Dispatched from Chennai · West Bengal
Hydraulic & Pneumatic Seals Supplied to Kolkata
An old, large-bore installed base where identification from a worn sample matters more than a part number.
- Supplying since
- 1991
- Held ex-stock
- Seals, O-rings and packings in Chennai
- Brands represented
- 18 OEM-approved makers
The local picture
What Kolkata runs, and what it wears out
Kolkata's hydraulic fleet skews old, large and wet. Cargo handling at the Kolkata and Haldia docks, dredgers keeping the Hooghly navigable, the engineering and foundry cluster across Howrah and Belur, railway workshops in the region, and jute and tea processing machinery - much of it built before standardised seal kits existed.
Two things follow. Sizes are frequently non-standard or imperial, so identification from a worn sample matters more than a catalogue number; and adjustable chevron packing sets remain genuinely useful, because a gland that can be tightened between overhauls keeps an old ram working where a fixed-section seal would mean a full strip-down. Humidity and the monsoon add a storage problem on top - elastomers left in a damp store degrade before they are ever fitted.
Raj Trading Corporation has supplied heavy plant of this kind since 1991 and holds stock in Chennai, including chevron sets, large-section rod and piston seals and the wear rings that go with them. Send a photograph of the worn packing with its measurements and the team will work back to a profile.
Getting the goods to Kolkata
Kolkata is roughly 1,650 km from the Chennai warehouse and consignments travel by surface transport. Raj Trading Corporation keeps no stock in West Bengal - goods are picked and invoiced in Chennai - so for a planned shutdown it is worth raising the enquiry well before the outage rather than during it. If the destination is inside a port or dock estate, confirm gate pass and consignee requirements when ordering.
The counter and warehouse are at Old No. 39, New No. 81, Moore Street, George Town, Chennai 600 001, Tamil Nadu. Enquiries from Kolkata are handled by the same Chennai team that serves the local trade.
Who this serves
Industries in Kolkata that Raj Trading Corporation supplies
Sealing components for the equipment behind Kolkata's industrial base - cylinders, presses, pumps and process lines that cannot afford downtime.
Port and dock cargo handling at Kolkata and Haldia
Dredging and inland waterway equipment on the Hooghly
Heavy engineering, foundries and fabrication across Howrah and Belur
Railway workshops and rolling stock maintenance
Jute, tea and agro-processing machinery
Steel, power and cement plant maintenance across the wider eastern belt
Priority ranges
Seal families that matter most in Kolkata
Chevron packing sets are ordered here more than in any other city on this list, because so much of the installed base is old, large-bore and fitted with an adjustable gland. Alongside them go heavy-section rod and piston seals, scraper-type wipers for equipment working in silt and dust, and wear rings - which on a worn, side-loaded ram are usually the reason the seal failed in the first place.
Questions
Buying seals for Kolkata
Questions the Chennai team is asked most often by buyers and maintenance engineers in this region.
How many rings go into a chevron packing set?
It depends on gland depth rather than pressure alone: the set is built from a male adaptor, a number of vee rings and a female adaptor, stacked to fill the space available. Measure the gland depth as well as the bore and rod diameter and the team will make up the stack. Getting the depth wrong is the usual reason a new set leaks from the first stroke.
Can seals be identified for machinery with no drawings left?
That is a routine enquiry for equipment of this age. Photograph the worn seal or packing against a scale, measure the inside diameter, outside diameter and section height, and - if the gland is open - the groove dimensions. The team matches the profile against the catalogue and confirms an equivalent. Where the original size is imperial, the nearest standard series is identified explicitly rather than rounded silently.
Does humidity affect seals held in a maintenance store?
Elastomers age faster in heat, damp and light, and polyurethane in particular is susceptible to hydrolysis in a warm humid store. Keep spares in their sealed packing, away from direct sunlight, from heat, and from ozone sources such as electric motors. In a monsoon climate it is better to hold a working stock and reorder than to keep years of cover on the shelf.
Are large-bore sizes held in stock or made to order?
A wide range of large sections is held ex-stock in Chennai, but very large bores and non-standard sections are not something to assume. Send the dimensions early and the team will confirm at the quotation stage whether the item ships from stock or has to be brought in - which matters when planning a dock crane or dredger outage.
Need a seal identified for a machine in Kolkata?
Send the part code, a drawing or a photo of the worn seal with its measured dimensions. Raj Trading Corporation will confirm the profile, material and size and quote from Chennai stock.
Contact the team