S P Engineers Makarpura, VADODARA, Gujarat

Teflon-based gasket materials are able to withstand significantly more aggressive chemical environments (including highly oxidizing environments) than standard non-asbestos gasket materials. However their temperature, pressure and mechanical performance is inferior to standard non-asbestos gasket materials. Metal inserted and expanded PTFE are able to operate at higher pressures.        Mercer carries Garlock, Thermoseal and Gore-Tex brands of Teflon-based gasket materials. These materials are available in thicknesses 1/32" through 1/4". Teflon is principally used as a gasket material because of it's capability to remain unaffected by the majority of chemicals used in industry. It is also classified, in most cases, as a food grade material, making it acceptable to both medical and food production industries. There are three basic types of Teflon® gasket materials. Virgin Teflon , filled Teflon® and expanded Teflon® .       Virgin Teflon is by far the least expensive of the three varieties, and is used in most general applications. Filled Teflon is a gasket material with a virgin Teflon base to which a substance is added during manufacture to improve the sealing characteristics of Teflon® . This "filler" usually is glass or graphite particles although ceramics has sometimes been used. The resulting gasket material is strong, yet highly compressible with very good, though not universal, chemical resistance.       Expanded Teflon is virgin Teflon to which a stress resistance has been added by means of molecular rearrangement during manufacture. This process ensures that the molecular chains from which the Teflon is constructed, do not arrange themselves into set patterns. This means that expanded Teflon possesses no structural weakness (grain) and expands and contracts equally in all directions. Because no additives are required, expanded Teflon® also possesses the unique chemical resistance of virgin Teflon.

Rubber is the most cost-effective material to use where temperatures and pressures are low and the chemical environment is mild. Different elastomers offer different mechanical and chemical properties. Cloth inserted materials are better able to handle movement and high compression loads.  

The Ring Type Joint was intially developed for high pressure/temperature applications found in the petroleum industry. The main use being in the oil field on drilling and completion equipment. However, today this product range can also be found on valves and pipework assemblies, along with some high integrity pressure vessel joints.       

Thickness : 1 to 8 mm

Brand Name : S.P. Engineers

Packaging Type : Box

Shape : Round

All standard o-ring sizes (imperial and metric) are available. Custom o-rings are available in standard cross-sections (imperial and metric) to any length or ID. They will be molded or spliced using vulcanizing or adhesive depending upon application.       We can also supply encapsulated o-rings where one material is covered with a continuous layer of another material (usually Teflon® ). All standard International sizes are held in stock for immediately delivery, however, S P Eng. is also able to supply speciality O-Rings at competitive prices. Encapsulated, PTFE, Viton®, Kalrez Silicone and gas filled are just an example of typical non-standard materials we supply on a regular basis to a wide variety of valued customers.       Metallic O-Rings can also be manufactured to individual customer specifications. Please contact us with your specific enquiries and let our Sales Team assist you in solving your sealing requirements.       For materials, sizes and applications see O-Ring Materials below.       Nitrile, Silicone and Viton® are also available in closed-cell sponge for applications requiring high compressibility. Other elastomers (Butyl, EPDM, Pure Gum, etc.), PVC, Tygon and Urethane are also available. For guidelines on the performance of these materials, see Rubber/PVC Materials.

Standard Pipe Flange: We stock all popular sizes and materials for immediate shipping.          Custom Gaskets: We handle any size or shape. We fabricate these gaskets the same day, or within the hour if needed.          Encapsulated: A gasket of one material is totally enclosed in a continuous layer of another material (usually Teflon®) with no join. Usually done with O-Rings and Molded Seals.          Envelope: A gasket of one material is covered by an envelope of another material. We supply slit or milled envelopes and conventional or square form shields.          Laminated: Two or more materials are layered together to form a gasket which is often enclosed in an envelope.       

S P Eng. manufactures custom shims and spacers in any shape and size for the industrial OEM, power generation and petrochemical. Fast turnaround in any quantity.   All metals with full material traceability in thicknesses .0005" - 8": aluminum, brass, copper, carbon steel, spring steel, stainless steel, inconel, monel, nickel and titanium. Composite materials, micarta and plastics available as required.

Material : aluminum, brass, copper, carbon steel, spring steel, stainless steel, inconel, monel nickel titanium

Thickness : 40-50mm

Length : 2inch, 3inch, 4inch

Grade : BS, DIN, GB

Finishing : Polished

Feature : Fine Finished, Rust Proof

Jacketed gaskets combine the temperature resistance of a metal jacket with the sealing performance of a soft filler. The jacket and filler materials are selected to optimizes temperature and chemical performance; construction style is dictated by pressure needs, gasket geometry and sealing issues.  

Camprofile or "Grooved" Gaskets have proven themselves in all industrial applications. Camprofile gaskets are found in industrial power plants and in the primary circuits in nuclear installations. Used either between flanges or in heat exchanger units in nuclear applications. The Petrochemical and Chemical industries benefit too, as the gaskets are used in applications where high pressures and temperatures are maintained and consequently high bolt loads need to be controlled.   For flange protection the Camprofile gaskets are normally used in conjunction with a covering layer of either PTFE, Graphite etc, and provided that the layer thickness is correct in application the flange will be completely protected from the grooved profile of the gasket.       Advantages         Outstanding sealing characteristics at a wide range of seating stress levels. Helps compensate for wide swings in temperature and pressure. Very forgiving of inconsistent bolt torqueing or installation error. Applicable to almost all types of flanges regardless of bolt load available. The working thickness of sealing layers is extremely small reducing fugitive emissions. Low seating stresses required reduce flange damage and gasket removal problems. The gasket cores are reusable reducing cost and eliminating gasket disposal problems. Offers extreme temperature and chemical resistance because of the variety of materials available. Extremely high pressure are easily sealed with confidence.  

Carbon Fiber and Graphite Flake sheets are able to withstand significantly more aggressive chemical environments (other than powerful oxidizing environments) and higher pressures than standard non-asbestos gasket materials. Metal inserted materials are able to operate at even higher pressures. In reducing environments, pure graphite can handle up to 5000F.  Graphite gasketing materials are made from pure exfoliated exhibiting excellent sealing characteristics, withstanding a high range of temperatures pressures and chemicals. The homogeneous material is free of respirable fibers, binders and additives. Standard grades are 95% - 98% pure graphite sheet. Graphite is extremely conformable giving it the ability to flow into flange surface imperfections. Its low permeability and chemical resistance make it an ideal choice as a sealing material. Mercer offers a wide range of Graphite with various core materials such as tanged stainless of Foil stainless steel reinforcement.

Molded gaskets in a wide variety of sizes and cross-sections including quad rings, bullets, bee-hives and deltas are available. If a custom length is needed, gaskets can be made using a standard cross-section extrusion. The gaskets will be spliced using vulcanizing or adhesive as appropriate.        If a custom cross-section is needed, tooling can be made. The gasket will be extruded, cut to length and spliced using vulcanizing or adhesive as appropriate.      

Ceramic Fiber Gaskets are appropriate when an inexpensive heat seal is required. Only used where sealing pressures are low, it happily operates in areas where temperatures are in excess of 1472 F. It is soft and can be easily laminated to form thicker seals, hence flange finish is not particularly important when using this material. Used mainly as high temperature insulation for sensitive apparatus it has good dielectric strength and so is often used as an electrical insulation. Usually supplied with an organic binder to improve it's tensile strength.