Plugs, Covers, Seals
Preferred Engineering types of plugs, covers, and seals are well respected in the nuclear industry. The demands in today's shorter outages often require a more creative approach. The incentive for use of a plug varies with the circumstances, and we can assist in evaluating your specific conditions. Our ability to customize plugs, covers, and seals has been a staple of our company since its 1980 founding.
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Instrument Nozzle Plug
Polished stainless steel assembly with passive compression and proven sealing technology.
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Main Steam Line Plugs (MSLP)
Designed for easy and efficient installation our MSL Plugs cut Critical Path time significantly and reduce dose.
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Jet Pump Riser Plug (Transition Plug)
Preferred supplies two versions of Riser Plug both composed of an anodized aluminum and stainless steel body with thick self-compensating EPDM seal(s).
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Jet Pump Plugs
Electropolished stainless steel weldment with Anodized Aluminum body specially designed to seal the Jet Pump mixer nozzle.
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Recirculation Suction Nozzle Plug
The Preferred Recirculation Suction Nozzle Plug (N1) is a specialized plug specifically designed to match the ID of the reactor vessel.
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Cavity Floor Covers
Designed with the PE signature fast action cam toggles, the aluminum design offers stations an upgrade from OEM hatch covers.
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Custom Covers
The Preferred Engineering Covers are constructed from polished stainless steel for easy decontamination, and offers a unique design which includes our Quick-Lock© Toggle Bolt System.
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Custom Seals
Preferred Engineering has a long history of designing and manufacturing custom seals for generating stations. We focus on cost effective, easily installed seals with a long operational life.
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Gate Valve Plug
The Gate Valve Plug is a stainless steel assembly with a simple effective design that makes it a perfect utility for sealing pipes and valves when maintenance is needed.
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Reactor Vessel Bottom Head Drain Plug
The RPV Drain Plug permits the performance of downstream piping and valve maintenance without the need to drain the vessel or the use of freeze seals.
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Reactor Water Storage Tank (RWST) Plug
The Preferred Engineering Reactor Water Storage Tank Plug (RWST) has two basic designs, the Manually Actuated Plug, and the Passive Spring Actuated Plug.
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Stud Hole Plug Set
The Stud Hole Plugs are machined from UHWM plastic and are designed to ‘rest’ on the top thread and seal on counter bore walls.
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Valve Housekeeping Plug
The specialized Valve Housekeeping Plug was developed by Preferred Engineering to prevent water from interfering with welding operations.
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