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Shell & Tube Heat Exchanger Gasket / Double Jacketed Gasket
Shell & Tube Heat Exchanger Gasket / Double Jacketed Gasket — DXTSEALS
Product type: Shell & Tube Heat Exchanger Gaskets (Full-face rings, split rings, support rings, spacer rings)
Model / Family: HE-GS / HE-GSR / HE-SR (custom part numbers available)
Short description High‑precision metal and metal‑composite gaskets designed for shell & tube heat exchangers. Engineered to provide reliable sealing between tube sheet and shell, tolerate thermal cycling, resist corrosive process media, and simplify installation for maintenance-heavy operations.
Product overview
DXTSEALS Shell & Tube Heat Exchanger Gaskets are produced for power plants, petrochemical, refrigeration, HVAC, and industrial process equipment. They are available in solid metal, metal‑elastomer composite, and segmented split designs to suit removable tube bundles and different tube‑sheet configurations.
These gaskets are optimized for:
Positive sealing between shell and tube sheet (face seals and stepped faces)
Easy removal and re‑installation for tube bundle servicing
High temperature and pressure stability
Compatibility with a wide range of process fluids including hydrocarbons, steam, refrigerants and aqueous corrosives
Key features & benefits
Reliable sealing performance: Precision machined mating surfaces with controlled finish ensure consistent compressive sealing and low leak rates.
Multiple materials and coatings: Stainless steel (304/316/316L), duplex/super duplex, Inconel, Monel; optional PTFE, graphite, or elastomeric sealing rings.
Split / removable designs: Split rings and segmented gaskets for quick removal of tube bundles without removing the shell or disturbing adjacent piping.
Wide operating range: Options rated for cryogenic to high temperature services (−196 °C up to +650 °C depending on material).
Custom sizes: Manufactured to customer tube‑sheet hole patterns — diameters from small units up to 3000 mm and special geometries supported.
Corrosion resistance: Choice of alloys and surface treatments for corrosive environments.
Low maintenance: Durable construction reduces downtime and replacement frequency.
Typical materials & construction
Metal rings: SS304, SS316, SS316L, 2205 Duplex, 2507 Super Duplex, Inconel 625/718, Monel 400.
Sealing inserts & fillers: Flexible graphite, PTFE (virgin or filled), PTFE‑encapsulated graphite, elastomers (Viton®, EPDM) for low temperature applications.
Surface finish & treatment: Machined or lapped face; optional passivation, electro‑polish, or coating (PTFE film) on request.
Notes: Material selection depends on temperature, pressure, and chemical compatibility. Contact DXTSEALS technical team for guidance.
These are typical ranges. Final ratings depend on design, material and application conditions.
Pressure class: Vacuum up to ASME Class 600 (consult for higher pressures)
Temperature range: −196 °C to +650 °C (material dependent)
Leakage rate: Designed to meet industrial low‑leakage sealing targets; measurable leak rates depend on service and test method.
Tolerance: ID/OD per customer drawing; typical manufacturing tolerances ±0.1 mm for rings up to 500 mm, larger sizes per drawing.
Manufactured according to customer drawings and industry standards where applicable. Compatible with: ANSI, ASME, TEMA flange/tube sheet practices. Quality control to ISO 9001 systems; material certificates (EN 10204 3.1) available upon request.
Full‑face solid ring: One‑piece metal ring providing continuous contact — used where tube bundle is removable as a single unit.
Split ring (two‑piece): Allows removal without disassembling adjacent components.
Segmented gasket (multi‑piece): For very large diameters or restricted access; assembled in situ.
Support / spacer rings: Provide axial clearance, centering and mechanical support for tube bundles.
Ordering information (example): HE-GS-316L-Ø500-FS — Shell & Tube gasket, 316L, outer diameter 500 mm, full‑face.
Include full tube‑sheet drawing or the following data when requesting a quotation:
Shell inner diameter (ID) & outer diameter (OD)
Tube bundle OD and ID
Tube sheet hole pattern and bolt circle
Operating temperature & pressure
Process media & chemical compatibility
Clean the tube sheet seating surfaces of scale, debris, and corrosion.
Inspect gasket for damage before installation — do not use deformed parts.
Fit the gasket carefully aligning to bolt holes or locating dowels.
For split/segmented types, assemble per supplied assembly sequence and torque pattern.
Tighten bolts in a star pattern to recommended torque values for the flange class.
Re‑check torque after pressurization and during first operation hours.
Maintenance tips: Keep spare gaskets on hand for planned outages; replace gaskets showing visible degradation or deformation.
Oil & Gas upstream and downstream heat exchangers
Petrochemical & chemical process heat exchangers
Power generation (fossil and geothermal)
Refrigeration & cryogenics
HVAC & industrial process heat transfer equipment
Hydrocarbons (oil, diesel, gasoline): Stainless steels, Inconel, Monel with PTFE/graphite inserts
Steam: 316/316L, Inconel with graphite sealing
Aqueous acids/alkalis: Duplex/super duplex or nickel alloys recommended
Refrigerants: PTFE‑lined or elastomer insert options for low temperature sealing
Visual & dimensional inspection to drawing
Material test certificates (EN 10204 3.1 / ASTM equivalent)
Hardness & surface finish checks
Pressure testing and helium leak testing on request
Individually packed in protective film and cardboard to prevent damage
Export crates available for sea shipment
Sea‑worthy, palletized packaging for international freight
Manufacturer with in‑house machining and metallurgy expertise
Custom engineering support for complex tube‑sheet geometries
Quick sampling and production lead times
Competitive pricing and global export experience
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