Proco - Model Series 231/ET -PTFE Lined Rubber Expansion Joints

Chemically resistant against the entire pH range, PROCO Series 231 PTFE expansion joints are designed to handle practically every chemical plant application. Installed next to mechanical equipment or between anchor points of a piping system, specify the PROCO 231/ET 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. Our history in the manufacture of expansion joints dates back to 1930. When you need an engineered rubber expansion joint solution to a piping problem, call PROCO.

Series 231/ET. The new and improved PROCO Series 231/ET will complement the existing PROCO Series 251/ET expansion joint. This new molded product has been completely re-engineered to provide improved strength, flexibility and movement capabilities. Manufactured utilizing tire cord industry technology, the Series 231/ET combines woven polyester tire cord into a fabric matrix and bonded with a EPDM elastomer that is reinforced with metal and bonded to a PTFE liner to create a product with greater operating performance. Note: The PTFE liner extends to the bolt circle of the bottom of bolt holes.

Greater Movements with a Lower/Wider Arch Profile
The movements for the PROCO Series 231/ET exceed the specification of the Fluid Sealing Association’s, Rubber Expansion Joint Division Technical Handbook (7.3 Edition), Table VI. Due to a new and improved lower, wider profile arch, more axial compression and extension coupled with lateral and angular movements can be obtained without increasing the face-to-face requirements. For greater movements based on re-engineering and new product construction for highly corrosive piping installations, specify the PROCO Series 231/ET PTFE lined expansion joints.

Chemical Service Capability at Minimal Cost
Expensive, exotic metal expansion joint for low temperature service can be replaced with the PROCO Series 231/ET PTFE lined expansion joints. Engineered to operate up to 225 PSIG and 250°F, the PROCO Series 231/ET can be specified for a wide range of piping system requirements. Our standard stock is furnished with an exterior EPDM cover. Compared to metal, plastic or other rubber-backed competitive products, you will invest less and have access to in-stock availability with the high quality PROCO Series 231/ET.

Specifications Met
PROCO has assigned conservative pressure ratings to the Series 231/ET PTFE lined rubber expansion joints. The ratings, however, meet the requirements of the Fluid Sealing Association’s, Rubber Expansion Joint Division Technical Handbook (7.3 Edition), Series C. The pressure ratings for the Series 231/ET PTFE lined rubber expansion joints have been fully tested and are based on a minimum 4 to 1 safety factor. For pressure protection with confidence, specify the PROCO Series 231/ET.

Prevents Electrolysis and Electrolytic Action
In Chemical applications when metallic expansion joints are used, they are generally of a metal dissimilar from the pipeline. This may create an electrolytic galvanic action that could be destructive to the connector equipment or piping system. The use of the rubber-backed PROCO 231/ET PTFE lined expansion joints prevents this potential hazard. Additionally, our 231/ET expansion joints are non-conductive and eliminate the metal-to-metal contact at the flange face thus stopping electrolysis.

Absorbs Vibration - Noise - Shock
The PROCO Series 231/ET PTFE lined rubber expansion joints are a replacement for “sound transmitting” metallic expansion joints. Sound loses energy traveling axially through an expansion joint. Water hammer, pumping impulses, water-borne noises and other forms of strain-stress-shock are cushioned and absorbed by the PTFE lined/rubber elastomer expansion joint, not related to piping. Install the Series 231/ET in a system to reduce vibration transmission when the piping section beyond the expansion joint is anchored or sufficiently rigid. For quiet, stress-free systems specify the PROCO Series 231/ET.

Large Inventories Mean Same-Day Shipment
We maintain the largest inventory of expansion joints in the world. Rubber, PTFE Lined, Plastic or Metal Hose — PROCO can ship the products you need when you need them! In fact, when it comes to expansion joints, if PROCO doesn’t have them in stock … nobody does!

Information - Ordering - Pricing - Delivery
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