PEEK Valve Seat

Description

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PEEK tube pipe is highly resistant to thermal degradation and attack by both organic and aqueous media. It resists creep and retains dimensional stability at high temperatures and pressures, making it ideal for use in seal backup.

 

Our PEEK sealing materials for rotary, reciprocating, and static applications are formulated to provide optimal performance and service life in your designs. Our offering ranges from virgin PEEK to precision blends that leverage the additive properties of carbon fiber, glass fiber, PTFE, and other fillers to meet specific temperature pressure, speed, and wear requirements.

 

SNC Plastic offer extruded PEEK round bar/rod and tube stock, and also a wide range of moulded PEEK tube pipe in sizes up to mm+ in diameter.

We also can produce finished PEEK parts according to your requirements. Such as valve seat insert, seat ring for Trunnion Mounted Ball Valve, Slab Gate Valve, Expanding gate valve, Floating Ball valve&#;

 

The Basics of Ball Valve Seat and Seat Insert Materials

Ball valves play a critical role in controlling the flow of fluid and pressure within a pipeline, but their effectiveness and safety is only as good as the seat insert material used.

 

Ball Valves

Whether found in a petrochemical application where a leak could be environmentally devastating, or in a pharmaceutical laboratory where cleanliness and sanitation are critical, ball valve seats must be reliable and robust. A ball valve consists of the body of the valve, the body cap, the stem, the hollow ball, and the round ball valve seat.

The ball valve seat is responsible for sealing the fluid inside and uniformly distributing the seating stress. In soft seat ball valve designs, either an elastomer or polymer is used as the seal and are inserted into a metallic seat ring. This approach, as opposed to hard seat ball valves, is popular because it provides good sealing action, is lighter weight, and more cost effective.

PEEK Seals are among the most robust polymer seals available. PEEK exhibits extremely high tensile properties and low deformation under load. As a result, PEEK machined seals are very stable over an extended period of time, even in environments where pressure, temperatures, and chemicals place loads on the material

 

VALVE SEAT and seat insert MATERIAL SELECTION

SNC Plastic provide most suitable valve seat material solutions to your application.

Material Main Properties Notes/Applications Temperature Range Virgin Natural PEEK Excellent chemical resistance and mechanical properties at elevated temperatures. Unreinforced PEEK is a general purpose material noted for its high elongation and toughness. valve seats, seat inserts, back-up rings, sealings -40&#; to 260&#; Carbon fiber filled PEEK Offers increased strength, stiffness, and stability at high temperatures. Good wear resistance and thermal conductivity. Bearings, bushings, seals, thrust washers, valve plates -40&#; to 260&#; Glass fiber filled PEEK Gives designers the benefit of excellent compression strength and stiffness and reduced expansion rates. Excellent chemical resistance Suitable for use in parts which are exposed to high static loads over long periods in high temperature conditions. -40&#; to 260&#; Bearing Grage PEEK Excellent combination of low friction, low wear, high limiting PV, low mating part wear, and easy machining Bearings, bushings, pump wear rings, seals, Thrust washers&#; -40&#; to 260&#; PTFE filled PEEK Higher lubricity than Virgin PEEK. It also has a low tendency to abrade counter surfaces, even when parts are subjected to temperatures between 100°C and 260°C. Suited to sealing applications where start-stop or rotary motions are involved at higher RPMs -40&#; to 260&#;

 

PolyEtherEtherKetone (PEEK)

Maintains wear resistance and mechanical strength up to 260&#; continuous use.

PEEK is the performance material of choice for aggressive environments such as high temperatures, wet processes, and heavy loads. It combines exceptional wear, chemical and moisture resistance with very high strength, dimensional stability and stiffness. PEEK can be continuously exposed to hot water or steam with no distortion, corrosion or galling.

Unreinforced PEEK is a general purpose material noted for its high elongation and toughness. Glass fiber-reinforced PEEK offers increased strength, stiffness and stability at high temperatures, while carbon fiber-reinforced PEEK gives designers the benefit of excellent compression strength and stiffness and reduced expansion rates. PEEK is easily machined to precise tolerances.

 

Properties

• Superior wear resistance and dimensional stability to 260&#; continuous use
• Excellent resistance to chemicals, steam and hydrolysis
• Very low moisture absorption
• Very high thermal stability (V-O UL 94 rating)
• Superb flexural and torsional strength
• Abrasion resistant
• Good dielectric properties
• Good resistance to radiation
• Self-extinguishing

Applications

Want more information on surface safety valve(s) (ssvs)? Feel free to contact us.

• Sliding and wear parts
• Food contact parts
• Gears
• Valve seats
• Pump wear parts
• Structural parts
• Appliance parts
• Bushings, bearings, seals and rings
• Plug connectors
• Wafer carriers

Industries

• Chemical technology
• Mechanical engineering
• Energy industry
• Electronics
• Food technology
• Oil and gas industry
• Aircraft and aerospace technology
• Automotive industry
• Semiconductor technology
• Vacuum technology

Material Data Sheet

PEEK (polyetheretherketone) is a high-performance engineering plastic with outstanding resistance to harsh chemicals, and excellent mechanical strength and dimensional stability.

Item Test Standard or Instrument Unit PEEK-N PEEK-GF30 PEEK-CF30 PEEK-HPV Physical Properties Color &#; Natural or Black Natural or Black Black Black Density ISO -1 g/cm3 1.3±0.01 1.5±0.01 1.4±0.01 1.43±0.01 Water Abs. (25&#;.24Hrs) ISO 62 % 0.5 0.11 0.06 0.06 Mould shrinking percentage 3mm,170&#;, Flow direction % 1.2 0.4 0.1 0.3 Perpendicular to flow direction % 1.5 0.8 0.5 0.5 Thermal Properties Melting point ISO &#; 343 343 343 343 Distortion temperature ISO 75-1/-2 &#; 163 315 315 293 Continuous using temperature UL &#; 260 260 260 260 Glass transition temperature ISO &#; 143 &#; &#; &#; Machanical Properties Tensile strength(23&#;) ISO527-2/1B/50 Mpa 100 155 220 134 Tensile elongation(23&#;) ISO527-2/1B/50 % 34 2 1.8 2.2 Bending strength(23&#;) ISO 178 Mpa 163 212 298 186 Compressive strength(23&#;) ISO 604 Mpa 118 215 240 150 Lzod impact strength( no gap) ISO 180/U KJm-2 No crack 51 46 32 Rockwell hardness ISO -2 99 103 107 102 Friction coefficient &#; μ 0.30-0.38 0.38-0.46 0.28 0.18 Electrical Properties Dielectric strength IEC -1 KV/mm 18 19 Dielectric constant IEC 3.2 3.3  Surface resistivity IEC Ω Ω Ω 3×106Ω 5×106Ω Miscellaneous Data Flammable level UL 94 V-0@mm 1.5 1.5 1.5 0.75 NOTE: *The data stated above are typical values intended for reference and comparison purposes only. *The data should not be used as a basis for design specifications or quality control. *The information is provided as a guide to the best of our knowledge and given without obligation or liability. *Testing under individual application circumstances is recommended. * PEEK-N, Natural (Unfilled) PEEK * PEEK-GF30, 30% Glass Filled PEEK * PEEK-CF30, 30% Carbon Filled PEEK * PEEK-HPV,  10% Carbon + 10% Graphite + 10% PTFE filled PEEK

Introduction: 

PEEK (Polyetheretherketone) is a remarkable high-performance polymer that originated from ICI in and later developed by renowned companies like DuPont, BASF, Mitsui Optoelectronic Co., LTD., VICTREX, and Eltep. Its exceptional properties have made it a sought-after material, especially in the realm of valve seats, revolutionizing valve technology in various industries.

1, Exceptional High Temperature Resistance: PEEK possesses an impressive melting point of 334&#; and a glass transition temperature of 143&#;, allowing it to withstand extreme temperatures. This characteristic makes PEEK valve seats ideal for applications that demand continuous operation under high-temperature and high-pressure conditions, such as in nuclear valves, pump compressor valve plates, and sealing parts within valves.

2, Superior Mechanical Properties: The inherent toughness and rigidity of PEEK, akin to alloy materials, render it highly durable and resistant to fatigue even under alternating stress. This mechanical strength ensures prolonged performance and longevity in demanding valve applications.

3, Flame Retardant for Enhanced Safety: PEEK has excellent flame retardancy, as it meets the V-0 classification according to UL94 standards. This property ensures that PEEK valve seats can self-extinguish after ignition, providing an added layer of safety, especially in critical settings where fire hazards are a concern.

4, Dimensional Stability and Accuracy: PEEK exhibits superior dimensional stability, making it less susceptible to changes caused by environmental factors like temperature and humidity. This dimensional accuracy is crucial in high-precision applications, ensuring a reliable and consistent performance over time.

5, Chemical and Corrosion Resistance: The exceptional chemical resistance of PEEK allows it to excel in corrosive environments, making it suitable for use with a wide range of media and fluids. This characteristic further enhances the reliability and longevity of PEEK valve seats in critical industries such as oil and gas, where harsh chemical environments are common.

6, Versatility in Challenging Environments: PEEK valve seats find extensive applications in industries like aerospace, automotive manufacturing, electronics, medical, and food processing. Its ability to maintain excellent performance even under poor working conditions, high humidity, and extreme temperatures, makes it a preferred choice in diverse settings.

7, Environmental Friendliness and Non-Toxicity: PEEK is non-toxic, chemically inert, and exhibits low water absorption, making it a safe and eco-friendly material for various applications. Its biocompatibility also makes it suitable for medical and food processing industries.

PEEK valve seats have revolutionized valve technology by capitalizing on the exceptional properties of this high-performance polymer material. With its unique combination of high temperature resistance, mechanical strength, flame retardancy, and dimensional stability, PEEK is now a key player in ensuring reliable and efficient operations of valves in critical industries. As research and development continue to advance, PEEK's advantages are poised to shape the future of valve technology, unlocking new possibilities for enhanced performance and safety in industrial engineering.

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