When purchasing a rubber expansion joint, there are several things you need to keep in mind. There are several different types of rubber expansion joints available. The type that is best for your application will depend on the design of your property. There are also many different types of materials that you can use for your joint. These materials include NBR, HNBR, Metraloops, Style 301, and more.
NBR
Typically, an NBR rubber expansion joint is made of a single sphere and is used in piping systems. These joints have high pressure and elasticity and can reduce noise and vibration. They can also solve various piping issues and meet a variety of material requirements.
Metraloops
If you’re considering installing a Metraloops rubber expansion joint on your pump, you’ll want to make sure you choose the right one. Unlike many other types of expansion joints, these do not require restraints on the piping on either side. Instead, they feature integrated control rods to avoid stress transfer to the piping. In addition, Metraloops are designed to accommodate both the thermal movement of adjacent piping and the design movement of the build joint. To get the correct sized expansion joint, you’ll need to add up these movements.
Style 301
Unisource’s Style 301 rubber expansion joint features a steel flange with https://evrproducts.com/products/rubber-expansion-joints/ a galvanized steel float. The flange engages the rubber beaded end of the expansion joint with a fast, smooth rotation. The design is particularly useful for isolating small diameter piping from vibrations generated by mechanical equipment.
Flexi-Spool
The Flexi-Spool rubber expansion joint is a versatile piece of rubber piping equipment that can handle a variety of applications. The joint can be made in a single sphere or double sphere configuration. Its end fittings are either female union or eccentric and come with standard carbon steel or 300# stainless flanges. The material is highly elastic and can accommodate large deformations.
Style 711 Plus
The Style 711 Plus rubber expansion joint is designed to provide the highest level of safety, flexibility, and performance. This expansion joint is made with an integral backing ring with built-in gusset plates to eliminate the problem of plastic flange cracking. In addition, the 711 Plus has a full-face built-in rubber face, which allows it to handle more movement than its Metrasphere counterpart. It also offers a lower spring rate than its 100HT counterpart.
Style 301 single sphere
A Style 301 single sphere rubber expansion joint is designed to withstand pressures and temperatures up to 230 degrees Fahrenheit. Aside from providing high performance, this type of joint also reduces vibration, pulsation shocks, and noise transmission. Other features include a self-cleaning arch and solid plate flanges for easy installation.