Name: China Grooved Threaded Reducing Coupling Manufacturers Suppliers Factory - Low Price - Gangyuanlong
Brand: Juncheng
SKU: 306044807

Specification Table

Parameter	Detail
Material Grade	Ductile Iron
Process	Casting + Coating + Thread Cutting
Size Range	DN50–DN300 (grooved), DN15–DN100 (threaded)
Wall Thickness	Compatible with standard pipe schedules
Shape	Sleeve
Connection	Grooved + Threaded
Standard	GB 5135.11-2019
Application	Direct grooved-to-threaded pipeline connection

Direct Connection Between Grooved and Threaded Pipelines

The grooved threaded reducing coupling is designed to provide a direct connection between grooved large-diameter pipelines and smaller threaded outlets.
The fitting features a grooved end for the main pipeline and a threaded end for the branch connection, enabling a seamless transition between different connection standards.
A customer in Thailand used this product to connect a DN100 grooved main line to a DN50 threaded device inlet. Previously, multiple adapters were used, which resulted in leakage issues. After switching to our grooved threaded reducing coupling, the connection was completed using a single fitting with improved sealing performance.
The grooved threaded reducing coupling is manufactured from ductile iron through casting, coating, and precision thread cutting processes. Grooved sizes range from DN50 to DN300, while threaded sizes range from DN15 to DN100.

This fitting eliminates the need for flanges, welding, or multiple adapter assemblies.
It simplifies installation by integrating grooved-to-threaded transition into a single component, helping reduce potential leak points and installation complexity.
Jianzhi Group manufactures these couplings and supplies products to more than 130 countries. The company holds BSI and SNI certifications, and its production facility is equipped with DISA molding lines and German spectrometers for quality control.
The minimum order value is 10,000 RMB, and mixed sizes are acceptable within a single order.

OEM logo printing is available upon request.
Each grooved threaded reducing coupling undergoes 100% inspection prior to packaging, including thread inspection.
Warranty support is provided. Production updates, including photos and videos, are available upon request.
Flexible payment terms are available, including EXW, FOB, and DDP.