Type 28ST 4 Pages. Type 28AT 6 Pages. SE2 ScrewPumps 4 Pages. SEW Ahlstar 4 Pages. Mechanical Packing 12 Pages. Tilting Pad Bearings 20 Pages. Engineered Coupling Solutions 12 Pages. General Purpose Industrial Seals 8 Pages.
Fuel Gas Filtration 8 Pages. General: Typical applications; steam quench on hot services to retard coking, nitrogen quench on cold or cryogenic service to prevent icing, or water quench to prevent crystallization or accumulation of product on the atmosphere side of the seal. May be used with or without a steam deflector. For steam quenches a steam trap is recommended.
A pressure indicator is optional. General: The system includes a loop to by-pass the orifice to prevent high pressure on the atmospheric side of the seal. It utilizes a level transmitter on a reservoir to set off an alarm when excess leakage is detected. General: The system includes a loop to by-pass the isolation valve to prevent high pressure on the atmospheric side of the seal.
It utilizes a level transmitter on a reservoir to set off an alarm when the reservoir is full. It utilizes a pressure transmitter to monitor seal leakage and set off an alarm when leakage becomes excessive or in the case of seal failure. Advantages: Utilizes a throttle bushing inboard of the drain port to restrict the flow of excessive leakage to drain, allowing a pressure increase to be monitored or trigger an alarm on seal failure.
General: Leakage from the drain port should be collected and piped to a liquid recovery system or sump. Gland throttle bushings should consider the fluid properties. Advantages: Utilizes an orifice plug in the drain port to restrict the flow of excessive leakage to drain, allowing a pressure increase to be monitored or trigger an alarm on seal failure.
The orifice plug should consider the fluid properties. Typically this plan is used when the purchaser may use buffer gas in the future. General: Plan 72 is normally used with Plan 75 for primary seal leakage that is condensing, or with Plan 76 for non-condensing leakage. PLAN 72 Description: Plan 72 for secondary containment uses an external low pressure buffer gas, usually nitrogen, regulated by a control panel that injects it into the outer seal cavity.
Leakage to atmosphere is an inert gas. Zero emissions. General: The barrier gas is usually a pressurized nitrogen line. PLAN 74 Description: Plan 74 provides a pressurized gas, typically nitrogen, to dual gas seals through the use of a control panel that removes moisture, filters the gas and regulates the barrier pressure. General: Plan 75 can be used in conjunction with a gas purge from Plan PLAN 75 Description: Plan 75 is a collection system used with secondary containment seals for process fluid that will condense at lower temperatures or is always in a liquid state.
General: Plan 76 can be used in conjunction with a gas purge from Plan Seal and material performance can vary with application, pressure, temperature and installation. For application specific calculations consult John Crane. Steel AGr NOTE: The limits shown are for guidance only, and do not take into account any site experience. In the interest of continuous development, John Crane Companies reserve the right to alter designs and specifications without prior notice.
It is dangerous to smoke while handling products made from PTFE. Old and new PTFE products must not be incinerated. John Crane Seal Piping Plan. Seal Selection Guide john Crane April They feature dimensional stability, resilience, conformability, and extrusion resistance. John Crane recommends that a flush be used with these products. Packing can be die-formed to exact dimensions for ease of installation and enhanced performance Your most recent searches Delete.
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