balanced mechanical seal price

Many early mechanical seal designs placed the spring inside the process fluid. Most products (process fluids) that are sealed are not very clean. When the spring mechanism of the mechanical seal is immersed in this unclean fluid, dirt collects between the springs. This situation eventually impacts the spring’s ability to respond to movements and vibrations, and the ability to keep the seal faces closed. Over time, clogging of the springs will cause premature seal failure.

The ideal design offers springs on the atmospheric side of the mechanical seals. The springs will be protected from the process fluid and their ability to work will not be impeded.

The pressure from both the seal springs (Ps) and the hydraulic pressure of the liquid in the pump (Pp) provide a compression force that keeps the seal faces closed. Balanced seals reduce the seal ring area (Ah) on which the hydraulic pressure of the liquid in the pump (Pp) acts.

By reducing the area, the net closing force is reduced. This allows for better lubrication that results in lower heat generation, face wear, and power consumption. Balanced seals typically have higher pressure ratings than unbalanced seals.

Mechanical seals can be designed with inserted seal faces or with monolithic seal faces. In both cases, the sacrificial seal face is often made from carbon/graphite. This material offers good running properties but is relatively weaker from a mechanical standpoint than other options. Inserted face designs use a metal rotary holder to transmit the shaft torque to the seal face.

The disadvantage of this inserted face design is that the face and holder material have different coefficients of thermal expansion. This changes the net interference force between both parts when they are exposed to heat from the process fluid or face friction. The seal face deforms, which results in leakage and accelerated wear.

More modern seals are equipped with monolithic seal faces that are made out of only the seal face material itself. The torque transmission is applied directly to the seal face. This is possible if the geometry of the seal face is designed in a particular shape to give it the strength to handle the torque through its geometric design. These monolithic seal face designs have been made possible through the use of Finite Element Analysis (computer modeling).

Monolithic seal faces provide a more stable fluid film between the faces, and they do not deform in operation compared to inserted faces (or to a much lesser degree). Therefore, they are more commonly used nowadays when reliability and low emissions are vital.

All mechanical seal designs have at least one secondary seal that interacts with the dynamic movement of theflexible mounted face. This secondary seal moves with the springs to keep the seal faces closed and is defined as thedynamic secondary seal. During operation of a rotary design, springs will keep the seal faces closed. They adjust with each rotation for any misalignment from installation and parts tolerances. As the springs compensate, the dynamic secondary seal moves back and forth, twice per revolution. This rapid movement prevents the protective chrome oxide layer (the layer that protects the metal) from forming. Erosion of this unprotected area under the dynamic secondary seal will cause a groove to develop. Eventually this groove becomes so deep that O-Ring compression is lost and the seal leaks. In most cases, fretted shafts must be replaced to achieve an effective seal.

With rotary mechanical seals, it is important that the stuffing box face is perpendicular to the shaft for the faces to stay closed. There will always be some resulting misalignment from installation and parts tolerances. The springs must adjust with each rotation to keep the seal faces closed. This adjustment becomes more difficult at higher speeds.

In contrast, a stationary seal is a mechanical seal designed in such a way that the springs do not rotate with the pump shaft; they remain stationary. Because the springs do not rotate, they are unaffected by rotational speed. The springs do not need to correct or adjust with each rotation; they adjust for misalignment only once when installed.

Rotary seals are simple in design which makes them inexpensive. They are suitable for lower speeds only. Stationary seals are more complicated to design but are suitable for all speed ranges. Because of design complexity, stationary seals are more commonly configured as cartridge seals rather than component seals.

Marco Hanzon is Vice President of Global Marketing for A.W. Chesterton Company. He has been an active member and past chairman of the Mechanical Seal Committee of the European Sealing Association. Marco"s experience includes working as an In-Field Support Engineer for mechanical seals.

We are a leading Manufacturer of multiple spring balanced & unbalanced seal, teflon bellow seal, single cartridge mechanical seal and reactor agitator mixer seals from Pune, India.

Country of OriginMade in IndiaWith our vast experience & knowledge in this field, we are engaged in providing a quality-assured range of Teflon Bellow Seal

Size1-5 inchWith our vast experience & knowledge in this field, we are engaged in providing a quality-assured range of Single Cartridge Mechanical Seal .

Surface TreatmentGalvanizedBacked with huge industry experience and market understanding, we are involved in providing a wide variety of Reactor Agitator Mixer Seals for our valued patrons.

Relying on our wide experience and skills in this field, we are noted as one of the most prestigious traders, exporters and suppliers of Balanced Seal. These seals are used sugar & petrochemical industries pumps for handling toxic fluids, syrups and melt molasses. Our offered range of products is manufactured using best materials such as monel, nickel and special alloys. Available at nominal prices in the market; Balanced Sealis known for rugged structure, weather resistance and longer working life.

Reverse Balancing Seal is an externally mounted seal, which is widely appreciated owing to its robust design, top-notch functionality and performance. It is a mechanical seal designed to use for the industrial applications. Its user-friendly design makes the assembling easier and also a technician and effortlessly work with the seal in order to dismantle it. In the manufacturing of the seal, we have used only selected raw material and by making the best use of machines and technology we have come up with the full-fledged Reverse Balancing Seal. For this reason, it is one of the most sought-after product. Moreover, the provided seal does not degrade due to chemical attacks, compression, and various other detrimental factors.

We are manufacturer and exporter of SEB/SSRB Reverse Balanced Seal which is designed by using latest software which ensure preciseness. The seal is made using best grade of stainless steel and is assured for corrosion resistance. It is externally mounted and has a compact design. One of our most popular products, SEB/SSRB Reverse Balanced Seal has a reverse balanced design that makes it a flexible product.Features :