美国采购需求：气动组合件、气缸、电磁阀、气动管件、液压元件、气缸

I'm reaching out regarding a replacement request for a unit associated with an Amazon order from late February 2026. Unfortunately, I have encountered several issues that need immediate attention. Firstly, there's an air leak through the adjustment valve, which is making the unit completely unusable. Secondly, even though my air compressor shuts off at 145 PSI, this valve displays only 87 PSI, which seems off. Additionally, I've found that I can't adjust the air pressure effectively because the continuous air leak prevents any proper setting. I would appreciate your guidance on how to resolve these problems as soon as possible. Thank you for your support and help in getting this matter sorted out promptly.