Industrial Gasket Manufacturing Services in India | PrecisionSeal Industries

Spiral wound gaskets are the most widely specified sealing solution in oil & gas, refinery, and petrochemical piping. At PrecisionSeal Industries, we manufacture spiral wound gaskets to ASME B16.20 and API 601 standards using a precision winding process that ensures consistent seating stress and leak-free performance across thousands of pressure cycles.

Our spiral wound gaskets are available in multiple configurations: with inner ring and outer ring (IR+OR), with outer ring only (OR), or without rings for specific flange designs. We offer a comprehensive range of metallic winding materials — 304SS, 316SS, Inconel 625, Hastelloy C-276, and carbon steel — combined with filler materials including flexible graphite, PTFE, ceramic, and mica. The combination is selected based on your exact operating temperature, pressure, and process fluid.

These gaskets are the sealing solution of choice for heat exchangers, pressure vessels, high-pressure flanges, petrochemical piping, and refineries because they maintain their sealing integrity under thermal cycling and variable pressure conditions that cause non-metallic gaskets to creep and fail.

Ring joint gaskets — also known as RTJ (Ring Type Joint) gaskets — are solid metallic gaskets used in high-pressure oil and gas applications where non-metallic seals cannot reliably contain operating pressures. PrecisionSeal Industries machines ring joint gaskets to precise API dimensional standards from bar stock, ensuring exact fit to API standard flanges and minimising the risk of joint leakage.

We manufacture both oval ring and octagonal ring types, with the octagonal profile being preferred for its superior seating on modern API ring grooves. Material selection is critical for RTJ gaskets — we supply rings in low carbon steel, 4130/4140 alloy steel, 316 stainless steel, Inconel 625, Hastelloy, duplex, and super duplex, depending on the fluid handled and operating environment.

RTJ gaskets are the specified sealing solution for wellheads, Christmas tree equipment, subsea flanges, high-integrity pressure relief systems, and any application where the API BX or RX groove standard applies. Our tight machining tolerances ensure proper groove contact and prevent the gasket from rocking or seating incorrectly during assembly.

PTFE (polytetrafluoroethylene) gaskets are the preferred choice when chemical resistance is the primary design requirement. PrecisionSeal Industries manufactures PTFE gaskets in both virgin PTFE and expanded PTFE (ePTFE) forms, cut to any standard or custom flange dimension using our precision flat-bed cutting systems.

Virgin PTFE offers near-universal chemical resistance — it resists virtually all acids, alkalis, solvents, and aggressive industrial fluids except for molten alkali metals and elemental fluorine. This makes it the standard sealing material in chemical plants, pharmaceutical manufacturing, food processing, and semiconductor fabrication environments where contamination risks from other gasket materials are unacceptable.

Expanded PTFE (ePTFE) provides improved creep resistance compared to virgin PTFE, which is particularly important on glass-lined and fragile flanges where over-torquing must be avoided. Our ePTFE gaskets conform better to irregular flange surfaces, making them excellent for older flanges with surface imperfections. We also supply PTFE envelope gaskets (PTFE over a soft filler core) for applications requiring both chemical resistance and compressibility.

Rubber gaskets remain one of the most widely used sealing solutions in general industry due to their flexibility, compressibility, and ability to seal effectively on imperfect flange surfaces with minimal bolt load. PrecisionSeal Industries manufactures rubber gaskets from a broad range of elastomer grades — EPDM, NBR (Nitrile), SBR, Neoprene, Silicone, and Viton — each selected to match the specific fluid, temperature, and environmental conditions of the application.

EPDM rubber gaskets are the standard choice for water, steam, and outdoor-weathered applications. NBR gaskets are specified for oils, fuels, and hydraulic fluids. Silicone gaskets serve applications requiring extreme flexibility at both high and low temperatures. Viton (FKM) gaskets are used where superior chemical and heat resistance beyond standard rubber grades is required.

We cut rubber gaskets using our CNC flat-bed cutters from sheet stock, allowing precise production to any shape — circular, rectangular, square, or complex profile. Custom odd-shaped gaskets, non-circular cuts for machinery covers, and irregular flange profiles are all standard work for our cutting team. No tooling charges apply on rubber gaskets.

Flexible graphite gaskets are the material of choice when operating temperatures exceed the limits of rubber and PTFE. PrecisionSeal Industries manufactures graphite gaskets from high-purity flexible graphite sheet — available in pure graphite and graphite-with-metallic-insert (tanged or solid metal core) configurations. Purity levels from 98% to 99.9% carbon are available depending on the application sensitivity.

Pure flexible graphite maintains sealing integrity across an extraordinary temperature range, from cryogenic service up to 650°C in oxidising atmospheres and up to 3000°C in inert or reducing atmospheres. This makes graphite gaskets the specification of choice for steam lines, high-temperature reactors, furnace flanges, heat exchangers handling hot process fluids, and any equipment where thermal cycling is severe.

Graphite also exhibits excellent stress relaxation resistance compared to PTFE and soft rubber — it does not creep under sustained bolt load, which means the seal retains its clamping force over extended service periods without re-torquing. Our graphite gaskets are manufactured to ASME and EN dimensional standards and can be supplied in sheet form, as cut gaskets, or as spiral wound filler material.

CNAF — Compressed Non-Asbestos Fibre — gaskets were developed as the direct performance replacement for traditional compressed asbestos fibre (CAF) gaskets following asbestos bans in industrial use. PrecisionSeal Industries manufactures CNAF gaskets from high-performance composite sheet materials that combine synthetic mineral fibres, organic binders, and filler compounds to deliver sealing performance comparable to or exceeding that of original asbestos-based products.

CNAF gaskets offer a good balance of chemical resistance, thermal stability, and compressibility that makes them suitable for a broad range of general industrial applications — flanged piping, valve bonnets, pump housings, and heat exchanger cover plates in services where a single gasket material must handle variable operating conditions. They are particularly valued where the operating fluid may change periodically or where conditions do not justify the cost of spiral wound or RTJ metallic gaskets.

We supply CNAF gaskets in standard grades suitable for air, water, steam, oils, and mild chemicals, as well as upgraded grades for acids, alkalis, and hydrocarbon services. All CNAF sheets are manufactured without asbestos, ceramic fibres, or other restricted materials, and are compliant with RoHS and REACH directives.

PrecisionSeal Industries is equipped for high-volume gasket production across all material types — from thousands of identical rubber gasket cuts to hundreds of complex spiral wound assemblies for a refinery's scheduled maintenance programme. Our bulk manufacturing capability is built on in-house raw material stocks, multiple production lines, and quality control checkpoints at every stage of fabrication.

Procurement managers and materials purchasing teams choose our bulk manufacturing service because we provide consistent dimensional accuracy across large batches, full documentation per shipment, and reliable delivery scheduling that integrates with their maintenance planning calendars. We accept blanket orders with staggered delivery schedules, allowing clients to reduce inventory carrying costs while ensuring supply continuity.

Our bulk pricing structure removes the per-unit premium associated with small orders — volume discounts are applied transparently from the first order. We provide detailed packing lists, lot traceability records, and MTC documentation with every bulk shipment. For annual frame contracts, we offer dedicated stock allocation so that your specific gasket specifications are always available for immediate call-off.

Selecting the wrong gasket material or specification for an application is one of the most common causes of premature sealing failure and unplanned maintenance downtime. PrecisionSeal Industries provides technical sealing consultation as a standard service — available to all clients, free of charge — because the right gasket selection directly determines whether our products perform as guaranteed.

Our consultation service is delivered by engineers with direct manufacturing experience and deep knowledge of how different gasket materials behave under real operating conditions. We review your application data — operating temperature, pressure rating, process fluid composition, flange standard, surface finish, and regulatory requirements — and recommend the optimal gasket type, material grade, dimensions, and installation procedure.

Consultation is available by phone, WhatsApp, email, or in-person at our India facility. For clients managing complex plant modifications or new installations, we can review P&ID sections and provide sealing recommendations for multiple joint types in a single engagement. We also provide guidance on bolt torque requirements, gasket compression targets, and re-assembly best practices after gasket replacement.