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BOSCH REXROTH
2FRM6B76-3X/6QMV
R900205527
Presure Compensated Flow Control Valves

Flow-/throttle valves: FRM 6.-3x/

$1,104.00

BOSCH REXROTH

MATERIAL:  R900205527

SUMMARY:  Flow-/throttle valves: FRM 6.-3x/

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General information

The flow control valve type 2 FRM is a 2-way flow control valve.

It is used for maintaining a constant flow, independent of pressure and temperature.

The valve basically consists of housing (1), rotary knob (2), orifice bush (3), pressure compensator (4) and an optional check valve.

 

Flow control valve type  2FRM 6 B…MV

(without external closing, without check valve)

The flow from channel A to channel B is throttled at the throttling point (5). The throttle cross-section is set by turning the rotary knob (2). To ensure a pressure-independent and constant flow in channel B, a pressure compensator (4) is fitted downstream of the throttling point (5).

The compression spring (6) presses the pressure compensator (4) downwards against its stop and keeps the pressure compensator (4) in the open position when there is no flow through the valve. When fluid flows through the valve, the pressure acting in channel A applies a force to the pressure compensator (4) via orifice (7).

The pressure compensator (4) moves into the controlled position until the forces balance. If the pressure in channel A rises, the pressure compensator (4) moves in the closing direction until the forces are balanced again. Due to this continuous compensation of the pressure compensator (4), a constant flow is obtained.

In order to control a flow through the valve in both directions, a rectifier sandwich plate type Z4S 6 may be fitted below this flow control valve.

Type 2FRM 6 B76-3X/.MV

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

01

02

03

04

05

06

07

08

09

10

2FRM

6

6

3X

/

V

*

01

2-way flow control valve

2FRM

02

Size 6

6

03

without closing of the pressure compensator

B

Adjustment type

04

Lockable rotary knob with scale

1)

3

Rotary knob with scale

7

05

Zero position of the marking at port P

6

06

Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions)

3X

Flow (A → B)

07

up to 0.2 l/min

0,2Q

up to 0.6 l/min

0,6Q

up to 1.5 l/min

1,5Q

up to 3.0 l/min

3Q

up to 6.0 l/min

6Q

up to 10 l/min

10Q

up to 16 l/min

16Q

up to 25.0 l/min

25Q

up to 32.0 l/min

32Q

08

With check valve

R

Without check valve

M

Seal material

09

FKM seals (other seals upon request)

V

Observe compatibility of seals with hydraulic fluid used.

10

Further details in the plain text

*

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

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

general

Size

6

Weight (approx.)

kg

1.3

Installation position

any

Ambient temperature range

°C

-20 … +50

hydraulic

Size

6

Maximum operating pressure 1)

Anschluss A

bar

315

Pressure differential Δp with free return flow B → A

See characteristic curves

Minimum pressure differential

bar

6 … 14

Pressure stable (qV max) to Δp = 315 bar

%

± 2

Maximum flow

l/min

0.2 0.6 1.5 3 6 10 16 25 32

Minimum flow

up to 100 bar

l/min

0.01 0.03 0.05 0.07 0.1 0.25

up to 315 bar

l/min

0.03 0.05 0.07 0.1 0.05

Hydraulic fluid

Mineral oil (HL, HLP) according to DIN 51524, other hydraulic fluids on request

Hydraulic fluid temperature range

°C

-20 … +80

Viscosity range

mm²/s

10 … 800

Maximum admissible degree of contamination of the hydraulic fluid 2)

Class 20/18/15 according to ISO 4406 (c)
1) In applications with rectifier sandwich plate up to 210 bar
2) 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.

For applications outside these parameters, please consult us!

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

Flow dependent on the scale setting (flow control A → B)

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

Δp-qV characteristic curve via check valve (B → A) orifice closed

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

pE-qV characteristic curve

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

Temperature dependency at Δp = 20 bar

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

simplified

Detailed

without check valve;

without external closing

Type 2FRM 6 B…MV

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/ technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

with check valve;

without external closing

Type 2FRM 6 B…RV

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/ technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

Subplate mounting – version “A” and “B”

Dimensions in mm

technical illustration-2FRM6B76-3X/6QMV-Flow-/throttle valves: FRM  6.-3x/

1

Adjustment type "3" (lockable rotary knob with scale)

2

Adjustment type "7" (rotary knob with scale)

3

Identical seal rings for ports A, B, P, and T

4

Space required to remove the key

5

Bore Ø3 mm at version "B" not bored (without external closing)

6

Name plate

7

Position of the marking at port P

8

Porting pattern according to DIN 24340 form A

Subplate mounting:

Valve mounting screws (separate order)

without rectifier sandwich plate

4 hexagon socket head cap screws

ISO 4762 - M5 x 30 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 7 Nm ± 10 %,

Material no. R913000316

with rectifier sandwich plate

4 hexagon socket head cap screws

ISO 4762 - M5 x 70 - 10.9-flZn-240h-L

at friction coefficient μtotal = 0.09 to 0.14,

Tightening torque MA = 7 Nm ± 10 %,

Material no. R913000325

 

Subplates (separate order)

Type G 341/01 (G1/4)

Type G 342/01 (G3/8)

Type G 502/01 (G1/2)