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Made in China Ductile Iron Grooved Pipe reducing coupling

medium:Oil Water Gas
material:Ductile Iron
Surface Treatment:Spray or DIP Paint and Other Corrosion Resistant 
Technology:Casting, Forging
Certification:FM UL ISO9001
Material of Rubber Ring:EPDM/NBR
  • S15-60.3

  • Tontr

  • S15-60.3

  • reducing coupling

  • Groove connection

  • 1-24

  • Qingdao, China

  • 1.6MPa, 2.5MPa, 4MPa, 10MPa

  • 60000 tons/year

  • Regular is red/customizable

  • EPDM/Nitrile etc.


Product Name: Made in China Ductile Iron Grooved Pipe reducing coupling

Products description:

1.Product Name:  Reducing coupling for connecting fire protection pipe

2.Material: Ductile iron

3.Dimension : 50*32mm(2*1¼) - 200*150mm (8*6 inch) or as your request

4.Surface Treatment : finish : epoxy , painted and galvanized

color : red , orange , blue or according to your requirements

5.Advange : Easy to assemble and disassembel, easy to operate


1) Automatic sprinkler system for fire protection on commercial, civil and municipal constructions like water supplying, gas supplying, heat supplying, etc

2) Industrial pipeline system on shipping, mine, oil field, textile,powder plant, etc.

3) Pipeline system on subway station, railway station, airport, seaport, bridge, etc.

7. We can produce all kinds of ductile cast iron pipe fittings  ISO9001 certification. PLS feel free to contact us for more information at any time.

All customers are welcome to visit our company.

Coupling installation instructions

This coupling is more space efficient than traditional flanged connections. With only two bolts and nuts, installation is faster and manpower saving.

The following is the coupling connection method.

安装 (1)

1. Check the burrs at the end of the steel pipe

安装 (2)

2. Lubricate the lip and back of the seal

安装 (3)

3.Seal the trap like a tube end

安装 (4)

4. Seal the trap into the other end of the steel pipe

安装 (5)

5. Clamp into the pipe fitting

安装 (6)

6. Stiffening bolt

Company profile

The company is located in Jiaozhou City, Qingdao, Shandong Province, China. The company mainly develops and produces remote liquid supply projects. The transfer of the emulsion or water to the desired place through a certain pressure. It is often used in fire fighting, coal mining, shipbuilding and other industries.

The company has about 100 personnel, with independent technology research and development department, quality inspection department, production department customer service department and other departments. Three steel pipe research and development and production equipment, dozens of various types of molds, more than 50 test equipment.

Since its establishment, the average number of complete long-distance liquid supply orders per year is about 60. The whole set of remote liquid supply project includes a certain length of steel pipe, steel pipe coupling, control gate valve, diverter, elbow, filter, accumulator and other products. The length is generally 1000 to 2000 meters most common. Among them, our company has done the longest long-distance liquid supply project for coal mines in China with a length of 6000 meters. This project was independently designed, developed and produced by our company. Up to now, it has been in good condition without any problems.

TONTR is located in the beautiful coastal city of Qingdao. It is a professional national-level high-tech industry engaged in the design, development, manufacture and sales of high-pressure pipeline systems.

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