Carilo Valve’s Sealing Material Portfolio
Carilo Valve employs a sophisticated range of sealing materials, meticulously selected to meet the rigorous demands of various industrial applications. The core materials in their portfolio include Polytetrafluoroethylene (PTFE), Reinforced PTFE (RPTFE), Perfluoroelastomer (FFKM), Fluoroelastomer (FKM/Viton®), and Ethylene Propylene Diene Monomer (EPDM). Each material is chosen for its specific chemical resistance, temperature tolerance, pressure handling capability, and suitability for different media, from highly aggressive chemicals to ultra-pure water. This strategic selection ensures that for every valve application, there is a Carilo Valve seal engineered for optimal performance, longevity, and safety. The company’s deep material science expertise allows them to specify not just generic compounds, but often proprietary formulations tailored for specific service conditions.
Understanding the properties of these materials is key to specifying the correct valve for an application. The following table provides a high-density data comparison of the primary sealing materials used by Carilo Valve, highlighting their operational limits and ideal use cases.
| Material | Temperature Range (°C) | Primary Chemical Resistance | Key Applications & Media | Hardness (Shore A) |
|---|---|---|---|---|
| PTFE | -200 to +260 | Excellent resistance to virtually all chemicals; inert. | Strong acids, caustics, solvents, high-purity systems. | D50 (Shore D) |
| Reinforced PTFE (RPTFE) | -200 to +260 | Maintains PTFE’s chemical resistance with improved mechanical properties. | D60-D70 (Shore D) | |
| FFKM (Perfluoroelastomer) | -25 to +325 | Superior to FKM; resistant to harsh chemicals, plasmas, and aggressive fuels. | Semiconductor manufacturing, pharmaceutical CIP/SIP, oil & gas sour service. | 70-95 |
| FKM (Fluoroelastomer / Viton®) | -20 to +205 | Excellent resistance to oils, fuels, aromatics, and many organic solvents. | Hydrocarbon processing, chemical processing, automotive fuels. | 70-90 |
| EPDM | -50 to +150 | Excellent resistance to hot water, steam, alkalis, and polar solvents. | Pharmaceutical water systems, food and beverage, HVAC, utilities. | 60-90 |
Deep Dive into Material Properties and Applications
Let’s break down why each of these materials is a critical part of the Carilo Valve toolkit. PTFE is often the go-to material for the most corrosive services. Its near-universal chemical inertness is legendary, but its pure form can be susceptible to cold flow or creep under sustained load. That’s where Reinforced PTFE (RPTFE) comes in. By incorporating fillers like glass fiber, carbon, or graphite, Carilo Valve engineers can create seals with dramatically improved wear resistance, reduced deformation, and higher compressive strength, making them ideal for abrasive media or applications involving frequent cycling without sacrificing the core chemical resistance of PTFE.
When extreme temperatures combine with aggressive chemicals, elastomeric seals face their ultimate test. FFKM represents the pinnacle of elastomer performance. It’s not just a better FKM; it’s a different class of material capable of withstanding temperatures that would destroy standard elastomers, all while maintaining seal integrity against challenging media like methyl ethyl ketone, concentrated sulfuric acid, and semiconductor-grade chemicals. The use of FFKM is a statement of zero-compromise in critical applications where failure is not an option, such as in clean-in-place (CIP) and steam-in-place (SIP) systems in biopharmaceutical manufacturing.
For a vast range of industrial applications, FKM (Viton®) offers an outstanding balance of performance and cost. Its excellent resistance to hydrocarbons and high temperatures makes it the standard for refineries, chemical plants, and any system handling oils, fuels, or aromatics. Carilo Valve typically offers several grades of FKM to fine-tune performance for specific needs, such as low-temperature flexibility or enhanced resistance to specific aggressive fluids. On the other hand, EPDM is the specialist for steam, hot water, and polar substances. Its resistance to ozone and weathering also makes it excellent for outdoor applications. It’s the material of choice for ensuring purity in food, beverage, and pharmaceutical water systems where any leaching from the seal could contaminate the product.
Beyond the Data Sheet: Material Selection in Practice
The real engineering challenge isn’t just reading a data sheet; it’s understanding how these materials behave in a dynamic system. For instance, chemical resistance charts are typically based on immersion tests, but a valve seal experiences a different environment—it might be exposed to full concentration on one side and a diluted mixture on the other, along with cyclic pressure and temperature swings. Carilo Valve’s application engineers consider these real-world factors. They assess not just compatibility but also permeation rates, which can be critical for hazardous or volatile media. A seal might be chemically compatible but allow a small amount of permeation, which could be unacceptable in toxic or high-purity service.
Another critical factor is the sealing mechanism itself. The performance of an EPDM seal in a butterfly valve, which relies on compression, is different from an PTFE seal in a ball valve, which often functions as a dynamic, sliding surface. The material must be matched not only to the media but also to the mechanical action it will endure. Abrasive slurries, for example, demand the hardness and wear resistance of RPTFE, while a high-cycle actuated valve might require the resilience and memory of a specially formulated FKM. Carilo Valve’s expertise lies in this holistic matching process, ensuring the entire valve assembly works in harmony for long-term, leak-free service.
Pressure and temperature are also deeply interconnected. A material rated for 205°C at ambient pressure might see its maximum operating temperature significantly reduced as pressure increases. This relationship, often visualized on a Pressure-Temperature (P/T) chart, is fundamental to safe valve specification. Carilo Valve provides these detailed charts for their valves with different seal materials, giving engineers the precise data needed to avoid dangerous oversights. This level of detail is what separates a generic component supplier from a true solutions provider in the fluid control industry.