RK Threaded Hydraulic Quick Couplings
Application
It is applied in Hammer Circuit , High Pressure pulse applications ,Construction plant , mobile equipment , demolition and agricultural industries.
Characteristics
New valve design , it can resistance damage from high flow and the pressure of impulse that providing advanced performance.
Special flush-face valve avoid spillage during connection and disconnection.
It can connect or disconnect with residual pressure up to 10MPa from both end.
Max 420 bars operating pressure
Screw connect deisgn eliminates brinelling
Flat face design prevents fluid loss during disconnection
Allow for minimal inclusion of air and contaminents during connection
Can be connected with up to 50 bar residual pressure in the hydraulic circuit
New valve design , it can resistance damage from high flow and the pressure of impulse that providing advanced performance
Machined from solid steel barstock for durability
Compatible with Stucchi VR Series、Voswinkel RK Series
Specifications
Materials |
zn/zn-ni plated carbon steel body |
Seals |
standard in nitrile NBR. On request FKM&EPDM seals |
Back-up ring |
PTFE |
Working temp |
with standard seals -25°+125° |
HL |
ISO |
L1 |
L2 |
L3 |
D |
S1 |
S2 |
S3 |
T |
T1 |
COD(F) |
COD(M) |
03 |
10 |
110.5 |
65.5 |
58.3 |
39 |
22 |
32 |
36 |
3/8’’BSP |
M32*3 |
RK-03F-BSP |
RK-03M-BSP |
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M16*1.5 |
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M18*1.5 |
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04 |
12.5 |
122.8 |
74.5 |
67 |
54 |
24 |
46 |
41 |
1/2’’BSP |
M36*3 |
RK-04F-BSP |
RK-04M-BSP |
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M20*1.5 |
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M22*1.5 |
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06 |
20 |
137.5 |
81 |
77 |
66 |
32 |
60 |
55 |
3/4’’BSP |
M48*3 |
RK-06F-BSP |
RK-06M-BSP |
08 |
25 |
164.5 |
105 |
90 |
64 |
41 |
55 |
55 |
1’’BSP |
M54*4 |
RK-08F-BSP |
RK-08M-BSP |
Technical Data
Nominal Size |
Max.Working Pressure |
Rated flow |
Max flow rate |
Min.Burst Pressure |
Fluid Spillage |
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Male |
Female |
Coupled |
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HL |
ISO |
（bar） |
(l/m) |
(l/m) |
(bar) |
(bar) |
(bar) |
(cc) |
03 |
10 |
420 |
23 |
46 |
1300 |
1400 |
2500 |
0.02 |
04 |
12.5 |
420 |
45 |
90 |
1300 |
1000 |
1500 |
0.02 |
06 |
20 |
420 |
106 |
150 |
1100 |
1300 |
1300 |
0.06 |
08 |
25 |
350 |
189 |
240 |
1100 |
1100 |
1300 |
0.10 |
Accessories | ||||
HL |
ISO |
Female Dust Plug |
Male Dust Cap |
Material |
03 |
10 |
RK-03-SDP |
RK-03-SDC |
Plastic |
04 |
12.5 |
RK-04-SDP |
RK-04-SDC |
Plastic |
06 |
20 |
RK-06-SDP |
RK-06-SDC |
Plastic |
08 |
25 |
RK-08-SDP |
RK-08-SDC |
Plastic |
Selection and maintenance recommendations
Proper selection is crucial for maximizing product performance. Users must determine the model based on the system's maximum operating pressure, flow rate requirements (refer to rated and maximum flow rates), and interface thread standard (such as BSP). For hammer impact applications, selecting a full-size model is strongly recommended to ensure durability. To extend connector life, always use the matching dust cap and dust plug when not in use to prevent dust and foreign matter from damaging the precision sealing surfaces. Regularly inspecting the seals and selecting appropriate sealing materials based on the operating environment is best practice for maintaining long-term trouble-free system operation.
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