China factory Pn16 HDPE PP Compression Fitting Male Threaded Adaptor Coupling for Water Supply brass coupling

Product Description


A HDPE compression female adaptor fitting is used to join a length of HDPE pipe with a male-threaded valve or tap. Compression female adaptor fittings can also be used to fit a male-threaded end cap, so that a pipeline extension can be fitted in future.
PP compression female adaptor fittings can be manufactured in a diameter sizing from 20*1/2″mm to 110*4″mm, with pressures up to 16 bar. The HDPE compression female adaptor fittings are made from high quality PP-B material that is resistant to etching by numerous chemical substances, and to UV rays, and are suitable for outdoor use.
SUNPLAST HDPE compression fittings / PP compression fittings are manufactured in compliance with the requirements of standards EN 712/713/715/911; ISO 3501/3503/3458/3459.The fittings can be installed on HDPE pipes which are in compliance with standards ISO 11922; DIN 8072/8074; UNE 53131. The threaded versions are manufactured in compliance with standard ISO 7; DIN 2999.
PP compression female adaptor are consisted of 5 palstic accessories:

Mark Part Name Material Color
A Cap High quality polypropylene black co-polymer (PP-B) Blue
B Clinching Ring POM resin White
C Blocking Bush High quality polypropylene black co-polymer (PP-B) Black
D “O” Ring Gasket NBR rubber Black
E Body High quality polypropylene black co-polymer (PP-B) Black

More brief details as below:

Product HDPE Compression Female Adaptor, hdpe, female adaptor, female adaptor hdpe, Compression female adaptor, HDPE pipe female adaptor, Poly female adaptor, PP compression female adaptor
Specification   20*1/2″ to 110*4″
Pressure ratings  Working Pressure at 20ºC:
20~63mm in PN16; 75~110mm in PN10
Material High quality polypropylene black co-polymer (PP-B)
Color Black body / Blue Cap
Manufacturing Standard Dimensions and characteristics:  ISO 3501/3503/3458/3459.
To be installed on HDPE pipes: ISO 11922; DIN 8072/8074;        
Threads (BSP): ISO 7; DIN 2999.
Samples available  Yes, samples are available, but charged.
Packing method  Cartons
MOQ  Negotiable
Customized Logo available
(OEM Service)
For small quantity of order, customer logo can be marked on the fittings by laser marking or sticker.
For big quantity of order, customer logo can be embossed on the fittings.
Production lead time  Mass stock available for regular sizes
About 10 days for a 20ft container, 20 days for a 40ft container
Warranty time  1 years for normal use 
Payment term  T/T, L/C, DP, Western Union, or negotiable 
FOB loading port  HangZhou/ZheJiang China 
Place of origin  HangZhou, China 

Product Specifications   
HDPE/PP compression female adaptor fittings can be manufactured sizing from 20*1/2″mm to 110*4″mm. The size 20-63mm with a pressure of PN16, and 75-110mm pressurized in PN10.   

Pressure Rating
20*1/2″ PN16 44 420
20*3/4″ PN16 45 400
20*1″ PN16 51 360
25*1/2″ PN16 64 240
25*3/4″ PN16 65 240
25*1″ PN16 76 220
32*1/2″ PN16 94 160
32*3/4″ PN16 96 160
32*1″ PN16 100 160
32*1-1/4″ PN16 110 140
40*1″ PN16 172 96
40*1-1/4″ PN16 172 90
40*1-1/2″ PN16 184 90
50*1-1/4″ PN16 279 60
50*1-1/2″ PN16 286 60
50*2″ PN16 295 52
63*1-1/4″ PN16 465 30
63*1-1/2″ PN16 484 28
63*2″ PN16 502 28
75*2″ PN10 592 24
75*2-1/2″ PN10 601 24
75*3″ PN10 657 24
90*2-1/2″ PN10 810 12
90*3″ PN10 852 12
90*4″ PN10 915 12
110*3″ PN10 1423 8
110*4″ PN10 1424 8

HDPE Compression Fittings CZPT Can Offer
As a integrated & experienced manufacturer & provider in China, CZPT carries an extensive range of HDPE compression fittings in a diameter sizing from 20mm to 110mm, and all customers can find the best solution of fittings for their pipeline systems in SUNPLAST
Our poly pipe compression fittings include:
→ HDPE Compression Coupler/Coupling,HDPE Compression Reducer Fittings, HDPE Compression Female/Male Adaptor Fittings
→ HDPE Compression 90 Degree Elbow,HDPE Compression Female/Male Elbow Fittings
→ HDPE Compression Equal Tee, HDPE Compression Reducing Tee, HDPE Compression Female/Male Tee Fittings
→ HDPE Compression Flange Adaptor
→ HDPE Compression End Cap

Benefits Of PP Compression fittings
By comparison of the other fittings, poly pipe compression fittings provide outstanding physical and performance benefits:
By comparison of the other HDPE fittings, HDPE electrofusion fittings repute more benefits:
* Fast assemble & disassemble, Simple installation:No welding, No special tools required, easily assembling & disassembling, those makes PP compression fittings more & more popularly used, especially for irrigation systems.
* lower installation costs & labor costs: HDPE compression fittings is a fittings use a mechanical connection method, fast to install & less install workers will be required.
* Perfect watertight: The unique design & NBR “O” rings ensure Poly compression fittings a perfect watertight for long time use.

* How to connect the PP compression fittings?
A: PP compression fittings are very easy to install, which involves the following steps:
• Preparing the pipe, removing the burrs and beveling the edge of pipe. The outer surface of the pipe must be free from imperfections or indentations where the body of the fittings make contact with the pipe
• Unscrewing the blue nut and put it into the pipe followed by the white clamping ring. Make sure the clamping ring is in the correct position, with the larger mouth outwards to the edge of pipe.
• Pressing the pipe axially into the poly compression fittings, until it touch the internal gap of fittings.
• Tightening the ring nuts by hand, and then use the torque wrench provided, till it is tight.
* What is the most common cause of leaking of HDPE compression fittings?
A: It is critical to avoid over-tightening the nut or else the integrity of the poly compression fitting will be compromised by the excessive force. If the nut is overtightened the ferrule will deform improperly causing the joint to fail. Indeed, overtightening is the most common cause of leaks in PP compression fittings.
* How much burst pressure can Poly compression fitting take?
A: SUNPLAST PP compression fittings are designed for the max.normal pressure 16 bars at 20ºC, and the burst pressure reaches 35 bars.
* Can CZPT HDPE compression fittings exposed under sunshine?
A: Yes, all HDPE pipe compression fittings are UV-resistant, and can be used outdoor.
* HDPE CZPT fittings & HDPE compression fittings, which 1 is better?
A: It is hard to say. HDPE compression fittings are only be possible for small diameter pipe till 110mm, while HDPE CZPT fittings are available for all sizes.
By comparison to HDPE CZPT fittings, Poly pipe compression fittings are easy install, less cost, and are especially useful in installations that may require occasional disassembly or partial removal for maintenance etc., since these joints can be broken and remade without affecting the integrity of the joint.
The disadvantage is PP compression fittings are not as robust as CZPT fittings.
Why Choose Us?
 Rich experience on manufacturing HDPE fittings over 20 years, we are an expert in this industry.
 Full product range available, you will always find the right solution here.
 Strong after-sale term supports to provide professional guide for installation.
 By using top quality raw material, with long warranty time on quality.
 Short lead time to satisfy your urgent need request.
 Quick reply for your inquiries within 12 hours.
 OEM service available to support a good sale in customers’ market.

Contact Us
If you have any requirements on PP compression fittings, or any question on our fittings, please contact us freely. CZPT has well trained staff who are available to address your needs and provide technical support to all sectors when needed.

Material: PP
Connection: Press Connection
Transport Package: Cartons
Specification: 20-110
Origin: China
US$ 2/Piece
1 Piece(Min.Order)

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What Is a Coupling?

A coupling is a device used to connect two shafts. It transmits power between them and allows for some misalignment or end movement. There are several types of couplings. The most common ones are gear couplings and planetary couplings. However, there are many others as well.

Transfer of energy

Energy coupling is a process by which two biological reactions are linked by sharing energy. The energy released during one reaction can be used to drive the second. It is a very useful mechanism that synchronizes two biological systems. All cells have two types of reactions, exergonic and endergonic, and they are connected through energy coupling.
This process is important for a number of reasons. The first is that it allows the exchange of electrons and their energy. In a single molecule, this energy transfer involves the exchange of two electrons of different energy and spin. This exchange occurs because of the overlap interaction of two MOs.
Secondly, it is possible to achieve quadratic coupling. This is a phenomenon that occurs in circular membrane resonators when the system is statically deflected. This phenomenon has been gaining a great deal of interest as a mechanism for stronger coupling. If this mechanism is employed in a physical system, energy can be transferred on a nanometer scale.
The magnetic field is another important factor that affects the exchange of energy between semiconductor QWs. A strong magnetic field controls the strength of the coupling and the energy order of the exciton. The magnetic field can also influence the direction of polariton-mediated energy transfer. This mechanism is very promising for controlling the routing of excitation in a semiconductor.


Couplings play a variety of functions, including transferring power, compensating for misalignment, and absorbing shock. These functions depend on the type of shaft being coupled. There are four basic types: angular, parallel, and symmetrical. In many cases, coupling is necessary to accommodate misalignment.
Couplings are mechanical devices that join two rotating pieces of equipment. They are used to transfer power and allow for a small degree of end-to-end misalignment. This allows them to be used in many different applications, such as the transmission from the gearbox to the differential in an automobile. In addition, couplings can be used to transfer power to spindles.


There are two main types of couplings: rigid and flexible. Rigid couplings are designed to prevent relative motion between the two shafts and are suitable for applications where precise alignment is required. However, high stresses in the case of significant misalignment can cause early failure of the coupling. Flexible couplings, on the other hand, allow for misalignment and allow for torque transmission.
A software application may exhibit different types of coupling. The first type involves the use of data. This means that one module may use data from another module for its operation. A good example of data coupling is the inheritance of an object. In a software application, one module can use another module’s data and parameters.
Another type of coupling is a rigid sleeve coupling. This type of coupling has a pipe with a bore that is finished to a specified tolerance. The pipe contains two threaded holes for transmitting torque. The sleeve is secured by a gib head key. This type of coupling may be used in applications where a couple of shafts are close together.
Other types of coupling include common and external. Common coupling occurs when two modules share global data and communication protocols. This type of coupling can lead to uncontrollable error propagation and unforeseen side effects when changes are made to the system. External coupling, on the other hand, involves two modules sharing an external device interface or communication protocol. Both types of coupling involve a shared code structure and depend on the external modules or hardware.
Mechanical couplings are essential in power transmission. They connect rotating shafts and can either be rigid or flexible, depending on the accuracy required. These couplings are used in pumps, compressors, motors, and generators to transmit power and torque. In addition to transferring power, couplings can also prevent torque overload.


Different coupling styles are ideal for different applications, and they have different characteristics that influence the coupling’s reliability during operation. These characteristics include stiffness, misalignment capability, ease of installation and maintenance, inherent balance, and speed capability. Selecting the right coupling style for a particular application is essential to minimize performance problems and maximize utility.
It is important to know the requirements for the coupling you choose before you start shopping. A proper selection process takes into account several design criteria, including torque and rpm, acoustic signals, and environmental factors. Once you’ve identified these parameters, you can select the best coupling for the job.
A gear coupling provides a mechanical connection between two rotating shafts. These couplings use gear mesh to transmit torque and power between two shafts. They’re typically used on large industrial machines, but they can also be used in smaller motion control systems. In smaller systems, a zero-backlash coupling design is ideal.
Another type of coupling is the flange coupling. These are easy to manufacture. Their design is similar to a sleeve coupling. But unlike a sleeve coupling, a flange coupling features a keyway on one side and two threaded holes on the other. These couplings are used in medium-duty industrial applications.
Besides being useful for power transmission, couplings can also prevent machine vibration. If vibration occurs in a machine, it can cause it to deviate from its predetermined position, or damage the motor. Couplings, however, help prevent this by absorbing the vibration and shock and preventing damage to expensive parts.
Couplings are heavily used in the industrial machinery and electrical industries. They provide the necessary rotation mechanism required by machinery and other equipment. Coupling suppliers can help customers find the right coupling for a specific application.

Criteria for selecting a coupling

When selecting a coupling for a specific application, there are a number of different factors to consider. These factors vary greatly, as do operating conditions, so selecting the best coupling for your system can be challenging. Some of these factors include horsepower, torque, and speed. You also need to consider the size of the shafts and the geometry of the equipment. Space restrictions and maintenance and installation requirements should also be taken into account. Other considerations can be specific to your system, such as the need for reversing.
First, determine what size coupling you need. The coupling’s size should be able to handle the torque required by the application. In addition, determine the interface connection, such as straight or tapered keyed shafts. Some couplings also feature integral flange connections.
During the specification process, be sure to specify which materials the coupling will be made of. This is important because the material will dictate most of its performance characteristics. Most couplings are made of stainless steel or aluminum, but you can also find ones made of Delrin, titanium, or other engineering-grade materials.
One of the most important factors to consider when selecting a coupling is its torque capability. If the torque rating is not adequate, the coupling can be damaged or break easily. Torque is a major factor in coupling selection, but it is often underestimated. In order to ensure maximum coupling performance, you should also take into consideration the size of the shafts and hubs.
In some cases, a coupling will need lubrication throughout its lifecycle. It may need to be lubricated every six months or even once a year. But there are couplings available that require no lubrication at all. An RBI flexible coupling by CZPT is one such example. Using a coupling of this kind can immediately cut down your total cost of ownership.
China factory Pn16 HDPE PP Compression Fitting Male Threaded Adaptor Coupling for Water Supply   brass couplingChina factory Pn16 HDPE PP Compression Fitting Male Threaded Adaptor Coupling for Water Supply   brass coupling
editor by CX 2023-04-19