Double Sphere Rubber Expansion Joint

1) Designed according to ANSI, DIN and BS

2) Type: Double sphere joint flange type

3) Main body: EPDM, NBR, neoprene

4) Lining: Chinlon cord fabrics

5) Frame: Hard steel wires

6) Flange: Carbon steel, stainless steel

7) Union: Malleable iron

9) Size: 1/2″ to 24″

Product Description

Description

The Double Ball Rubber Expansion Joint is engineered to absorb vibrations, reduce noise, and compensate for thermal expansion in industrial piping systems and water networks. Its dual-sphere design enhances flexibility, providing superior movement absorption compared to single-ball models. This makes it ideal for applications where greater axial, lateral, and angular displacement is required.

Made from high-quality rubber materials such as EPDM, NBR, or Neoprene, and reinforced with strong synthetic fabric, this joint is built for durability and resistance to pressure, temperature, and corrosion. It is commonly used in HVAC systems, wastewater treatment, chemical plants, and pump installations.

The Double Ball Rubber Expansion Joint offers easy installation with flanged or threaded ends, and is compatible with a variety of pipeline materials. Its robust construction helps extend system life by reducing mechanical stress on connected components.

As a leading rubber joint manufacturer in China, we provide reliable expansion joint solutions designed for demanding industrial environments.

Standard Materials Of Main Parts

ITEM	PART NAME	MATERIAL
1	Sphere	EPDM/NBR
2	Flange	CS

Dimensions:(mm)

SIZE			Axial Disolacement		Lateral Disolacement	Pn16			Pn10
in	DN	L	Stretch	Compression	Lateral Disolacement	D	D1	n-d1	D	D1	n-d1
2	50	165	30	50	45	165	125	4-18	165	125	4-18
2.5	65	175	30	50	45	185	145	4-18	185	145	4-18
3	80	175	35	50	45	200	160	8-18	200	160	8-18
4	100	225	35	50	40	220	180	8-18	220	180	8-18
5	125	225	35	50	40	250	120	8-18	250	210	8-18
6	150	225	35	50	40	285	240	8-23	285	240	8-23
8	200	325	35	50	40	340	295	12-23	340	295	8-23
10	250	325	35	60	35	405	355	12-27	395	350	12-23
12	300	325	35	60	35	460	410	12-27	445	400	12-23
14	350	325	35	60	40	520	470	16-27	505	460	16-23
16	400	325	35	50	40	580	525	16-30	565	515	16-27

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.