Win Win waterjet provide many kinds of waterjet parts, OEM/ODM available 

ORO759017/151 o-ring for BFT waterjet 

The frequency of BFT check valve body replacement in a waterjet cutting system can vary depending on several factors, including the quality of the valve body, the operating conditions, and the maintenance and care of the waterjet cutting system. As a general guideline, the BFT check valve body should be replaced at least once every 12 months or 2000 hours of operation, whichever comes first.

Regular inspection and maintenance of the BFT check valve body is an important part of preventive maintenance for the waterjet cutting system and can help identify any potential issues before they cause damage to the system. It is important to inspect the valve body for signs of wear or damage, such as cracks, corrosion, or other visible damage. If any issues are identified, the valve body should be repaired or replaced as soon as possible to prevent further damage to the system.

It is also important to follow the manufacturer's recommendations for maintenance and replacement of the BFT check valve body. Some manufacturers may recommend more frequent replacement or maintenance based on their specific valve body design and operating conditions.

Working with an experienced and knowledgeable technician can help ensure that the BFT check valve body is properly installed and maintained. Regular maintenance and inspection of the BFT check valve body can help prevent issues with the valve body and other components of the waterjet cutting system, ensuring that the system is operating at peak performance and reducing the risk of damage or downtime.