Click To Chat For Online
Position : Home > NEWS > Product knowledge

Advantage of mechanical coupling


The mechanical coupling is a new type of line connection device, which can replace the flange and the compensator providing connections for pipes and tubes, pipes and valves in various pipelines. In the same use occasions and conditions. The telescopic device has been widely used in petrochemical industry, ships, power and other industries in China. The expansion device is characterized in the chemical pipeline instead of the compensator. When installed, the connecting cover are respectively sheathed, the sealing ring and the sleeve should be installed on both sides of the pipe then tighten the bolts. At both ends of the pipeline in casing leave some space for axial slip, when the expansion and contraction of the pipeline can freely telescopic but no leakage.

The stress situation of the dresser coupling structure inner wall of the gland, Sealing ring 3. Socket bolt. The expansion with the sealing ring selection is very important, can choose according to different using conditions, the operating temperature. 1 in 30 ~ 80 DEG C can be chosen chloroprene rubber and nitrile butadiene rubber (NBR) of the sealing ring and the oil resistance and aging resistance are very good, acid and alkali resistance, used for normal temperature water, cold water, hot oil and some chemicals occasions.
The dresser coupling material using carbon steel, stainless steel material, product structure design is reasonable, stable performance, displacement compensation is unparalleled. The operation principle of the dresser coupling is the phenomenon that the pipeline is damaged due to uneven stress by using the self expandable property.
Advantage of mechanical coupling


Rubber Expansion Joint

Rubber expansion joint is widely used in the field of chemical industry, construction, supply water, sewage drainage, petroleum, light and heavy industry, sanitation, plumbing, electricity and other fundamental engineering.

Dismantling Joint

Dismantling Joints are used to connect Flange on the one side and weld pipe on the other,modulate the product's length in between

Duckbill Check Valve

Duckbill check valve is a simple, reliable, cost effective method of backflow prevention. The series flange integral duckbill check valve is designed to be installed between two mating flanges.

Expansion Bellows Compensator

Metal bellows expansion joints (also called Metal Expansion Joint) are compensating elements for thermal expansion and relative movement in pipelines, containers and machines.


Valve is not only own with the functions of opening quickly, easy to maintain, good sealing but also safety fire-safe and Antistatic designs.

Shock Absorber

Shock absorber is adopted in ductile iron, which improves the plasticity and toughness of the product, and the strength of the steel is higher than that of the carbon steel

Pipe Accessory

S312,S404 Water-Proof Sleeve is generally applied to the structure with requirement of vibration or water proof in the position.


Gongyi xinli pipeline equipment Co.,Ltd is an international and professional company,which engages in research & development