Product Description

DIN PN16 Water Supply PVC Pipe Fitting Reducing Coupling Pipe Coupling 

1, Product Description

Item Name: PVC fitting pn16
Material: PVC/UPVC
Standard: DIN
Pressure: PN16
Temperature: Normal Temperature
Color: Many colors available for choice
Packing: Carton, Polybag, Color Box or Customized
SIZE: 20-400mm
Delivery port: HangZhou by sea
Application: Water supply, Swimming pool, Agricultural field, Irrigation system, other application field


– Resistant to high temperatures, good impact strength,thicker wall, more resistant to pressure.
– Convenient and reliable installation, low construction expenses
– Low noise (reduced by 40% compared to galvanized steel pipes)
– Light colors and excellent design ensure suitability for both exposed and hidden installation


Name  Model   Size 
45 DEG ELBOW QX19 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 250mm, 280mm, 315mm, 355mm, 400mm 
REDUCING TEE  QX20 25*20mm, 32x20mm, 32x25mm, 40x20mm, 40x25mm, 40x32mm, 50x20mm, 50x25mm, 50x32mm, 50x40mm, 63x20mm, 63x25mm, 63x32mm, 63x40mm, 63x50mm, 75x32mm, 75x40mm,75x50mm, 75x63mm, 90x50mm, 90x63mm, 90x75mm, 110x50mm, 110x63mm, 110x75mm, 110x90mm, 125x75mm, 125x90mm, 125x110mm, 140x110mm, 160x90mm, 160x110mm, 160x125mm, 160x140mm, 180x160mm, 200x110mm, 200x160mm, 225x160mm, 225x200mm, 250x110mm, 250x160mm, 250x200mm, 280x250mm, 315x110mm, 315x160mm, 315x200mm, 315x250mm, 355x200mm, 355x250mm, 355x315mm, 400x200mm, 400x250mm, 400x315mm, 400x355mm 
90 DEG ELBOW QX21 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 250mm, 280mm, 315mm, 355mm, 400mm 
EQUAL TEE  QX22 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 250mm, 280mm, 315mm, 355mm, 400mm 
MALE ADAPTOR  QX23 1/2″,  3/4″,  1″,  1 1/4″,  1 1/2″,  2″,  2 1/2″,  3″,  4″ 
COUPLING QX24 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm,  200mm,  225mm,  250mm,  280mm, 315mm, 355mm, 400mm 
FEMALE ADAPTOR  QX25 1/2″,  3/4″,  1″,  1 1/4″,  1 1/2″,  2″,  2 1/2″,  3″,  4″ 
END CAP  QX26 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 140mm, 160mm, 180mm, 200mm, 225mm, 250mm, 280mm, 315mm, 355mm, 400mm 
BRACKET  QX27 20mm,  25mm,  32mm,  40mm,  50mm,  63mm 
REDUCER  QX28 25*20mm,  32x20mm,  32x25mm,  40x20mm,  40x25mm,  40x32mm,  50x20mm,  50x25mm, 50x32mm,  50x40mm,  63x25mm,  63x32mm,  63x40mm,  63x50mm,  75x32mm, 75x40mm, 75x50mm, 75x63mm, 90x40mm,  90X50mm, 90x63mm,  90x75mm,  110x50mm, 110x63mm, 110x75mm,  110x90mm,  125x90mm,  125x110mm,  140x90mm,  140x110mm,  160x90mm, 160x110mm,  160x125mm,  160x140mm,  180x160mm,  200x110mm,  200x125mm, 200x140mm,  200x160mm,  225x110mm,  225x125mm,  225x160mm,  225x200mm, 250x110mm,  250x160mm,  250x200mm,  280x250mm,  315x110mm,  315x125mm, 315x160mm,  315x200mm,  315x225mm,  315x250mm,  355x200mm,  355x250mm, 355x315mm,  400x200mm,  400x250mm,  400x315mm,  400x355mm 
NIPPLE  QX29 1/2″,  3/4″,  1″,  1 1/4″,    1 1/2″,  2″
REDUCING BUSHINE  QX30 25*20mm,  32x25mm,   40x32mm,   50x40mm,  63x50mm,75x63mm, 90x75mm, 110x90mm,  140x110mm,   160x140mm,   225x160mm
SADDLE CLAMP  QX31 63mm x1″,  75mmx1″,  90mmx1 1/2″, 110mmx3/8″, 110mmx1/2″, 110mmx3/4″, 110mmx1″, 110mmx 1 1/2″, 110mmx2″, 110mm x2 1/2″, 125mm x 1 1/2″, 125mmx2′, 125mmx 2 1/2″, 160mm x3/8″, 160mmx1/2″, 160mmx3/4″, 160mmx1″, 160mmx 1 1/2″, 160mmx2″, 160mm x 2 1/2″, 200mm x 1 1/2″, 200mmx2″, 200mmx2 1/2″, 225mmx1/2″, 225mmx3/4″, 225mmx1″, 225mmx 1 1/2″,           225mm x 2″, 225mmx 2 1/2″, 250mm x2″, 250mmx2 1/2″, 250×3″, 315mmx2″, 315mmx3″, 315mmx4″, 315 x110mm, 315x160mm, 400x200mm 
 TS FLANGE QX32 20mm,  25mm,  32mm,  40mm,  50mm,  63mm,  75mm,  90mm,  110mm,  140mm,  160mm, 180mm,  200mm,  250mm,  280mm
FLEXIBLE ACCESS COUPLING QX33 110mm, 160mm, 200mm, 225mm, 250mm 
VAN STONE FLANGE QX35 50mm, 63mm, 75mm, 90mm, 110mm, 125mm, 160mm, 200mm, 125mm, 250mm, 315mm, 355mm, 400mm 


Other Standrad Fittings:


HangZhou Xihu (West Lake) Dis.ang Huiya International Trade Co., Ltd (Set up in 2012) is a professional supply plastic valve/fitting and irrigation products company! 
We can be flexible operation, fast professional services, matching to help customers purchase building materials demand products! 
We supply detail like kinds of PVC ball valve, PVC union valve, butterfly valve, PVC fitting, PP fitting, PP saddle clamp, sprinkler, PVC layflat hose, drip pipe and so on other for irrigation use prodcuts. 
Our development philosophy is 
1, Quality first, customer supreme! 
2, Keep innovate and keep going beyond! 
3, Unique to stay ahead! 
We sincerely invite all domestic and overseas clients to come to advise and cooperation.

6, FAQ
A:  Advantage

(1) High pressure can stand: PN10, PN16, PN35, PN40; 150psi, 235psi etc, as customers’ request;

(2) Well and high quality control, within 1% leakage;

(3) Environment friendly, non-toxic, good looking and long service life;

(4) Light weight, easy to handle and transport; 

(5) Soft colors and excellent design, suitable for installation either exposed or hidden;

(6) Wonderful ability in chemical corrosion resistance;

(7) Easy and fast installation, making cost minimized;

(8) Widely used in building, irrigation, industry and swimming pool;

(9) Small order acceptable;

(10) Customer’s design and logo are welcome.

B Why choose QX?
(1) We provide OEM service and submit Various styles, latest designs to our clients;

(2) We work with big customers in Southeast Asia, Africa, Middle east, North America, South America;

(3) According to the needs of customers in different regions, we match different quality and thickness valves with various styles, so that our customers are very competitive in the market!

(4) Our high quality PVC valve can be consistent with European and American national brand valves!

(5) We have great experience on providing high quality products and most professional service to clients about 10 years more!

(6) Customers choose our products, can mix and match our PVC pipe fittings, PVC butterfly valves, PP Fittings, irrigation products to buy together, so that the customer product line is more abundant, both quality and delivery time are guaranteed.

(7)  We can flexible from China any port export ! Welcome you inquiry us!



Connection: Glue, Thread, Socket
Structure: Universal
Flexible or Rigid: Flexible
Material: PVC,UPVC, CPVC
Standard: Standard
Presssure: Pn10, Pn12.5, Pn16
US$ 5/Piece
1 Piece(Min.Order)

Request Sample



Customized Request


Types of Couplings

A coupling is a device used to join two shafts together and transmit power. Its purpose is to join rotating equipment while permitting a degree of end movement and misalignment. There are many types of couplings, and it is important to choose the right one for your application. Here are a few examples of couplings.


The mechanical coupling is an important component in power transmission systems. These couplings come in various forms and can be used in different types of applications. They can be flexible or rigid and operate in compression or shear. In some cases, they are permanently attached to the shaft, while in other cases, they are removable for service.
The simplest type of mechanical coupling is the sleeve coupling. It consists of a cylindrical sleeve with an internal diameter equal to the diameter of the shafts. The sleeve is connected to the shafts by a key that restricts their relative motion and prevents slippage. A few sleeve couplings also have threaded holes to prevent axial movement. This type of coupling is typically used for medium to light-duty torque.
Another type of mechanical coupling is a jaw coupling. It is used in motion control and general low-power transmission applications. This type of coupling does not require lubrication and is capable of accommodating angular misalignment. Unlike other types of couplings, the jaw coupling uses two hubs with intermeshing jaws. The jaw coupling’s spider is typically made of copper alloys. In addition, it is suitable for shock and vibration loads.
Mechanical couplings can be made from a variety of materials. One popular choice is rubber. The material can be natural or chloroprene. These materials are flexible and can tolerate slight misalignment.


Electrical coupling is the process in which a single electrical signal is transferred from a nerve cell to another. It occurs when electrical signals from two nerve cells interact with each other in a way similar to haptic transmission. This type of coupling can occur on its own or in combination with electrotonic coupling in gap junctions.
Electrical coupling is often associated with oscillatory behavior of neurons. The mechanism of electrical coupling is complex and is studied mathematically to understand its effect on oscillatory neuron networks. For example, electrical coupling can increase or decrease the frequency of an oscillator, depending on the state of the neuron coupled to it.
The site of coupling is usually the junction of opposing cell membranes. The cellular resistance and the coupling resistance are measured in voltage-clamp experiments. This type of coupling has a specific resistance of 100 O-cm. As a result, the coupling resistance varies with the frequency.
The authors of this study noted that electrotonic coupling depends on the ratio between the resistance of the nonjunctional membranes and the junctional membranes. The voltage attenuation technique helps reveal the differences in resistance and shunting through the intercellular medium. However, it is unclear whether electrotonic coupling is electrostatically mediated.
Electrical coupling has also been suggested to play a role in the intercellular transfer of information. There are many examples that support this theory. A message can be a distinct qualitative or quantitative signal, which results in a gradient in the cells. Although gap junctions are absent at many embryonic interaction sites, increasing evidence suggests a role in information transfer.


When it comes to choosing the right Flexible Coupling, there are several factors that you should take into account. Among these factors is the backlash that can be caused by the movement of the coupling. The reason for this problem is the fact that couplings that do not have anti-fungal properties can be easily infected by mold. The best way to avoid this is to pay attention to the moisture content of the area where you are installing the coupling. By following these guidelines, you can ensure the best possible installation.
To ensure that you are getting the most out of your flexible couplings, you must consider their characteristics and how easy they are to install, assemble, and maintain. You should also look for elements that are field-replaceable. Another important factor is the coupling’s torsional rigidity. It should also be able to handle reactionary loads caused by misalignment.
Flexible couplings come in many different types. There are diaphragm and spiral couplings. These couplings allow for axial motion, angular misalignment, and parallel offset. They have one-piece construction and are made from stainless steel or aluminum. These couplings also offer high torsional stiffness, which is beneficial for applications requiring high torques.
Flexible couplings have several advantages over their rigid counterparts. They are designed to handle misalignments of up to seven degrees and 0.025 inches. These characteristics are important in motion control applications. Flexible couplings are also inexpensive, and they do not require maintenance.


A beam coupling is a type of mechanical coupling, usually one solid piece, that connects two mechanical parts. Its performance is largely determined by the material used. Typical materials include stainless steel, aluminum, Delrin, and titanium. The beam coupling is rated for different speeds and torques. The coupling should be selected according to the application. In addition to the material, the application should also consider the speed and torque of the system.
There are two main types of beam couplings. The first is the helical beam coupling, which has a continuous multi spiral cut. This type of coupling offers a high degree of flexibility and compensates for a high degree of misalignment. The second type of beam coupling is the helical shaft coupling, which has a low torsional stiffness, which makes it ideal for small torque applications.
Another type of beam coupling is the multiple beam design, which combines two beams. It allows for more tolerance in manufacturing and installation and protects expensive components from excessive bearing loads. It also helps keep beams shorter than a single beam coupling. This type of coupling also enables a higher torque capacity and torsional stiffness.
Beam couplings can be manufactured with different materials, including stainless steel and aluminum. The “A” series is available in aluminum and stainless steel and is ideal for general-purpose and light-duty applications. It is also economical and durable. This type of coupling can also be used with low torque pumps or encoder/resolver systems.

Pin & bush

The Pin & bush coupling is a versatile, general-purpose coupling with high tensile bolts and rubber bushes. It can tolerate a wide range of operating temperatures and is suitable for use in oil and water-resistance applications. Its unique design enables it to be used in either direction. In addition, it requires no lubrication.
The pin bush coupling is a fail-safe coupling with a long service life and is used for high-torque applications. It provides torsional flexibility and dampens shocks, making it a flexible coupling that protects equipment and reduces maintenance costs. Its hubs are forged from graded cast iron for strength and durability. Besides, the coupling’s elastomer elements reduce vibration and impact loads. It also accommodates a misalignment of up to 0.5 degrees.
Pin & bush couplings are a popular choice for a variety of different applications. This coupling features a protective flange design that protects the coupling flange from wear and tear. The coupling nut is secured to one flange, while a rubber or leather bush sits between the other flange. Its unique design makes it ideal for use in applications where misalignment is a small factor. The rubber bushing also helps absorb vibration and shock.

Mesh tooth

Mesh tooth couplings are used to transfer torque between two shafts and reduce backlash. However, mesh tooth couplings have some limitations. One disadvantage is the break-away friction factor in the axial direction. This problem is caused by the high contact force between the tooth and gear mesh. This can cause unpredictable forces on the shafts.
In this paper, we present a FEM model for mesh tooth coupling. We first validate the mesh density. To do so, we compute the bolt stress as a uniaxial tensile during the tightening process. We used different mesh sizes and mesh density to validate our results.
The mesh stiffness of gear pairs is influenced by lead crown relief and misalignment. For example, if one tooth is positioned too far in the axis, the mesh stiffness will be decreased. A misaligned gear pair will lose torque capacity. A mesh tooth coupling can be lubricated with oil.
An ideal mesh tooth coupling has no gaps between the teeth, which reduces the risk of uneven wear. The coupling’s quality exposed fasteners include SAE Grade 5 bolts. It also offers corrosion resistance. The couplings are compatible with industrial environments. They also eliminate the need for selective assembly in sleeve couplings.
China manufacturer DIN Pn16 Water Supply PVC Pipe Fitting Reducing Coupling Pipe Coupling   coupling baseChina manufacturer DIN Pn16 Water Supply PVC Pipe Fitting Reducing Coupling Pipe Coupling   coupling base
editor by CX 2023-06-02