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Swagelok ® VCR ®  and VCO ®  Fittings Course Overview:  The Swagelok VCR ® metal gasket face seal fitting and VCO ® O-ring face seal fitting provide leak-tight service in applications where clearance is an issue or components require frequent replacement or service. Learn the differences between VC...

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...

< Back to Mechanical Seal Support Systems Seal Support System Atmospheric Side Plans Seal Plan Kits Swagelok-built atmospheric side plans for seal support are available as seal plan kits only. Each kitcontains everything needed for proper installation, including an engineered drawing, making it s...

< 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...

< Back to Mechanical Seal Support Systems Seal Support System Process Side Plans Seal Plan Kits Most Swagelok-built process side plans for seal support are available as seal plan kits. Each kit containseverything needed for proper installation, including an engineered drawing, making it simple to...

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 13 recirculates flow from the seal chamber to the suction side of the pump. This plan is common for vertical pumps. API Plan 13 Kit components shown solid and include some optional components. This plan: Removes heat and flushes particulate from the seal chamber Allows the seal cham...

API Plan 14 combines Plan 11 and Plan 13. Flow is recirculated from the pump discharge into the seal chamber and from the seal chamber to the pump suction. Fluid flow is increased since the seal chamber is continuously vented, leading to higher cooling capacity. API Plan 14 Kit components shown s...