JOHN CRANE SEAL IDENTIFICATION CODING To assist our customers in identifying John Crane products, John Crane Inc has developed a “Seal Identification Coding” schema, which uniquely defines the major components of the seal specific to their materials of construction. In so doing this allows for easy identification of products to application requirements. It should be noted that the seal identification identification coding schema is not designed to identify every component of the seal but only those comp onents critical to a successful sealing applications. Over the years the John Crane “Seal Identification Coding” schema has been enhanced and expanded to accommodate new products and improve understanding. understanding. Under that context this document is offered to explain and clarify the John Crane Inc. “Seal Identification Coding” schema. The new John Crane “Seal Identification Coding” schema consists of seven (7) fields. Each field defines a major seal component or grouping of components. Position of these fields is critical to seal identification. Therefore, the “Seal Identification Coding” schema is a positional coding schema. Each field is defined by a position and given a naming convention of 1st Symbol through 7th Symbol. Alpha, numeric or alpha–numeric alpha–numeric coding symbols have been established established st th to define the primary materials supplied for John Crane mechanical seal products. Fields 1 Symbol through 6 Symbol are populated using the appropriate material coding symbol for the component or grouping of components defined by the field which are supplied as part of the product. To maintain this positional coding schema a dash “-” is inserted into any position in which the item defined by that position is not supplied as part of the mechanical seal. A listing of the most popular material coding symbols is provided within this documentation. It should be noted that this coding schema is used to define mechanical seal assemblies only and does not extend to other John Crane products. It is used to define various mechanical mechanical seal related assemblies such as mating ring assemblies, hardware assemblies, seal head assemblies and seal assemblies. Mating ring assemblies, probably being the simplest, consist of the mating ring with its secondary sealing element(s). Hardware assemblies are typically a grouping of the seal assembly hardware items. Seal head assemblies are the seal heads themselves less mating ring assemblies and less equipment adaptive hardware. Seal assemblies typically fall into two categories. Either the seal head assembly complete with an applicable mating ring assembly or complete seals that include the seal head assembly, mating ring assembly and equipment adaptive hardware. The later includes complete seal assemblies, cartridge seal assemblies and package seal assemblies. Though equipment adaptive hardware items such as gland plates, sleeves and collars may be included with the product, this coding schema does not define the equipment adaptive hardware. For double, dual and tandem seal arrangements the seal closest to or in the product being handled is defined as the inboard seal inboard seal assembly while the seal farthest from the product is defined as the outboard the outboard seal seal assembly. Single seals will have one set of information while double, dual and tandem seals will reflect two sets of information one for each seal. Two sets of materials should be shown even if the inboard and outboard materials are identical. In the pictorial st th representation representation each field is labeled 1 Symbol through the 7 Symbol. A further definition of the field and its use is provided provided here.
1st Symbol The first symbol defines the secondary seal used in conjunction with the seal head assembly primary ring. The symbol used defines the sealing element only. Anti-extrusion rings, support rings, cove ring, shields, etc. are NOT defined by this code. The bellows for metal bellows seals traditionally defined in this position has been moved to the sixth symbol, labeled Loading Device.
OLD METHOD
NEW METHOD
Type 8B1 with Fluorocarbon O-ring and Chemlon anti-extrusion ring
X/Q
X
Type 9 with Chemlon wedge and o-ring expander
Q/X
X
Type 20R with Glass-Filled Chemlon/Chemlon Chemlon/Chemlon Bellows
Q/V
V
1/O28
O28
Metal Bellows seal with Alloy 20 bellows and Cranelast O-ring
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JOHN CRANE SEAL IDENTIFICATION CODING 2nd Symbol The second symbol defines the seal primary ring material. Traditionally, most primary rings are made up of a single material. The primary ring-coding symbol defines either a family material or a very specific face material. As the primary ring is the primary sealing element of the seal, this symbol only concerns itself with the primary ring material. When the primary ring is an insert pressed into an adaptor, as in the case of metal bellows seals, the insert is the only component defined by this symbol. OLD METHOD
NEW METHOD
Type 1 with general carbon material
F50
F50
Type 670 metal bellows seal with tungsten carbide insert
D/1
D
Type 9 with carbon insert in 316 SS primary ring adaptor
316/F51
F51
3rd Symbol The third symbol defines the hardware items for the seal assembly. It does not include the equipment adaptive hardware such as glands, sleeves or collars used to fit the seal to the equipment. The term hardware relates to the major components of the seal assembly such as the retainer for type 1, 2, 21, 8 & 9 seals, drive sleeve for type 6 & 6A seals and front adapters for metal bellows seals. When the metallurgy of these items is not specific, such as “1” for stainless steel, the seventh field is used to clarify the specific grade of stainless. Reference field seven for further information.
Type 1 with stainless steel retainer and brass for all other items such as disc, drive band, spring holder Type 1 with all stainless steel metal parts Type 609 metal bellows seal with Hastelloy bellows, Alloy 42 front adapter, 347 SS back adapter
OLD METHOD
NEW METHOD
1/2
1
1
1
H/1
O103
4th Symbol The fourth symbol defines the secondary sealing element used in conjunction with the mating ring. As with the first field, it defines only the sealing element. PTFE cove rings, anti-extrusion rings, etc. are NOT defined by this code. O-rings, gaskets, spiral-wound gaskets, Cranefoil rings and rubber cups are examples of mating ring secondary sealing elements. Clamped-in mating rings traditionally use two gaskets of different materials. Only the gasket in contact with the product is to be defined.
Cove o-ring mating ring with Chemlon cove ring and Fluorocarbon o-ring Clamped mating ring with one Chemlon and one fiber gasket Floating mating ring with Cranefoil ring
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OLD METHOD
NEW METHOD
X/Q
X
Q/O43
Q
O50
O50
JOHN CRANE SEAL IDENTIFICATION CODING 5th Symbol The fifth symbol defines the material for the mating ring. The same rules apply as with the primary ring.
6th Symbol The sixth symbol defines the material of the loading device. This is typically the spring for most traditional seals, with the exception of metal bellows seals in which the bellows acts as both a sealing element and a loading device. Since metal bellows seals incorporate a secondary sealing element such as a metal wedge, Cranefoil ring or o-ring to seal the shaft and because the bellows acts as the primary loading device, it has been moved to this field.
Type 9 seal with Hastelloy C springs Type 609 metal bellows seal with Hastelloy bellows
OLD METHOD
NEW METHOD
HC
H
-
H
7th Symbol rd
th
Defines more specifically the metallurgy used for the hardware items (3 symbol) and the loading device (6 symbol). This information is required as the codes used for these fields are generic. Therefore, because they are not specific, they must be further defined to distinguish the specific material grades. For example “1” defines stainless steel, however there are multiple stainless steel grades that can be used such as 304 SS, 18-8 SS, 302 SS, 316 SS. The same is true for “H”, which is used for Hastelloy. Here too, there are multiple grades of Hastelloy such as Hastelloy C-276, Hastelloy B & th Hastelloy G. To insure consistency of metallurgy, both positions must be defined with this 7 symbol. The two metallurgy rd definitions are separated by a slash (/) as shown below. If the seal is not supplied with a component defined by the 3 th th and/or 6 position, a dash (-) shall be inserted in the 7 field position for the absent component. Listed below is an example of this case. A listing of the most popular metallurgies and the associated abbreviation is provided within this documentation
Type 1 seal with 316 SS spring and brass hardware Type ECS metal bellows seal with Alloy 42 front adapter, AM-350 bellows, 347 SS back adapter Type 9 seal with Hastelloy C retainer and springs Type 37FS seal with 316 SS hardware and no springs
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OLD METHOD
NEW METHOD
2-1
BRASS/316
42/350/347
A42/350
HC/HC
HC/HC
316
316/-
JOHN CRANE SEAL IDENTIFICATION CODING Code Sequences John Crane Seal Identification Codes designate the primary component materials used in seal manufacturing. The sequential order of the code numbers and letters has specific meaning.
1st Symbol Primary Ring Secondary Seal
2nd Symbol
Primary Ring
3rd Symbol
4th Symbol
Hardware
Mating Ring Secondary Seal
5th Symbol
6th Symbol
7th Symbol
Mating Ring
Loading Device
Metallurgy
PUSHER TYPE SEALS
Q
Code in sequential order:
F51
1
Q
C
1
316/316
QF511QC1 316/316
Simply written:
1
Q F51
Q
1
C
NON-PUSHER TYPE SEALS Code in sequential order: Simply written:
B
F50
2
B
7
1 BRASS/18-8
BF502B71 BRASS/18-8 B
2
1
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B
F50
7
JOHN CRANE SEAL IDENTIFICATION CODING
PUSHER TYPE SEALS Code in sequential order: Simply written:
X
F31
1
Q
7
H
A20/HC
XF311Q7H A20/HC
X
1
Q
O8
O104
7
F31
METAL BELLOWS TYPE SEALS Code in sequential order: Simply written:
X
F3
O42
X
17-4/350
XF3O42XO8O104 17-4/350 O42
X
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O104
X
F3
O8
JOHN CRANE SEAL IDENTIFICATION CODING Special Notations Parentheses ( ) nd
th
When used in connection with the 2 and 5 symbols for primary rings and mating rings, parentheses indicate that the primary ring or mating ring has a coating or coated face. The symbol inside the parentheses indicates the base material.
XF511X(1)H 316/HC 316 SS MATING RING WITH A COATING OR COATED FACE
Subscript Numbers or Index Numbers When used together with the general material symbol, subscript numbers designate a more specific material classification. F51 O10 B2
A specific carbon family grade engineered for a defined service application. A ceramic material with a high level of purity. A specific nitrile (Buna-N) material that meets UL approvals.
Since most electronic business systems do not support subscripts they are simply typed as standard text. i.e. F51, O10, B2, etc.
Slash Line “/” th
Commonly used today in connection with the 7 symbol to segregate rd the materials of the seal hardware 3 symbol verses the material th for the loading device 6 symbol. The loading device for most mechanical seals will be the spring(s). For metal bellows seals the loading device is defined as the bellows. Additionally, even if a more standard th material is supplied such as brass (2), it is still defined in this 7 symbol as (BRASS/316).
Dash A dash inserted in place of any material code indicates the absence of that specific component for the item being supplied. If the hardware or loading device is not supplied, a dash (-) is used in it’s place in the th 7 symbol as well.
XF511XO58H 316/HC SEAL HARDWARE ITEMS IN 316 S.S WITH A HASTELLOY “C” SPRING
XF511--1 316/316 CODE FOR A SEAL SUPPLIED WITHOUT A MATING RING AND SECONDARY SEAL
O78O921O78O92- 316/SEAL HARDWARE ITEMS IN 316 S.S
Notation for Multiple Seals A notation identifying the inboard verses the outboard seal codes would be found to the right of the codes in parentheses. Circulating buffer liquids will be shown elsewhere on the seal layout drawing.
Note: The above symbols have specific meanings. Incorrect use of a symbol may change the meaning of the entire code.
Page 6 of 9 Revised 06-03- 2003
WITH NO SPRING
JOHN CRANE SEAL IDENTIFICATION CODING Pictorial Description of a John Crane Material Code
1ST SYMBOL
2ND SYMBOL
SECONDARY
PRIMARY RING
SEAL FOR PRIMARY RING Bellows
Types 1 & 2
Types 1, 2 & 21
3RD SYMBOL
4TH SYMBOL
HARDWARE
SECONDARY SEAL FOR MATING RING
Types 1, 2 & 21
O-ring
Types 8 & 48
Type 8
Types 8 & 9
Wedge
Type9
Type 48
Metal Bellows Seals
Type 21
Type 9
Bellows
Compression Rings
Type 37
O-ring
Mating Ring Gaskets
5TH SYMBOL MATING RING O-ring
Square Section
Floating
Cup-Mounted
Clamped-In
Metal Bellows Insert
Modified Clamped-In PTFEBellows
Type 20
Metal Bellows Wedge
O-ring
Pinned O-ring
Grafoil Ring
NOTE: SEAL EQUIPMENT ADAPTIVE HARDWARE, SUCH AS GLANDS, SLEEVES, COLLARS, PINS, SCREWS, ETC., ARE NOT DEFINED BY THIS CODE SYSTEM. Gland Plate
Page 7 of 9 Revised 06-03- 2003
Sleeve & Collar
Collars, Rings, Pins, Screws
6TH SYMBOL LOADING DEVICE Multiple Coil
Single Coil
Single Wave
Multiple Wave
Double Metal Bellows
Welded Metal Bellows
Formed Metal Bellows
JOHN CRANE SEAL IDENTIFICATION CODING COMMON SYMBOLS
SYMBOL B B93 C D D95 D96 F F3 F5 F6 F12 F28 F31 F32 F35 F40 F48 F50 F51 F55 F60 F77 H J M N O O8 O10 O15 O28 O31 O35 O37 O39 O40 O42 O43 O50 O54 O55 O58 O60 O72 O78 O92 O95 O103 O104 P90
MATERIAL BUNA–N LOW TEMPERATURE BUNA–N CERAMIC TUNGSTEN CARBIDE w/COBALT BINDER SILICON CARBIDE w/GRAPHITE SILICON CARBIDE w/GRAPHITE CARBON CARBON HEAT TRANSFER CARBON NUCLEAR CARBON FOOD CARBON HOT WATER CARBON GAS SEAL CARBON CHEMICAL CARBON DRY-RUNNING CARBON REFRIGERATION CARBON AUTOMOTIVE CARBON HP HYDROCARBON CARBON COMMERCIAL CARBON GENERAL CARBON SEVERE DUTY CARBON LIGHT DUTY GAS SEAL CARBON DRY-RUNNING HASTELLOY SILICONE MONEL NEOPRENE SPECIAL MATERIALS REACTION BONDED SILICON CARBIDE HIGH PURITY CERAMIC TUNGSTEN CARBIDE w/NICKEL BINDER CRANELAST* (EPDM) TUNGSTEN CARBIDE DAIRY BRONZE TITANIUM CRANEFOIL* CRANELAST* NUCLEAR SERVICE 17-4 PH STYLE 888 SHEET PACKING WIRE REINFORCED CRANEFOIL* CRANELAST* FOOD SERVICE TFE ENCAPSULATED VITON** SELF-SINTERED SILICON CARBIDE SPIRAL WOUND GASKETS ALLOY 718 EPDM SILICON CARBIDE w/GRAPHITE FAMILY REACTION BONDED SILICON CARBIDE ALLOY 42 AM-350 S.S. SILICONIZED GRAPHITE
SYMBOL Q S V X X51 X5 X48 X30 X28 X18 X14 1 2 3 4 5 6 7 8 9
MATERIAL CHEMLON* – TFE TOOL STEEL GLASS FILLED CHEMLON* - TFE VITON** OR EQUAL ISOLAST KALREZ** PERFLUOROELASTOMER FAMILY CHEMRAZ VITON** GAS SEAL SERVICE AFLAS KALREZ** STAINLESS STEEL BRASS PHOSPHOR BRONZE BRONZE, 83-7-7-3 HIGH LEAD BRONZE CAST IRON NI-RESIST PLATED STEEL STELLITE OR EQUAL
• JOHN CRANE, INC. COMPANY TRADENAME ** DUPONT TRADE NAM E + ALL SYMBOLS ARE FOR COMMERCIAL GRADE MATERIALS UNLESS OTHERWISE NOTED
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JOHN CRANE SEAL IDENTIFICATION CODING COMMON METALLURGIES – 7th FIELD SYMBOL
METALLU RGY
ABBREVIATION
O42
17-4 PH S.S.
17-4
1 1
17-7 PH S.S. 18-8 S.S
17-7 18-8
1
254 SMO
254
1
25-6MO
25-6
1
301 S.S.
301
1 1
302 S.S. 303 S.S.
302 303
1
304 S.S.
304
1
304L S.S.
304L
1
305 S.S.
305
1 1
316 S.S. 316L S.S.
316 316L
1
317 S.S.
317
1
317L S.S.
317L
1
347 S.S.
347
1 1
410 S.S. 420 S.S.
410 420
1
904L S.S.
904L
1
ALLOY 20CB3 S.S.
A20
O103
ALLOY 42
A42
1 O
ALLOY 611 ALUMINUM
611 ALMN
O104
AM-350 S.S.
350
1
AM-355 S.S.
355
2
BRASS
BRASS
4 1
BRONZE DUPLEX S.S.
BRNZ DPLX
1
FERRALIUM
FRLM
H
HASTELLOY B
HB
H
HASTELLOY B-3
HB3
H H
HASTELLOY C HASTELLOY C-22
HC HC22
H
HASTELLOY G-30
HG30
O93
INCONEL 600
600
1
INCONEL 625
625
O72 O65
INCONEL 718 INCONEL X-750
718 X-750
M
MONEL
MONEL
M
MONEL 400
M400
M
MONEL K-500
K500
O 8
NICKEL PLATED STEEL
NCKL STEEL
1
STAINLESS STEEL
SS
O
TANTALUM
TANTM
O37
TITANIUM
TITNM
O
ZIRCONIUM
ZIRNM
Page 9 of 9 Revised 06-03- 2003
