Threaded Union Type Rubber Expansion Joint

Rubber Expansion Joint

Size: DN15-80

Screw standard: BSPT/NPT

Product Description

Description

The Thread End Rubber Expansion Joint is a compact and flexible solution designed to absorb vibration, reduce noise, and compensate for thermal movement in small-diameter pipelines. With threaded connections on both ends, this joint is especially suitable for systems where flanged connections are not practical.

Made from high-quality EPDM or NBR rubber, the thread end rubber expansion joint is reinforced with strong synthetic fabric and internal steel rings to ensure stability under pressure and long-term durability. It is commonly used in residential piping, HVAC units, cooling systems, and small industrial lines.

This type of joint allows for axial compression and extension, making it ideal for tight spaces and compact installations. It also helps prevent pipe damage by relieving stress caused by vibration and movement.

Available in various thread sizes and pressure ratings, our thread end rubber expansion joints are engineered for easy installation and maintenance-free operation.

As one of China’s top rubber joint manufacturers, we deliver reliable, certified solutions trusted by plumbing contractors and industrial engineers worldwide.

Material:

1. Joint: Cast Iron
2. Liner: NBR, EPDM
3. Frame: Nylon cord fabric
4. Pressurized ring: Steel wire

Features:

1. Greatly absorb pipe movements, relieve stress, reduce system noise/vibration
2. Small volume, small weight, good flexibility, easy installation and maintenance
3. Strong resistance of acid, alkali, oil, and electrolytic
4. Working Pressure: 1.6Mpa

Standard of implementation

Attribute	Details
WORKING Pressure (Mpa)	1.6
Bursting Pressure (Mpa)	3
Angle of Deflection	15°
Vacuity Kpa (mmhg)	-15~115°
Applicable Media	Air, Compressed Water, Weak Acid, Alkali, etc

Standard Materials Of Main Parts

ITEM	PART NAME	MATERIAL
1	Joint	Cast
2	Liner	NBR
3	Farm	Stainless
4	Steel wire	CS

Dimensions:(mm)

SIZE (in)	DN	L	Axial Displacement (Stretch)	Axial Displacement (Compression)	Lateral Displacement
1/2	15	180	5~6	22	22
3/4	20	180	5~6	22	22
1	25	180	5~6	22	22
1 1/4	32	200	5~6	22	22
1 1/2	40	210	5~6	22	22
2	50	220	5~6	22	22
2 1/2	65	245	5~6	22	22

Tianjin Guoji Valve Co., Ltd. is an export-oriented valve manufacturer with 15,332 square meter factory area, which has strong capability of R&D, Manufacture, Trading and Service. Now our company has passed the Lloyd's Register (LR) ISO9001: 2015 quality management system certification (ISO Approval number: ISO 9001 – 00033059) and CE/PED certification (EU Certificate Of Conformity). (Certificate No: 0343/PED/SHA/BJG00001668/A).
TGV's products covered Butterfly valves, Check valves, Strainers, Gate valves, Ball valves, Globe valves, Expansion joints, Flanges and Fittings with pressure range from 0.5 to 6.4 MPa, size from DN15 to DN3000. The products also have been widely exported to more than 30 countries and regions.
We aim at deliver only quality valves with professional services, we see quality and service as life and always take our reputation and promises seriously.