CHESTERTON 186HT/ 886HT Single Bellows Seals ®
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ISO 9001 CERTIFIED
Proven performance in high temperature services Versatile slotted gland design Cartridge seal designed to fit standard pump bores Available for ANSI/ISO and API pump models Easily replaces OEM component seals
Reliable high temperature bellows seals for the most demanding services
CHESTERTON 186HT/ 886HT Single Bellows Seals ®
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Construction Details High temperature grafoil secondary seals
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Advanced bellows design for maximum cycle life
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Heat-treated AM350 bellows core
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Rotating bellows eliminates clogging
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Low expansion alloy
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Blister-resistant carbon
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Anti-coke throttle bushing
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Full featured gland with flush, quench/vent and drain
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Popular Configurations Chesterton’s superior bellows technology comes packaged in an array of seal configurations. ■ ■ ■ ■
186HT standard ANSI/ISO pump design 186HTX thin cross-section for small pump frames 186HTA designed for API pumps 886HT replaces OEM seals
Materials Universal, advanced seal materials for use in a broad range of high temperature sealing applications. ■ Blister-resistant antimony carbon ■ High heat transfer, chemically resistant silicon carbide ■ Heat-treated AM350 bellows core ■ Low expansion alloy face retainer ■ Optional heat treated Inconel 718 bellows for corrosive services ■ High temperature grafoil secondary seals
Greater Seal Reliability To achieve maximum bellows plate thickness while not compromising the bellows spring rate, Chesterton uses a twelve convolution bellows core, which means controlled spring rate, lower heat generation and greater seal reliability throughout the operating range. The industry standard is nine convolutions. ■ ■ ■ ■ ■ ■ ■
Low spring rate Low heat generation Reduced coking at the seal faces Minimized face load variations Provides consistent fluid film Less sensitive to installation tolerances Forgiving to variations in equipment tolerances
Controlled Spring Rate
To meet the challenges in the sealing industry, Chesterton now offers the proven, nesting ripple bellows design. With the nesting ripple design, all bellows plates are identical and contoured to permit nesting when compressed. Nesting distributes pressure uniformly across the span of the bellows plate. The end result is less stress and minimized weld fatigue. ■ ■ ■ ■
Higher pressure capability Maximum axial motion Compact bellows design Low stresses at the ID weld joints
SPRING RATE
Advanced Bellows Design
NUMBER OF CONVOLUTIONS
CHESTERTON
®
186HT STANDARD– Dimensional Data/Inch & Metric SHAFT SIZE
GLAND OD
A
B MAX 108 4.25 4.25 108 4.50 114 4.75 4.25 121 133 5.25 140 5.50 140 5.75 146 6.00 159 6.25 6.25 159 6.50 165 6.50 6.50 165 6.75
25mm 1.125 1.125-X 30mm 1.250 32mm 1.375 1.375-X 35mm 38mm 1.500 40mm 1.625 42mm 1.750 45mm 1.875 50mm 2.000 2.125 55mm 2.250 60mm 2.375 2.500 65mm 2.625
STUFFING API BOX BORE BOX BORE C MIN 48 2.00 1.88† 51 2.25 57 2.38 2.13†† 60 64 2.50 67 2.63 67 2.75 70 2.88 76 3.00 3.13 79 3.25 86 3.38 3.50 89 3.75
Ca* MIN 54 2.25 2.13 57 2.38 60 2.63 2.38 67 70 2.75 73 2.88 73 3.00 76 3.25 80 3.38 3.50 89 3.63 92 3.63 3.75 95 4.00
IB SEAL DIA
SB DEPTH
OB LENGTH
API OB LENGTH
BOLT CIRCLE BY BOLT SIZE
SLOT WIDTH
GLAND WIDTH
NPT
D MAX 46 1.94 0.81 49 2.17 55 2.30 2.06 58 61 2.42 65 2.55 65 2.67 68 2.80 74 2.92 3.05 77 3.19 84 3.31 3.44 87 3.63
E MIN 42 1.64 1.58 42 1.68 43 1.68 1.64 43 43 1.68 43 1.68 43 1.68 43 1.80 46 1.80 1.80 46 1.80 46 1.80 1.80 46 1.83
F MAX 49 1.92 1.92 49 1.92 49 1.99 1.92 50 50 1.99 50 1.99 50 1.99 50 2.05 52 2.05 2.05 52 2.05 54 2.11 2.11 54 2.11
Fa** MAX 52 2.05 2.05 52 2.05 52 2.11 2.05 54 54 2.11 54 2.11 54 2.11 54 2.17 55 2.17 2.17 55 2.17 57 2.24 2.24 57 2.24
G MIN 3/8" (10mm) 1/2" (12mm) 5/8" (16mm) 76 78 3.12 3.24 2.87 79 82 3.19 3.31 81 99 3.49 3.62 3.24 89 92 92 95 3.62 3.74 95 98 3.74 3.87 95 98 3.87 3.99 98 101 4.12 4.24 108 111 114 4.24 4.37 4.49 4.37 4.49 4.62 111 114 117 4.49 4.62 4.74 114 117 120 4.49 4.62 4.74 4.62 4.74 4.87 117 120 123 4.87 4.99 5.12
H MAX 13 0.50 0.44 13 0.50 13 0.56 0.44 14 14 0.56 14 0.56 14 0.56 14 0.56 18 0.69 0.69 18 0.69 18 0.69 0.69 18 0.69
J MAX 32 1.26 1.26 32 1.26 32 1.32 1.26 34 34 1.32 34 1.32 34 1.32 34 1.38 35 1.38 1.38 35 1.38 37 1.45 1.45 37 1.45
3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 3/8 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
BOLT CIRCLE BY BOLT SIZE
SLOT WIDTH
GLAND WIDTH
NPT
H MAX 0.44 0.69 0.56 0.69 0.69 0.56
J MAX 1.32 1.32 1.81 1.38 1.45 1.45
1/2 1/2 1/2 1/2 1/2 1/2
186HTOS OVERSIZE– Dimensional Data/Inch SHAFT SIZE
GLAND OD
A
B MAX 5.25 6.50 6.00 7.25 8.00 7.00
1.375 1.750 1.875 2.125 2.500 2.625
STUFFING API BOX BORE BOX BORE C MIN 2.88 3.50 3.63 3.88 4.75 4.63
Ca* MIN 3.00 3.63 3.75 4.00 4.88 4.75
IB SEAL DIA
SB DEPTH
OB LENGTH
API OB LENGTH
D MAX 2.30 2.67 2.80 3.05 3.44 3.63
E MIN 1.68 1.68 1.38 1.80 1.80 1.83
F MAX 1.99 1.99 2.47 2.05 2.11 2.11
Fa** MAX 2.11 2.11 2.60 2.17 2.24 2.24
* Minimum Bore Diameter Ca for ID Pilot ** OB Length Fa with Pilot design and metallic face gasket
3/8" 3.92 4.92 4.79 4.92 6.42 5.79
G MIN 1/2" 5.04 4.92 5.04 6.54 5.92
5/8" 5.17 5.17 6.67
† Note: Bore to be opened from 1.750 => 1.875 for Durco MK II & III Gr I Pumps †† Note: Bore to be opened from 2.000 => 2.125 for Goulds 3196 ST Pumps
186HT/886HT Specifications E
J
F
186HT Standard ANSI B H
C D A Ca
G Fa
186HT API
STANDARD MATERIALS Rotary Faces: ■ Blister-resistant Carbon ■ Tungsten Carbide Stationary Faces: ■ Sintered Silicon Carbide Major Metal Parts: ■ 316SS Bellows: ■ AM350 heat-treated ■ 718 Inconel heat-treated (corrosive services) End Fittings: ■ Low expansion alloy 42 Secondary Seals: ■ Grafoil packing OPERATING LIMITS Speed Limits: ■ To 4000 fpm (20 mps) Temperature Limits: ■ -100°F to 800°F (-73°C to 427°C)
CHESTERTON 886HT Single Component Bellows Seals ®
886HT ROTARY ASSEMBLY – Dimensional Data/Inch SHAFT SIZE
OUTSIDE DIA
886HT ROTARY ASSEMBLY – Dimensional Data/Metric
OPERATING SCREW HEAD LENGTH PROTRUSION
SHAFT SIZE
OUTSIDE DIA
OPERATING SCREW HEAD LENGTH PROTRUSION
A
B
C
D
A
B
C
D
1.000 1.125 1.250 1.375 1.500 1.625 1.750 1.875 2.000 2.125 2.250 2.375 2.500 2.625
1.562 1.687 1.812 1.937 2.170 2.295 2.420 2.545 2.670 2.795 2.920 3.045 3.187 3.312
1.687 1.562 1.562 1.750 1.750 1.750 1.750 1.750 1.750 1.750 1.875 1.875 1.875 1.875
.125 .125 .125 .125 .164 .164 .164 .164 .164 .164 .164 .164 .164 .164
25mm 28mm 30mm 32mm 35mm 38mm 40mm 42mm 45mm 48mm 50mm 55mm 60mm 65mm
39.7 42.8 46.0 46.0 49.2 55.1 58.3 61.5 62.3 64.6 67.8 74.2 77.3 84.1
42.8 39.7 42.8 42.8 44.5 44.5 44.5 44.5 44.5 44.5 44.5 47.6 47.6 47.6
3.2 3.2 3.2 3.2 3.2 4.2 4.2 4.2 4.2 4.2 4.2 4.2 4.2 4.2
C D
B A
886HT STATIONARY ASSEMBLY – Dimensional Data/Inch & Metric SHAFT SIZE
STAT. BORE DIA
STAT. LENGTH
CAVITY STEP DIA
CAVITY DEPTH
BORE DEPTH
CAVITY STEP DEPTH
NOSE LENGTH
PIN EXTRUSION
A
B
C
D
E
F
G
H
J
25mm 1.000 28mm 1.125 30/32mm 1.250 35mm 1.375 38mm 1.500 40mm 1.625 42mm 1.750 45mm 1.875 48mm 2.000 50mm 2.125 55mm 2.250 60mm 2.375 2.500 65mm 2.625
41.2 1.625 44.4 1.750 47.6 1.875 50.8 2.000 53.9 2.125 60.3 2.375 63.5 2.500 66.6 2.625 69.8 2.750 76.2 3.000 79.3 3.125 82.5 3.250 3.375 85.7 3.375
11.1 .437 11.1 .437 11.1 .437 11.1 .437 11.1 .437 12.7 .500 12.7 .500 12.7 .500 12.7 .500 14.2 .562 14.2 .562 14.2 .562 .562 15.8 .625
35.1 1.384 38.3 1.509 41.5 1.634 44.6 1.759 47.8 1.884 54.2 2.134 57.3 2.259 60.5 2.384 63.7 2.509 70.0 2.759 73.2 2.884 76.4 3.009 3.134 79.6 3.134
14.0 .551 14.0 .551 14.0 .551 14.0 .551 14.0 .551 15.0 .592 15.0 .592 15.0 .592 15.0 .592 16.2 .641 16.2 .641 16.2 .641 .641 17.3 .682
9.9 .390 9.9 .390 9.9 .390 9.9 .390 9.9 .390 10.9 .431 10.9 .431 10.9 .431 10.9 .431 12.1 .480 12.1 .480 12.1 .480 .480 13.2 .521
6.1 .240 6.1 .240 6.1 .240 6.1 .240 6.1 .240 6.3 .251 6.3 .251 6.3 .251 6.3 .251 7.6 .300 7.6 .300 7.6 .300 .300 8.6 .341
6.6 .261 6.6 .261 6.6 .261 6.6 .261 6.6 .261 7.9 .314 7.9 .314 7.9 .314 7.9 .314 8.7 .346 8.7 .346 8.7 .346 .346 9.6 .379
3.1 .125 3.1 .125 3.1 .125 3.1 .125 3.1 .125 3.1 .125 3.1 .125 3.1 .125 3.1 .125 3.9 .156 3.9 .156 3.9 .156 .156 4.3 .170
E F G 3/32 PIN
15° B
D A
H J C
DISTRIBUTED BY:
Middlesex Industrial Park, 225 Fallon Road Stoneham, Massachusetts 02180 -9101 USA Telephone: 978-469-6446 Fax: 978-469-6594 www.chesterton.com © A. W. CHESTERTON CO., 2002. All rights reserved. ® Registered trademark owned and licensed by A. W. CHESTERTON CO. in USA and other countries.
FORM NO. 073038 REV. 1
PRINTED IN USA 06/02