KZD Poppet Valve Hydraulic Quick Couplings
Reliable Hydraulic Connections for Medium Pressure Applications
KZD series hydraulic quick couplings are engineered for fast and secure connection of hydraulic hoses, pipes, and equipment. Featuring a poppet valve design, these couplings provide reliable sealing performance, reduced fluid leakage, and stable operation in demanding hydraulic environments.
The KZD hydraulic quick disconnect couplings are manufactured according to ISO 7241 standards and are suitable for construction machinery, agricultural equipment, industrial hydraulic systems, and mobile hydraulic applications.
Features
Hydraulic systems often require frequent connection and disconnection of hoses during equipment installation, maintenance, or attachment replacement. The KZD series provides a practical solution by allowing operators to connect hydraulic lines quickly without complex tools.
The poppet valve structure automatically closes when disconnected, helping minimize fluid loss and protect hydraulic systems from external contamination.
Compared with standard hydraulic connectors, KZD couplings offer:
✅Fast push-to-connect operation
✅Secure locking mechanism
✅Reliable sealing under working pressure
✅Compatibility with international coupling standards
✅Long service life in industrial environments
Material |
Brass |
|
Optional seals |
EPDM |
FKM |
Temperature Range |
-40°C+150°C |
-25°C+200°C |
Valve Design |
Poppet Valve |
|
Connection |
Push |
|
Standard |
ISO7241-1B |
|
Interchange |
Parker 60 DNP PBV Faster HNV Holmbury IB Dixon H Stucchi IRB Eaton HK Aeroquip FD45 Snap Tite 72 Voswinkel IB Safeway S10 Tomco THK Hansen HK TEMA IB |
|
Specifications
 |
 |
Series |
DN |
ISO size |
Working Pressure |
Working Pressure |
Bursting Pressure |
Spillage |
|||
inch |
iso 4397 |
l/min |
US GPM |
Mpa |
Male |
Female |
Coupled |
ml |
|
KZD-01 |
1/8" |
3 |
4,5 |
1.2 |
7 |
25 |
25 |
24 |
0.5 |
KZD-02 |
1/4" |
6,3 |
12 |
3.2 |
7 |
23 |
23 |
22 |
1 |
KZD-03 |
3/8" |
10 |
23 |
9.1 |
7 |
23 |
23 |
22 |
2.4 |
KZD-04 |
1/2" |
12,5 |
45 |
17.8 |
7 |
23 |
23 |
22 |
3.9 |
KZD-06 |
3/4" |
20 |
106 |
42.0 |
7 |
23 |
23 |
22 |
9 |
KZD-08 |
1" |
25 |
189 |
74.9 |
7 |
21 |
21 |
20 |
19 |
KZD-10 |
1-1/4'' |
31 |
288 |
114.1 |
5.5 |
18 |
18 |
17 |
27.0 |
KZD-12 |
1-1/2'' |
38 |
379 |
200.2 |
5.5 |
18 |
18 |
17 |
95 |
KZD-16 |
2" |
51 |
757 |
299.8 |
5.5 |
18 |
18 |
17 |
170 |
ISO |
PART NO. |
LS |
D |
HEX1 |
A |
T |
5 |
KZD-01SF |
48 |
24 |
14 |
8 |
BSP1/8 |
6.3 |
KZD-02SF |
58 |
28 |
19 |
12.5 |
BSPT1/4 |
10 |
KZD-03SF |
65 |
35 |
22 |
13 |
BSPT3/8 |
12.5 |
KZD-04SF |
72.5 |
45 |
29 |
14 |
BSPT1/2 |
20 |
KZD-06SF |
88 |
54 |
36 |
17 |
BSPT3/4 |
25 |
KZD-08SF |
102 |
64.5 |
41 |
23 |
BSPT1 |
31.5 |
KZD-10SF |
115 |
69 |
54 |
27 |
BSPT1-1/4 |
40 |
KZD-12SF |
124 |
79 |
60 |
27 |
BSPT1-1/2 |
50 |
KZD-16SF |
132 |
102 |
77 |
30 |
BSPT2 |
ISO |
PART NO. |
LP |
d |
C |
HEX2 |
A |
T |
5 |
KZD-01PF |
29 |
10.8 |
19 |
14 |
8 |
BSP1/8 |
6.3 |
KZD-02PF |
36 |
14.2 |
22.5 |
17 |
12.5 |
BSPT1/4 |
10 |
KZD-03PF |
40 |
19 |
25 |
22 |
13 |
BSPT3/8 |
12.5 |
KZD-04PF |
44 |
23.5 |
28 |
27 |
14 |
BSPT1/2 |
20 |
KZD-06PF |
52 |
31.4 |
36 |
36 |
17 |
BSPT3/4 |
25 |
KZD-08PF |
62 |
37.8 |
40 |
41 |
23 |
BSPT1 |
31.5 |
KZD-10PF |
70 |
45 |
45 |
52 |
27 |
BSPT1-1/4 |
40 |
KZD-12PF |
75 |
50 |
49 |
60 |
27 |
BSPT1-1/2 |
50 |
KZD-16PF |
80 |
70 |
52 |
77 |
30 |
BSPT2 |
Key Features of KZD Hydraulic Quick Couplings
1.Poppet Valve Design for Stable Sealing
The poppet valve structure provides a dependable shut-off function when the coupling is disconnected. This design helps reduce oil leakage and maintains system cleanliness during maintenance operations.
It is commonly selected for hydraulic applications where durability and reliable fluid control are required.
2. ISO Standard Interchangeability
KZD series hydraulic quick couplings are manufactured according to ISO 7241 requirements, allowing easy replacement with many international brands.
Compatible interchange references include:
✅Parker hydraulic couplings
✅Faster hydraulic couplings
✅Stucchi hydraulic couplings
✅Eaton hydraulic couplings
✅Aeroquip hydraulic couplings
✅Holmbury hydraulic couplings
This makes KZD a practical replacement option for equipment manufacturers, distributors, and maintenance companies.
3. Durable Material and Surface Treatment
To improve corrosion resistance and working reliability, KZD couplings are available with different material and surface finishing options.
Available options:
✅Carbon steel body
✅Zinc plating
✅Chrome III plating
✅Zinc-Nickel coating
Different sealing materials are available according to temperature and fluid requirements:
✅NBR
✅EPDM
✅FKM
OEM & Customization
Applications
KZD poppet valve hydraulic couplings are widely used in:
Construction Equipment
Suitable for excavators, loaders, skid steer attachments, and other hydraulic machinery requiring frequent hose connection.
Agricultural Machinery
Used in tractors, harvesters, and agricultural implements where quick attachment replacement is needed.
Industrial Hydraulic Systems
Applied in hydraulic power units, production equipment, and fluid transfer systems.
Mobile Hydraulic Equipment
Ideal for vehicles and machines requiring reliable hydraulic hose connections.
Different sealing materials are available according to temperature and fluid requirements:
Technical Advantages
| Feature | Benefit |
| Poppet valve structure | Reduces leakage after disconnection |
| Push connection design | Faster installation and maintenance |
| ISO standard design | Easier replacement and compatibility |
| Multiple sealing options | Suitable for different operating conditions |
| Robust metal construction | Improved durability in harsh environments |
Why Choose HL FLUID KZD Hydraulic Couplings?
Choosing the right hydraulic coupling affects equipment efficiency, maintenance cost, and system reliability.
HL FLUID focuses on hydraulic connection solutions with:
Professional hydraulic coupling manufacturing experience
✅Strict dimensional inspection
✅Flexible OEM customization
✅Multiple surface treatment options
✅Support for bulk orders and distributor cooperation
Whether you need replacement hydraulic couplings or customized hydraulic quick disconnect fittings, KZD series provides a dependable connection solution for industrial applications.
FAQ
A poppet valve hydraulic coupling uses an internal valve mechanism that automatically opens when connected and closes when disconnected, helping prevent fluid leakage and contamination.
Yes. KZD series follows ISO standard dimensions and can replace many commonly used hydraulic coupling series from international brands.
They are commonly used in construction machinery, agriculture equipment, industrial hydraulic systems, and mobile equipment.
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