bellows mechanical seal supplier

A Bellows seal does not have a secondary seal that must move along the shaft or sleeve to maintain seal face contact. The secondary seal is static state at all times, even when the pump is in operation.

Primary seal face wear is typically accommodated by welded metal or elastomeric bellows which move to assist in the compression of the rotary to stationary seal faces.

Bellows seals allow for high and low temperature applications when used in conjunction with metal bellows. They do not require a rotating secondary seal, which means it is not prone to secondary seal hang-up or fretting along the shaft or sleeve.

... dual pressurized gas barrier metal bellows seal utilizing APGS non-contacting seal face technology. Welded metal bellows eliminate dynamic O-ring hang-up in a compact ...

LATTYseal U 6812 offers an instantaneous interchangeability of the rotating face permitting multiple use and cost reduction. Wide spectrum of rotating ...

... 425 ºC;• Inconel bellows available;• Cartridge easy to install;• Metal bellows provide better faces alignment;• Does not have dynamic gaskets;• Self-cleaning;• Adapts to API standard pumps;• Available ...

Cartridge seals for critical, toxic and emission control applications, where single seals are notaccepted;• Built-in pumping device improves barrier fl uid cooling;• Springs locations prevents contact ...

Burgmann H74-D Mechanical Seal called as PC04 are specialized in mechanical seals products. This device gives double seal and it can be rotated in any ...

FLEX MECH-Seal(china)Co.,ltd. is spent significant time in mechanical seals items including for auto cooling pump mechanical seals,for car air-layer ...

The PTFE bellows type mechanical seal, manufactured by Chinabase Machinery, can operate on a temperature range of -45°C up to 250°C on a pressure ≤1.2 Mpa and speed of ≤15 m/s. The stationary ...

The mechanical seals are designed to deliver excellent twin directional sealing performances in general purpose machines and are geared to operate in low to medium pressure applications. They are equipped ...

The MTM 51 series is an elastomer bellows type mechanical seal developed by Microtem. It is mainly used for general services machinery at low and medium pressure. This double directional ...

The MICROTEM double directional mechanical seal is with a single cylindrical spring is unbalanced and i elastomer bellows. It is used for general services machinery at low-medium pressure ...

The PK Seal features a single spring rubber bellows that will not wear the shaft or sleeve. It fits into shallow stuffing boxes and the flexible rotary face floats to compensate for misalignment.

... performance, the Type 1 elastomer bellows seal is widely recognized as the industry"s workhorse. Suitable for a wide range of service conditions ranging from water and steam to chemicals and corrosive ...

The BDFI™/BDFC™ (Bellows Double Flow Induction/Convection) is an innovative modular hybrid design, created using the inboard design of a BQFD™ and the outboard ...

Mechnical seal type 5030 / 5031 »with rubber bellowssingle-actingnon-anisotropicAreas of usestandard pumpwaster water pumpsupply engineeringgeneral industrial usemass production seal

Robust bellow seal with non-DIN cross-section, available inthree standard DIN working lengths and with stationaries to suitall common European housing sizes.

Available in low- and high-temperature designs, the ECS® is a dry-running seal for emission containment and safety/backup that successfully controls...

The Type 1604 high-temperature, high-performance Type C, Arrangement 1, API 682/ISO 21049 qualified cartridge seal is designed for high-temperature applications such...

The Type 3604/3604HTC/3604HTCDP is a highly reliable dual face-to-face stationary cartridge seal for high-temperature refinery services that is fully API...

Asymmetric formed metal bellows designed for general purpose use. General sealing duties include biotechnology, chemical processing, food processing, mining, oil,...

The 5600 Series is the first truly universal cartridge seal — and the modular family concept of John Crane"s Universal Cartridge will change your approach to sealing...

John Crane brings you the world’s most complete selection of performance-proven edge-welded and formed metal bellows sealing products used in a wide range of rotating equipment such as pumps, compressors, mixers, and agitators. Our experience in diverse industries such as oil & gas, petrochemical, chemical, refrigeration compressor, pharmaceutical, food processing, pulp & paper, and more have proven the soundness of John Crane’s metal bellows design.

Yes, Flexaseal’s edge-welded bellows are completely manufactured at our Vermont factory. Our welding department and engineering staff work closely together to control the manufacturing quality of all bellows assemblies, from stamping sheets of foil stock through welding cores and end fittings, evaluating spring rates, and pressure testing the completed assembly. We use the TIG (Tungsten Inert Gas) welding process which provides the finest control of the weld arc, resulting in efficient, clean, and long-lasting welds.

Formed bellows are manufactured from either welded (seamed) or seamless tubing and utilize extensive automation for mass production. This process offers some cost benefits over edge-welded bellows assemblies however, formed bellows are limited to materials which can be elongated through either rolling or hydroforming. Formed bellows typically have thicker convolution structure with higher spring rates and larger deviations than edge-welded bellows which impacts precision loading.

Flexaseal designs and manufactures edge-welded bellows. Our bellows production begins by stamping male and female diaphragms from sheet (foil) stock. We inventory foil stock including various Hastelloy™ and Inconel® grades, titanium and Monel® as well as cryogenic-grade materials, to accommodate a wide range of applications. Diaphragms are TIG-welded together to create a convolution, and these convolutions are assembled together and welded to create the bellows core. Bellows core sizes can range from just a few welded convolutions to 100+ convolutions for a hermetic bellows assembly.

Contrary to popular belief, it is possible to repair a rotary bellows assembly. If pressure testing reveals leakage around the seal face, Flexaseal will de-insert the current face and check the retainer for any damage. If the retainer is within the necessary tolerances, FAS will insert a new face into the assembly as well as replace the other wear parts (O-ring and hardware).

If the bellows rotary shows visible damage to either the bellows core or end fittings, or a pressure test reveals leaks in the assembly itself, Flexaseal recommends a new bellows assembly to ensure sealing integrity.

In a pusher seal design, the secondary sealing component – usually an O-ring or a wedge — must move axially to compensate for wear, vibrations, and movements of the shaft.

Welded bellows assemblies also offer the benefit of an inherently balanced seal design. Mechanical seal balance refers to the ratio of the opening and closing areas of the seal faces. Both a balanced and unbalanced design may have the same opening face area but the balanced seal’s closing area is smaller, reducing the load on the faces. This reduced load means less heat generated at the seal faces, enabling the balanced seal to run cooler than an unbalanced seal design. This cooler operating environment positively impacts a seal’s run time.

If your facility must comply with API Standard 682 which requires all Type B or C cartridge seals to utilize a balanced seal design, standardizing on hydraulically balanced, welded metal bellows seals ensures satisfactory seal run time and low seal maintenance for your equipment.

Operating length (OL) - also referred to as installed or working length: The axial length of a bellows assembly as installed to the designed compression. The term may also refer to the dimensional range within which a bellows assembly can safely be operated.

Mechanical seals, whether a pusher or bellows design, need a specific amount of compression to ensure the faces are in contact to maintain the correct amount of lubrication to operate (dry-running seal designs are the exception to this statement.) Both the Free Length and Operating Length are necessary for this compression calculation: Free Length – Operating Length = amount of compression. Here’s an example:

Manufacturer"s representative of manufacturing process equipment companies. In-tank mixing solutions are available, including sanitary, in-line static, and bottom entry mixers; impellers; and mixer drivers and gearboxes. Other products include decanter and vertical centrifuges, oil extraction mills, thermal sludge dryers, mobile skids, centrifuge controls, and mechanical seals. Single and double cartridge, cryogenic, metal bellows seals, split single and double, and custom engineered seals can be provided for products such as pumps, mixers, compressors, centrifuges, and other rotating equipment. Repair services are offered for mechanical seals. Predictive maintenance and vibration analysis programs can also be provided. Serves manufacturing plants in the oil and gas, paint and coating, chemical, mineral processing, food and beverage, water and wastewater treatment, pulp and paper, and power generation industries.

Specially designed for cryogenic temperatures and high temperatures, mechanical seals with metal bellows are used when mechanical seals with elastomeric components are not adaptable to extreme temperatures. Our proprietary metal bellows allow us to design and recommend the most efficient solutions to meet your specific application parameters and operation requirements.

Bellows Mechanical Seal are a type of mechanical seal where the spring element is a bellows. This eliminates the need for a secondary dynamic seal e.g o-rings. Bellows Mechanical Seals are also known as non-pusher seals as they have a static secondary seal which stays in place against the shaft, sleeve or on the gland of the pump.

A bellows mechanical seal is used where a dynamic seal is deemed unsuitable for the application e.g high temperature medium slurry or high seal hysteresis.

The primary mechanical seal functions exactly the same as a standard mechanical seal except the spring element is now being replaced with a bellows. The friction from the dynamic seal (e.g o-ring) is not a consideration.

However if a bellows mechanical seal should fail it can be due to several reasons such as; poor wielding, product particulate getting into the bellows and causing the spring element to fail, chemical and/or abrasive attack or over-pressure.

If you have any query around how to install bellow mechanical seals for pumps or have some concerns around the seal failures, why not contact one of our seal specialists below to discuss it in more detail and find out how we can help solve your issues and get your process back up and running reliably again.

Asymmetric bellows form results in even stress distribution with benefits of greater strength and higher rate of flexibilty; seal is bi-rotational and inherently pressure balanced.

Smooth profile is resistant to clogging and therefore ideal for slurries and fibrous liquids. Similarly, seal unit is easy to clean and sterilize in place.

It is easy to occur coking and carbon deposition at the trough between the wave plates, which makes the bellows lose elasticity and cannot compensate, so it can not be used for coking, carbon deposition and crystallized precipitation pump.

For external installation mechanical seals, the sealing surface can be pushed open when the pressure in the sealing cavity is more than 0.2MPa. This is because the elastic force of the bellows is small and can not withstand the high pressure of the medium. Therefore, it is not possible to use an external bellows mechanical seal when the pressure is high.

Because the metal bellow type mechanical seal is a balanced structure, the effective diameter and load factor must be calculated in use. Otherwise, in the high-pressure propane and propane pump, the phenomenon of "spray leakage" is easy to occur.

The welded metal bellows mechanical seal has good floating and random compensation, which can compensate for the leakage caused by wear, axial movement and vibration. Welded metal bellows itself as the elastic element and the sealing function, so there is no need to design the general dynamic auxiliary push ring spring type mechanical seal ring, thus avoiding the fine particles due to dynamic auxiliary seal ring caused by the obstruction, dynamic auxiliary seal and high temperature because of its axial friction resistance reduction the seal compensation ability of the problem.

Metal bellows mechanical seal with no auxiliary seal ring, reduce a leak; at the same time reduce the friction resistance compensation mechanism, improve the following; in the petrochemical industry, welding sealing temperature is not restricted by auxiliary seal bellows; for PTFE bellows seal can be used in the corrosive medium. Its drawback is that some bellows have the smaller elastic force and need to add auxiliary springs.

Welded metal bellows are made by interlacing and closely welding each internal and external diameters of each wave plate, so no matter whether they are used as the stationary or rotary type, it is not necessary to consider the problem of rotation. Welded metal bellows can be made from precipitation hardening stainless steel, high-temperature nickel based materials and chrome-nickel corrosion resistant materials. Therefore, welded metal bellows can be applied to a wide range of temperature (-117 C - 426 C), and various acid, alkali and salt media. The selection of different thickness and layers of the wave plate makes it withstand a pressure of up to 7MPa in a special pump. The design of welded metal bellows seal is generally balanced, so its pressure bears little influence on the surface pressure. The welded metal bellows mechanical seal is not only suitable for nonhydrocarbon media, but also for flash hydrocarbon medium. Compared with the ordinary mechanical seal, its service life has been greatly improved, so it has a higher ratio of performance and price.

We recognize and understand the vital role of metal bellow mechanical seal in their application. With purposes including securely fastening components within systems, and contaminants prevention such as gases and liquids from navigating through enclosed and sealed areas. That is why we offer wholesale metal bellow mechanical seal in different variations and diversities to ensure the integrity and efficiency of systems they will be applied to will function successfully and optimally. The different seals" types available include static that does not move along with other seals and dynamic seals that move collaboratively.

Depending on the industry and selected purpose, we consider metal bellow mechanical seal requirements. Requirements are like pressure, that is pressure changes, to ensure they can withstand and do not deform by the sealed fluid, the load and how it can withstand deflection, dynamics such as the alignment and vibration, and temperature covering the environmental conditions and the heating arising from the friction of the seal operation and fluid movement.

The seals are either bolts, nuts, or washers. Seal bots are commonly used because of their benefits in being reusable, preventing fluids and contaminants from escaping even under high pressure. Nuts are essential on temperature withstanding and compatibility with screws, studs, and bolts, in addition to, easy installation. Moreover, washers can withstand high pressures and are compatible with other seals.

Blessed and supported by the team of high skilled and talented personnel, our company is considered as one of the leading manufacturers and exporters of Mechanical Bellow Seals.Widely accredited for its excellent quality and durability, our gamut of bellows is made in compliance with the national and international standards. We are offering these supreme quality Mechanical Bellow Sealsto our clients in varied technical specifications and that too at competitive prices.