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API Plan 51 is a quench system for use on the atmospheric side of a single seal. This system acts as a dead-ended reservoir for a fluid. API Plan 51 Kit contents shown solid and include some optional components. This plan: Prevents icing on the atmospheric side of the seal Is typically used ...

API Plan 62 delivers an external quench fluid to the atmospheric side of the seal. A typical application in a refinery is the prevention of coking on seal faces in hot hydrocarbon service by employing a steam quench. Nitrogen or clean water may also be used to quench or cool and clean the atmospheri...

API Plan 65A monitors leakage in a single seal arrangement. Connected to the drain port on the gland, a reservoir collects normal leakage and is constantly open to drain. In the event of a seal failure, an orifice fitting on the outlet of the system allows a level transmitter to trigger an alarm due...

API Plan 65B monitors leakage in a single seal arrangement. Connected to the drain port on the gland, a reservoir is allowed to collect normal leakage. A level transmitter on the reservoir triggers an alarm in the event of excessive leakage. A valve on the outlet side of the reservoir is typically l...

< Back to Mechanical Seal Support Systems Seal Support System Between Seal Plans Seal Plan Assemblies Swagelok-built between seal plans for seal support are available as seal plan assemblies only. Optionsand configurations not listed in the ordering numbering structure are also available, and sea...

< Back to Between Seal Plans API Seal Plan 52 utilizes a reservoir and circulates an unpressurized buffer fluid between the inboard and outboard seals. To provide positive circulation through the support system and into the seal, a pumping ring is employed. Frictional losses in the buffer fluid inl...

API Plan 53A utilizes a reservoir and circulates a pressurized barrier fluid between the inboard and outboard seals. The typical source of pressurization is plant nitrogen. The reservoir should be set at least 20 psi (1.3 bar) above maximum seal chamber pressure. This is to ensure that leakage acros...

API Plan 53B circulates a pressurized barrier fluid between the inboard and outboard seals. The source of pressurization is a bladder accumulator. Plan 53B has the advantage of not allowing gas absorption into the barrier fluid which may allow for operation at higher pressures than Plan 53A. Barrier...

Better by Design: Swagelok Seal Support Systems Swagelok leverages deep fluid system expertise to design and construct simple-to-configure, easy-to-maintain,and safe-to-operate seal support systems. If you are tasked with keeping rotating equipmentonline and operating efficiently, you will find tha...

< Back to Between Seal Plans API Plan 75 collects leakage from the inboard seal in applications where normal process fluid leakage can condense between the seals at ambient temperatures. In this arrangement, a reservoir is connected to the containment seal drain port on the gland. Condensed leakage...