Fluid Sealing Products

Chesterton 450 Synthetic Fiber Sheet is a low temperature, Non - Asbestos Gaskets material suitable for general services to 390°F (200°C). 365 psi (25 bar). 450 Synthetic Fiber Sheet is recommended for use in water, gas, brine and steam applications. 450 is not recommended for use in chlorinated hydrocarbons, aromatic and ester ketones.

Technical data – 450

• Temperature Limit: 390°F (200°C)
• Pressure Limit: 365 psi (25 bar)
• Compressibility (ASTM-F36) 15%
• Seal-ability(ASTM-F37) 0,25 ml/hr
• Creep relaxation (ASTM-F38) 20%
• Recovery (ASTM-F36) 50%
• Tensile strength across grain (ASTM-F152) 1600 psi (110 bar)
• P x T = 125,000 (°F x psi)
• P x T = 4,375 (°C x bar)
• Color: Grey

• Metal holder is support bushing in the event of shaft bending at start-up. The face is not disturbed if there is contact.
• Non-fretting design will not destroy shaft, sleeve or any metal part.
• Balanced O-ring design with anti-clog features.
• Springs out of fluid.
• Dynamic O-ring moves to a clean surface.
• Centrifugal force works to clean the seal faces and rotary element.
• Computer profiled face design
• Ability to withstand large changes in operating temperature while keeping face flat.
• Ability to operate at pressures up to 42 BAR (600 psi) because heat generation does not greatly affect seal face flatness.
• Dynamic O-ring slides on smooth, non-metallic surface to prevent fretting and hang-up.
• Metal holder is never subjected to fretting or wear.
• CHESTERTON Patented Self-Aligning : CHESTERTON 891 Rotary Seal may be run against conventional stationaries, however, as shown with CHESTERTON Self-Aligning Stationary (SAS) , stuffing box face alignment is automatic. Start -up leakage is controlled.
• All wearing parts, seal faces, O-rings, screws and springs are replaceable at low cost, making in-plant rebuilding simple and economical. Parts being replaced can be crushed and bagged for environmentally safe disposals

Chesterton Steel Trap Metal/ Graphite Gasket is manufactured with concentric, isolated convolutions in sheet stainless steel that trap pure graphite against the flange face. As the flange is tightened, the convolutions are progressively flattened, thus trapping the graphite sealing media. Not only is a highly effective seal effected against both faces of the flange, but the graphite is protected against oxidizing atmospheres and corrosives. Steel Trap gaskets can remain in place and will continue to seal effectively until removal is necessary for equipment servicing or repair.These seals pay for themselves many times over in reduced maintenance and downtime. The unique, self-locating design allows the same size gasket to be used in the vast majority of flange pressure classes. This results in unmatched time savings in locating the right gasket, while reducing inventory and virtually eliminating the chance of incorrect gasket selection.

Technical data

• Temperature Limit: –328°F (–200°C) to 932°F (500°C)
• atmosphere –328°F (–200°C) to 1200°F (650°C)
• steam –328°F (–200°C) to 1650°F (900°C)
• inert media Pressure Limit: vacuum to 6000 psi (415 bar)
• Chemical Resistance: pH 0 – 14

• Withstands temperature extremes
• Superior pressure handling
• Impervious to most chemicals
• No flange galling
• Works with all existing flanges
• Superior fugitive emissions control capability
• Specialty materials available
• Long term reliability without flange welding