About Rubber Bellow Type Mechanical Seals
Rubber Bellow Type Mechanical Seals are a classic mechanical seal solution that combines simplicity, reliability and wide applicability. They are widely used in sealing problems of various rotating equipment.
Features
■ Wide range of applications: Rubber bellow type mechanical seals are suitable for a variety of applications, including but not limited to water/water-based solutions such as oil, fuel, etc.
■ Economical: They are affordable, durable, and can easily convert stuffing box pumps to use mechanical seals.
■ Easy to install: Bellows mechanical seals are simple in design, easy to install, fit existing stuffing box sizes, and are suitable for higher pressures.
■ Diverse material selection: According to application requirements, different material combinations can be selected for parts such as bellows, springs, facing materials, etc., such as NBR, EPDM, Viton and other rubber materials for bellows, SS304, SS316 for springs and metal parts, and carbon, SiC, TC, etc. for facing materials.
■ Operating parameters: The operating parameters of rubber bellow mechanical seals include size range, pressure, temperature and speed. For example, a certain model of rubber bellows mechanical seal is suitable for sizes 15mm-100mm, pressures up to 25bar, temperatures below 200°C, and speeds below 3000RPM.
Rubber bellow type mechanical seals are commonly used in chemical process pumps, oil pumps, etc. due to their compact design and superior performance. They are an alternative to traditional spring mechanical seals, providing a more compact and efficient sealing solution.
Application Scenarios
Rubber Bellow Type Mechanical Seals have a wide range of specific application scenarios in various industrial fields, mainly including the following:
Chemical industry
- Stirred reactor
- Centrifugal pump
- Catalyst reactor
- High temperature and high pressure reaction equipment
Pharmaceutical industry
- Bioreactor
- Pharmaceutical equipment
- Traditional Chinese medicine extraction equipment
- Aseptic filling equipment
Electric power industry
- Hydrogenerator
- Steam generator
- Electric motor
- Valves
Food and beverage industry
- Juice beverage production line
- Dairy production equipment
- Meat processing equipment
- Candy production machinery
Mining industry
- Mining pump
- Crusher
- Ore dressing equipment
- Coal washing equipment
Textile industry
- Textile machine
- Dyeing equipment
- Printing machine
- Silk reeling machine
Oil and gas industry
- Drilling rig
- Oil pump
- Compressor
- Valves
These are the most common application scenarios of Rubber Bellow Type Mechanical Seals. They can reliably seal various corrosive and abrasive working media in these equipment and withstand harsh working environment conditions. Rubber Bellow Type Mechanical Seals have therefore become the first choice for sealing equipment in these industries.
Material Selection
The choice of rubber material for Rubber Bellow Type Mechanical Seals depends on the specific needs of the application, including factors such as temperature range, pressure, chemical compatibility, speed and axial movement. The following are some common rubber materials and their application scenarios:
1. NBR (nitrile rubber): has good oil resistance, wear resistance and aging resistance, suitable for general industrial application environments, such as automobiles, hydraulic equipment, air conditioning systems, etc.
2. EPDM (ethylene propylene diene monomer rubber): has excellent aging resistance, ozone resistance and corrosion resistance, suitable for sealing applications in special occasions such as outdoor environments and hot water systems.
3. Viton (fluororubber): has excellent high temperature resistance, chemical corrosion resistance and oil resistance, suitable for sealing applications in harsh environments such as high temperature and high pressure, corrosive media, etc.
4. Silicone rubber (VMQ): has excellent high temperature resistance, ozone resistance and corrosion resistance, suitable for sealing applications with special requirements such as high temperature and high pressure, food grade, medical grade, etc.
5. HNBR (hydrogenated nitrile rubber): has good oil resistance, wear resistance and high temperature resistance, suitable for sealing applications in high temperature and high pressure environments such as automotive braking systems, fuel systems, air conditioning systems, etc.
6. CR (Chloroprene Rubber): It has good weather resistance and ozone resistance, and is suitable for outdoor environments or places that are greatly affected by ozone and ultraviolet rays, such as car tires, seals, etc.
Depending on different application requirements, the material selection of rubber bellow type mechanical seals can be a single material or a combination of multiple materials. For example, the sealing surface may use carbon, SiC or TC, while the bellows may use materials such as NBR, EPDM or Viton, and the springs and metal parts may use SS304 or SS316. The correct material selection can ensure the performance and life of the mechanical seal in a specific application.
FAQ
Q: How does a rubber bellow type mechanical seal work?
A: A rubber bellows mechanical seal provides reliable sealing performance through its high elasticity and flexibility. It is able to adapt to seal face misalignment, end float and seal face wear.
Q: What applications are rubber bellows mechanical seals suitable for?
A: Rubber bellow type mechanical seals are typically used for water, oil and light load applications. They are compact in design and offer many benefits.
Q: What are the design features of rubber bellows mechanical seals?
A: For example, Type ‘CNT’ rubber bellows mechanical seals have double balanced sealing faces, Lug-drive design to protect the bellows from torsion, and holes on the lugs to ensure fluid circulation in the seal chamber and prevent the accumulation of solids in the seal space.
Q: What are the material options for rubber bellows mechanical seals?
A: Different parts of the rubber bellow type mechanical seal can use different material combinations, for example, the bellows may use rubber materials such as Neoprene/EPDM/Viton, the spring and metal parts may use SS 316, the hard facing material may use SIC/TC/Plasma Ceramic, and the soft facing material may use Carbon.
Q: What are the operating parameters of the rubber bellows mechanical seal?
A: The size range is from 15mm to 100mm, the pressure is up to 25bar, the temperature is less than 200°C, and the speed is less than 3000RPM.
Q: How economical is the rubber bellows mechanical seal?
A: The rubber bellows mechanical seal is economical, durable, and can provide a card-type design to suit the customer’s equipment needs.
Q: Is the rubber bellows mechanical seal independent of the direction of rotation?
A: The rubber bellows mechanical seal is independent of the direction of rotation, has the characteristics of a single spring and the product is protected.
Q: What are the types of rubber bellow type mechanical seals?
A: According to different materials, mechanical bellows seals are divided into three types: rubber, metal and PTFE.
Tips: Rubber bellows mechanical seals are available in standard and customized products. If you need customization, please provide the drawing size or send us a sample.
