Vulcan Multi-Spring Seals

Introduction Vulcan Multi-Spring Seals

Vulcan’s extensive 16XX range of Multi-Sprung Seals are commonly specified for arduous applications, such as corrosive process fluids or demanding operating parameters. The standard designs are available with a chemically resistant PTFE wedge component, which is spring loaded to force the flexible angular lip of the wedge into tight contact with the shaft.

The same spring force impacts a sufficient load to the rotary face to create a suitable seal interface with a varied choice of standard stationary seats, most commonly our Type 25 V Seat. Balanced face designs are also available for higher duty applications. ‘O’-Ring variants, of both balanced and nonbalanced Types, are available as standard. All the seal faces and wedges interchange with most common competitor designs by fitting into their retainers.

Applications

The 16XX family range are ideally suited for corrosive duties and are commonly utilised in the chemical industry, due to the inertness and sealing nature of the wedge design. These seals are also very suitable for a wide spectrum of application conditions. Their operating suitability range is enhanced by the ‘O’-Ring alternative design and the wide range of available elastomers.

Standard Vulcan 16XX Types Type 1609 Series Standard multi-sprung, grub screwed seal, available in a wide variety of face and secondary seal, materials and designs. Type 1659 Series As above, but compact design complies to DIN 24960 (EN12756) and ISO 3069 standards. Type 1645 Series Thin profiled, multi-sprung, grub screwed seal, conforming to ANSI B73 for American standard equipment.

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Vulcan Wave Spring Type Seals

Vulcan Wave Spring Type Seals Introduction :-

The Vulcan Wave Spring Range of Bi-Directional mechanical seals offer proven design and wave spring technology, in a multitude of material combinations, with superior designs but at very competitive pricing.

Applications :-

This range was specifically designed for rotary lobe pumps, whose principle application is normally for liquids of high viscosity. These are commonly found in the food, dairy, brewery and pharmaceutical industries. Their compact design makes these seals an excellent choice for confined stuffing boxes areas or even external mounted applications

Standard Wave Spring Spring Types 1. Type 1688
2. Type 1677
3. Type 1688L
4. Type 1682
5. Type 1678
1.Type 1688

The robust wave spring seal is ideally suited for standard, rotary lobe pump, stuffing boxes, of compact design. The seal is positively driven by grub screws and supplied from Vulcan with monolithic hard face materials as our standard.

2. Type 1677

The Type 1677 is a positively, bi-direction driven wave spring seal, utilising crest to crest wave spring technology, offering excellent axial movement capabilities. The seal is radially compacted and designed to suit DIN 24960 (EN12756). The design of this seal head, enables easy replacement of a wide range of high quality materials and elastomers, supplied as standard.

3. Type 1688L

As above but supplied with a Type 24 DINL pinned stat, to suit DIN standard housing dimensions.

4. Type 1682

A wave spring seal to suit standard rotary lobe pumps. The Type 1682 is similar in design to the Type 1688 but is driven directly from the grub screws.

5. Type 1678

Designed as per the Type 1677 but with a stepped face, to provide a balanced seal for stepped shafts.

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HARD FACED SINGLE CARTRIDGE SEAL

HARD FACED SINGLE CARTRIDGE SEAL

< ASP Stainless Steel Single Cartridge Seal
< Balanced
< Multi-Directional
< Flush Connection included
< SC / SC Hard Face Standard
< ASP SCS single cartridge seals are fully pre-assembled

They are balanced and can be used in either direction of rotation. The energizing springs hold the seal faces together from outside the stuffing box, keeping them from clogging and losing compression. By making all of our seal faces “hard faces” your seals will last. In the short run our ASP SCS will help reduce your mechanical seals cost. In the long run your maintenance and clean up expenses are reduced. Our seals protect your bearings, and your budget.

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What is ASP TYPE 60 and How to works?

This seal is known as the friend of the maintenance man and can be used where a highly reliable, anti-clog seal is required. Long life is assured with the cool running AST 60 Seal. The floating rotary seal face eliminates seal face distortion inherent to shrink fit seal designs.

Since the springs are isolated from the pump, you may be able to reduce or eliminate flushing and product dilution.

Rebuild kits are available so you can rebuild the ASP 60 in your plant without tools. You control your seal repairs: no waiting for an exchange seal or cross-contamination from previous service.

! The ASP 60 Seal is designed for use in
! Power Generation: Cooling water, slurries, boiler feed, recirculation
! Chemical Processing: Reagents, solvents, process streams, paints
! Food Processing: Starches, slurries
! Wastewater Treatment
! HVAC Systems
! Pulp and Paper Mills: Brines, solutions
! Steel Mills: Pollution control, cooling water

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What are the different styles of PTFE

Molded and Sintered PTFE:

This type of PTFE was the first to be introduced to the market. This style is made from virgin or reprocessed PTFE resin, without fillers, which is then molded, compressed and sintered. As with any other type of plastic, PTFE has a high creep factor when compressed. The creep factor is detrimental and can lead to having to re-tighten the bolts to maintain seating pressure and prevent leakage. The higher the temperature in the application it is used for, the more the creep factor will increase. Even with these drawbacks, PTFE is affordable, easily available and highly chemical resistant.

Skived PTFE:

This style is similar to molded and sintered PTFE as it is also make of virgin or reprocessed PTFE without fillers. Instead of molding an individual sheet, the sheets are taken from a billet of PTFE with a process called skiving. The skiving process was developed to overcome manufacturing deficiencies of the molding process. Skived PTFE shares the same creep characteristics as molded and sintered PTFE.

Molded or Skived Filled PTFE:

In order to correct the creep characteristics of molded and skived PTFE, manufacturers started adding mineral fillers or fibers in order to reduce creep factor. This indeed reduced the creep characteristics but not by a significant amount.

Restructured Filled PTFE:

Besause the addition of fillers in the molding process was not enough to significantly reduce creep, a new manufacturing process was developed to produce filled PTFE sheets. In this new process the material is laminated before being sintered, which yeilds a highly fibrillated structure with significantly less creep. The different fillers used in this process are as follow:

• Barite: Added for use in strong caustic service. Also FDA compliant.

• Mineral Silica: Used for strong acidic service.

• Hollow Glass Microshperes: Used to increase compressibility.

• Synthetic Silica: Used as subsitute for glass microspheres.

Expanded PTFE:

This style of PTFE is made by heating and stretching PTFE before sintering it. Lke all PTFE it has strong chemical resistance, but unlike molded or skived PTFE, this material has a high compressibility and is good for use in flanges made from fragile materials. The only drawback to this material is that its floppy and difficult to install, especially if the flanges cannot be separated.

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Types of Cartridge Seal

Single Cartridge Seal

A versatile single seal for use in a wide variety of applications.

• Stationary Seal
• Self-Centering Lock Ring
• Adjustable gland tabs
• Monolithic Seal Faces
• Low heat generation
• Non fretting pump/seal parts
• 360 degree flush port orientation
• Low emissions design

Buy online : http://www.sealsales.com/MScart1.shtml Double Cartridge Seal Double Cartridge Seal is a general duty, dual seal for plant wide use.

• Geometric Double Balance
• Self-Centering Lock Ring
• Unified Seal Face Alignment
• Internal Pumping System
• Floating flow channel
• Springs isolated from fluids
• Large barrier fluid ports
• Monolithic Seal Faces

Buy Online : http://www.sealsales.com/mechanicalseals/Doublecartridge.shtml

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Why Mechanical Seals ?

One of the most important advantages of the mechanical seal is its low leakage rate, resulting in a cost saving because of the reduxtion in lost liquid.
The hazards of fire and personal injury are also reduced when the pumps are handling inflammable or toxic products. Simplified pump designs and reduced maintenance costs are also plus factors.

Mechanical Seals Online Shopping in USA by mechanical-seal The Most Common Seal Consists of a stationary flat seat which is mounted into a gland or seal chamber, a spring loaded rotating face and a static seal along the shaft. The spring holds the rotating face to the stationary face and sealing occurs between the parallel faces. The static seals stop leakage between the shaft and the rotating seak head and also behind the stationary seat. The faces of the Mechanical Seal in operation do not actually rub against each other, but are separated by a thin lubricating film a few molecules thick. This can account for the slight weepage from some seals that are operating satisfactorily.

Since all the wear is on the seal faces, further savings are realized due to elimination of shaft or sleeve wear which would result in use of packing.
Most Seal applications will runs years with little or no maintenance. Time formerly spent on adjustment of packing can be used elsewhere.

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