Document DMw3wDwB5mE5y9eg6yqQjEL3Q
US VERSION
Family of Gaskets
For over 130 years, Pfaudler is the leader in developing new technologies to meet the highly specific chemical processing needs of its clients. One reason why our glass-lined equipment is trusted by over 90% of the world's top chemical companies is the sheer reliability of our reaction technologies and comprehensiveness of our glasslined accessories. These technologies are critical to the safe containment of corrosive contents, maintaining the vessel pressure and ensuring the final batch quality. In short, our glass-lined technologies are absolutely integral to an effective process.
PRODUCTS & EQUIPMENT
Glass Lined Reactors Glass Lined Mixing Systems Baffling Technoliges Storage Tanks & Receivers Glass Lined Columns Accessories Glass Lined Instrumentation Glass Lined Heat & Mass Transfer
All Gaskets Are Not Created Equal
Prove it to yourself - see if your current stock gaskets pass the standard Pfaudler gasket quality check:
Is the envelope made from 100% virgin PTFE or TFM, a modified PTFE material (for Bull Nose gaskets)?
Is the envelope pinhole-free and electrically tested at 10,000 volts several times during manufacture?
Is the metal insert made of non-corrosive stainless steel? Are the convolutions in the metal inserts of your gaskets of the correct depth and number? (Remember - variations significantly affect sealability).
Is the compressible insert made from high-density Kevlar or flexible graphite?
Has it been successfully tested to ASTM F363 (Test Method for Corrosion Testing of Gaskets) for 1000 hours?
Have your gaskets been tested for sealability using ASTM F112 (Standard Test Method for Sealability of Envelope Gaskets) and found to meet your specific sealing requirements?
Do your gaskets conform to ASTM F336 (Practice for Design and Construction of Non-Metallic Envelope Gaskets for Corrosive Service)?
Has your gasket been tested to ASTM F434 (Blowout Testing of Pre-Formed Gaskets)?
Does your gasket supplier have the capability of customizing your gaskets for special applications and still maintain the integrity of all of the above points?
If you cannot answer "YES" to all of the above questions, your vessels are headed for trouble. Studies have shown that the use of sub-standard gasketing methods has resulted in an extraordinarily high nozzle failure rate. Only Pfaudler gaskets meet all of the stringent requirements set forth above. Pfaudler customers spend a great deal of time and money specifying and purchasing a quality vessel.
Here's the real cost of an inexpensive gasket
The failed vessel pictured here is an actual example of the typical damage caused by poor quality replacement gaskets. The unsuspecting vessel owner saved a few dollars on the gasket purchase price, but ended up paying thousands of dollars in resulting repair charges, not including downtime!
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All Gaskets Are Not Created Equal
No one should jeopardize the success of their operations by using anything less than the best gaskets available. Since Pfaudler was instrumental in developing the CR gasket, you can be sure that we make them best. In fact, Pfaudler is so confident of the superior quality of our gaskets, their exclusive use is a requirement of our equipment warranty.
Pfaudler Gaskets mean more value for your money.
The widest variety of competitively priced enveloped gaskets, with the highest performance characteristics, particularly for glass-lined steel equipment anywhere in the world.
A huge inventory of standard gaskets ready for immediate shipment.
Product labeling which provides size, type, part number, installation torque, number to call to order a replacement, etc.
Manufacturing capability and versatility that allows us to make special, custom gaskets you cannot find anywhere else to suit your very specific needs.
Air freight shipment anywhere in the world to satisfy any emergency.
Decades of experience in designing and manufacturing gaskets ensures that you get the best support before and after you purchase your Pfaudler gasket.
The quality by which the rest of the industry benchmarks. Skilled craftsmen make Pfaudler gaskets from the best materials.
Extensive testing, both in the laboratory and under the most extreme field conditions.
The support of dedicated engineers who constantly seek to improve our products and ensure they have the features and benefits necessary to meet every changing condition.
Pfaudler BN (Bull Nose) Gasket
TFM Envelope Pfaudler 2000Lr compressible insert SS Corrugated insert Pfaudler 2000 LR compressible insert
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Pfaudler NS (Normal Service) Gasket
PTFE Envelope Pfaudler 2000Lr compressible insert SS Corrugated insert Pfaudler 2000 LR compressible insert
Pfaudler Family of Gaskets
Gasket Compressible Insert Materials
Pfaudler's 2000Lr.
Pfaudler's 2000Lr is a proprietary, high density, Kevlar based material with a liquid resistant feature to improve service life, particularly in damp conditions where the insert material of a gasket might absorb moisture or where a vessel may be washed down. It contains a proprietary fiber / filler / binder system, including aramid fiber and inorganic fillers. 2000Lr has the ability to withstand high flange loads, and maximum operating temperatures, without sacrificing the product's performance characteristics. Pfaudler's 2000Lr is offered in a variety of enveloped gasket designs.
Kevlar is a registered trademark of DuPont.
Temperature: -320F to 350F prolonged service. Intermittent service is possible to 450F.
Flexible Graphite.
Physical and chemical characteristics of flexible graphite such as high compressibility, minimal creep relaxation, good temperature resistance over extended periods of time, and excellent sealability and corrosion resistance, have made flexible graphite the material of choice for a variety of special services. It may have some limitations if exposed to a highly oxidizing atmosphere. However, flexible graphite has outstanding thermal shock properties and exhibits no embrittlement characteristics. Pfaudler offers this material in a variety of enveloped gasket designs. It is available in composite form with metal, glass fiber cloth, or polyester reinforcement.
Temperature: -400F to 550F prolonged service (Consult Pfaudler or GPS for temperatures above 550F).
Technical Data on Pfaudler 2000Lr CD Tensile Density Compressibility, % @ 34.5 MPa or 5000 psi Recovery Operating Temperature Range Water absorption, after 24 hours
4.80MPa 700 psi 0.60 gm/cc 37.5 lb/cu ft 35-45
20% min. -200 to +230C -320 to +450F
20% max
Technical Data on Flexible Graphite CD Tensile Density Compressibility
4.4MPa 650 psi 1.1 gm/cc 70 lb/cu ft
40%
Recovery Operating Temperature Range Water absorption, % after 24 hours
20% -200 to +455C -400 to +850F
0 max
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Pfaudler Family of Gaskets
Bull Nose (BN) Pg. 7
Pharmaceutical Service (RX / DE-BN) Pg. 8
Normal Service (NS) Pg. 9
General Purpose
Pharmaceutical Service
Permeant Service
Excellent
Good
Excellent *
Good
Excellent
Adequate
Good
Adequate
Adequate
Electro-Static (AS) Pg. 10
Good
Good
Adequate
Self-Centering (SC) Pg. 11
Good
Adequate
Permeant / Extreme Service (PS / ES-BN) Pg. 12
Good
Good
Spacer Gasket (SG) Pg. 13
Good
Good
* With graphite insert replacing 2000Lr insert
Adequate Good Good
Piping Service
Electro-Static Service
High Temp. Service
Excellent
N/A
Excellent *
Good
N/A
Adequate
Good
N/A
Adequate
Good
Adequate
Adequate
Good
N/A
Adequate
Good
N/A
Excellent
Good
N/A
Adequate
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ACID CONCENTRATION H2SO4 | HNO3 MIXING REACTION ENGINEERING
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Bull Nose (BN)
Description:
The Pfaudler BN gasket is the premium generalpurpose gasket provided with new Pfaudler RS and RT series of Glasteel reactors. Also, when used with an optional graphite insert, this gasket can replace the Extreme Service and Permeant Service gasket.
Features:
The BN gasket envelope is constructed from TFM, a modified PTFE material.
The standard compressible insert is made of Pfaudler's 2000Lr.
A flexible graphite insert can be provided as an option. This enables the gasket to be used in services where chemicals such as bromine, chlorine and iodine are present. The graphite insert would also allow the gasket to be used at elevated temperatures up to 500F over prolonged periods of time with enhanced sealability.
Benefits:
The TFM material has a denser molecular structure with fewer voids resulting in lower permeability rate.
TFM material testing revealed lower deformation under load (cold flow) and increased sealability in comparison to PTFE material.
The TFM material has better resilience, particularly at elevated temperature.
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Excellent non-stick properties. Superior dielectric properties. Unique Pfaudler convex geometry
reduces product build-up.
Available Sizes:
The BN gasket is available in sizes from 1" to 48". (Custom gaskets and gaskets larger than 48" are available upon request).
Service Conditions:
Temperature range: -320 to 450F (Intermittent service above 350F recommended.) Prolonged service above 450F is possible with a graphite insert. Please consult Pfaudler or GPS.
Caution:
Glass-lined steel process equipment is generally limited, under specific conditions, to -20F to 450F. See equipment nameplate or consult original manufacturer if in doubt.
Pressure range (inches): 1 - 10 : Full Vacuum to 750 psig 11 - 36 : Full Vacuum to 500 psig > 36 : Full Vacuum to 300 psig
pH range: 1 to 14
Pharmaceutical Service (RX/DE-BN)
Normal Service (NS)
Description:
The Pfaudler RX/DE-BN gasket is designed specifically for use on Pfaudler's Rx series of glass-lined stainless steel pharmaceutical reactors and other glass steel equipment requiring ultra-high purity. It minimizes the potential for product build-up and cross contamination.
Features:
The inner envelope has a machined TFM bull-nose inner surface to improve minimize an edge where product can accumulate and facilitates clean-out.
The outer envelope is a PTFE NS-style envelope that protects the outside of the gasket from corrosion and contamination
The compressible insert in the RX/DE-BN gasket is made of Pfaudler's 2000LR and is completely ,,encapsulated" so fibers are not exposed.
Benefits:
The RX/DE-BN gasket is the cleanest envelope gasket available for glass-lined steel equipment. There are no exposed surfaces on either the inside or outside of the gasket to minimize product build-up and minimize the risk of product contamination.
Available Sizes:
The RX/DE-BN gasket is available in sizes from 2" to 48". Sizes larger than 48" are available upon request.
Service Conditions:
Temperature range: -320 to 450F. (Intermittent service above 350F recommended).
Pressure range (inches): 2 - 10 : Full Vacuum to 750 psig 11 - 36 : Full Vacuum to 500 psig > 36 : Full Vacuum to 300 psig
pH range: 1 to 14
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Description:
The Pfaudler NS gasket is a general-purpose gasket provided with new Pfaudler RA-series Glasteel reactors. The NS gasket is used where PTFE is compatible with the product and process operating conditions.
Features:
The NS gasket features Pfaudler's 2000Lr compressible inserts. It has a slit or tape PTFE envelope and the corrugated metal insert is made of 304 stainless steel.
Benefits:
The NS gasket is an affordable alternative to the BN gasket.
The NS gasket is available in large custom sizes.
Available Sizes:
The NS gasket is available in sizes from 1" to 66" and with custom dimensions as large as 96".
Service Conditions:
Temperature range: -320 to 450F. (Intermittent service above 350F recommended.).
Pressure range (inches): 1 - 10 : Full Vacuum to 750 psig 11 - 36 : Full Vacuum to 500 psig > 36 : Full Vacuum to 300 psig
pH range: 1 to 14
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Electro-Static (AS)
Self-centering (SC)
Description:
The Pfaudler AS gasket is used in piping systems or on vessels to help reduce the build-up of static electricity caused by friction between immiscible and free falling liquids.
Features:
The AS gasket has conductive, flexible graphite, compressible inserts, and a conductive PTFE channel envelope.
A metal grounding tab on the metal insert provides a dissipation path for electrostatic charge.
Benefits:
Using an AS gasket in conjunction with the measures listed in Technical Data Sheet TDS-98-100 helps reduce the ignition hazard of flammable solvents. Pinhole damage to the vessel glass lining due to electrostatic discharge and product build-up is also reduced.
Sealability at elevated temperatures and corrosion resistance of the compressible inserts are also enhanced.
Available Sizes:
The AS gasket is available in sizes from 1-1/2" to 48".
Service Conditions:
Temperature range: -400 to 650F. (Prolonged service above 450F possible; for temperatures above 550F please consult Pfaudler or GPS.).
Caution:
Glass-lined steel process equipment is generally limited, under specific conditions, to -20F to 450F. See equipment nameplate or consult original manufacturer if in doubt.
Pressure range (inches): 1-1/2 - 10 : Full Vacuum to 750 psig
11 - 36 : Full Vacuum to 500 psig > 36 : Full Vacuum to 300 psig
pH range: 1 to 14
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Description:
The Pfaudler SC gasket is designed for ease of installation in piping systems, or on vessels where centering of the gasket is critical. It is a general-purpose gasket and is essentially a self-centering version of the standard NS design.
Features:
The SC gasket includes an oversized compressible insert made of Pfaudler's 2000Lr.
The outside diameter closely matches the inside diameter of the flange bolt circle.
Benefits:
This design ensures the SC gasket is positioned to enhance sealability and reduce leaks at start-up.
Correctly centered, the SC gasket also reduces any potential hazard from corrosive chemicals leaking from overhead piping.
Easy installation.
Available Sizes:
The SC gasket is available in sizes from 1" to 18".
Service Conditions:
Temperature range: -320 to 450F. (Intermittent service above 350F recommended).
Pressure range (inches): 1 - 10 : Full Vacuum to 750 psig 11 - 36 : Full Vacuum to 500 psig > 36 : Full Vacuum to 300 psig
pH range: 1 to 14
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Permeant/Extreme Service (PS/ES-BN)
Spacer Gasket (SG)
Description:
The Pfaudler PS/ES-BN gasket is designed for services where chemical such as bromine, chlorine and iodine are present. The combination of the bull-nose TFM envelope and flexible graphite insert are ideal for severe applications involving operation at elevated temperatures over long periods of time.
Features:
The PS/ES-BN gasket has a machined TFM, bull nose envelope providing a thicker envelope on the process side of the gasket to reduce the effects of chemical permeation.
Unique bull-nose geometry minimizes product build-up.
The compressible insert is made of flexible graphite.
Benefits:
The PS / ES BN gasket provides a longer service life and has added protection against the detrimental effects of chemical permiation.
The PS / ES BN gasket is suitable for higher process temperatures over a longer time.
The PS / ES BN gasket minimizes product build-up.
The flexible graphite insert provides increased corrosion resistance.
Available Sizes:
The PS/ES-BN gasket is available in sizes from 1" to 48". Custom gaskets larger 48" are available upon request.
Service Conditions:
Temperature range: -400 to 650F. (Prolonged service above 450F possible; for temperatures above 550F please consult Pfaudler or GPS).
Caution:
Glass-lined steel process equipment is generally limited, under specific conditions, to -20F to 450F. See equipment nameplate or consult original manufacturer if in doubt.
Pressure range (inches): 1 - 10 : Full Vacuum to 750 psig 11 - 36 : Full Vacuum to 500 psig > 36 : Full Vacuum to 300 psig
pH range: 1 to 14
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Description:
Pfaudler SG gasket is used to fill small gaps in piping systems which result from the build-up of tolerances over the length of the pipe run.
Features:
The SG gasket has a machined PTFE channel envelope, and has inserts made of Pfaudler 2000LR. The thickness of the compressible inserts is double that of a standard envelope gasket.
Benefits:
The SG gasket can compensate for inaccurate spool lengths in piping systems.
Easy installation. Has an enhanced service life due to reduced
moisture absorption.
Available Sizes:
The SG gasket is available in sizes from 11/2" to 18" nominal diameter.
Service Conditions:
Temperature range: -320 to +450F (Intermittent service above 350F recommended).
Pressure range (inches): 1-1/2 - 10 : Full Vacuum to 550 psig
11 - 18 : Full Vacuum to 300 psig
pH range: 1 to 14
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Custom Gaskets
All you need to service your specialized requirements
Pfaudler has all you need to service your specialized requirements. We have qualified engineers, skilled craftsmen, and the equipment to manufacture almost any custom gasket for glassedsteel equipment. Pfaudler offers a wide variety of materials of construction for the compressible insert, envelope, and metal insert.
If you have a specialized need, call us. We will be glad to design a gasket especially for you. Our experts will work with you on projects others probably wouldn`t attempt. Put Pfaudler`s years of experience and proven track record to work for you.
Quality, Availability and Reliability
Highest quality gaskets available for glass lined equipment - 100% virgin PTFE envelopes - Corrosion resistant stainless steel insert - High density, liquid resistant compressible insert
Standard gaskets stocked for same day shipment
Available individually or in cost saving multi packs
Custom gaskets available for specific applications
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Features
For variable functionality
Options
A variety of baffles available Dip tubes with fluoropolymer-lined and
glass-lined options EZ-port handhole Insulation and stainless steel sheathing Pfiber lights or Hi-lights Glass-lined pipe and fittings A variety of exterior coatings
Instrumentation
PH probes Temperature sensors GlasSentinel Quatro-pipe baffle available with temperature
measurement and sampling capabilities
Valves
Outlet valves with manual hand wheel or air-actuator
Optional low profile air actuator available for limited space requirements
Optional EZ-valve adapter available for quick installation and removal
Valve bodies are available with side flush port providing access for sampling, cleaning, and purging without dismantling the entire valve.
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Service
Pfaudler offers complete installation and start-up services to assure trouble free start-up and efficient equipment performance. Pfaudler provides 24/7 assistance to ensure long-term reliable operation of your Pfaudler equipment. Technicians are direct employees with OSHA training and certifications. Installation - preinstallation service Start-up assistance Training of personnel Field erection service Inspection Field repairs ASME welding
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GMM Pfaudler is a global leader in corrosion-resistant technologies, systems, and services for the chemical, pharmaceutical, food and energy industry.
Our Branded Product Lines that include PFAUDLER, NORMAG, MAVAG, MIXEL, MIXION, INTERSEAL, EQUILLOY, EDLON and HYDROAIR showcase our strength as a group, our capabilities, and our pursuit for constant innovation. With an end-to-end solutions-oriented approach, a global footprint, and a perfectly integrated offering system we are able to meet complex industry demands worldwide.
GMM Pfaudler is driven by 1800+ individuals across 4 continents and 16 global manufacturing facilities around the world. The Group's targeted investments in strategic markets, innovation and competitiveness paves the way forward for GMM Pfaudler's continued legacy.
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www.gmmpfaudler.com 5US - 8E | 06/2023
