S-1/1B-A

1/1B

ELASTOMER BELLOWS SEAL

Applications
Type 1 seals are specified in more original equipment than any other seal from any manufacturer. They have the highest success rate of any seal of their type, and are suitable for a wide range of service conditions: from water to steam to chemicals and corrosive materials.
s

Non-Concurrent Operating Conditions

s

1/1B

Temperatures: - 40C to + 205C/ - 40F to + 400F (depending on materials used) Pressures: 1: 29 bar g/ 425 psig 1B: 82 bar g/ 1200 psig See Chart 8 for speed requirements

For use in pumps, mixers, blenders, agitators, refrigeration compressors, blowers, fans and other rotary shaft equipment. For pulp and paper, petrochemical, food processing, wastewater treatment, chemical processing, power generation and other demanding applications. Both Type 1 and 1B can be repaired in the field to minimize replacement cost, downtime and lost revenue.

Speeds:

INCH RANGE

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ELASTOMER BELLOWS SEAL

Design Features
Mechanical Drive The drive bands notch design eliminates over-stressing of the elastomer bellows. Bellows slip is eliminated. The shaft and sleeve are protected from wear. Self-Aligning Automatic adjustment compensates for abnormal shaft end play run out, primary ring wear and equipment tolerances. Special Balancing For higher pressure applications, greater operating speeds and less wear.

Non-Clogging, Single Coil Spring Provides greater dependability than multiple spring designs. Will not be affected by build-up of solids.

Low Drive Torque The design of the seal and material selection creates a low level of breakout torque which improves performance and reliability for fractional horsepower motors.

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ELASTOMER BELLOWS SEAL

Ty p i c a l A r r a n g e m e n t / D i m e n s i o n a l D a t a Ty p e 1

D4 MIN. BORE

D3 SEAL O.D.

1/32" MIN. L5 .031"

L38

L3 .031"

D1 .002" SHAFT DIA.

Type 1 with Spring Adapter

Set Screw Collar Option

C h a r t 1 . Ty p e 1 D i m e n s i o n a l D a t a (Inches)
Seal Size (inches) 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 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 D1 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 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 D3 1.500 1.625 1.812 1.875 2.000 2.250 2.375 2.500 2.625 2.812 2.937 3.062 3.187 3.375 3.500 3.625 3.750 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 D4 1.750 1.875 2.000 2.125 2.250 2.500 2.625 2.750 2.937 3.125 3.250 3.375 3.500 3.750 3.875 4.000 4.187 4.437 4.562 4.687 4.812 4.937 5.062 5.187 5.312 L3 1.562 1.625 1.625 1.687 1.687 2.000 2.000 2.125 2.125 2.375 2.375 2.500 2.500 2.750 2.750 2.875 2.875 3.125 3.125 3.125 3.125 3.250 3.250 3.375 3.375 L5 1.687 1.750 1.750 1.750 1.750 2.000 2.000 2.125 2.125 2.375 2.375 2.500 2.500 2.750 2.750 2.875 2.875 3.125 3.125 3.125 3.125 3.250 3.250 3.375 3.375 L38 .375 .375 .375 .375 .375 .375 .375 .375 .375 .500 .500 .500 .500 .500 .500 .500 .500 .500 .500 .500 .500 .562 .562 .562 .562

C h a r t 2 . Ty p e 1 B D i m e n s i o n a l D a t a (Inches)
Seal Size (inches) 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 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 D1 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 2.750 2.875 3.000 3.125 3.250 3.375 3.500 3.625 3.750 3.875 4.000 D3 1.500 1.625 1.812 1.875 2.000 2.250 2.375 2.500 2.625 2.812 2.937 3.062 3.187 3.375 3.500 3.625 3.750 4.000 4.125 4.250 4.375 4.500 4.625 4.750 4.875 D4 1.750 1.875 2.062 2.125 2.250 2.500 2.625 2.750 2.937 3.125 3.250 3.375 3.500 3.750 3.875 4.000 4.187 4.437 4.562 4.687 4.812 4.937 5.062 5.187 5.312 L3 1.875 1.937 1.937 2.000 2.000 2.375 2.375 2.500 2.500 2.750 2.750 2.875 2.875 3.125 3.125 3.250 3.250 3.500 3.500 3.500 3.500 3.625 3.625 3.750 3.750 L65 .343 .343 .343 .343 .343 .437 .437 .437 .437 .500 .500 .500 .500 .562 .562 .562 .562 .625 .625 .625 .625 .625 .625 .625 .625

Ty p e 1 B
.125"

D4 MIN. BORE

D3 SEAL O.D. L65 D1 .002" SHAFT DIA.

High Pressure Mating Ring Support

20 For ease of installation, the leadin edge of shaft or sleeve should be chamfered as shown.

L3 .031"

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ELASTOMER BELLOWS SEAL

Chart 3. Pressure/Velocity (PV) Limits
A. Lubricating Liquids
Pressure (psig) 1200 1100 1000 900 800 700 600 500 400 300 200 100 Pressure (bar g) 83 76 69 62 58 48 41 34 28 21 14 7 0 0 1 25 2 50 3 75 Seal Size 4 100 5 125 6 150 (inches) (mm) Pressure (psig) 1200 1100 1000 900 800 700 600 500 400 300 200 100

B. Non-Lubricating Liquids
Pressure (bar g) 83 76 69 62 58 48 41 34 28 21 14 7 0 0 1 25 2 50 3 75 Seal Size 4 100 5 125 6 150 (inches) (mm)

Type 1B - Carbon vs. Silicon Carbide 1800, 3600 rpm Type 1B - Carbon vs. Ceramic 1800 rpm Type 1B - Carbon vs. Ceramic 3600 rpm Type 1 - Carbon vs. Silicon Carbide 1800, 3600 rpm Type 1 - Carbon vs. Ceramic 1800 rpm Type 1 - Carbon vs. Ceramic 3600 rpm

To determine the maximum pressure for the size of Type 1 or 1B Seal required, multiply the maximum pressure from Charts 3A and 3B by the factors in Chart 4 to obtain the maximum operating pressure. 1. Lubricating liquid is defined as having lubricating properties of gasoline or better. Non-lubricating liquid is defined as having lubricating properties of water or worse. 2. Pressure capabilities to 83 bar g/1200 psig are based on lubricating oil service, carbon vs. silicon carbide, and high pressure mating ring support.

Chart 4. Multiplier Factors

Selection Considerations Speed Sealed Fluid Temperature Up to 3600 rpm Above 3600 rpm Below 79C/175F Above 79C to 121C/175F to 250F Above 121C to 177C/250F to 350F Above 177C/350F Multiplier Factor x 1.00 Example for Determining PV Limits: Seal: 76 mm/3 inches diameter Type 1B Product: Water Face material: Carbon vs. Ceramic Temperature: 93C/200F Shaft speed: 1800 rpm Using Chart 3B, the maximum pressure would be 440 psig/30 bar g. From table of multipliers (Chart 4), apply the multipliers for the specific service requirements to determine the maximum operating pressure for this application. 600 x 1 x .67 x 1 = 402 psig/28 bar g The maximum operating pressure of this 2 inch Type 1B seal is 396 psig. 440 x 0.9 = 396 psig/27 bar g

**
x 1.00 x 0.90 x 0.80 x 0.65

** Multiplier = 3600/new speed Example: If new speed = 4000 rpm, Multiplier = 3600/4000 = .90

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ELASTOMER BELLOWS SEAL

Chart 5. Hydrostatic Pressure Limits
Pressure (psig)
2000 Type 1B 120
Heavy Hydrocarbons

C h a r t 6 . B r e a k o u t ( S t a r t i n g ) To r q u e Consumption for Seal

+50 135 Water & Medium Hydrocarbons 120 100 80 60 40 20 0 1-50 90 80 70 60 50 40 30 20 10 0 0 4.0" 3.5" 3.0" 2.5" 2.0 Viscosity in cSt 1 6.0 5.0 3.0 4.0 Water 3.0 2.0 2-50 4.0 Medium Hydrocarbons +50 9.0 8.0 Heavy Hydrocarbons

Pressure (bar g)

1500 Type 1 1000

100 80 60 40 20

6.0 4.0

500 0 0 0 1 25 2 3 4 100 50 75 Seal Size

0 5 (Inches) 125 (mm)

Breakout Torque (ft/lbs)

1.0 2.0 1.0 2.0" 1.5" 1.0" 0 0 0 100 200 300 400 Power (HP) Required Fluid Pressure (psig) 1800 rpm

C h a r t 7 . E l a s t o m e r Te m p e r a t u r e L i m i t s
Compound Buna-N Fluoroelastomer Ethylene Propylene Neoprene (C) -100 40C to +107C 40F to + 225F 29C to + 205C 20F to + 400F 45C to +150C 49F to + 300F 40C to +100C 40F to + 212F (F) -50 0 50 100 150 200 250 Temperature 0 100 200 300 400 500

Chart 8.Speed Limits for Coil Springs

Speed (rpm) 6000 5000 4000 3000 2000 1000 0 (Inches) 0 1 2 3 4 Shaft Size 5 6
Standard spring Welded end coil spring Stationary seal head Welded end coil spring and adapter Welded end coil spring

Coil spring requirements for rotating Type 1 and 1B seal heads with standard stuffing box diameter.

Chart 9. Recommendations for Viscous Fluids

Special Seal Double Seal Hard Face Standard Seal

Chart 10. Criteria for Installation

Limits

50,000

15,000

1.000 to 3.125 dia. 63 Ra Surface Finish 3.125 dia. & up. 32 Ra

15,000 5,000 Values in SSU 3,000 1,000 Values in cSt

Out of Roundness (Shaft) Axial Float Allowance

0.05 mm/ 0.002 0.13mm/ 0.005

cSt = Centistokes (cSt x 4.62 = ssu) SSU = Saybolt Seconds Universal

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ELASTOMER BELLOWS SEAL

Chart 11. Material of Construction
Seal Component Materials Secondary Sealing Element Bellows Secondary Sealing Element for Mating Rings Primary Ring Hardware Retainer, Disc, Drive Band, Spring Holder 316 Stainless Steel Mating Ring Mechanical Loading Device Springs 316 Stainless Steel

Materials

Buna-N Fluoroelastomer Ethylene Propylene Neoprene Ethylene Propylene Nuclear Service

Standard

Carbon

Carbon Nuclear Service

Monel 20 CB-3 SS Alloy 20

Monel 20 CB-3 SS Alloy 20

Options

Aflas*

Tungsten Carbide Solid Silicon Carbide

* Aflas is a registered trademark of Asahi Glass Co., Ltd.

John Crane Mechanical Seals

Engineered Sealing Systems

North America Morton Grove, Illinois USA Tel: 1-847-967-2400 Fax: 1-847-967-3915 1-800-SEALING

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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. 1997 John Crane Mechanical Seals Print 8/97 Web Site: http://www.johncrane.com ISO 9001 Certified