| Type RE – 01 / RE – 01 | Type RE – 01 / RE Rl – 01 B | Type RE – 01 B / RE – 101 B | |
| Temperature | Cryogenics to 260° C | Cryogenics to 260° C | Cryogenics to 260° C |
| Pressure | Vacuum to 200 psi | Vacuum to 750 psi | Vacuum to 1000 psi |
| Speed | Up to 4500 rpm | 4500 rpm | Up to 4500 rpm |
| Size | 3/8″ to 6″ | 3/8″ to 6″ | 3/8″ to 6″ |
A double mechanical seal is a combination of two seals mounted either back-to-back, or single seal having sealing faces on both sides or tandem type. These seals can be single-coiled or multi springs type besides they can have a combination of unbalance / unbalance, unbalance / balance or balance / balance tandem types. These seals are suitable for handling media which otherwise cannot be handled by single seals. For cooling the seal faces during operation, a clear compatible liquid is circulated between two seals at a higher pressure of one bar than the pumped liquid. The internal seal prevents the liquid from entering the circulation system while the external seal prevents it from leaking to the environment.
RANGE OF OPERATION
For sealing highly abrasive, Effervescent or toxic liquids at different Pressure/Temperature ratings
Double Mechanical Seals – FAQs
It is a combination of two seals, arranged back to back, on one face on both sides, or in tandem, used where a single seal cannot safely contain the liquid being pumped, manufactured by Rinku Engineers in Ahmedabad.
It is used for highly abrasive, effervescent or toxic liquids, or applications where leakage to the environment cannot be tolerated, since the second seal provides a backup barrier.
Across the RE 01/RE 01 and RE 01B/RE 101B combinations, temperature runs from cryogenic up to 260 degrees Celsius, with pressure ratings up to 200, 750 or 1000 psi depending on the seal type combination chosen.
A clean, compatible barrier liquid is circulated between the two seals at a pressure about one bar higher than the pumped liquid, which cools the seal faces and stops process liquid from escaping.
Rinku Engineers manufactures double mechanical seal arrangements at its facility in G.I.D.C. Vatva, Ahmedabad, Gujarat, building on its RE 01 and RE 05 single seal ranges.
Price depends on the seal type combination, shaft size and pressure rating required, so Rinku Engineers provides an estimated quotation once these details are confirmed.
Yes, Rinku Engineers supplies double mechanical seal arrangements directly from Ahmedabad, configured to the shaft size and pressure duty of the customer’s pump.
Yes, double mechanical seal arrangements are part of the RE series range Rinku Engineers exports to the Middle East, Africa and Southeast Asia.
Double seals can be arranged as unbalanced and unbalanced, unbalanced and balanced, or balanced and balanced pairs, chosen according to the pressure difference across the two seals.
Across the available configurations, shaft sizes range from three eighths of an inch to six inches, matching Rinku Engineers’ broader RE series sizing.
Yes, double seal arrangements can be assembled using either single coiled or multi spring seal elements, depending on whether the application involves clear liquids or solids bearing liquids.
Back to back seals have both seal faces oriented outward from a shared barrier fluid chamber, while tandem seals are arranged in the same direction, with the outer seal acting as backup to the inner seal.
Chemical processing, pharmaceutical manufacturing and any process handling toxic, effervescent or highly abrasive liquids typically specify double mechanical seals for added safety.
Rinku Engineers’ technical team reviews the process pressure and the properties of the pumped liquid to recommend whether the 200, 750 or 1000 psi rated combination is appropriate.
Yes, a barrier fluid supply and circulation system is required to keep the seal faces cooled and to maintain the higher pressure between the two seals.
Rinku Engineers provides genuine replacement seal elements and barrier system guidance directly from its Ahmedabad facility, drawing on its RE series manufacturing experience.
Yes, double mechanical seals are specifically suited to toxic liquid applications, since the barrier fluid and second seal reduce the risk of process liquid reaching the atmosphere.
Yes, Rinku Engineers’ double mechanical seal range covers standard back to back, tandem and dual face arrangements built from its RE 01 and RE 05 series components.
Speeds up to 4500 RPM are supported across the available double seal combinations, consistent with the underlying RE 01 series ratings.
Contact Rinku Engineers at +91 98250 68004 or info@rinkuengineers.com with the liquid properties, pressure and shaft size, and the technical team will propose a suitable double seal configuration.