Piping Plans
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Plan 01 - Single seals - internal flush
Piping PlansDescription: Plan 01 is an internal recirculation from the pump discharge area of the pump into the seal chamber, similar to a Plan 11 but with no exposed piping ...
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Plan 02 - Single seals - no flush
Piping PlansDescription: Plan 02 is a non-circulating flush plan recommended only where adequate vapor suppression can be assured ...
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Plan 11 - Single seals - By-pass from discharge
Piping PlansDescription: Plan 11 is the most common flush plan in use today. This plan takes fluid from the pump discharge (or from an intermediate stage) through an orifice(s) and directs it to the seal chamber to provide cooling and lubrication to the seal faces ...
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Plan 12 - Single seals - By-pass from discharge with strainer
Piping PlansDescription: Plan 12 is similar to Plan 11, except that a strainer or filter is added to the flush line.
Advantages: No product contamination and solids are removed from the flush stream keeping the seal clean ...
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Plan 13 - Single seals - Flush through seal chamber to suction
Piping PlansDescription: In a Plan 13, the flow exits the seal chamber through an orifice and is routed back to pump suction ...
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Plan 14 - Single seals - By-pass from discharge through seal chamber back to suction
Piping PlansDescription: Plan 14 is a combination of Plans 11 and 13. Flush is taken off of pump discharge, sent to the seal chamber, and piped back to pump suction ...
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Plan 21 - Single seals - By-pass from discharge through a heat exchanger
Piping PlansDescription: Plan 21 is a cooled version of Plan 11. The product from pump discharge is directed to a heat exchanger to lower the temperature before being introduced into the seal chamber ...
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Plan 23 - Single seals - Closed loop circulation through a heat exchanger
Piping PlansDescription: Plan 23 is a closed loop system using a pumping ring to circulate product through a heat exchanger and back to the seal chamber ...
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Plan 31 - Single seals - By-pass from discharge through an abrasive separator
Piping PlansDescription: Plan 31 is a variation of Plan 11, where an abrasive separator is added to the flush line. In this plan, the product is introduced to the abrasive separator from the discharge of the pump, clean flush is piped from the separator to the seal chamber and solids are returned to the pump suction ...
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Plan 32 - Single seals - External flush source to seal
Piping PlansDescription: Plan 32 uses a flush stream brought in from an external source to the seal. This plan is almost always used in conjunction with a close clearance throat bushing ...
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Plan 41 - Single seals - By-pass from discharge through an abrasive separator & a heat exchanger
Piping PlansDescription: Plan 41 is a combination of Plan 21 and Plan 31. In Plan 41, product from pump discharge is first put through an abrasive separator and then to the heat exchanger before being introduced to the seal chamber ...
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Plan 52 - Dual seals, unpressurised - External reservoir unpressurised liquid buffer
Piping PlansDescription: Plan 52 uses an external reservoir to provide buffer fluid for the outer seal of an unpressurized dual seal arrangement ...
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