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API 682 4th Edition Application Guide
Sealmatic India Pvt. Ltd.
Content
Objectives And Category Details A comprehensive overview on the basic features
Categories, Arrangements, Configurations Seal Types & Spring Positions
Basic seal classification parameters, their defaults, options and relations
Seal Selection By Media GroupsSeal classification parameters and typical service conditions of Non-Hydrocarbons,Non-flashing and Flashing Hydrocarbons
Seal Coding System API seal code and example
Product Locator
Sealmatic mechanical seals and seal supply systems, referring to the seal classification parameters and piping plansof the standard
API Piping Plans With short specifications of all piping plans, symbol library
Selection Of Barrier/Buffer Media For contacting wet dual seals
API 682 4th EditionThis presentation provides basic information about API 682 4th edition. It contains a set of charts and summaries that give a brief overview and represent a step-by-step method to specify and select suitable Sealmatic sealing systems.
API 682 is a standard of the American Petroleum Institute. The charts, summaries and piping plans in this presentation are based on that standard. For further and more detailed information, please refer to the commercially available documents of API 682.
Though defaults and options for several design details are specified by API, options are only permitted with the approval of the customer. The standard does not prevent a vendor from offering or the customer from requesting alternative equipment or engineered products for special applications. This may be particularly appropriate where there are innovative or developing designs and materials.
API 682 4th Edition Category 1
Objectives (4.2)
Operation of seal cartridge Continuously for 25,000 h without need for replacement
Operation of Arrangement 2 outer seal (e. g., containment seal)
At least 25,000 h without need for replacement at any containment seal chamber or buffer fluid pressure equal to or less than the seal leakage pressure setting (not to exceed a gauge pressure of 0.7 bar (10 PSI) and for at least 8 h at the seal chamber conditions).
EmissionsComplying with local emissions regulations or exhibiting a maximum screening value of 1,000 ml/m3 (1,000 ppm vol.) as measured by the EPA Method 21, whichever is more stringent.
Scope and basic design features
Pump shaft sizes (1) 20 … 110 mm (0.75" … 4.3")Seal design (4.1.3, 6.1.1.1) Balanced, internally-mounted, cartridge design, no hook sleeves allowed.
Materials
Seal faces (6.1.6.2.2/4, 6.1.6.2.3) One ring premium grade, blister-resistant carbon graphite (unless service requires two hard materials). One ring reaction-bonded or self-sintered silicon carbide.
Seal sleeves (6.1.6.3) Austenitic stainless steel type 316, 316L, 316TI or equivalent (unless otherwise specified). For alloy pumps in corrosive services same or better alloy as used for the pump casing.Gland plates (6.1.6.7)
Seal flushFlush connection for Arrangement 3 If specified (7.3.2.2)
Distributed flush system for Arrangement 1 and 2 If specified (6.2.1.2.1) or required by 6.1.2.14
DimensionsStandard seal sizes None
Seal chambers (4.1.2) ASME B73.1 and ASME B73.2
Operation limits (4.1.2)Temperature –40 °C … 260 °C (–40 °F … 500 °F)
Max. gauge pressure 20 bar (300 PSI)
BushingsArrangement 1 (7.1.2.1, 7.1.2.2)
Fixed carbon bushingOption: floating carbon bushing
Arrangement 2 and 3Option: fixed carbon bushing, if additional length is available
(7.2.2.1, 7.3.2.1)
Seal qualification test (I.3.5)Category 1 seal RequiredCategory 2 seal Applicable for same seal designCategory 3 seal Applicable for same seal design
Data requirements (Annex E) (7.1.2.8)
ProposalMinimal
ContractPerformance curve of internal
circulation device If specified
Objectives & Category Details
API 682 4th Edition Category 2
Objectives (4.2)
Operation of seal cartridge Continuously for 25,000 h without need for replacement
Operation of Arrangement 2 At least 25,000 h without need for replacement at any containment seal chamber or buffer fluid pressure equal to or less than the seal leakage pressure setting (not to exceed a gauge pressure of 0.7 bar (10 PSI) and for at least 8 h at the seal chamber conditions).outer seal (e. g., containment seal)
EmissionsComplying with local emissions regulations or exhibiting a maximum screening value of 1,000 ml/m3 (1,000 ppm vol.) as measured by the EPA Method 21, whichever is more stringent.
Scope and basic design features
Pump shaft sizes (1) 20 … 110 mm (0.75" … 4.3")Seal design (4.1.3, 6.1.1.1) Balanced, internally-mounted, cartridge design, no hook sleeves allowed.
MaterialsSeal faces (6.1.6.2.2/4, 6.1.6.2.3) One ring premium grade, blister-resistant carbon graphite (unless service requires two
hard materials). One ring reaction-bonded or self-sintered silicon carbide.
Seal sleeves (6.1.6.3) Austenitic stainless steel type 316, 316L, 316TI or equivalent (unless otherwise specified). For alloy pumps in corrosive services same or better alloy as used for the pump casing.Gland plates (6.1.6.7)
Seal flushFlush connection for Arrangement 3 If specified (7.3.2.2)
Distributed flush system for Arrangement 1 and 2 Required (6.2.2.2.1, 6.2.3.2.1) except when piping plan 13 or 23 are specified.
DimensionsStandard seal sizes To fit shafts in even 10 mm increments (6.2.2.3.1)
Seal chambers (4.1.2) API 610
Operation limits (4.1.2)Temperature –40 °C … 400 °C (–40 °F … 750 °F)
Max. gauge pressure 40 bar (600 PSI)
BushingsArrangement 1 (7.1.2.1, 7.1.2.2)
Floating carbon bushingOption: segmented carbon bushing (only if required)
Arrangement 2 and 3Option: fixed carbon bushing, if additional length is available
(7.2.2.1, 7.3.2.1)
Seal qualification test (I.3.5)Category 1 seal –Category 2 seal RequiredCategory 3 seal Applicable for same seal design
Data requirements (Annex E) (7.1.2.8)
ProposalMinimal
ContractPerformance curve of internal
circulation device If specified
Objectives & Category Details
API 682 4th Edition Category 3
Objectives (4.2)
Operation of seal cartridge Continuously for 25,000 h without need for replacement
Operation of Arrangement 2 At least 25,000 h without need for replacement at any containment seal chamber or buffer fluid pressure equal to or less than the seal leakage pressure setting (not to exceed a gauge pressure of 0.7 bar (10 PSI) and for at least 8 h at the seal chamber conditions).outer seal (e. g., containment
seal)
EmissionsComplying with local emissions regulations or exhibiting a maximum screening value of 1,000 ml/m3 (1,000 ppm vol.) as measured by the EPA Method 21, whichever is more stringent.
Scope and basic design features
Pump shaft sizes (1) 20 … 110 mm (0.75" … 4.3")Seal design (4.1.3, 6.1.1.1) Balanced, internally-mounted, cartridge design, no hook sleeves allowed.
MaterialsSeal faces (6.1.6.2.2/4, 6.1.6.2.3) One ring premium grade, blister-resistant carbon graphite (unless service requires two hard
materials). One ring reaction-bonded or self-sintered silicon carbide.
Seal sleeves (6.1.6.3) Austenitic stainless steel type 316, 316L, 316TI or equivalent (unless otherwise specified). For alloy pumps in corrosive services same or better alloy as used for the pump casing.Gland plates (6.1.6.7)
Seal flush
Flush connection for Arrangement 3 If specified (7.3.2.2)
Distributed flush system for Arrangement 1 and 2 Required (6.2.2.2.1, 6.2.3.2.1) except when piping plan 13 or 23 are specified.
DimensionsStandard seal sizes To fit shafts in even 10 mm increments (6.2.2.3.1)
Seal chambers (4.1.2) API 610
Operation limits (4.1.2)Temperature –40 °C … 400 °C (–40 °F … 750 °F)
Max. gauge pressure 40 bar (600 PSI)
BushingsArrangement 1 (7.1.2.1, 7.1.2.2)
Floating carbon bushingOption: segmented carbon bushing (only if required)
Arrangement 2 and 3Option: fixed carbon bushing, if additional length is available
(7.2.2.1, 7.3.2.1)
Seal qualification test (I.3.5)Category 1 seal –Category 2 seal –Category 3 seal Required
Data requirements (Annex E) (7.1.2.9)
ProposalRigorous
ContractPerformance curve of internal
circulation device Required
Objectives & Category Details
Categories, Arrangements, Configurations, Seal Types & Spring Positions
Category Arrangement Seal Type
A
Configuration
1CW-FX
1CW-FL
2CW-CW
2CW-CS Rotating
3CW-FB
3NC-BB
Spring Position
Contacting Wet – FiXed throttle bushing
Contacting Wet – Contacting Wet
Stationary
Stationary
2NC-CS
Rotating
3CW-BB
3CW-FF
3NC-FF
3NC-FB
Seal face surface speed< 23 m/s (75 ft/s)
Seal face surface speed> 23 m/s (75 ft/s)
Non-Contacting – Face-to-Face
Non-Contacting – Face-to-Back
Stationary
Single seal cartridge• Distributed flush system
Balanced pusher sealTemperature: –40 °C … 176 °C (–40 °F … 350 °F)Gauge pressure: 20 bar (300 PSI) / 40 bar (600 PSI) Multiple springs: Alloy C-276 or Alloy C-4
Single spring: SS 316O-Rings: FKM or FFKM
NBR, HNBR, EPM, EPDM, TFE …
Contacting Wet – FLoating throttle bushing
2
Dual seal cartridge p(buffer medium) < p(seal
chamber)
• Internal reverse balance feature
• Distributed flush system (if possible)
• Fixed carbon throttle bushing
BContacting Wet – Containment Seal(non-contacting or contacting CS )
Metal bellows seal with O-RingsTemperature: –40 °C … 176 °C (–40 °F … 350 °F)Gauge pressure: 20 bar (300 PSI)
Metal bellows: Alloy C-276, Alloy 718
O-Rings: FKM or FFKM
NBR, HNBR, EPM, EPDM, TFE …
Non-Contacting – Containment Seal(non-contacting or contacting CS )
3 CDual seal cartridgep(barrier medium) > p(seal
chamber)
• Internal reverse balancefeature
• Fixed carbon throttlebushing
• Flush connection to process side
Contacting Wet – Face-to-Back Metal bellows seal with flexible graphiteTemperature: –40 °C … 400 °C (–40 °F … 750 °F)
Gauge pressure: 20 bar (300 PSI) Metal bellows: Alloy 718 Secondary seal: Flexible graphite
Contacting Wet – Back-to-Back
Contacting Wet – Face-to-Face
Non-Contacting – Back-to-Back
ES
Totally engineered sealing systemTemperature: <–40 °C or > 260 °C
(<–40 °F or > 500 °F) (Category 1)<–40 °C or > 400 °C(<–40 °F or < 750 °F) (Category 2/3)
Gauge pressure: >20 bar (300 PSI) (Category 1)>40 bar (600 PSI) (Category 2/3)
Surface speed: >23 m/s (75 ft/s)Shaft diameter: <20 (0.75 inch) or >110 mm (4.3 inch)
Media:Highly corrosive fluids for which thespecified materials are not suitable,fluids with absolute vaporpressures>34 bar (493 PSI), unstable liquid properties (e. g. multiphase, non-Newtonian), high viscosity or pour point above or within 20 °C (36 °F) of minimum ambient temperature.
For Arrangement 2 and Arrangement 3 the seal types can be mixed across configurations (see note of 4.1.3)
Optional design featureDefault configuration Optional configuration
Rotating11 2 3
AS
ME
B73
.1,
AS
ME
B7
3.2
, A
PI
676
AP
I 61
0
–40
°C…
260
°C,2
0ba
r(–
40°F
…50
0°F
,290
PS
I)
–40
°C…
400
°C,4
0ba
r(–
40°F
…75
2°F
,580
PS
I)
Min
imal
data
requ
irem
ents
Rig
oro
usd
ata
req
uire
me
nts
Seal Selection By Media GroupsDefault Option, if specified
Not Applicable
Configuration
1CW
-FX
2CW
-CW
2N
C-C
S
3CW
-FB
3N
C-B
B
2C
W-C
S
2N
C-C
S
3C
W-B
B
3C
W-F
F
3N
C-F
B
3N
C-B
B
3NC
-FF
Flexible element rot. rot. rot. rot. rot. rot. stat. rot.stat.rot. rot. rot. stat. rot. stat. stat. rot. stat.
Mechanical seals
Temperature Pressure range<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■
<20 bar (290 PSI) □ □ ■ □ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■
<20 (300) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■
<20 bar (290 PSI) □ ■ ■ ■ □ □ ■ ■ □ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) □ □ ■ ■ □ ■ ■ ■ ■
<80ºC (176 ºF) <20 bar (290 PSI) □ □ ■ □ □ □ □ □ □ ■ ■ ■ ■ ■
<20 bar (290 PSI) □ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■
<20 bar (290 PSI) □ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■<20 bar (290 PSI) ES
1)ES
1)ES
1)ES
1)ES
1)ES
1)ES
1)ES
1)ES
1)ES
1)ES
1) ES ES ES
20…40 bar (290…580 PSI) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES ES
<20 bar (290 PSI)20…40 bar (290…580 PSI)<20 bar (290 PSI) □ ■ □ ■ ■ ■ ■ ■ ■ ■ □ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■<20 bar (290 PSI) □ ■ □ ■ ■ ■ ■ ■ ■ ■ □ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■
<20 bar (290 PSI) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES1) ES ES ES
20…40 bar (290…580 PSI) ES1)
ES1)
ES1)
ES1)
ES1)
ES1)
ES1) ES ES
<20 bar (290 PSI)20…40 bar (290…580 PSI)
1C
W-F
L
Arrangement
2 and 3
CT
X-A
PI-
DN
CT
X-A
PI-
SN
SB
-D
CT
X-A
PI-
DN
GS
PH
-KD
B75
0V
N
SB
B75
0V
K-T
a
176 ºC...260 ºC(349 ºF...500 ºF)
≥80ºC (176 ºF)
<80ºC (176 ºF)
<80ºC (176 ºF)
-40 ºC…-5 ºC(-40 ºF...23 ºF)
-5 ºC...176ºC(23 ºF...500 ºF)
176 ºC...260 ºC(349 ºF...500 ºF)
260 ºC...400 ºC(500 ºF...752 ºF)
Optional
Seal type
Engineered Seal (not required to meet design and testing requirements)
GS
PH
-Ta
GS
PH
-Ta
B75
0V
K-T
a
B75
0V
K-D
260 ºC...400 ºC(500 ºF...752 ºF)
No
n-f
lash
ing
H
ydro
carb
on
s
Seal type recommendation
Category
Fla
shin
gH
ydro
carb
on
s
Water
Sour water
Absolute vapourPressure less than1 bar (15 PSI ) at pumping temperature
(Refer to API 682 4th ed..Annex A,sheet 4)
Absolute vapourPressure above1 bar (15 PSI ) at pumping temperature
(Refer to API 682 4th ed..Annex A,sheet 5)
Sealmatic product information■ Suitable Sealmatic mechanical seal or applicable piping plan□ To be clarified with Sealmatic application expertES Engineered Seal based on reference type A,B or C,
ES1) Special feature: internal circulation device for plan 23, perfluoroelastomer secondary seals.
<80ºC (176 ºF)
-40 ºC…-5 ºC (-40 ºF...23 ºF)
-5 ºC...176ºC(23 ºF...500 ºF)
No
n-H
ydro
carb
on
s(r
efer
s to
AP
I 68
2 4t
h ed
, A
nnex
A,
shee
t 3)
Recommended standard seal
H2SO4 ≤ 20%, 25 ºC (77 ºF )H3SO4 ≤ 20%, 80 ºC (176 ºF )
Caustic, Amines, Crystalize
Media /Piping plan
A
B75
0V
K-G
SP
H
2CW
-CW
SB
-Ta
3CW
-FB
GS
PH
-KD
SB
-Ta
31 2 3 1 2
1
Seal Selection By Media GroupsDefault Option, if specified
Not Applicable
Configuration
1CW
-FL
2CW
-CW
3CW
-FB
3CW
-BB
3CW
-BB
3CW
-FF
Flexible element rot. rot. rot. rot. stat. rot. stat. rot. stat. rot. rot. stat.
Mechanical seals
Temperature Pressure range<20 bar (290 PSI) ■ ■ ■ ■
20…40 bar (290…580 PSI)
<20 bar (290 PSI) ES ES ES ES
20…40 bar (290…580 PSI)
<20 (300) ■ ■ ■ ■
20…40 bar (290…580 PSI)
<20 bar (290 PSI) □ ■ ■ ■20…40 bar (290…580 PSI)
<80ºC (176 ºF) <20 bar (290 PSI) □ □ □ □
<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■
20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ES ES ES ES ES ES ES ES ES ES ES ES20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ES ES ES ES ES ES ES ES20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■
20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES<20 bar (290 PSI) ■ ■ ■ ■ ■ ■ ■ ■20…40 bar (290…580 PSI) ES ES ES ES ES ES ES ES
Arrangement
2 and 3 2 and 3
UF
LW
T80
0-T
a
UF
L6
50-
Ta
UF
LW
T80
0-T
a
UF
L6
50-
Ta
UF
LW
T80
0-D
176 ºC...260 ºC(349 ºF...500 ºF)
≥80ºC (176 ºF)
<80ºC (176 ºF)
<80ºC (176 ºF)
-40 ºC…-5 ºC(-40 ºF...23 ºF)
-5 ºC...176ºC(23 ºF...500 ºF)
176 ºC...260 ºC(349 ºF...500 ºF)
260 ºC...400 ºC(500 ºF...752 ºF)
Optional
Seal type
Engineered Seal (not required to meet design and testing requirements)
260 ºC...400 ºC(500 ºF...752 ºF)
No
n-f
lash
ing
H
ydro
carb
on
s
Seal type recommendation
Category
Fla
shin
gH
ydro
carb
on
s
Water
Sour water
Absolute vapourPressure less than1 bar (15 PSI ) at pumping temperature
(Refer to API 682 4th ed..Annex A,sheet 4)
Absolute vapourPressure above1 bar (15 PSI ) at pumping temperature
(Refer to API 682 4th ed..Annex A,sheet 5)
Sealmatic product information■ Suitable Sealmatic mechanical seal or applicable piping plan□ To be clarified with Sealmatic application expertES Engineered Seal based on reference type A,B or C,
ES1) Special feature: internal circulation device for plan 23, perfluoroelastomer secondary seals.
<80ºC (176 ºF)
-40 ºC…-5 ºC (-40 ºF...23 ºF)-5 ºC...176ºC
(23 ºF...500 ºF)
No
n-H
ydro
carb
on
s(r
efer
s to
AP
I 68
2 4t
h ed
, A
nnex
A,
shee
t 3)
Recommended standard seal
H2SO4 ≤ 20%, 25 ºC (77 ºF )H3SO4 ≤ 20%, 80 ºC (176 ºF )
Caustic, Amines, Crystalize
Media /Piping plan
B C
1 2 3 1 2
UF
L8
50V
N
UF
L8
50V
N-T
a
UF
L8
50V
N-T
a
UF
L8
50V
N-D
UF
L6
50
UF
L6
50-
D
UF
LW
T80
0
2CW
-CW
3CW
-FB
1CW
-FL
3
Seal Coding SystemMechanical seal Design options Size Plans
Category Arrangement Type Containment Device Secondary Seal Material Face Material Shaft Size Piping Plan
123
123
ABC
Dual seal with different seal types in the inner and outerposition:
Inner type / Outer typee.g. B/A
PPlain gland for Arrangement 2 and 3
F FKM MCarbon vs Nickel Bound Tungsten Carbide
Three digits,rounded up to thenext whole millimeter
Examples45.00 mm: 04547.25 mm: 04848.63 mm: 048
XXX: Unspecified
Listed in numericalorder, separatedby a forward slash
LFloating throttle bushingfor Arrangement 1,Category 1, 2, 3
G PTFE NCarbon vs Reaction Bonded Silicon Carbide
FFixed throttle bushing for Arrangement 1, Category 1
H Nitrile O
Reaction Bonded Silicon Carbide vs Nickel Bound Tungsten Carbide
Pro
cess
Sid
e
Be
twee
n s
eals
Atm
os
ph
eri
c si
de
CContainment seal for 2CW-CS, 2NC-CS
I FFKM P
Reaction Bonded Silicon Carbide vs Reaction Bonded Silicon Carbide
S
Floating, segmentedcarbon bushing may be specified for Category 1,2, 3
R Flexible graphite QSintered Silicon Carbide vs sintered silicon carbide
01 51 61 9902 52 62
03 53A 65A
X Unspecified X Unspecified RCarbon vs Sintered Silicon Carbide
11 53B 65B
12 53C 66ADual seal with differentsecondary seal materialsat the inner and outerposition:
Inner material/Outer material
e.g. I/F
S
Graphite loaded, Reaction Bonded Silicon Carbide vs Reaction Bonded Silicon Carbide
13 54 66B
14 55
21 71
22 72
T
Graphite loaded, Sintered Silicon Carbide vs Sintered Silicon Carbide
23 74
31 75
32 76
41 72
X Unspecified
Dual seal with different face materials at the inner and outer position:Inner material/Outer materiale. g. P/N
ExampleMechanical Seal Design Options Size Plans
Category Arrangement Type Containment Device Secondary Seal Material Face Material Shaft Size Piping Plan
2 2 A P: Plain gland I: FFKM (Inner position)F: FKM (Outer position)
N: Carbon vs Reaction Bonded Silicon Carbide
050 02/52
Seal designation: 22A-PI/FN-050-02/52
API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.
Category Category 1
Configuration 1CW-FX 2CW-CW 2NC-CS 3CW-FB 3NC-BB
Mec
hani
cal S
eal
Seal Type A
Rota
ting
CTX-API-SN CTX-API-DN GSPH-Ta CTX-API-DN GSPH-KDSt
atio
nary
Category Category 2 and 3
Configuration 1CW-FL 2CW-CW 2CW-CS 2NC-CS 3CW-FB 3CW-BB 3CW-FF 3NC-FB 3NC-BB 3NC-FF
Mec
hani
cal S
eal
Seal Type A
Rota
ting
B750VN B750VK B750VK-
GSPH GSPH-Ta B750VK B750VK-D GSPH-KD
Stat
iona
ry
SB SB-Ta SB-Ta SB-D
Seal Type B
Rota
ting
UFL850 UFL850-Ta UFL850-Ta UFL850-D
Seal Type C
Rota
ting
UFLWT800 UFLWT800-Ta UFLWT800-Ta UFLWT800-D
Stat
iona
ry
UFL650 UFL650-Ta UFL650-Ta UFL650-D
API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.
API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.
Category Category 1Configuration 1CW-FX 2CW-CW 2NC-CS 3CW-FB 3NC-BB
API P
IPIN
G P
LAN
SPlan 01
PRO
CESS
SID
E
Plan 02 Plan 03
Plan 11 (12) Plan 13 Plan 14
Plan 21 (22) ∆
Plan 23
Plan 31 ∆
Plan 41 ∆
Plan 32 ∆
Plan 52
BETW
EEN
SEA
LS
Plan 55
Plan 53A Plan 53B Plan 53C Plan 54
Plan 72 (71) Plan 74 Plan 75
Plan 76
Recommended ∆ Possible
Category Category 1
Configuration 1CW-FX 2CW-CW 2NC-CS 3CW-FB 3NC-BB
API P
IPIN
G P
LAN
S
Plan 51
ATM
OSP
HER
IC S
IDE ∆
Plan 62 (61) ∆
Plan 65A ∆ ∆
Plan 65B ∆ ∆
Plan 66A
Plan 66B
Plan 99
Recommended ∆ Possible
API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.
Recommended ∆ Possible
Category Category 2 and 3
Configuration 1CW-FL 2CW-CW 2CW-CS 2NC-CS 3CW-FB 3CW-BB 3CW-FF 3NC-FB 3NC-BB 3NC-FF
API
PIP
ING
PLA
NS
Plan 01
PRO
CESS
SID
E
∆ ∆ ∆
Plan 02
Plan 03
Plan 11 (12) ∆ ∆ ∆ ∆ ∆
Plan 13 ∆ ∆
Plan 14 ∆ ∆
Plan 21 (22) ∆ ∆ ∆ ∆ ∆
Plan 23
Plan 31 ∆ ∆ ∆
Plan 41 ∆ ∆ ∆
Plan 32 ∆ ∆ ∆
API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.
Category Category 2 and 3Configuration 1CW-FL 2CW-CW 2CW-CS 2NC-CS 3CW-FB 3CW-BB 3CW-FF 3NC-FB 3NC-BB 3NC-FF
API P
IPIN
G P
LAN
S
Plan 52
Plan 55
Plan 53A
BETW
EEN
SEA
LS
Plan 53B
Plan 53C
Plan 54
Plan 72 (71)
Plan 74
Plan 75
Plan 76
Plan 51
ATM
OSP
HER
IC S
IDE
Plan 62 (61) ∆ ∆ ∆ ∆
Plan 65A ∆ ∆ ∆ ∆
Plan 65B ∆ ∆ ∆ ∆
Plan 66A
Plan 66B
Plan 99
Recommended ∆ Possible
API 682 4th Edition Solutions At A GlanceSealmatic Product Locator For Mechanical Seals And Seal Supply Systems.
API Piping PlansInstrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
PROCESS SIDE
Plan 01 Plan 12
Integral (internal) recirculation from the pump discharge to seal chamber.
Recirculation from the pump discharge through a strainer and a flow control orifice into the seal chamber.
Recirculation from pump discharge through a strainer, a flow control orifice and a cooler into the seal chamber.
Plan 22
API Piping Plans
PROCESS SIDE
Recirculation from the seal chamber through a flow control orifice and back to the pump suction or pump suction piping.
Recirculation from a circulation device in the seal chamber through a cooler and back into the seal chamber.
Dead-ended seal chamber with no recirculation of flushed fluid. Flush connections plugged.
Plan 23Plan 13Plan 02
Instrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
API Piping Plans
PROCESS SIDE
Instrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 03 Plan 14 Plan 31
Recirculation from the pump discharge through a cyclone separator delivering the clean fluid to the seal chamber. The solids are delivered to the pump suction line.
Recirculation from pump discharge through a flow control orifice to the seal and simultaneously from the seal chamber through a flow control orifice to pump suction.
Circulation between the seal chamber and the pump created by the design of the seal chamber. Flush connections plugged.
API Piping Plans
PROCESS SIDE
Instrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 11 Plan 21 Plan 41
Recirculation from the pump discharge through a cyclone separator delivering the clean fluid to a cooler and then to the seal chamber. The solids are delivered to the pump suction line.
Recirculation from pump dischargethrough a flow control orifice and coolerinto the seal chamber.
Recirculation from the pump dischargethrough a flow control orifice into the sealchamber.
API Piping Plans
PROCESS SIDE
Instrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 32
Injection of clean fluid into the sealchamber from an external source.
API Piping Plans
BETWEEN SEALS
Instrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Reservoir providing buffer liquid for theouter seal of an arrangement 2unpressurized dual seal. The buffer liquid
Plan 52 Plan 53C
Recirculation from pump dischargethrough a flow control orifice and coolerinto the seal chamber.
Plan 71
Tapped connections for the purchaser’s use e.g., for future use of buffer gas.
API Piping PlansInstrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 55
Unpressurized external buffer fluidsystem supplying clean buffer liquid forthe outer seal of an arrangement2 unpressurized dual seal. Buffer liquidis circulated by an external pump orpressure system.
Plan 54
Pressurized external barrier fluidsystem supplying clean liquid for anarrangement 3 pressurized dual seal.The barrier liquid is maintained at apressure greater than seal chamberpressure and is circulated by anexternal pump or pressure system.
Plan 74
Externally supplied barrier gas for arrangement 3 dual pressurized non-contacting gas seals (3NC-FB, 3NC-BB, 3NC-FF).
BETWEEN SEALS
API Piping PlansInstrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 53 A
Pressurized barrier fluid reservoirsupplying clean fluid for anarrangement 3 pressurized dual seal.
Plan 72
Externally supplied buffer gas forarrangement 2 unpressurized seals with adry running containment seal (2CW-CSand 2NC-CS). Buffer gas is maintained at apressure less than seal chamber pressure.The buffer gas pressure should notexceed 0.7 bar (10 PSI).
Plan 75
A containment seal chamber leakage collection system for condensing or mixed phase leakage on arrangement2 unpressurized seals with containment seals (2CW-CS and 2NC-CS).
BETWEEN SEALS
API Piping PlansInstrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 53 B
Barrier fluid system pressurized by abladder accumulator supplying cleanliquid for an arrangement 3 pressurizeddual seal.
Plan 76
A containment seal chamber drain for non-condensing leakage on arrangement 2 unpressurized seals with containment seals (2CW-CS and 2NC-CS). Used if the pumped fluid does not condense at ambient temperatures.
BETWEEN SEALS
API Piping Plans
ATMOSPHERIC SIDE
Plan 51
Reservoir providing a dead-ended blanketfor fluid to the quench connection of thegland plate. Only recommended forvertical pumps.
Plan 65A
Atmospheric leakage collection and alarmsystem for condensing leakage. Failure ofthe seal will be detected by an excessiveflow rate into the leakage collectionsystem.
Plan 66B
An orifice plug in the drain port minimizes the seal leakage leaving the seal gland and allows for detection of a seal failure by an alarm of the monitoring pressure transmitter.
Instrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
API Piping PlansInstrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 62
Quench stream from an external sourceto the atmospheric side of the seal faces.The quench stream can be low pressuresteam, nitrogen or clean water.
Plan 65B
Atmospheric leakage collection and detection system for condensing leakage. Failure of the seal will be detected by a cumulative leakage into the system.
ATMOSPHERIC SIDE
API Piping PlansInstrument symbols
FO Flow orifice
LI Level indicator
Equipment symbols
FIL
TI Temperature indicator
TIT
LIT HLA
PDIT LLA
PI NLL
PIT
Temperature transmitter with local indicator
Level transmitter with local indicator
High level alarm set point
Differential pressure transmitter with local indicator Low level alarm set point
Pressure indicator Normal liquid level
Bladder accumulator
Cyclone separator
Filter, coalescing
Flow orifice
Seal cooler
Pressure transmitter with local indicator
Strainer, Y
Valve, normally open
Valve, normally closed
Valve, check
Valve, needle
Valve, pressure control
Valve, pressure relief
Plan 61
Tapped and plugged atmospheric-sideconnections for purchaser’s use.
Throttle bushings in the seal gland minimize the seal leakage leaving the seal gland and allow for detection of a seal failure by an alarm of the monitoring pressure transmitter.
Plan 66APlan 99
Engineered piping plan not defined byother existing plans.
ATMOSPHERIC SIDE
SELECTION OF BARRIER / BUFFER MEDIASealed Fluid Barrier/Buffer Fluid Special Demands General Demands
Not Specified Hydrocarbon fluid
Most desirable viscositybetween 2 and 10 mm2/s (cSt)at operating temperature •Three years continuous operation without
adverse deterioration•Consider local regulations regarding exposurelimits and hazard classifications (see safety datasheet)
•Compatibility with the sealed medium•Compatibility with the materials of the sealingsystem
•Initial boiling point 28 °C (82 °F) above exposed temperature
•If oxygen is present: flash point > servicetemperature
•Compatibility with max./min. process temperature•Freezing temperature < min. ambienttemperature at site
•Viscosity <500 mm2/s at the minimumtemperature to which it is exposed (before start-up)
•Check viscosity over the entire operatingtemperature range
•Consider limited gas solubility of viscous fluids (>10 bar (145 PSI)), released gas may cause foaming and loss of lubrication
Hydrocarbon fluids for high operatingtemperatures sometimes have a muchhigher viscosity at ambient temperatures and require specialcaution during start-up
For hydrocarbon streams, mineraloil may degrade at temperaturesabove 70 °C (158 °F)
Aqueous Streams
Mixture of water andethylene glycol
Ethylene glycol can be considered ahazardous material and/or waste
Mixture of water andpropylene glycol
Do not use commercially availableautomotive antifreeze (plating ofadditives at seal parts)
HydrocarbonStreams
Paraffin-based highpurity oils
With little or no additive forwear/oxidation resistance(plating of additives at sealparts)
Synthetic-based oils–
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