Material: High-quality marine valves are usually manufactured with high-quality materials, such as stainless steel, bronze, etc., which have better corrosion and abrasion resistance; whereas low-quality valves may be made of substandard materials, which are susceptible to corrosion by seawater and have a shorter service life.

Anti-corrosion coating: high-quality marine valves are usually treated with anti-corrosion coating, which can effectively prevent seawater corrosion; while low-quality marine valves may not be treated with anti-corrosion, easy to rust.

Manufacturing process: high-quality marine valves are manufactured through a rigorous process, with accurate dimensions and good sealing performance; while low-quality marine valves may have poor manufacturing process, inaccurate dimensions or poor sealing performance.

Sealing performance: high-quality marine valves have good sealing performance, to ensure the normal operation of the marine system; while poor quality marine valves may have poor sealing, water leakage and other problems, affecting the safety of the ship.

Service life: high-quality marine valves after strict quality inspection and testing, has a long service life; while poor quality valves may have a short life, easy to damage the problem, increase the ship's maintenance costs.

Price: quality valves are relatively high in price, but stable and reliable performance; while low-quality valves are less expensive, but there is a risk of unstable quality and easy to fail.

After-sales service: high-quality valves are usually from well-known brands or manufacturers with relevant certifications, there is a better guarantee of after-sales service; while poor-quality valves may come from small manufacturers or no brand certification, after-sales service is not perfect.