一种插装式、直接作用、提升型直列式止回阀。主要用途是阻塞或负载保持装置。该阀允许流通过端口 2 至 1：插装阀具有全导向阀芯，偏置弹簧是关闭的，直到在端口 2 处施加足够的压力以打开到 1。油流在相反的方向上被阻挡（1 至 2）。 A screw-in, direct acting, poppet type in-line check valve. Main use is as a blocking or loadholding device. The CVR0 allows flow passage from port 2 to 1: the cartridge has a fully guided check which is spring-biased closed until sufficient pressure is applied at port 2 to open to 1. The flow is blocked in the opposite direction(1 to 2)