Introduce

The crankcase vent valve diaphragm is a crucial rubber part of the car engine’s crankcase ventilation system. It regulates the crankcase pressure balance and exhaust gas output. It is mounted on the crankcase vent valve.Soft rubber is used to make the valve diaphragm. Its primary job is to release exhaust gas and let air in when the air pressure inside the crankcase changes while the engine is running. This keeps the air pressure inside the crankcase at the proper level.

Technical data

Material NBR
Density 1.0 – 1.2 g/cm³
Hardness (Shore A) 40 – 90
Tensile strength  5 – 20 MPa
Elongation at break  200 – 600%

Certification standard

  • The goal of ISO 9001, a certification standard for quality management systems, is to guarantee that producers have an efficient system in place for managing product design, production, testing, and quality control.
  • Based on the ISO 9001 standard, ISO/TS 16949 is a quality management system certification standard for the automotive sector that is specifically designed for makers of automotive parts. Manufacturers must adhere to strict guidelines set out by the automobile sector, which cover things like product quality, safety, and ongoing development.
  • The American Society for Testing and Materials developed ASTM D2000, a standard for rubber products, to assess the dimensional requirements, chemical resistance, and physical characteristics of rubber materials.
  • SAE J200: The Society of Automotive Engineers created this standard for the categorization and specification of rubber materials. It is employed to distinguish between the various rubber materials’ properties and performance levels. It covers specifications for things like oil resistance, tensile strength, and hardness of rubber material.
  • The European Chemicals Regulation, or REACH, mandates that producers and importers register, assess, and regulate chemicals in order to safeguard the environment and public health. The crankcase breather valve diaphragm must abide by REACH laws as it may contain chemicals.

Advantage and function

  1. Control crankcase pressure effectively: The crankcase vent valve diaphragm is able to balance and regulate crankcase pressure in response to variations in the pressure inside the crankcase. It guarantees regular engine functioning and keeps the crankcase from overpressurizing.
  2. Environmental protection and exhaust gas emissions: To lessen gas buildup inside the crankcase and exhaust gas emissions, the crankcase vent valve diaphragm can open, allowing exhaust gasses to be released into the atmosphere. This satisfies emission regulations and environmental protection mandates while assisting in the reduction of vehicular pollution to the environment.
  3. Prevent outside contaminants from entering the crankcase: The crankcase vent valve diaphragm performs a very good job of sealing off outside contaminants including dust, moisture, and impurities. This lessens the risk of corrosion and damage to internal engine parts.
  4. Boost fuel economy and combustion efficiency: The crankcase vent valve diaphragm helps lower fuel consumption and boost combustion efficiency by regulating the pressure inside the crankcase. It lowers running expenses for vehicles and increases engine fuel efficiency.
  5. Durability and reliability: Crankcase vent valve diaphragm is usually made of chemically resistant rubber material and has good durability and reliability. It requires less maintenance and replacement since it can function steadily for an extended period of time in a variety of operating environments.
  6. Simplified installation and design: The design is rather straightforward and simple to produce and implement. It may work well with other system parts to produce effective system functioning. It is often employed as one of the main parts of the crankcase breather valve.

Conclusion

An imperative rubber part of car engines’ ventilation systems, the crankcase vent valve diaphragm regulates pressure balance and lets out exhaust fumes. It keeps the proper pressure within the crankcase since it is made of soft rubber. It successfully regulates crankcase pressure, guarding against overpressurization and guaranteeing proper engine running. In addition to lowering environmental pollution and exhaust gas emissions, it also keeps outside contaminants out of the crankcase and increases fuel economy and combustion efficiency. The diaphragm requires less upkeep and replacement since it is robust and stable, functioning steadily under a variety of circumstances. It is an essential part of the crankcase breather valve because of its straightforward construction and simple installation.