Flexible Coupling

The flexible coupling is a type of fitting designed to connect pipes using a specialized groove and seal ring mechanism. It helps to absorb pipe movement and vibrations, effectively minimizing the risk of pipe failure. This product makes pipe installation and removal easier while delivering superior sealing performance to maintain system integrity and reliability. Its versatility makes it ideal for use in fire protection, water supply, HVAC, petrochemical applications, and more, particularly in pipe systems that demand flexibility, seismic resistance, and leak-proof connections.

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Product Description

Material: ASTM A536, GRADE 65-45-12, QT450-10
Threads: ASME B1.20.1,ISO 7-1,BS21,BSPT,NPT,GB 7306
Size: ISO6182,AWWA C606
Size Available: 1"-24"
Surface Treatment: Electrophoretic painted
Electroplated, Epoxy, Hot-dip Galvanized

Air pressure and holding pressure schedule
NO.	Size	Pressure	Time to keep the pressure	Remark
1	≤DN50	≥0.5MPa	≥5s	Air pressure
2	>DN50~DN350	≥0.5MPa	≥10s	Air pressure
3	>DN350	1.5times the rated working pressure	5min	water pressure

Rubber gasket
Name	Recommended Application Medium	Related Standards	Recommended Application Temperature Range
E:EPDM	water supply,drainage, sewage,normal temperature air,weak acid,and weak alkali	GB5135.11	-30℃~+130℃
		GB/T 21873	-22°F~+266°F
	continuous supply of 110℃ hot water	GB/T 27572
D:NITRILE	petroleum,vegetable oil, mineral oil	GB5135.11	-20℃~+80℃
D:NITRILE	petroleum,vegetable oil, mineral oil	GB/T 23658	-4°F~+176°F
S:SIUCON	drinking water	GB/T 28604	-40℃~+180℃
S:SIUCON	high-temperature dry air and some high-temperature chemicals	GB5135.11	-40°F~+356°F
F:FLUORINE	the acid,alkaline solution,and hot lubricating oil	HG/T 2181	-20℃~+180°
F:FLUORINE	the acid,alkaline solution,and hot lubricating oil	HG/T 2181	-4°F~+356F
V:NEOPRENE	seawater		'-20°℃~+100℃ -4°F~+212°F

Nominal Size mm/in	Pipe O.Dmmin	Working Pressure PSVMPa	Bolt Size	Dimensions L mm/in			UL	FM
			No.-Size mm	φ	L	H
25 1	33.7 1.327	500 3.45	2-M10x45	57.5 2.264	99 3.898	43.5 1.713	UL	FM
32 1-1/4	42.4 1.669	500 3.45	2-M10x45	70 2.756	106 4.173	44 1.732	UL	FM
40 1-1/2	48.3 1.900	500 3.45	2-M10x45	73 2.874	108 4.252	44 1.732	UL	FM

50 2	60.3 2.375	500 3.45	2-M10x55	87 3.425	123 4.843	44 1.732	UL	FM
65 2-1/2	73.0 2.875	500 3.45	2-M10x55	100 3.937	138 5.433	44 1.732	UL	FM

65 2-1/2	76.1 3.000	500 3.45	2-M10x55	103 4.055	142 5.591	45 1.772	UL	FM

80 3	88.9 3.500	500 3.45	2-M12x60	117 4.606	166 6.535	45 1.772	UL	FM
100 4	108.0 4.250	500 3.45	2-M12x65	137 5.393	188 7.401	48 1.889	UL	FM

100 4	114.3 4.500	500 3.45	2-M12x65	139 5.472	190 7.480	49 1.929	UL	FM

125 5	133.0 5.250	300 2.07	2-M12x75	162.6 6.401	216 8.504	48 1.889	UL	FM
125 5	139.7 5.500	400 2.75	2-M12x75	168 6.614	218 8.583	49 1.929	UL	FM

125 5	141.3 5.563	400 2.75	2-M12x75	167 6.575	219 8.622	49 1.929	UL	FM

150 6	159.0 6.250	300 2.07	2-M12x75	189.4 7.456	240 9.448	48 1.889	UL	FM
150 6	165.1 6.500	400 2.75	2-M12x75	193 7.598	241 9.488	49 1.929	UL	FM

150 6	168.3 6.625	400 2.75	2-M12x75	198.5 7.815	249 9.803	50 1.969	UL	FM
200 8	219.1 8.625	300 2.07	2-M1ArA	253 9.961	320 12.598	59 2.323	UL	FM

250 10	273 10.748	300 2.07	2-M22x130	335 13.189	426 16.772	68 2.677	UL	FM

300 12	323.9 12.752	300 2.07	2-M22x130	380 14.96	470 18.504	65 2.559	UL	FM

Product Description

Flexible Couplings are mechanical devices designed to transmit torque from one shaft to another while accommodating various degrees of misalignment between the two shafts. They are engineered to provide flexibility in motion, allowing for angular, parallel, and axial misalignments without transferring undue stress to the connected machinery. These couplings are typically made from materials that can endure high torque loads and are resistant to wear and tear.

Features

· Misalignment Compensation:Flexible couplings can handle significant angular, parallel, and axial misalignments, reducing the stress on connected equipment.

· Vibration Dampening:They absorb and reduce vibrations, which helps in extending the life of the machinery.

· Shock Load Absorption:Flexible couplings can absorb sudden shock loads, protecting the connected shafts from damage.

· Material Options:Available in a variety of materials, including rubber, polyurethane, and metallic alloys, to suit different application requirements.

· Easy Installation:Designed for simple installation and maintenance, often requiring no lubrication.

Application

Flexible couplings are widely used in various industries, including manufacturing, automotive, aerospace, and marine. They are ideal for applications where shaft misalignment is common due to thermal expansion, manufacturing tolerances, or other factors. Some typical applications include pumps, compressors, conveyors, and general machinery.

Faq

1. How do I choose the right flexible coupling for my application?

Selecting the right flexible coupling involves considering factors such as torque requirements, misalignment compensation needed, environmental conditions, and the type of connected equipment.

2. Can flexible couplings be used in high-speed applications?

Yes, many flexible couplings are designed to operate efficiently at high speeds, but it is important to choose a coupling that is balanced and rated for such applications to avoid vibrations.

3. What are the signs of a failing flexible coupling?

Common signs of wear include increased vibration, noise, and heat. Regular inspection can help identify cracks, tears, or other damage to the coupling material.

Installation instruction for Flexible coupling &Rigid coupling


1Take out the Flexible &Rigid coupling	2Split the Flexible &Rigid coupling	3pipe preparation	4Lubricate gasket

5Gasket installation	6Housing installation	7Tighten nuts	8installation completed Grooved coupling