ZF Slurry Seals

CHESTERTON ZF Zero Flush Paper Stock Seal ®

ISO 14001:1996 and ISO 9001:2000 CERTIFIED

■ Enhanced Responsiveness ■ Low Heat Generation ■ Optimized Performance

Our technological innovations now bring true reliability to waterless paper stock sealing

CHESTERTON ZF Zero Flush Paper Stock Seal ®

Construction Details • 1

Dynamic o-ring is constantly cleaned in service by centrifugal action which prevents any hang-up due to paper stock while isolating springs.

2

Micro-polished dynamic surfaces for maximum seal face responsiveness.

3

Advanced seal face material for lowest heat generation.

– Eliminates the need for external water quench for cooling.

– Reduces the potential for paper stock to dry-out around the faces.

4

Mill proven face loading design for optimized seal reliability.

5

Monolithic seal faces, rather than old press-fit faces, ensure face flatness.

6

Increased clearances to prevent clogging from paper stock.

7

Cushioned drive pads prevent face damage from high-torque start-ups and evenly distribute loading.

8

Cushioned and self-aligning stationary seal face for maximum compliancy and vibration dampening.

9

Designed to fit all ABS Scan and Sulzer pumps without adapters.

Easy and quick repair on site using Spare Parts Kits. No metal parts wear in operation.

Chesterton’s ZF seal is specifically designed to survive in the harsh, but real-life environment of paper stock pumps without the need for external flushing or quenching.

Lasting…Reliable…Waterless.

•

• •

7

1

2

6

• •

• •

3

4

5

8

9

CHESTERTON

®

ZF – Dimensional Data/Metric SHAFT SIZE

PUMP FRAME NO.

A 35 mm 38 mm 40 mm 45 mm 48 mm 50 mm 50 mm 55 mm 60 mm 60 mm 65 mm 65 mm 70 mm 75 mm 80 mm 85 mm 85 mm 90 mm 95 mm 100 mm

Sulzer 1 ABS Scan 1 Sulzer 2 Sulzer 2 ABS Scan 2 Sulzer 3 KEST H Sulzer 3 Sulzer 4 KEST L Sulzer 4 ABS Scan3 KEST P ABS Scan 4 Sulzer 5 Sulzer 5 KEST R Sulzer 6 Sulzer 6 ABS Scan 5

GLAND OD

BOX BORE NOMINAL

SEAL DIAMETER

SB DEPTH

OB LENGTH

B MAX

C

D

E

F

118 137 128 128 147 150 150 150 160 160 160 173 200 183 199 199 199 209 209 213

60 95 70 70 105 85 85 85 95 95 102 131 117 140 122 122 132 132 132 171

NOMINAL BOLT CIRCLE

BY BOLT SIZE 10mm

†† Use supplied washers for 12 mm bolts

55 58 60 65 68 70 70 75 80 80 93 93 96 103 107 112 112 117 122 128

39 39 39 39 39 39 39 39 39 39 50 50 50 50 50 50 50 50 50 50

34 34 34 34 34 34 34 34 34 34 46 46 46 46 46 46 46 46 46 46

G 12mm

SLOT WIDTH / HOLE DIA. * H

GLAND WIDTH

12 12* 12 12 12* 18

20 20 20 20 20 20

18 14 18 18 14 12* 18 12* 18 18 18 18 18 12*

20 20 20 20 26 26 26 26 26 26 26 26 26 26

95 114 105 105 124 125†† 145 125 135†† 145 135 150 175 160 170 170 190 180 180 190

* Hole Diameter B E

F J

H G

C

A

ZF – Specifications STANDARD MATERIALS

OPERATING LIMITS**

Faces: Rotary/Stationary ■ Carbon/Graphitized Sintered Silicon Carbide (CB/SSCG) ■ Tungsten Carbide/ Graphitized Sintered Silicon Carbide ( TC/SSCG) ■ Graphitized Sintered Silicon Carbide/ Graphitized Sintered Silicon Carbide (SSCG/SSCG) (optional)

Speed Limits: ■ 25 m/sec (5000 fpm maximum)

Metal Parts: ■ 316SS Major components ■ Alloy C-276 Springs

J

16mm

Temperature Limits: ■ To 150°C (300°F) Ethylene Propylene ■ To 205°C (400°F) Fluorocarbon, Aflas† ■ To 260°C (500°F) Perfluoroelastomer Pressure Limits: ■ Full vacuum to 20 bar g (300 psig) ** Consult Chesterton Applications Engineering for services beyond these limits. † Asahi Glass Company Ltd. Registered Trademark.

CHESTERTON ZF Zero Flush Paper Stock Seal ®

The Zero Flush Seal is the latest in a long line of Chesterton technological innovations for the pulp and paper industry.From cartridge seals, self-aligning component seals and split seals, Chesterton has revolutionized sealing in the pulp and paper industry.

Our years of experience sealing pumps in the pulp and paper industry have been incorporated into the Zero Flush (ZF) seal.The ZF seal has many advancements that allow it to seal tough applications in stock preparation, paper machine and stock transfer.

Maximum Responsiveness

Revolutionary Seal Material Technology

Roughness Profile

Chesterton’s SSCG combines both high lubricity and maximum abrasion resistance. A homogenous matrix of graphite and sintered silicon carbide throughout has proven to be superior. High lubricity from graphite creates low seal face heat generation to prevent stock dewatering and seal hang-up.

The extreme hardness of sintered silicon carbide minimizes seal face scoring from abrasive stock.

The Zero Flush uses advanced micropolishing to maximize seal face responsiveness. Maintaining seal face responsiveness is critical to long term, reliable performance in difficult to seal fluids.

The dynamic seal surface contains lubricating graphite to minimize the harmful effects of frictional drag.The ZF seal remains flexible, resists hang-up and easily responds to the pump shaft vibration often found in tough paper stock applications.

Chesterton Zero Flush Surface Finish

Heat Generation

Tungsten Carbide

Sintered Silicon Carbide

Sintered Silicon Carbide

SSCG

Lubricating Graphite

Conventional Seals Surface Finish

Optimized seal face technology, materials and experience from Chesterton bring the pulp and paper industry true waterless pulp and paper stock sealing.....RELIABLY. "THE ZERO FLUSH SEAL"

SSCG

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., 2004. All rights reserved. ® Registered trademark owned and licensed by A. W. CHESTERTON CO. in USA and other countries.

FORM NO. 071368

PRINTED IN USA 4/04