BOSCH REXROTH
R900423340
$343.00
- BOSCH REXROTH
- Material:R900423340
- Model:MK6G1X/V
Due to extremely high demand, please call 800-887-4183 for availability
Size 6, A → B, mechanically actuated
Industrial hydraulic valve in a high performance range. Reliable flow limitation at selected ports to setting value.
Unpacked Weight: 0.2916 kg
The valves type MK are pressure- and viscosity-dependent throttle check valves.
If the valve is passed by the flow in throttling direction, the spring (6) and the hydraulic fluid push the poppet (5) on the seat and the connection is blocked. Via lateral bores (3), the hydraulic fluid flow is directed to the throttling point (4) between the housing (2) and the adjustable sleeve (1).
In the opposite direction, the pressure acts on the front face of the poppet (5), lifts it from the seat and releases the flow. The hydraulic fluid flow is released through the valve without throttling.
In this process, simultaneous passing of a part of the hydraulic fluid via the annular gap leads to the desired effect of self-cleaning.
| Seat valve |
| Direct actuated |
| Component series 1X |
| Maximum operating pressure 315 bar |
| Size 6 … 30 |
| Maximum flow 400 l/min |
| Data Sheet | Download Data Sheet |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Spool symbol | A → B |
| Max. pressure | 315 |
| Productgroup ID | 9,10,11,12,13,14 |
| Number of ports | 2 |
| Type of actuation | with mechanical actuation |
| Size | 6 |
| Max. flow | 20 |
| Type of connection | Threaded connection |
| Connection diagram | Pipe thread G1/4 ISO 228-1 |
| Number of switching positions | 2 |
| Weight | 0.2916 |
| Seals | FKM |
| Hydraulic fluid | HL,HLP,HLPD,HVLP,HVLPD,HETG,HEES,HEPG,HFDU,HFDR |
|
01 |
02 |
03 |
04 |
05 |
06 |
07 |
|
|
MK |
G |
1X |
/ |
* |
|
01 |
Throttle check valve |
MK |
|
02 |
Size 6 |
6 |
|
Size 8 |
8 |
|
|
Size 10 |
10 |
|
|
Size 15 |
15 |
|
|
Size 20 |
20 |
|
|
Size 25 |
25 |
|
|
Size 30 |
30 |
|
|
03 |
For threaded connection |
G |
|
04 |
Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) |
1X |
|
Corrosion resistance (outside) |
||
|
05 |
None (valve housing primed) |
no code |
|
Improved corrosion protection (240 h salt spray test according to EN ISO 9227) |
J3 |
|
|
Improved corrosion protection (720 h salt spray test according to EN ISO 9227) |
J5 |
|
|
Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") |
||
|
06 |
NBR seals |
no code |
|
FKM seals |
V |
|
|
07 |
Further details in the plain text |
* |
Notice:
For valve types for use in potentially explosive areas, refer to data sheet 07011.
general
|
Size |
6 | 8 | 10 | 15 | 20 | 25 | 30 | ||
|
Weight |
kg |
0.3 | 0.4 | 0.7 | 1.1 | 1.9 | 3.2 | 4.1 | |
|
Installation position |
any | ||||||||
|
Ambient temperature |
NBR seals |
°C |
-30 … +80 | ||||||
|
FKM seals |
°C |
-20 … +80 | |||||||
hydraulic
|
Size |
6 | 8 | 10 | 15 | 20 | 25 | 30 | ||
|
Maximum operating pressure |
bar |
315 | |||||||
|
Cracking pressure |
bar |
0.5 | |||||||
|
Maximum flow |
See characteristic curves | ||||||||
|
Leakage flow 1) |
Standard |
l/min |
0.8 | 1 | 2 | 3 | 4 | 5.5 | |
|
Version "J3" and "J5" |
l/min |
1.6 | 2.5 | 3.2 | 3.5 | 7 | 7.7 | ||
|
Hydraulic fluid |
see table "Hydraulic fluid" | ||||||||
|
Hydraulic fluid temperature range |
NBR seals |
°C |
-30 … +80 | ||||||
|
FKM seals |
°C |
-20 … +80 | |||||||
|
Viscosity range |
mm²/s |
10 … 800 | |||||||
|
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 2) |
Class 20/18/15 | ||||||||
|
Load cycles |
million |
10 | 2 | ||||||
| 1) | If valve is completely closed |
| 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. |
|
Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
Data sheet |
|
|
Mineral oils |
HL, HLP |
NBR, FKM |
DIN 51524 |
90220 |
|
|
Bio-degradable 1) |
Insoluble in water |
HETG |
FKM |
ISO 15380 |
90221 |
|
HEES |
FKM |
||||
|
Soluble in water |
HEPG |
FKM |
ISO 15380 |
||
|
Flame-resistant |
Water-free |
HFDU (glycol base) |
FKM |
ISO 12922 |
90222 |
|
HFDU (ester base) 1) |
FKM |
||||
|
HFDR |
FKM |
||||
|
Containing water 1) |
HFC (Fuchs Hydrotherm 46M, Fuchs Renosafe 500, Petrofer Ultra Safe 620, Houghton Houghto Safe 620, Union Carbide HP5046) |
NBR |
ISO 12922 |
90223 |
|
|
Important information on hydraulic fluids: For more information and data on the use of other hydraulicfluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature. Flame-resistant - containing water: Maximum pressure differential 210 bar, otherwise, increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 30 … 100%. Maximum hydraulic fluid temperature 60 °C Bio-degradable and flame-resistant – containing water: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system. |
|||||
| 1) | Not recommended for corrosion-protected version "J3" and "J5" (contains zinc) |
For applications outside these parameters, please consult us!
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves via open throttle
Δp-qV characteristic curves via open throttle
Δp-qVcharacteristic curves via open check valve with closed throttle
Type MK
Dimensions in mm
|
1 |
Valve marking on key face |
|
NG |
D1 |
ØD2 |
L |
SW1 |
SW2 |
T |
|
mm |
mm |
mm |
mm |
mm |
||
| 6 | G1/4 | 34 | 65 | 22 | 32 | 12 |
| 8 | G3/8 | 38 | 65 | 24 | 36 | 12 |
| 10 | G1/2 | 48 | 80 | 30 | 46 | 14 |
| 15 | G3/4 | 58 | 100 | 41 | 55 | 16 |
| 20 | G1 | 72 | 110 | 46 | 70 | 18 |
| 25 | G1 1/4 | 87 | 130 | 55 | 85 | 20 |
| 30 | G1 1/2 | 93 | 150 | 60 | 90 | 22 |