Industrial Sealing & Maintenance — Since 2001
Asia-Pacific Technologies supplies mechanical seals, gland packing, gaskets and industrial maintenance products — sourced through a global network of principals and delivered as a reliable, economical alternative to costly OEM spares.
Global
Sourcing Network
2001
Established
Cost‑Effective
Sealing Solutions
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Single Cartridge Mechanical Seal — 3D Assembly
About the Company
Asia-Pacific Technologies is an industrial maintenance and sealing product supplier. We represent reliable and well-established local and international brands across mechanical seals, non-asbestos gland packings, non-asbestos gaskets, O-rings and non-asbestos insulation materials — supported by a substantial standing inventory and the engineering judgement to match the right product to the right duty.
Our sister concern, Lahyde Sealing Materials Company, is an international sourcing company for industrial sealing and maintenance products. Lahyde is the first Pakistani company to offer a comprehensive range of industrial sealing products under its own proprietary brand name — LAHYDE — developed in collaboration with its foreign principals. It was established in 2001 by a group of management.
Between the two companies we cover the full maintenance cycle: sourcing and supplying sealing products, offering quality-matched alternatives to costly OEM spares, and refurbishing seal components in-house through our precision face lapping service.
Our customers span power generation, refineries, fertilizer, chemical, cement, sugar, pulp & paper, textile, pharmaceutical and food & beverage plants across Pakistan — from single emergency replacements to scheduled plant-wide shutdown supply.
A dependable, economical source for replacing costly OEM spares without compromising quality or performance.
A worldwide network of manufacturing principals across Europe, North America and Asia.
Products aligned with Fluid Sealing Association (FSA) and API conformance requirements.
Substantial standing inventory enabling fast response across a broad range of industries.
Industries We Serve
From a single emergency replacement to a scheduled plant-wide shutdown, we supply, repair and re-lap sealing products across the process industries — matching the seal, packing or gasket to the duty, the media and the equipment actually installed.
Product Categories
A broad, standing inventory of sealing and maintenance materials — built to meet requirements quickly, across a wide range of industrial applications.
01
Mono & multi-spring, component, cartridge, single & double, elastomer and metal bellow seals for pumps, mixers and rotary equipment.
02
Faces in carbon, silicon carbide, tungsten carbide and ceramic, plus O-rings, springs and critical seal components.
03
Non-asbestos graphite, carbon yarn, PTFE, gPTFE and aramid packing for valves, pumps and stationary equipment.
04
Non-asbestos, graphite, PTFE, spiral wound, metal jacketed and wire-reinforced gaskets for high-pressure duty.
05
Full material range including Viton, EPDM, NBR, Kalrez, PTFE-encapsulated and silicone, in metric & imperial sizing.
06
Non-asbestos fiberglass, ceramic and graphitized cloth, tape and rope, plus fabric expansion bellows.
07
Replacement gaskets and plates for plate & frame heat exchangers, including discontinued profiles.
08
Single & double-lip rubber and PTFE hydraulic seals in Viton, silicone and other special materials.
09
Original and interchange filtration elements sourced against a wide range of industrial equipment.
Services
Full refurbishment of all major seal brands — saving up to 60% against buying new.
See the programme →Worn seal faces re-lapped to a mirror finish and verified flat under monochromatic light.
See the process →Locating and delivering hard-to-find sealing and maintenance items through an international principal network.
Economical, quality-matched replacements that reduce reliance on costly original equipment spares.
Products supplied in line with Fluid Sealing Association and API conformance standards.
Project management, source selection and engineering coordination to match the right product to the right application.
A flexible approach to customization and pricing structured to help clients reduce annual maintenance spend.
Seal Repair Programme
Asia-Pacific Technologies provides high quality seal repair and refurbishment services, in collaboration with our foreign principals, for most major brands of mechanical seal used on centrifugal pumps, mixers and other rotary equipment — in power plants, refineries, fertilizer plants, pharmaceutical plants, food industries and chemical industries.
This is done at substantially lower cost than purchasing new or remanufactured seals from the OEM. Repaired seals can also be upgraded in the process — replacing carbon faces with silicon or tungsten carbide for far less than the cost of upgrading to a new seal.
Our principals operate their own machining centres and hold a detailed library of component drawings carrying the original seal specifications, so any component of a mechanical seal can be built to order. We can also design replacement mechanical shaft seals from samples of any major seal brand.
Key Benefits
Every seal we repair is cleaned or sand blasted, inspected to factory tolerance, and fitted with new faces, springs, elastomers, set screws and setting clips as required — then assembled and shipped.
Our Process
Depending on the seal type and the work required, the repair process encompasses the following operations. The assessment stage exists primarily to determine which components need replacing: every part is cleaned first, then inspected against the manufacturer’s original dimensions, tolerances and finish.
01
Seals are decontaminated in accordance with international standards for the handling of substances hazardous to health, then carefully disassembled. Components are thoroughly cleaned in preparation for technical assessment.
Seals are booked onto an electronic administration system, which ensures efficient repair, accurate scheduling and localised reporting for each core operation.
02
The assessment process determines which components of the mechanical seal require refurbishment or replacement. It also identifies the materials of construction, and requires a thorough understanding of mechanical seal construction, operation and application.
Every component is inspected against the manufacturer’s original dimensions, tolerances and surface finish. Remote clients can complete our Seal Questionnaire Form, which helps us assess how the seal has been operating.
Cartridge seal assembly — components and materials identified at assessment
03
Where the seal was made by another manufacturer, the repair work identified at technical assessment is evaluated by a commercial technician. Source of supply, cost and lead time are all taken into account in generating the quotation.
04
Components requiring replacement are measured in detail on a co-ordinate measuring machine. Known standards are applied to those measurements to compensate for wear and damage, and the resulting data is used by an engineering draughtsman to produce a CAD drawing.
Local clients can bring parts to our head office, where our technical staff are qualified to take the necessary dimensions and convert them to CAD.
05
Replacement components are sourced and refurbished across a range of materials including standard and exotic metals, elastomers, plastics, PTFE and carbon.
Diamond grinding handles hard face materials such as ceramics and carbides, and diamond lapping equipment laps seal faces up to 34″ in diameter to within two helium light bands. Components we do not hold are brought in through our international supply network, so the rebuilt seal matches the original specification.
06
The repaired seal is assembled to documented procedures. Once assembled, it is pressure tested in line with the recognised API 682 standard for air pressure testing.
We collect your old retainers and spring holders, and return a complete seal that is as good as new.
Component by Component
After a service life of two to four years the wearing parts of a mechanical seal can no longer be used — even re-lapping becomes impossible — and they have to be replaced. In many cases the complete seal gets replaced with it.
There is no need for that. Experience shows the metal parts — retainer, spring holder, springs and lock rings — hardly wear at all and can be reused many times. We specialise in reconditioning seals and supplying the parts that genuinely need replacing.
Completely reconditioned with new screws and checked for cracks, fully guaranteed. Where a retainer is damaged beyond recovery, a new one can be provided.
Springs and thrust rings can be reused where they are found in good condition, and are otherwise replaced with new.
These parts are always recommended for replacement with new.
These parts are recommended for replacement with new. Repaired seals can also be upgraded here — carbon faces changed for silicon or tungsten carbide.
These parts can be reused in most cases. Scored sleeves are recommended for replacement.
Materials
We offer a wide range of standard materials as well as special materials for even the most corrosive and abrasive services, and will assist in selecting the most appropriate material for a particular application.
Typical examples include carbon-graphite, pure carbon, silicon carbides, tungsten carbides, ceramics, elastomer O-rings (Viton, EPDM, Kalrez, NBR), PTFE parts, special alloys and stainless steel grades.
Our principals operate uniform procurement procedures for the raw materials, goods and services that go into their products, so that everything conforms to specified requirements. Raw materials are procured from world-renowned manufacturers.
Material
Seal faces; Carbon, Carbon-Graphite, Silicon Carbide, Alumina-Oxide Ceramic
Sintered Silicon Carbide
Elastomers & Plastics — PTFE, O-Rings, Bellows
Hastelloy “C” Springs, Metal Bellows & Other Parts
Metal Components; Stainless Steel Alloys — SS 316L, SS 304, SS 321
Rotary & Stationary Faces
Secondary Seal — Flexible Member
Springs & Other Metal Components
Almost every seal can be repaired. As long as the retainer is not completely damaged it can be checked and reconditioned, and every other part replaced — saving around 60% of the cost of a new seal.
In-House Capability
Face lapping is the process of rubbing a mechanical seal ring against a flat lapping plate charged with abrasive grit, removing material a few microns at a time until the sealing face is returned to a mirror finish and a true, measurable flatness.
It matters because a mechanical seal holds pressure across a gap thinner than a light wave. The two faces — one turning with the shaft, one held still in the gland — only seal if both are flat to within a fraction of a micron. Ordinary running wear, thermal distortion, chemical attack and dry-running heat all destroy that flatness long before the ring itself is worn out.
Rather than scrap the component, we re-lap it. A worn silicon carbide, tungsten carbide, carbon or ceramic face can usually be recovered several times over its life, at a fraction of the cost of a new seal — and returned to service with a face finish equal to a new part.
Typical Achievable Results
The Equipment
Our dual face processing equipment delivers exceptional performance for the simultaneous machining, lapping and polishing of both surfaces on high-precision components. Engineered to handle an extensive variety of materials, these systems maintain remarkable accuracy and repeatability while achieving extremely stringent dimensional tolerances.
Their gentle yet effective processing capability makes them ideal for handling sensitive and brittle materials, minimising component stress and delivering outstanding surface finishes.
Both faces machined at once, holding parallelism across the part
Repeatable to extremely tight dimensional tolerances
Low-stress processing suits brittle and sensitive materials
Wide material range, from carbon and ceramics to hard carbides
The Process
01
The used seal is stripped and each ring is degreased and examined. We check for heat checking, edge chipping, radial cracks, blistering and chemical attack, and measure the remaining face width against the minimum the design allows.
Rings that are cracked through, worn past their usable face width or damaged into the drive features are rejected at this point rather than lapped — a face that cannot be recovered is reported back, not returned to service.
02
The rings are loaded face-down into conditioning rings on a rotating cast-iron or ceramic lapping plate. Diamond compound is applied to the plate, and the machine turns: the plate rotates under the work while each conditioning ring turns on its own centre, so no point on the face follows the same track twice.
That random cutting path is the whole point — it removes material evenly across the face instead of cutting a directional pattern into it. Work moves down through progressively finer diamond grades, from a 6 micron fast-cut to a 3 micron and finally a 1 micron finishing stage, with the plate cleaned and re-charged between grades.
03
Every lapped face is measured optically before it leaves. Nothing is signed off on appearance alone.
04
The faces come off the plate polished and reflective, flat within tolerance and measurably as good as new. Rings are cleaned down, given a final visual check under magnification and protected for transit.
They go back into the same seal with fresh elastomers and springs, or into stock as a refurbished spare — ready to be fitted exactly as required, with no compromise in service life against a new component.
Send us the used parts and we will assess whether they can be recovered. Most silicon carbide, tungsten carbide, carbon and ceramic faces can be re-lapped several times.
Request a Quote
The data form below gives us the shaft and stuffing box dimensions, duty conditions and fluid data we need to identify the right seal and price it accurately. Every field is optional — send what you have and we will come back to you.
Request a Quote
Give us as much as you can — every field is optional. The more you fill in, the more precisely we can identify and price the seal, but a few dimensions and a photograph are often enough to get started. All dimensions in millimetres unless you state otherwise.
Enquiring About
Service Request
For a repair or a face lapping job, this shorter form is all we need — a description of the condition, and a photograph if that is easier. Nothing here is required.
Service Request
Tell us what you have and we will come back to you. Nothing here is required — send as much or as little as you like, and attach a photograph if it is easier than describing the part.
