (G1/4)

G 342/60 (G3/8)

G 502/60 (G1/2)

 

 

Valve mounting screws (separate order)

4 x ISO 4762 - M5 x 60 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 7 Nm ± 10 %,

material no. R913000319

Version "2B"

Dimensions in mm

technical illustration-R901184161-For subplate mounting Porting pattern according to ISO 5781-03-04-0-00 (not in compliance with the standard, also without locating hole) Subplates (separate order) As cartridge valve Adjustment type: Sleeve with hexagon and protective cap 4 pressure ratings Switching pressure differential adjustable (10 % to 50 % of the nominal value)

1

Adjustment type "2"

2

Identical seal rings for connection A, B, P, T

3

Name plate

4

Porting pattern according to ISO 5781-03-04-0-00 (with locating hole for locking pin ISO 8752-3 x 8-St, material no. R900005694, separate order); not in compliance with the standard, also without locating hole

Notice: Switching pressure differential factory settings

At the factory, the valves are set at nominal pressure to a switching pressure differential of approx. 10 % to 12 % and are supplied in a depressurized state (adjustment spindle (6) screwed out up to the at limit stop, see product description). Adjustment is realized at nominal pressure, a pump flow of approx. 10 l/min and an actuator flow of approx. 2 l/min. Different system conditions (particularly high pump and actuator flows) may lead to higher switching pressures. Here, the valve offers the possibility of optional adjustment of the switching pressure differential to the system.