Rubber Expansion Joints

Our rubber expansion joints help to reduce stress in piping systems that is the result of mechanical or thermal movements. Built from durable synthetic or natural elastomers, Flextech rubber expansion joints are resistant to corrosion and erosion. They are capable of absorbing movements in piping systems that are the result of thermal reactions or vibrations.

Description
About DIEFEI

Expansion joints are devices containing a bellows membrane that are designed to absorb
dimensional changes, such as those that occur due to thermal expansion or contraction
of a pipeline, duct or vessel.

Stainless steel 304 Rubber Expansion Joint For Pipe Line has been widely used in the
chemical industry, oil industry,construction, water supply drainage, fire production industry, etc.

Rubber Materials: NR, NBR, CR, EPDM, PTFE, etc.
Flange Materials: 304 stainless steel, Inconel 625, carbon steel, PVC.
Standard: GB, ISO, DIN, ANSI, BS, JIS, as well as customers'special demand.

Specification:

Item	Specification
Operating condition	PN: 1.0/1.6/2.5 Mpa
The water temperature	up to 120℃
Material	EPDM/NBR/NR body with Carbon steel flange
Size	DN20 – DN3000
Structure	Single Sphere, Double Sphere or more
Standard of Flange	BS, DIN, ANSI, JIS or others provided drawing samples
Media	Hot Air, SO2, Steam, Water, Oil, Acid,Gas And etc.
Threads	DIN, BSPT, BSP, NPS, NPT, Metric, (ISO7/1, DIN 2999, ANSI B1.20.1)
Surface	Galvanized, Epoxy

Production Specification:

1.it is strictly prohibited to install over the displacement limit.
2.The mounting bolts should be symmetrical and gradually tightened to prevent partial leakage.
3.Working pressure above 1.6.MPa, the mounting bolts should have elastic pressure pads to prevent
the bolts from loosening during operation.
4.When installing vertically, the joint pipe should have vertical force support at both ends, and the
anti-pull device can be adopted to prevent the work from being pulled off.
5.The rubber joint installation site should be away from the heat source. Ozone area. It is strictly forbidden
to expose the radiation and use media that does not meet the requirements of this product.

ABOUT US

Hebei Diefei Valve Co., Ltd., which was established in 1986,is a specialized factory gathering the medium and lower pressure valve developing, manufacturing and selling together. We established Crane Ningjin Valve Co., Ltd with Crane Valve USA in 1995.
Our main products are Butterfly valve, Check Valve, Gate Valve, Ball Valve, Valve Actuator and so on. These valves are available extensive to the pipelines of oil, metallurgy, chemical industry, medical, light textile, paper-making, water and electricity ,tap water company ,central air conditioning system etc.
We own perfect manufacturing process and testing way of casting, matching and assembling. We are authorized the Quality Management system certificate of ISO9001:2015, Environmental Management system certificate of ISO14001:2004,CE Certificate and the Approval of Manufacturer Certificate of DNV. Our company products are mainly sold to many large-scale agglomerations like CNPC, Sinoepc, CSPC, DAIKIN , Haier, Midea and etc. And exported to USA, Europe, Africa, Southeast Asia, Taiwan etc countries and area.
We are willing to serve our customers at home and abroad with our excellent products and services.