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Complete Source for Mechanical Seal Support Systems
Seal Support Systems
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Mechanical Seal Support Systems
John Crane Lemco is your complete source for mechanical seal support
systems. Providing unrivaled expertise, innovation and reliability,
John Crane Lemco is the solution. For over 80 years John Crane has
been redefining the limit of seal support technology.
John Crane is the acknowledged leader in the design and manufacture
of engineered seal support systems. Our customers benefit from our
global presence with over 200 facilities throughout the world.
Our product offering is
unmatched
Lemco provides an extensive product offering,covering the complete spectrum of sealing
applications from liquids to gasses, cryogenic
to boiling, abrasive liquids to the purest
finished product.
A full range of standard product offerings,
including buffer/ barrier fluid reservoirs, heat
exchangers — both air- and water-cooled,
abrasive separators, and pump seal gas
control panels, provide the short lead timesrequired of a pre-engineered product.
Custom engineered systems, such as closed
loop barrier fluid circulators, multiple seal
systems, and compressor gas seal panels,
focus on the specific mechanical seal
application. A close working relationship with
seal design engineers provides a packaged
solution to your sealing challenges.
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PLAN 53A
PLAN 52
PS
Reservoirs
RE-1203 / RE-1205
Rated to 200 psig and designed for light
duty applications in the Chemical, Food,
Pharmaceutical, Paper and Pulp, and Water
Treatment Industries.
Capacity: 2.2 Gallons / 8 Liters
Materials: 316 Stainless Steel
RE-1618
Designed for API Plans 52 and 53 applications
in the Refinery, Petrochemical, Chemical
Processing, and Pipeline Industries.
Capacity: 2 to 5 Gallons / 8 to 18.5 Liters
Materials: Carbon Steel, 304 and
316 Stainless Steel
RE-1603
Designed for ANSI Plans 7352 and 7353
applications in the Chemical and
Petrochemical Industries.
Capacity: 2 to 5 Gallons / 8 to 18.5 Liters
Materials: Carbon Steel, 316 Stainless Steel
RE-1518
Ellipsoidal head reservoir for API Plans 52 and
53 applications in the Refinery, Petrochemical,
Chemical Processing, and Pipeline Industries.
Capacity: 2 to 5 Gallons / 8 to 18.5 Liters
Materials: Carbon Steel, 304 and
316 Stainless Steel
RE-1518RE-1618RE-1603RE-1205
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Mobile Refill Carts
Available in 10 and 50 gallon capacity, these portable units provide a means to refill a seal reservoir whilestill in operation. Each unit is complete with an atmospheric reservoir, hand pump, and hose assembly
with quick connect end.
Abrasive SeparatorsAbrasive separators improve mechanical seal life by cleaning the stream of process fluid used
to flush the mechanical seal. John Crane provides a range of separators to suit a variety of
pressure, flow, and material requirements.
Flow Rate: 1 to 33 gpm
Materials: 316 Stainless Steel, Monel®, Duplex, and Super Duplex
Max. Pressure: 3000 psi / 207 bar
Leakage Detection Systems
Used in single seal applications to capture and monitor leakage. Available in Carbon Steel
or 316 Stainless Steel construction and equipped with a high level switch.
4
Refill Carts, Abrasive Separators,
and Leakage Detection Systems
50 Gallon10 Gallon
Monel is a registered trademark of Inco Alloys International, Inc.
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PLAN 52
PLAN 53C
LSL
API 682 Plans 52 and 53A Reservoirs
These reservoirs are designed to meet the requirements of API 682 for Plans 52and 53A. The systems are supplied as complete assemblies ready to install.
These 3 and 5 gallon capacity reservoirs are offered in two versions; welded
ellipsoidal head, and flanged removable bottom head for ease of internal
cleaning. Instruments available are Pressure Indicator, Pressure Switch and
Level Switches.
The API 682 Reservoir Systems are designed for the Refinery, Petrochemical, and
Chemical Industries.
Capacity: 3 Gallon and 5 Gallon Working Capacity
Materials: 316L Stainless Steel
API 682 Plan 53B
Plan 53B is a dual pressurized system that eliminates direct gas contact with the barrier liquid.
The Plan 53B uses a bladder accumulator as a physical barrier between the gas and the barrier
fluid. The bladder is pressurized with gas prior to filling the system with barrier liquid. As the
system is filled, the bladder is compressed thus providing a positive pressure on the barrier liquid.
Circulation is via a pumping ring, and a heat exchanger (air- or water-cooled) is added to the seal-
ing loop to provide cooling.
Capacity: 2.5 / 5 / 10 Gallon Accumulator Size
Materials: Stainless Steel, Monel, Carbon Steel
Max. Pressure: 1500 psi / 103 bar
API 682 Plan 53C
Plan 53C is a dual pressurized system that eliminates the use of gas for pressurization through
the use of a piston reservoir. Barrier liquid is stored on the top side of the piston, which
travels the length of the vessel dependent upon the change in barrier liquid volume.A reference pressure, typically taken from the seal chamber, is provided on the bottom
of the piston. The difference in area on either side of the piston creates a 10% increase in
the barrier liquid pressure across a full range of operating pressures. This system is ideal
for applications that have fluctuating pressures.
Circulation is via a pumping ring, and a heat exchanger (air- or water-cooled) is added to
the sealing loop to provide cooling.
Capacity: 5.25 Gallons
Materials: 316L Stainless Steel
Max. Pressure: 1175 psi / 81 bar
API 682 2nd Edition Products
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PLAN 72
FSH
PLAN 75
PSH
API 682 Plan 72 Gas Control Panel
Used in a dual un-pressurized seal arrangement where the secondary seal is dry running. A low-pressuregas, typically nitrogen, is introduced in the area between the two seals to sweep primary seal leakage
away from the secondary seal, thus preventing fugitive emissions from escaping into the atmosphere.
Used in conjunction with Plans 75 or 76.
API 682 Plan 75 Condensate Collection Reservoir
Used in a dual un-pressurized seal arrangement where the secondary seal is dry running. Connected to
the drain port of the seal gland, condensed primary seal leakage is collected and monitored. Constructed
of carbon steel, the minimum system components include a sight level gauge, pressure switch, andremovable head for cleaning of the system. Can be accompanied by Plan 72 to ensure fugitive emissions
are not released into the atmosphere.
API 682 Plan 76 Vent to Flare Panel
Used in a dual un-pressurized seal arrangement where the secondary seal is dry running. Connected to
the vent port of the seal gland, non-condensing primary seal leakage is monitored and routed to the flare
or vapor recovery system. Can be accompanied by Plan 72 to ensure fugitive emissions are not released
into the atmosphere.
API 682 Plan 74 Gas Control Panel
Used on non-contacting, dual pressurized seals, this system filters, regulates,
and monitors the gas supply, typically nitrogen, used to lubricate the seals.
Type 2800 Seals
6
Plan 72 or 74 Gas Control Panel
Note: API 682 is equivalent to ISO Standard 20149.
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PLAN 21
PLAN 23
Water-Cooled Heat Exchangers
Primarily for use in Plan 21 and 23 applications, this heat exchanger is alsoavailable in compliance with API 682. Designed for easy installation and
maintenance, the HXR model is ideal for Refinery, Petrochemical, Chemical
Processing, and Pipeline Industries. These heat exchangers can also be
incorporated into seal support system packages.
Standard Materials: Carbon steel shell with 316 Stainless Steel tube
Available Cooling Area: 1.9 Ft2
2.6 Ft2
3.9 Ft2
5.9 Ft
2
7.07 Ft2
Air-Cooled Heat Exchangers
Primarily for use in Plan 21 and 23 applications, these heat exchangers can also be used
as an integral part of a packaged seal support system. Designed for easy installation and
maintenance, the LHXF model is ideal for Refinery, Petrochemical, Chemical Processing,
and Pipeline Industries.
The use of Air-Cooled Heat Exchangers eliminates the need for cooling water and
provides substantial savings in reduced water usage, waste-water treatment, and the
elimination of cooling water piping.
Standard Materials: 316 Stainless Steel tube with 304 Stainless Steel tension
wrapped fins, 304 Stainless Steel base and frame
Available Cooling Area: 19 Ft2
29 Ft2
39 Ft2
Heat Exchangers in Packaged Systems
Seal support systems can be designed and packaged using the John Crane heat
exchangers. These systems are varied in their duty and design, and can be used in
seal oil systems, lube oil systems, and closed loop circulation systems.
Heat Exchangers
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Compressor Gas Control Panels
Application-specific control systems ensure a clean,
controlled flow of gas to non-contacting seals used in
compressor applications, while monitoring seal perfor-
mance. John Crane Lemco seal support systems create the
ideal seal environment to maximize seal performance,
increase seal life, extend Mean Time Between Planned
Maintenance, and improve emissions control.
John Crane Lemco seal support systems
include Type 28XP and 28AT panels in
tandem and double configurations.
John Crane Lemco works closely with all parties in order to match theproper panel with the application. Each panel is tailored to meet the end-
user’s specifications, which ensures integration with the plant’s control
system and maintains commonality of components.
Complete packages include filtration and systems for monitoring process gas
supply, seal leakage, and separation gas supply. The systems reliably control and
monitor pressure and/or flow with signals for alarm annunciation and automatic
shutdown when specific limits are exceeded.
Type 28 Gas Panel Gas Conditioning Unit(patent number 6715985)
Filter Assembly
Type 28XP Cutaway
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API Plan 54
When barrier liquid requirements for dual pressurized seals exceed the capabilities of a traditionalPlan 53, a Seal Oil System is used. Designated as Plan 54 by API 682, these systems provide flow and
heat removal capabilities exceeding that of a traditional Plan 53 system.
Standard units are available in 10, 20, and 30 gallon capacities, with flows ranging from 1.5 to 4.5 gpm,
and pressures to 3000 psi.
Custom units are available in a wide variety of configurations and can be built to service multiple seals.
Available options include:
• Spare pump assembly
• Duplex filters with
isolation valves
• Air-cooled heat exchangers
• Multiple seal kits
• Pressure maintenance
package
Seal Oil Systems
Note: These systems can also be configured for use in lube oil applications.
Shown with Air-Cooled Heat Exchanger
Standard 10 and 20 Gallon Units
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Our capabilities also include a wide range of custom, closed loop seal oil systems. Used in conjunction with
dual pressurized seals, closed loop systems remain under constant pressure and typically provide the means
to automatically replenish the barrier fluid as required.
10
Shown with Accumulator Safety Package
Custom Lube Oil Skid
System used in mining application,providing seal water to autoclave seals.
System supports six dual pressurized seals, consistsof bladder accumulators and automated refill system.
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For your nearest John Crane facility, please contact one of the locations above.
If the products featured will be used in a potentially dangerous and/or hazardous process, your John Crane representative should be consulted prior to their selection and use.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 handlingproducts made from PTFE. Old and new PTFE products must not be incinerated.
©2004 John Crane Inc. Print 4/04 www.johncrane.com B-LEMCO
John Crane Lemco
Tulsa, Oklahoma USA
Tel: 1-918-835-7325Fax: 1-918-835-5823
NorthAmerica
Morton Grove, Illinois USA
1-800-SEALINGTel: 1-847-967-2400Fax: 1-847-967-3915
Europe
Slough, UK
Tel: 44-1753-224000Fax: 44-1753-224224
Latin America
São Paulo, Brazil
Tel: 55-11-3371-2500Fax: 55-11-3371-2599
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