fluorocarbon elastomers have gained wide acceptance as a material of construction for knife gate valve seats. VITON (V) Flow-Tek offers PEEK in two grades, unfilled and filled. PTFE has a temperature rating of -20F to 400F in valve applications. Fillers including graphite enable this seat material to have a better cycle life than other lled or reinforced TFE seats. YDelrinAF is a high pressure seat material. Download English. Its temperature stability is good to 550F and it is a high strength alternative to fluoropolymers used for valve seats. Temperature Range: -4F to 302F; Pressure Range: 29inHg to 580 PSIG; see pressure/temperature curve; . They provide a variety of options from seat material, sealing designs, and range of . The material of the seat can be . Fully captured spiral-wound graphite filled body gasket on split body designs. Seat Temperature Ratings The temperature ranges given below are for ideal conditions and may vary with a specific application or service. See Application Guidelines or consult the factory for further information. Valve Type Minimum Temperature Maximum Temperature; o C o F o C o F; Ball-55-65: 300: 575: Butterfly-30-20: 538: 1000: Butterfly Neck-18: 0: 260: 500: . high temperature applications, including steam . Its chemical compatibility is excellent and is suitable for almost all applications. seat material approximate perating temperature typical asme class advantages distinguishing features disadvantages incompatibilities virgin ptfe -73c to 204c cl150 to cl300 7vs`[l[yh\vyvl[o`slul -very good chemical resistance (inert) =ly`zvm[th[lyphs^p[osv^jvlmjplu[vm friction resulting in low operating torques -non-contaminating and 316 is resistant to dilute solutions (1-5%) of sulfuric acid to 49C (120F), except in some oxidising acids, where 316 is less resistant than 304. They are made from a DupontAcetal homopolymer and are filled with Teflon and glass fiber. Its continuous use temperature can be up to 260and load thermal transformation temperature of 30%GF or CF reinforced brand is up to 316. Temperature range is -50C to 260C. . The soft insert is located into a groove in the metallic seat carrier. A216-WCB A350-LF2 CL1 Low Temperature Carbon Steel Temperature Range -50F to 350F. Fluorocarbon can be used in most applications involving mineral acids, salt solutions, chlorinated hydrocarbons and petroleum oils. 15% glass reinforced PTFE, suitable for temperature -50F to 450F, chemical resistance is compatible to virgin PTFE with better wear factor. For oxygen services, body and trim materials shall be AISI-316 stainless steel. Fillers including graphite enable this seat material to have a better cycle life than other filled or reinforced TFE seats. PTFE is a cost-effective material in applications such as chemical processing or oil and gas. Temp: 140F; Max. The most common fluoropolymer application is in process valves. It was designed for the valve industry as a seat material to provide a wide temperature and pressure range. 316 is prone to carbide precipitation from 427C to 816C (800F to 1500F) Corrosion . PTFE temperature rating ranges from -50F to 400F. The trim typically includes a disk, seat, stem, and sleeves needed to guide the stem. Chalky White Virgin Teflon (PTFE) Regardless of valve type, all stem-actuated control valves require some form of seal allowing motion of the stem from some external device (an actuator) while sealing process fluid so no leaks occur between the moving stem and the body of the valve. Technical Bulletin Pneumatic Actuator Engineering Data Series 92/93. Carbon filled TFE is an excellent seat material for steam applications as well as high effeciency oil-based thermal uids. Locking lever or gear operator standard. VALVE SEAT MATERIAL SELECTION GUIDE Choosing the Right Seat Material is the Most Challenging Decision in Ball Valve Selection 8323 N. Eldridge Pkwy #100 Tel: 832.912.2300 www.flow-tek.com PCTFE is resistant to cold flow and it has the lowest coefficient of thermal expansion of any unfilled fluoropolymer. Like PVC, PP has low heat resistance with a max temperature of 80C. Operating Size Range - Types of valves and their typical operating sizes. 3. It's chemical compatibility is excellent for almost all media service applications. OTOH: I wouln't trust a PTFE Faucet washer at 100 psi. The material has a useful temperature range of -400F to 380F. Thanks CKChi for your input. The valve seat material is just as crucial as the valve body. Temperature Range. DelrinHigh pressure up to 5000psi dependant on valve size and temperature range of -50F to 180F . Temperature range -50 F to 450 F. C to 120 deg. The service temperature range is -50F to 450F. Carbon Filled PTFE Carbon filled TFE -25% Carbon Graphite with 75% TFE - is good for temperature ranging from -55C to 270C. Material Description Color Reinforced Teflon (RPTFE) Reinforced Polytetrafluoroethylene (RPTFE) is the standard seat used in most non-cavity Tru-Flo ball valves. Control Valves - Leakage Classification - Seat leakage classification through control valves. Wide Temperature Range - High-performance, flexible-lip seals extend the operating temperature range of butterfly valves. . This is used as a seat material in our steam and high temperature & pressure solenoid valves as well as some of our ball valves and butterfly valves. Maximum Allowable Operating Pressure. and cost effectiveness. Made from Virgin Teflon, this is the most common valve seating material; its . The key specifications for cast steel valves body materials are ASTM A216 (WCA, WCB, WCC), ASTM A352 LCB/LCC (low-temperature), and ASTM A351 CF8/CF8M. "Most of us use stainless steel knives, forks and spoons, but the material probably wouldn't be appropriate for valves. dirt, or any foreign material in the valve for the . C). . Other challenges with cryogenic services include seat leakage potential. If the seal material is not adequate to handle a temperature exceeding its cold rating, it will fail, which can result in the valve freezing, or worse. The trusted Ladish name offers customers a complete and innovative product portfolio designed for the most demanding corrosive, erosive and high purity applications. Meets ASME B16.5, B16.10 and B16.34 design. Refer to actual ASME chart for valve selection, this chart (updated as of 2012) is a general guide only. One globe valve manufacturer has PTFE seats rated for 6000 psi, due to some clever design. The general temperature rating for a resilient seated valve is 25 Degrees F to 300 Degrees F and 400 Degrees F to 450 Degrees F for a high-performance butterfly valve. PEEK offers excellent chemical resistance, very low friction, self-lubrication, and is flame retardant while also possessing a wide operating temperature range (from -70F to 550F). The valve seat can either be bolted in (field replaceable) or integral to the valve body. . Temperature range -60C to 204C. All Model TBS slab gate valves are API 6A Latest Edition Monogrammed and are available in bore sizes from 4 1/16" thru 7 1/16" with features as follows: Frac valve service. EPDM is a standard seat material offered in Bray resilient-seated butterfly valves. Easy Automation Like traditional butterfly valves, Wafer-Sphere Temperature rating is from -20F to +300F. Various grades of stainless steel (such as 303, 304, and 316) are available too. O-Ring Seat Valve Pressure & Temperature Limits Orifice Pressure Range, psig1 Pressure Range, barg1 Elastomer Seat PTFE Seat Elastomer Seat PTFE Seat C High Pressure 15 to 1480 800 to 2500 2501 to 5000 1.0 to 102 55.1 to 172 172.1 to 345 D High Pressure 15 to 1480 800 to 1600 1601 to 5000 1.0 to 102 55.1 to 110 110.1 to 345 standard seat material for most A-T Controls floating ball valves. These characteristics make it an excellent choice when dimensional stabilityis critical. It occurs as a white solid at room temperature. Max. However, it should not be used in high-pressure conditions. Body casting shall internally be completely machined to a smooth surface to remove any casting imperfections. Its temperature steam. Temperature Ranges - minus 40F to 250F. The linear and radial growth of the stem in relation to the body often can be underestimated. At very low temperatures, Teflon shows very high strength and toughness with self-lubrication properties. PCTFE M-400H Material Properties: Compressive Strength (D-695): 5000-5500 psi Tensile Strength (D-638): 4800-5300 psi Elongation: 100 - 200% temperature range of -56 C to 315C and steam service up to 260 C. Seat Material: NBR, EPDM, VITON, PTFE: End Connection: Wafer, Semi Lug, Full Lugged, Double Flange: And because butterfly valves are quarter-turn, the actuated valve profile is much smaller than linear valves. Up to 750F (399C) Stem Materials. Application Range Wafer-Sphere designs and materials can handle a broad range of services. With compounding, this range can be extended to -65 and 300F, but rarely operates at both extremes and always as a special compound. Ball and seat coatings prevent damage to erosion and galling during cycling. A proprietary product for high-temperature, high-pressure, flammable and corrosive critical process applications, the KTM Gratite seat offers superior performance and reliability. Showing 1 to 8 of 8 entries Other o-ring compounds are available. This design can be used in a broad temperature range of -320F to 1,500F in varying configurations due to the metal-to-metal sealing. 15% glass filled reinforced Teflon offers good chemical resistance and improved cycle life. RANGER produces a complete line of specialty valves in a wide range of materials including titanium, monel, hasteloy, and others. It offers excellent chemical and water resistance and is unaffected by continuous exposure to hot water or steam. The density of this material is about 2200 kg/m 3. A double offset butterfly valve with firesafe design, I guess the primary seat is PTFE and secondary seat seal is metal. For most performance applications, the exhaust valve material of choice is 21-4N - or titanium. The most common applications in valves are for stem material in butterfly valves and back-seat bushings and wedges in cast steel valves. The most challenging decision when selecting a Ball Valve is choosing the right Seat Material. Trim Material: A105 + ENP, LF2 + ENP, F304, F316, F51, F55 . For PN ratings under ISO 75001-1 (AS4331) the pressure/temperature ratings are proportionately extrapolated, refer to ISO 75001-1. DELRIN 2018, Available here. Ladish designs and manufactures a wide range of engineered gate, globe, check and ball valves in stainless steel, duplex and high nickel alloys. We have also helped customers with Glass Filled PTFE parts for applications such as pump housings, gaskets, roller coverings . Temperature -50F to 470F. Titanium is often viewed as the ultimate valve alloy material because of its lightness. Mechanical properties PEEK raw material resin has good toughness and rigidity, and it has excellent fatigue resistance to alternating stress comparable to alloy materials. Typically we hard face a stainless steel seat with Stellite then lap the ball to the seat for tight shut-off. Metal to Metal sealing (gate to seat-seat to body-backseat fire safe seal) Non-rising stem design. service. We provide valve seats, manufactured from our AF range of materials, including PTFE and filled PTFE, VICTREX PEEK and filled PEEK materials, PEEK HT, Vespel, PCTFE, Nylon and Acetal. Wide Temperature Range With Xtreme sealing materials, Wafer-Sphere butterfly valves are fully rated to replace costlier valves in cryogenic (-320F) to high-temperature (500F) applications. Glass Filled PTFE is very commonly used in valve seat applications. . When selecting seats, always consult the pressure/temperature and corrosion resistant charts. has a temperature rating of -20F to 400F in valve applications. Yellow +40% if not listed as standard material and indicated in literature X Super-Tek II RTFE (Reinforced Polytetrafluoroethylene) It is the most universal and economical of seat materials offered by Bray; that is, it may be used in a wider range . In certain applications, a slight leakage rate is allowable, and metal-to-metal (material-to-material) seats may be used. Soft Seated Valves The seat design features a deep pocket with a protective lip which makes the design a long lasting design.The seat assembly consists in an outer metallic seat carrier with a soft seat insert. Design Features 316/316L. ASTM A105, A350 and A182 cover body materials for small size (or high pressure) forged valves. Titanium is about 40 percent lighter than steel, making it a good alternative for high revving engines. . This seat should not be used in caustic (sodium hydroxide, potassium hydroxide, etc.) Below is a general valve seat selection guide . The above chart is for reference only, please consult Meridian for specific / additional seat and seal technical information if required. ongoing developments in polymer seat materials. RPTFE has a range of operation temperature of -100 degreeC to 200 degreeC, i guess it shoul be ok for the case of 180 degreeC and pressure rating 600#. F to 248 deg. Valve Seat Material Guide. Special alloy steel Note: The above permissible temperature values indicate the limits within which each respective material can operate, not the working temperature range for the valve body made from that material. The valve trim materials for valve plug, seat ring, cage, valve stem, guide bushing, and packing box parts. Common Forged Valve Materials ASTM Designation Description Common Service Recommendations Body/Bonnet Material Casting Comparison A105(1) Carbon Steel General service such as oil, oil vapor, gas, steam and water at temperatures -20 to 1000F (-28C to 537C).
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