Type DB-TB	DB-TB

Applications

• For use with extremely corrosive chemicals, including concentrated Acids and salts, strong oxidizing agents and chemically active compounds
• Suitable for use with abrasive contaminated and corrosive fluids and for Slurries, sewage water, viscous liquids.
• By choosing suitable component material the seals can be adapted to operate with a wide range of liquid and operating conditions.

Operating Limits

• Size range: 1" to 6" (10mm to 200 mm)
• Temperature: -50c° to + 120c°/-50 F° to 250 F° depending on the material used
• Pressure: 13 bar g/185 psig
• Speed: Up to 3000 RPM according to seal size and working pressure

Versatile Constructions/Options

Type DB-TB

All surfaces contacting the liquid being sealed are made of chemically inert materials. Metallic components are located outside the seal chambers and isolated from the liquid area.

Design features

External Mounting

Mounted outside of the seal chambers with only the internal surfaces of the bellows and face in contact with the liquid.

Flexible PTFE Bellows

Maximum corrosion resistance. Eliminates the possibilities of seal face misalignment. Compensates for shaft run-out to promote long life operation.

Mechanical Drive

Half clamps secure the bellows tail to the shaft and eliminates galling and premature shaft wear.

Replaceable Seal Face

These seals have replaceable seal face insert, so that different face materials can be used to handle wide range of corrosive and abrasive fluids.

Field Repairable

Reduces inventory requirements. Seals can be repaired easily on site or at any Daybreak's seal repair centers, and/or converted to various seal face combinations.

Type DB-M7NU (Unbalanced Seals) Type DB-M7NB (Balanced Seals)	DB-M7NU

Applications

• General chemical applications, oil refining and petrochemical, Pharmaceutical industries.
• Suitable for use with abrasive clear and corrosive fluids and for cryogenic and high temperature applications.
• By choosing suitable component material the seals can be adapted to operate with a wide range of liquid and operating conditions.

Operating Limits

• Size range: 3/8" to 8" (10mm to 200 mm)
• Temperature: -50c° to + 500c°/-60 F° to 930 F° depending on the material used
• Pressure: Type DB-M7NU-Up to 17 bar g/247 psig, Type DB-M7NB Up to 62 bar g/900 psig
• Speed: Up to 6000 RPM according to seal size and working pressure

Versatile Constructions/Options

Type DB-M7NU (Unbalanced) / DB-M7NB

An "O" ring sealing member available in various rubbers. TTV "O" rings and other choices available as per the applications.

Design features

Precision Lapped Sealing Faces

Lapping process results in high precision finish with optimal flatness.

Balanced/Unbalanced Designs

Positive hydraulic balancing permits use in high pressure. Unbalanced design can be used for lower pressure applications, saves cost.

Wave Spring Design

Non-Clog wave type design of the single spring offers advantage in handling contaminated liquids. Occupies less space and offers even face pressure

Compact Design

Permits use in all types of rotating equipments such as centrifugal pumps, mixers, and agitators

Field Repairable

Reduces inventory requirements. Seals can be repaired easily on site or at any Daybreak's seal repair centers, and/or converted to various seal face combinations

Type DB-EB (Reverse Balanced Seals)	DB-EB

Applications

• General chemical applications, oil refining and petrochemical, Pharmaceutical industries.
• Suitable for use with abrasive clear and corrosive fluids and for cryogenic and high temperature applications. Most recommended for Vacuum applications.
• By choosing suitable component material the seals can be adapted to operate with a wide range of liquid and operating conditions.

Operating Limits

• Size range: 3/8" to 8" (10mm to 200 mm)
• Temperature: -50c° to + 500c°/-60 F° to 930 F° depending on the material used
• Pressure: Up to 52 bar g/750 psig
• Speed: Up to 6000 RPM according to seal size and working pressure

Versatile Constructions/Options

Wedge sealing member available in PTFE and exfoliated Graphite material. Creates positive seal for use in extreme temperature/chemical.

Type DB-EBV

An "O" ring sealing member available in various rubbers. TTV "O" rings and other choices available as per the applications.

Design features

Precision Lapped Sealing Faces

Lapping process results in high precision finish with optimal flatness.

Reverse Balanced Designs

Reverse hydraulic balancing permits use in high vacuum & positive pressure.

Even Face Pressure

The multi-spring designs ensure even face pressure for minimal face wear and compensation for some shaft misalignment.

Compact Design

Permits use in all types of rotating equipments such as centrifugal pumps, mixers, and agitators.

Field Repairable

Reduces inventory requirements. Seals can be repaired easily on site or at any Daybreak's seal repair centers, and/or converted to various seal face combinations.

Type DB-M7NU (Unbalanced Seals) Type DB-M7NB (Balanced Seals)	DB-M7NU

Applications

• For pulp and paper, petrochemicals, food processing, wastewater treatment and other demanding applications
• Suitable for use with abrasive contaminated and corrosive fluids, for slurries, sludge and effluents with solid presence
• By choosing suitable component material the seals can be adapted to operate with a wide range of liquid and operating conditions

Operating Limits

• Size range: 3/8" to 6" (10mm to 200 mm)
• Temperature: -40c° to + 205c°/-40 F° to 400 F° depending on the material used
• Pressure: Type DB-LP-Up to 17 bar g/247 psig, Type DB-LM Up to 62 bar g/900 psig
• Speed: Up to 6000 RPM according to seal size and working pressure

Versatile Constructions/Options

Type DB-LP

An"O" ring or "U" pack-sealing member available in TTV, Rubber and Flexible Grphite, creats positive sealing along with the rotating shaft.

Type DB-LM

Typical Duck Bellow made of suitable rubber. The tail end of the duck bellow is held tight to the shaft to form a static sealing joint. As the seal face wear occurs, the bellow convolution extends the seal face to compensate the wear.

Design features

Self-Aligning Design

Automatic adjustment compensates for abnormal shaft end play, run0out, and primary sealing wear and machinery tolerances leading to improved seal life.

Compact Design

Full convolution elastometric Bellows designed for confined spaces and limited gland depths. Self-aligning feature compensates for shaft end play and run-out.

Single Coil Spring

The single coil spring designs ensure the safe pass thru of contamination or solids presence in the process liquid. On clog design which allows the usage of seal in wide range of slurries and sludge type applications.

Field Repairable

Reduces inventory requirements. Seals can be repaired easily on site or at any Daybreak's seal repair centers, and/or converted to various seal face combinations.

Type DB-MB Metal Bellow Seals

Applications

• For use with high temperature oils, chemicals, Petrochemicals and refinery processing DIN 24960 and ANSI B73 pump applications
• Suitable for process services requiring corrosion resistance
• By choosing suitable component material the seals can be adapted to operate with a wide range of liquid and operating conditions

Operating Limits

• Size range: 1" to 6" (10mm to 200 mm)
• Temperature: -75c° to + 430c°/-100 F° to 800 F° depending on the material used
• Pressure: 35 bar g/500 psig
• Speed: Up to 3000 RPM according to seal size and working pressure

Versatile Constructions/Options

Type DB-MB

Edge welded Metal bellow seals are constructed by series of stainless steel diaphragm together to from a bellow unit. The bellow unit eliminates the need of springs and provides flexibility to the seal in addition compensates for seal face wear.

Design features

Optimum Designed Bellows

Provides superior performance in the most difficult process services.

Daybreak Graphoil Secondary Seal

Pure and flexible Graphite packing allows seal to be used in extreme temperature conditions.

Tilted Bellows Angle

Angle of bellow section is tilted at the inner diameter weld to relive stress concentration and provide longer seal life. Double nested configuration improves flexibility and reduces stresses.

Large Grub Screws and Cap Screws

Ease of installation with strength. Provides firm grip on the rotating element.

Self-Cleaning Design

Rotating bellows throw off suspended solids that clog the spring type seals. This self-cleaning action eliminates the need of external flushing, filters or cyclone separator and their associated cost.

Field Repairable

Reduces inventory requirements. Seals can be repaired easily on site or at any Daybreak's seal repair centers, and/or converted to various seal face combinations.