China Hot selling Galvanized Aluminum Storz Coupling for Fire Hose and Hydrant DN65 DN50 ac coupling

Product Description


The Storz type coupling is an important component used to connect fire hose with nozzle gun etc.

KD series is in aluminum material(commonly used with cheaper cost yet good performance), with great quality and easy to operate.

Size: DN: 50/65mm


Our Advantages

  1. Genuine manufacturer since 2003 with over 20years experience;
  2. With 3 factories of our own in China;
  3. ISO approved and TUV audited supplier with exporting license of our own.
  4. Product certifications: CNAS, CCCF, CE, MSDS etc.
  5. With our own brand LONGDU, overseas partner/distributor is highly welcome;
  6. ODM/OEM orders are accepted.



1. Are you a manufacturer or a trading company?
– Manufacturer, 100%, located in HangZhou City, HangZhou, ZheJiang Province, China.

2. Can we pay a visit to your factory?
– Sure, we warmly welcome all customers to inspect our factory.

3. What products do you manufacture?
– Wide product range of fire fighting foam system and fire sprinkler system, such as foam bladder tanks,  foam concentrates, fire hoses, sprinkler heads, hydrants, gate valves, alarm valves and so on. 

4. What is your sample policy?
– For small items, we offer FREE SAMPLES for sample evaluation purpose, but customers need to pay for the shipping; For large and heavy items, we charge for the samples, but the charge will be refunded to customer when the order quantity reaches certain amount. 

5. What is your payment method?
– T/T, L/C, Paypal, Western Union etc. 

6. What is your delivery time?
– We have READY STOCK of some products(such as sprinkler heads, hoses, hydrants etc.), which allows for quick delivery within a week,  for other items or OEM orders, the delivery time is normally within 1 month. The quicker the payment from you, the sooner the delivery time will be:)

7. Which is your loading port from China?
– HangZhou port by sea or by air, and this year we are going to launch a NEW PLANT in ZheJiang province, so some products may ship from HangZhou or HangZhou port. 

Certification: GB8013-2005, CCCF
Surface Treatment: Epoxy Painting
Material: Aluminum
Certificate: Cccf, CNAS, ISO
Packing Details: CTN: 61X32X32.5cm; 30PCS/CTN; G.W.: 18.5kgs
Feactures: Quick to Install
US$ 3/Set
1 Set(Min.Order)

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What Is a Coupling?

A coupling is a mechanical device that links two shafts together and transmits power. Its purpose is to join rotating equipment while permitting a small amount of misalignment or end movement. Couplings come in a variety of different types and are used in a variety of applications. They can be used in hydraulics, pneumatics, and many other industries.


Coupling is a term used to describe a relationship between different modules. When a module depends on another, it can have different types of coupling. Common coupling occurs when modules share certain overall constraints. When this type of coupling occurs, any changes to the common constraint will also affect the other modules. Common coupling has its advantages and disadvantages. It is difficult to maintain and provides less control over the modules than other types of coupling.
There are many types of coupling, including meshing tooth couplings, pin and bush couplings, and spline couplings. It is important to choose the right coupling type for your specific application to get maximum uptime and long-term reliability. Listed below are the differences between these coupling types.
Rigid couplings have no flexibility, and require good alignment of the shafts and support bearings. They are often used in applications where high torque is required, such as in push-pull machines. These couplings are also useful in applications where the shafts are firmly attached to one another.
Another type of coupling is the split muff coupling. This type is made of cast iron and has two threaded holes. The coupling halves are attached with bolts or studs.


The coupling function is an incredibly versatile mathematical tool that can be used in many different scientific domains. These applications range from physics and mathematics to biology, chemistry, cardio-respiratory physiology, climate science, and electrical engineering. The coupling function can also help to predict the transition from one state to another, as well as describing the functional contributions of subsystems in the system. In some cases, it can even be used to reveal the mechanisms that underlie the functionality of interactions.
The coupling selection process begins with considering the intended use of the coupling. The application parameters must be determined, as well as the operating conditions. For example, if the coupling is required to be used for power transmission, the design engineer should consider how easily the coupling can be installed and serviced. This step is vital because improper installation can result in a more severe misalignment than is specified. Additionally, the coupling must be inspected regularly to ensure that the design parameters remain consistent and that no detrimental factors develop.
Choosing the right coupling for your application is an important process, but it need not be difficult. To find the right coupling, you must consider the type of machine and environment, as well as the torque, rpm, and inertia of the system. By answering these questions, you will be able to select the best coupling for your specific application.


A coupling is a device that connects two rotating shafts to transfer torque and rotary motion. To achieve optimal performance, a coupling must be designed for the application requirements it serves. These requirements include service, environmental, and use parameters. Otherwise, it can prematurely fail, causing inconvenience and financial loss.
In order to prevent premature failure, couplings should be properly installed and maintained. A good practice is to refer to the specifications provided by the manufacturer. Moreover, it is important to perform periodic tests to evaluate the effectiveness of the coupling. The testing of couplings should be performed by qualified personnel.
China Hot selling Galvanized Aluminum Storz Coupling for Fire Hose and Hydrant DN65 DN50   ac couplingChina Hot selling Galvanized Aluminum Storz Coupling for Fire Hose and Hydrant DN65 DN50   ac coupling
editor by CX 2023-07-07