Proco Style 240 Spherical Molded Expansion Joints are designed for piping systems to absorb pipe movements, relieve stress, reduce system noise, vibration, compensate for misalignment offset and to protect rotating mechanical equipment against start-up surge forces. Internal pressure within a “sphere” is exerted in all directions, distributing forces evenly over a larger area. The spherical design “flowing arch” reduces turbulence and sediment buildup. Bolt holes on flanges are threaded or smooth drilled bolt holes.
Features
- Absorbs Directional Movement, Vibration, Noise and Shock: Thermal movements appear in any rigid pipe system due to temperature changes. The Style 240 spherical arch expansion joints allow for axial compression or axial extension, lateral deflection as well as angular movement. The Proco Style 240 molded expansion joints effectively dampen and insulate downstream piping against the transmission of noise and vibration generated by mechanical equipment. Noise and vibration caused by equipment can cause stress in pipe, pipe guides, anchors and other equipment downstream. Water hammer and pumping impulses can also cause strain, stress or shock to a piping system.
- Rotating Carbon Steel Flanges: The floating metallic flanges freely rotate on the bellows, compensating for mating flange misalignment. Gaskets are not required with the Style 240, provided the expansion joints are mated against a flat face flange as required in the installation instructions. Furnished complete with galvanized carbon steel floating flange ends for corrosion protection, ANSI 125/150# drilling. Bolt holes on flanges are not threaded, they are smooth drilled bolt holes.
- Service Range: Vacuum rating is 26" Hg. Maximum pressure is 225 PSI at 170F. Temperature range is -50F to +230F.
- Material Identification: All Style 240 molded expansion joints have branded elastomer designations. Neoprene Tube/Neoprene Cover (NN) with a blue stripe and Nitrile Tube/Neoprene Cover (NP) with a yellow stripe. Joints meet the Coast Guard Requirements and conform to ASTM F1123-87. 240C/NP-9 joints have ABS certification.
