BOSCH REXROTH
FK16C32-2X/
R900304361
Flow Control Throttle Valves
Throttle valves: FG,FK16 2X
BOSCH REXROTH
MATERIAL: R900304361
SUMMARY: Throttle valves: FG,FK16 2X
Quantity in stock: 0
Type FK . C1…
Type FK . K… (Cartridge valve)
The valves type FK are throttle check valves. The flow depends on the pressure differential between A and B and on the viscosity of the hydraulic fluid.
The valves mainly consist of adjustment type (1), housing (2), throttle bolt (3) and check valve (4).
The flow is throttled from A to B. The throttle cross-section (5) is adjusted by displacing the throttle bolt (3) in axial direction. For free
flow back from B to A, a check valve (4) is installed.
Type FK . C… (Screw-in cartridge valve)
In principle, the function of these valves corresponds to the function of version "K". However, they are delivered without housing (2) and thus can be screwed into the block directly.
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01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
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FK |
– |
2X |
/ |
* |
|
01 |
Throttle check valve |
FK |
|
02 |
Size 16 |
16 |
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Size 25 |
25 |
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Size 32 |
32 |
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|
03 |
Cartridge valve |
K |
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Cartridge valve |
C |
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Adjustment type |
||
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04 |
Rotary knob |
1 |
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Lockable rotary knob with scale |
3 |
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Rotary knob with scale |
7 |
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Cracking pressure |
||
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05 |
Cracking pressure 1.5 bar (standard) |
2 |
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Cracking pressure 3 bar |
3 |
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|
06 |
Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) |
2X |
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Seal material |
||
|
07 |
NBR seals |
no code |
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FKM seals |
V |
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Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) |
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|
08 |
Further details in the plain text |
* |
general
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Size |
16 | 25 | 32 | ||
|
Weight |
Cartridge valve "K" |
kg |
0.8 | 1.7 | 4 |
|
Screw-in cartridge valve "C" |
kg |
0.4 | 0.7 | 1.7 | |
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Installation position |
any | ||||
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Ambient temperature range |
NBR seals |
°C |
-30 … +80 | ||
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FKM seals |
°C |
-20 … +80 | |||
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Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
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Mineral oils and related hydrocarbons |
HL, HLP, HLPD, HVLP, HVLPD |
NBR, FKM |
DIN 51524 |
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Environmentally compatible |
Insoluble in water |
HETG |
NBR, FKM |
ISO 15380
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HEES |
FKM |
|||
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Soluble in water |
HEPG |
FKM |
ISO 15380
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|
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Containing water |
Water-free |
HFDU, HFDR |
FKM |
ISO 12922
|
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Important information on hydraulic fluids! For further information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.)! |
||||
hydraulic
|
Size |
16 | 25 | 32 | ||
|
Maximum operating pressure |
bar |
315 | |||
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Maximum flow (standard valves) |
l/min |
100 | 200 | 400 | |
|
Hydraulic fluid |
see table | ||||
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Hydraulic fluid temperature range |
NBR seals |
°C |
-30 … +80 | ||
|
FKM seals |
°C |
-20 … +80 | |||
|
Viscosity range |
mm²/s |
10 … 800 | |||
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Maximum admissible degree of contamination of the hydraulic fluid 1) |
Class 20/18/15 according to ISO 4406 (c) | ||||
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Actuating torque approx. (adjustment type) |
Nm |
5 | |||
| 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. |
For applications outside these parameters, please consult us!
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves ‒ NG16
Δp-qV characteristic curves ‒ NG25
Δp-qV characteristic curves ‒ NG32
Δp-qV characteristic curves, throttle closed via check valve
Cartridge valve “K”
Dimensions in mm
|
1 |
Adjustment type "1" |
|
2 |
Adjustment type "7" |
|
3 |
Adjustment type "3" |
|
4 |
Setting range |
|
5 |
Space required to remove the key |
|
9 |
Valve mounting screws (cartridge valve "K") |
|
NG |
ØD1 |
ØD2 |
H1 |
H2 |
H3 |
H4 |
H5 |
H6 |
▢ L1 |
▢ L2 |
SW |
|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|
| 16 | 8.4 | 13.5 | 5.2 | 12 | 62.5 | 79.5 | 10 | 2 | 65 | 48 | 30 |
| 25 | 14 | 20 | 8 | 20 | 70 | 88 | 12 | 2 | 80 | 55 | 36 |
| 32 | 18 | 26 | 10 | 26 | 75 | 93 | 14 | 2 | 105 | 70 | 55 |
Installation bore
Dimensions in mm
| 1) | Visual inspection |
|
6 |
Depth of fit |
|
7 |
Port A can be positioned around the central axis of port B. (Attention! Observe the position of the mounting bores!) |
Connection surface
Dimensions in mm
General tolerances ISO 2768-mK
|
NG |
ØD3 |
ØD4 |
ØD5 |
ØD6 |
D7 |
H7 |
H8 |
H9 |
H10 |
H11 |
H12 |
L2 |
|||
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mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
||||
| 16 | 38 | H7 | 36 | H7 | 15 | 15 | M8 | 20.5 | 34 | 44 | 47 | + 0.1 | 16 | 33 | 48 |
| 25 | 52 | H7 | 50 | H7 | 25 | 20 | M12 | 24 | 40.5 | 55 | 60.5 | + 0.1 | 19 | 39.5 | 55 |
| 32 | 72 | H7 | 70 | H7 | 35 | 30 | M16 | 35 | 58 | 75 | 80.5 | + 0.1 | 26 | 57.5 | 70 |
Screw-in cartridge valve “C”
Dimensions in mm
|
1 |
Adjustment type "1" |
|
2 |
Adjustment type "7" |
|
3 |
Adjustment type "3" |
|
4 |
Setting range |
|
5 |
Space required to remove the key |
|
10 |
Tightening torques (screw-in cartridge valve "C"): |
|
NG16MA = 170 Nm ±10 %, moisten thread with hydraulic fluid |
|
|
NG25MA = 305 Nm ±10 %, moisten thread with hydraulic fluid |
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NG32MA = 600 Nm ±10 %, moisten thread with hydraulic fluid |
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Notice!The tightening torques refer to a housing tensile strength of at least 300 N/mm2 (corresponds to GG30) |
Mounting cavity
Dimensions in mm
| 1) | Pipe thread according to ISO 228/1 |
General tolerances ISO 2768-mK
|
7 |
Port A can be positioned around the central axis of port B. (Attention! Observe the position of the mounting bores!) |
Valve mounting screws Cartridge valve "K" (separate order)
NG164 hexagon socket head cap screws
ISO 4762 - M8 x 20 - 10.9-flZn-240h-L
Friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 30 Nm ±10 %,
Material no. R901021242
NG254 hexagon socket head cap screws
ISO 4762 - M12 x 25 - 10.9-flZn-240h-L
Friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 102 Nm ±10 %,
Material no. R913000128
NG324 hexagon socket head cap screws
ISO 4762 - M16 x 35 - 10.9-flZn-240h-L
Friction coefficient μtotal = 0.09 to 0.14,
Tightening torque MA = 250 Nm ±10 %,
Material no. R913000509
Notice!
The tightening torques refer to the maximum admissible operating pressure. Friction coefficients, tightening torques, and preload forces interact with each other. For this reason, checking of the mounting characteristics with original components and boundary conditions is recommended. Tightening torques depend on the stability of the installation housing!|
NG |
H3 |
H4 |
H5 |
SW |
|
mm |
mm |
mm |
mm |
|
| 16 | 50.5 | 67.5 | 10 | 30 |
| 25 | 50 | 68 | 12 | 36 |
| 32 | 49 | 67 | 14 | 55 |
|
NG |
ØD5 |
ØD6 |
ØD8 |
ØD9 |
D10 |
H7 |
H10 |
H13 |
H14 |
H15 |
H16 |
H17 |
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|
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
mm |
|||
| 16 | 14 | 10 | 34.1 | + 0.2 | 28 | H6 | G3/4 | 33 | 48 | - 0.2 | 26 | 8.2 | + 0.1 | 2 | 22 | 1.5 |
| 25 | 25 | 20 | 51.1 | + 0.2 | 44 | H6 | G1 1/4 | 41.5 | 67.5 | - 0.2 | 27 | 9.4 | + 0.1 | 2.5 | 27 | 2 |
| 32 | 35 | 30 | 70.1 | + 0.2 | 60 | H6 | G 2 | 56 | 93.5 | - 0.2 | 29 | 8.5 | + 0.1 | 2.5 | 36 | 3 |