Proco - Model Style 261R - Molded Wide Arch Expansion Joint for Plastic/FRP Piping Systems
Proco Style 261R molded wide arch expansion joints have the lowest spring rates of any expansion joints currently on the market. They also boast low forces to deflect, and are built to withstand even the most rigorous piping system configurations. They allow for axial compression or axial extension, and lateral deflection as well as angular and torsional movements.
Some of the notable features and benefits of the Proco Series 261R are:
- Absorption of Directional Movement
- Absorption of Vibration, Noise and Shock
- Compensation for Misalignment
- Self-Cleaning Wide Arch
- Wide Choice of Flange Construction Materials Available
- Lighter Weight
Proco Series 260R Molded Wide Arch Expansion Joints are specifically designed for use with Plastic or FRP Piping Systems. An option for the standard spool-type expansion joints, the PROCO Style 261R & Style 262R have lower spring forces to compress, extend or laterally offset. The PROCO Styles 261R & 262R can be used on plastic or FRP pipes, pumps, valves and tanks without fear of the expansion joint being stronger than the pipe, pump, valve or tank flanges. In addition the PROCO Styles 261R & 262R are designed for tough demanding applications, as found in: Chemical & Petrochemical, Pulp Paper, Process Facilities, Industrial Piping Pollution Control Systems. The PROCO Styles 261R & 262R may be used where metallic hoses/expansion joints or old design rubber expansion joints may have been specified previously. Used on plastic tanks, pumps, chillers, cooling towers, compressors, blowers, fans, absorption machines, etc to: (1) Absorb Pipe Movements/ Stress, (2)Reduce System Noise, (3) Isolate Mechanical Vibrations, (4) Compensate Alignment/Offset, (5) Eliminate Electrolytic Action and Electrolysis, (6) Protect Against Start-Up/Surge Forces.
Low Spring Rates
The Style 261R have the lowest spring rates and forces to deflect of any expansion joint made today.
Absorbs Directional Movement
Thermal movements appear in any rigid pipe system due to temperature changes. The Series 260R wide arch expansion joints allow for axial compression or axial extension, lateral deflection as well as angular and torsional movements. (Note: Rated movements in this publication are based on one plane movements. Multiple movement conditions are based on a multiple movement calculation.)
Absorbs Vibration, Noise and Shock
The Proco Series 260R rubber expansion joints effectively dampen and insulate downstream piping against the transmission of noise and vibration generated by mechanical equipment. Noise and vibrations caused by equipment can cause stress in pipe, pipe guides, anchors and other equipment downstream. The Series 260R expansion joints will help relieve noise and vibration occurrences in a pipe system. Water hammer and pumping impulses can also cause strain, stress or shock to a piping system. Install the Series 260R to help compensate for these system pressure spikes.
Compensates for Misalignment
Rubber expansion joints are commonly used by contractors and plant personnel to allow for slight pipe misalignment during installation of new piping and or replacement applications. Installation tolerance should be kept to 1/8” per Fluid Sealing Association guidelines.
Self-Cleaning Wide Arch
The arches of the Series 260R are wide enough to allow the normal flow of the media to keep the arch clean of solids.
All PROCO Style 261R Molded Wide Arch Expansion Joints are drilled in accordance with ANSI 125/150# Standards. They should be installed against a flat face flange with the use of unique retaining rings specifically designed for the 260R series. Rings are fabricated from plate steel; zinc plated to prevent corrosion. Retaining rings are also available in 304 or 316 Stainless Steel upon request. Gaskets are not required with PROCO Style 261R.
The steel flanges of a spherical design (240/242) are heavy, especially for
plastic or fiberglass piping applications. The Style 261R Expansion Joints, including retaining rings, are considerably lighter than the spherical designs.
Proco Products, Inc. maintains one of the largest inventories of rubber expansion joints in the world. Please contact us for price and availability.
All products are reinforced with tire cord and metal materials.
- Products mark (S) are in stock items.
- All NN, NH & NP elastometer designated joints meet the Coast Guard Requirements and Conform to ASTM F 1123-87 and are marked accordingly.
Series 261R Rubber Expansion Joints Installed on Plastic/FRP Piping Systems Using Limit/Control Unit
Proco Series 261R wide arch expansion joints are specifically designed for use with plastic or FRP piping systems. They’re a suitable replacement for standard spool-type expansion joints, and posess exceptionally low spring rates compared to their conventional counterparts. With low forces to compress, extend, or laterally offset, these expansion joints can be used on plastic or FRP pipes, pumps, valves or tanks without fear of the expansion joint being stronger than the plastic or FRP pipe, pump, valve or tank flanges.
When pairing Series 261R expansion joints with standard control units utilizing control/gusset plates, a stiffener ring is required, in order to reinforce the mating flange. This technique distributes the pressure thrust loads experienced by the control units across the flange, as opposed to a standard installation where the loads are localized at the points of contact between the control/gusset plate and flange.