GYLON® PTFE Gasketing

Gylon 3505hiGarlock GYLON® gasketing is a family of flat PTFE gasketing materials.

GYLON® high-performance PTFE gasketing is manufactured using a proprietary process that imparts unique physical properties, which are not obtainable through conventional manufacturing methods: Designed for severe chemical service, color-coded for easy identification, superior sealability, which helps reduce process and media loss as well as fugitive emissions, reduced creep and cold flow characteristics, and patented thermal bonding process to fabricate virtually any size gasket.

The innovative GYLON® gasketing process reorients the PTFE and fillers in such a way to increase the material’s tensile properties and decrease the creep relaxation problems that usually plague PTFE products. In addition, the mixing process creates a homogenous material with consistent, superior physical properties that, unlike inexpensive skived PTFE sheet materials, do not fluctuate from one side of the sheet to another.

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Gasketing - Bluegard

Style 3300hiToday’s environmental concerns demand positive seals. Garlock® gaskets provide that assurance, and perform with proven reliability.

High Pressure Sheet (HPS) Gasket Material

Compressed fiber sheet gasket material, a stalwart of the Garlock® product line, has been improved and expanded over the years. The materials have been reformulated and upgraded, and the HPS manufacturing process now uses an environmentally friendly non-VOC solvent. In addition, Garlock’s® environmental controls now include a solvent recovery system that captures emissions and recycles them into the production process. Solvent recovery is used in the production of both high pressure sheet and GYLON®.

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Pump Diaphragms

diaphragm_groupGarlock Pump Diaphragms Deliver Solutions

From pure PTFE to one-piece bolt on PTFE bonded rubber diaphragms, if you have a difficult or critical application, we have the diaphragm to meet your needs.

GYLON® PTFE Diaphragms

Exclusive to Garlock, the GYLON® PTFE Diaphragm material is a time proven product which is made using a proprietary process which optimizes quality and uniformity. Using the best available technology this material offer the longest cycle life in the industry, and continues to outperform all competitive materials.

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212-ULE (Ultra-Low Emissions)

212Valve Stem Spool Packing

Simplify your Leak Detection and Repair (LDAR) Program with Garlock Style 212-ULE
Better than engineered set performance in a convenient spool product. Style 212-ULE is easy to cut and install with color coded braid. Cut inventory dollars and reduce outage schedules without sacrificing performance. Outage planning is easier than ever now that each 212-ULE box indicates how many typical valves can be repacked by one box.

Value & Benefits:

  • Easily meets less than 100 ppm emissions
  • Easy to use dispensing box
  • Pack stuffing boxes without ordering specialized seal sets
  • Low stem friction
  • Environmentally friendly performance and packaging
  • Our proprietary “212” ULE drastically reduces emissions in valve applications
  • A planning label that tells you how many boxes you need so you can plan outages better
  • A 5-year warranty
  • Recyclable packaging for a truly green solution
  • Unique design that allows you to make your own packing set rather than depend on a distant manufacturing site.

Ideal For:

  • Valves
  • Critical Service
  • EPA Compliance
  • Hydrocarbon Processing Industry
  • Chemical Processing Industry


Min. Temperature: -328 (°F)
Max. Temperature: +1200 (°F)
In Steam Min. Temp. -200 (°C)
In Steam Max. Temp +650 (˚C)
Atmosphere +850˚F (+455˚C)
Pressure: 4500 psi (310 bar)
PH 0 – 14 (except strong oxidizers)

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Expansion Joints

206Garlock Rubber Expansion Joints offer superior performance, reliability, and service life.  

Expansion joints are  specially engineered products inserted in a rigid piping system to achieve one or more of the following:

  • Absorb movement
  • Improved thermal stability
  • Relieve system strain due to thermal change, load stress, pumping surges, wear or settling
  • Reduce mechanical noise
  • Compensate for misalignment
  • Eliminate electrolysis between dissimilar metals

At Garlock, the range of our engineering emphasis extends from the selection of the fabric used for reinforcement to the choice of materials used in actual expansion joint construction. Rigid laboratory and field tests of Garlock expansion joints are what back up our assurances of long life and reliable service.

An important word on safety: all Garlock expansion joints carry safety ratings exceeding product specifications in such areas as pressure and movement. Garlock nonmetallic expansion joints and flexible couplings are ideally suited for hundreds of applications in a wide range of industries, including:

  • Power Generation
  • Pulp and Paper
  • Chemical Processing
  • Water/Waste Water
  • Marine
  • Mining
  • Heating, Ventilating, and Air Conditioning

Garlock Expansion Joints offer superior performance, reliability, and service life. This in turn improves plant safety, increases the mechanical integrity of equipment, and allows customers to gain a competitive advantage in the marketplace.

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Butterfly Valves

Butterfly valvesTrusted throughout the chemical, petrochemical, and many other industries

Garlock Butterfly Valves are renowned throughout the chemical, petrochemical, process, and many other industrial sectors for their quality, performance, and reliability in arduous conditions. Garlock valves set the standard in TA-Luft compliance, plus the valves are certified with S1L 3 according to EN 61508.

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Group_2Klozure® Bearing Isolators for the chemical, pulp and paper, hydrocarbon processing, power generation and many other industries

Klozure® Bearing isolators Feature labyrinth design to prevent ingress of contaminants. Key products include MICRO-TEC® II and GUARDIAN®, both of which employ a patented cam lock design and engineered unitizing ring. These and other Klozure® bearing isolators are used extensively in the chemical, pulp and paper, hydrocarbon processing, power generation and many other industries.

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Navy and Coast Guard

EJGarlock Expansion Joints Manufactured to meet Navy, Coast Guard and American Bureau of Shipping Requirements

Garlock® manufactures numerous expansion joints in accordance with U.S. Navy specifications.


Style 9278 EZ-FLO® is designed to meet the requirements of ASTM F1123, and is constructed of neoprene and polyamide. Retaining rings must be galvanized in accordance with the specification. Hydrostatic testing may be required and is performed inhouse at our Palmyra, New York, facility.

Style 7250 FLEXO-MATIC® is designed to absorb noise and vibration in air-conditioning, heating, and industrial piping systems.

Style 7706 S-type has been developed specifically for submarine service. Other styles are available per application. Consult the factory for specific designs.

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EZ-FLO® Style 206 Rubber Expansion Joints

206EZ-FLO® expansion joints contain a single wide flowing arch, eliminating the need for filled arches on slurry services. Garlock EZ-FLO® expansion joints have successfully served all major industries, including pulp and paper, steel, waste and water, HVAC, power generation, chemical, petrochemical and marine.


  • Self-flushing design eliminates media buildup and reduces fluid turbulence
  • High pressure and vacuum-resistance ensures longer life and reduces inventory requirements
  • Lightweight design installs easily, costs less to ship


  • Tube- Standard chlorobutyl liner extends to outer edge of the flange for excellent chemical resistance- Flowing arch design adds pressure resistance and reduces product buildup
  • Body- Rubber impregnated tire cord and polyester cross-wrapped in bias-ply construction
  • Cover- Homogeneous layer of chlorobutyl elastomer extends to the outside edge of the flange- Coated with a weather-resistant protectant
  • Custom Drilling- ANSI, DIN, AWWA, BS, JIS, and special drilling patterns available on request

Optional Configurations:

  • Extended Face-to-Face
  • Offsets, lateral, angular, and torsional
  • Custom drilling: ANSI, DIN, AWWA, BS, JIS, and special drilling patters available on request

Special Liner* and Cover Materials:

  • Neoprene
  • EPDM
  • Hypalon**
  • Nitrile
  • Natural (tube only)
  • FDA tubes of EPDM, neoprene and natural


Min. Temperature: -20°F (-29°C)
Max. Temperature: 300°F (150°C)
Max. Pressure: 250psi (17bar)
Max. Inner Diameter: 120in. (3000mm)
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Download Garlock Expansion Joint Style 206 EZ-FLO Datasheet (pdf)

PTFE & FEP Design / Chemical Applications

G200 HPPTFE & FEP Expansion Joints for Chemical Applications

All Garlock® expansion joint styles have been rigorously lab and field-tested, and engineered to ensure long life and reliable service. Garlock® PTFE and FEP expansion joints and couplings have pressure ratings high enough to handle most applications. These PTFE concentric spool-type flexible couplings are designed to reduce noise and compensate for expansion, contraction and minor piping misalignment in chemical processing, air conditioning and heating systems. All PTFE expansion joints and couplings are furnished with ductile iron flanges and control units ready for immediate installation on the job site. As the pope size gets larger, Garlock® increase the bellows thickness and the strength of the reinforcing rings to compensate for the change in internal forces. This permits the same high pressure rating for all sizes.

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GPT - Garlock Pipe Technology - VCXT


The GPT VCXT™ flange insulating kit is comprised of an insulating gasket, insulating sleeves, insulating washers and metal backing washers. The insulating gasket is constructed from a machined metal core utilizing a serrated profile. The metal core is faced with THERMa-PUR™, a proprietary high temperature sealing material that out performs vermiculite. Correct gasket location is ensured by the use of a Garlock 5500 spacer ring, located around the periphery of the serrated metal core.

GPT™ high temperature flange insulation sets are specifically designed to create a seal and maintain electrical isolation across a wide range of seating stresses and flange classes in elevated temperature service. They can be utilized in load compromised connections; such as damaged and/or lined flanges and also heavily bolted connections where significant gasket stresses may be generated. In addition the relatively high compression characteristics of the facing material ensure both seal and isolation performance can be achieved over a wide range of flange surface finishes. The use of THERMa-PUR™ as the sealing material pushes the performance of the GPT VCXT™ insulation kit beyond the temperature capability of traditional insulation sets based on vermiculite or glass/epoxy sealing technology. THERMa-PUR™ is designated as fire safe, complying with the requirements of the oil and gas industry recognized API 607 and API 6FB fire tests.
Operational pressure range:
Full vacuum to ASME B16.5 1500lb
-328°F – 770°F (-200°C to 410°C) Operational temperature range:

THERMa-PUR™ is suitable for sealing across a wide range of chemicals (pH 0-14) and sweet and sour gaseous and liquid hydrocarbons. Standard core and washer metallurgy are NACE (MRO175) compliant.
The insulating gasket and washers have been designed and developed for use in standard pipeline flanges where both cathodic protection and high integrity sealing are required at elevated service temperatures. For non-standard bolted connections please consult your regional Garlock sales manager.

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