Product Description

A HDPE compression reducer fitting is used to join 2 lengths of different-size metric HDPE pipe.
With a size range from 25/20 mm to 110/90 mm, PP compression reducer fittings are suitable for water and other similar fluids, with pressures up to 16 bar. Poly pipe Reducer compression 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 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 reducer 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 Reducer, PP Compression reducer, Compression reducer, poly compression reducer, HDPE pipe compression reducer, Compression Reducer fittings, Poly pipe compression reducer, PP compression reducer
Specification  25*20mm to 110*90mm
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 reducer fittings can be manufactured sizing from 25×20mm to 110×90mm. The size 20-63mm with a pressure of PN16, and 75-110mm pressurized in PN10.   


Pressure Rating
20*25 PN16 98 180
32*20 PN16 126 120
32*25 PN16 141 112
40*25 PN16 219 65
40*32 PN16 242 64
50*20 PN16 348 48
50*25 PN16 348 48
50*32 PN16 372 48
50*40 PN16 414 36
63*25 PN16 554 30
63*32 PN16 562 30
63*40 PN16 627 25
63*50 PN16 711 24
75*50 PN10 679 16
75*63 PN10 761 14
90*32 PN10 787 9
90*50 PN10 875 9
90*63 PN10 957 9
90*75 PN10 1173 9
110*32 PN10 1339 5
110*50 PN10 1420 5
110*63 PN10 1508 5
110*75 PN10 1724 4
110*90 PN10 1874 4


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)

Request Sample



Customized Request


Types of Couplings

A coupling is a device that connects two shafts and transmits power from one to the other. Its main purpose is to join two pieces of rotating equipment. It also allows for some degree of misalignment or end movement. Here are a few examples of coupling types: Beam coupling, Flexible coupling, Magnetic coupling, and Shaft coupling.

Beam coupling

Beam couplings are used to couple motors and other devices. They are available in several types, including flexible, slit, and rigid beam couplings. Each has unique properties and characteristics. These couplings are best for applications requiring a high level of precision and long life. They are also a practical solution for the connection of stepping and servo motors with screw rods.
Beam couplings are usually made of stainless steel or aluminum alloy, and feature spiral and parallel cut designs. Multiple cuts allow the coupling to accommodate multiple beams and improve angular and parallel misalignment tolerances. Additionally, beam couplings are comparatively cheaper than other types of rotary joints, and they require minimal maintenance.
The materials of a beam coupling should be considered early in the specification process. They are typically made of aluminum or stainless steel, but they can also be manufactured from Delrin, titanium, and other engineering grade materials. Beam couplings are often available in multiple sizes to fit specific shaft diameters.
Beam couplings are a key component of motion control systems. They provide excellent characteristics when used properly, and they are a popular choice for many applications. A thorough understanding of each type of coupling will help to prevent coupling failure and enhance system performance. Therefore, it is important to choose the right coupling for your application.
Various types of beam couplings have unique advantages and disadvantages. The FCR/FSR design has two sets of three beams. It is available in both metric and inch shaft sizes. The FCR/FSR couplings are ideal for light-duty power transmission applications. A metric shaft is more suitable for these applications, while an inch shaft is preferred for heavier duty applications.
Two types of beam couplings are available from Ruland. The Ruland Flexible beam coupling has a multi-helical cut design that offers a greater flexibility than commodity beam couplings. This design allows for higher torque capabilities while minimizing wind-up. In addition, it is also more durable than its commodity counterparts.

Flexible coupling

A flexible coupling is a versatile mechanical connection that allows for the easy coupling of two moving parts. The design of these couplings allows for a variety of stiffness levels and can address a variety of problems, such as torsional vibrations or critical speed. However, there are a number of tradeoffs associated with flexible couplings.
One of the biggest issues is the installation of the coupling, which requires stretching. This problem can be exacerbated by cold temperatures. In such a case, it is vital to install the coupling properly. Using a gear clamp is one of the most important steps in a successful installation. A gear clamp will keep the coupling in place and prevent it from leaking.
Another common type of flexible coupling is the gear coupling. These couplings are composed of two hubs with crowned external gear teeth that mesh with two internally splined flanged sleeves. The massive size of the teeth makes them resemble gears. Gear couplings offer good torque characteristics but require periodic lubrication. These couplings can also be expensive and have a limited number of applications.
Another type of flexible coupling is the SDP/SI helical coupling. These couplings can accommodate axial motion, angular misalignment, and parallel offset. This design incorporates a spiral pattern that makes them flexible. These couplings are available in stainless steel and aluminum.
A flexible coupling has a wide range of applications. Generally, it is used to connect two rotating pieces of equipment. Depending on its design, it can be used to join two pieces of machinery that move in different directions. This type of coupling is a type of elastomeric coupling, which has elastic properties.
There are many types of flexible couplings available for different types of applications. The purpose of a flexible coupling is to transmit rotational power from one shaft to another. It is also useful for transmitting torque. However, it is important to note that not all flexible couplings are created equally. Make sure to use a reputable brand for your coupling needs. It will ensure a reliable connection.
The simplest and most commonly used type of flexible coupling is the grid coupling. This type of coupling uses two hubs with slotted surfaces. The steel grid is allowed to slide along these slots, which gives it the ability to flex. The only limitation of this type of coupling is that it can only tolerate a 1/3 degree misalignment. It can transmit torques up to 3,656 Nm.

Magnetic coupling

Magnetic coupling is a technique used to transfer torque from one shaft to another using a magnetic field. It is the most common type of coupling used in machinery. It is highly effective when transferring torque from a rotating motor to a rotating shaft. Magnetic couplings can handle high torques and high speeds.
Magnetic coupling is described by the energy difference between a high-spin state and a broken symmetry state, with the former being the energy of a true singlet state. In single-determinant theories, this energy difference is called the Kij. Usually, the broken-symmetry state is a state with two interacting local high-spin centers.
The magnetic coupling device is regarded as a qualitative leap in the reaction still industry. It has solved a number of problems that had plagued the industry, including flammability, explosiveness, and leakage. Magnetic couplings are a great solution for many applications. The chemical and pharmaceutical industries use them for various processes, including reaction stills.
Magnetic couplings are a good choice for harsh environments and for tight spaces. Their enclosed design keeps them fluid and dust-proof. They are also corrosion-resistant. In addition, magnetic couplings are more affordable than mechanical couplings, especially in areas where access is restricted. They are also popular for testing and temporary installations.
Another use for magnetic coupling is in touch screens. While touch screens use capacitive and resistive elements, magnetic coupling has found a cool new application in wireless charging. While the finger tracking on touch screens may seem like a boley job, the process is very sensitive. The devices that use wireless charging need to have very large coils that are locked into resonant magnetic coupling.
Magnetic couplings also help reduce hydraulic horsepower. They cushion starts and reduce alignment problems. They can also improve flow in oversized pumps. A magnetic coupling with an 8 percent air gap can reduce hydraulic HP by approximately 27 percent. In addition, they can be used in aggressive environments. They also help reduce repair costs.
Magnetic couplings are a great choice for pumps and propeller systems because they have the added advantage of being watertight and preventing shaft failure. These systems also have the benefit of not requiring rotating seals.

Shaft coupling

A shaft coupling joins two shafts and transmits rotational motion. Generally, shaft couplings allow for some degree of misalignment, but there are also torque limiters. Selecting the right coupling can save you time and money and prevent equipment downtime. Here are the main features to consider when purchasing a coupling for your application.
Shaft couplings should be easy to install and disassemble, transmit full power to the mated shaft, and reduce shock loads. A shaft coupling that does not have projecting parts should be used for machines that move or rotate at high speeds. Some types of shaft couplings are flexible while others are rigid.
Shaft couplings can be used in a variety of applications, including piping systems. They can be used to connect shafts that are misaligned and help maintain alignment. They can also be used for vibration dampening. Shaft couplings also allow shafts to be disconnected when necessary.
Shaft couplings can accommodate a certain amount of backlash, but this backlash must be well within the tolerance set by the system. Extremely high backlash can break the coupling and cause excessive wear and stress. In addition, excessive backlash can lead to erratic alignment readings. To avoid these issues, operators must reduce backlash to less than 2deg.
Shaft couplings are often referred to by different names. Some are referred to as “sliced” couplings while others are known as “slit” couplings. Both types offer high torque and torsional stiffness. These couplings are typically made from metals with various alloys, such as acetal, stainless steel, or titanium.
CZPT Pulley produces shaft couplings for a variety of applications. These products are used in high-power transmission systems. They have several advantages over friction couplings. In addition to minimizing wear, they don’t require lubrication. They are also capable of transmitting high torque and high speeds.
Another type of shaft coupling is the universal coupling. It is used to transmit power to multiple machines with different spindles. Its keyed receiving side and flanges allow it to transmit power from one machine to another.
China Professional Factory Price PP Compression Water Supply and Irrigation Pipe Fittings Plastic Elbow PP Reducing Coupling   coupling and cohesionChina Professional Factory Price PP Compression Water Supply and Irrigation Pipe Fittings Plastic Elbow PP Reducing Coupling   coupling and cohesion
editor by CX 2023-05-25