液压阀一般采用密封件或密封设计，以确保阀芯和阀体在任何工作环境中均保持密封性，因此不会因污染而损坏机器表面；在检修维护方面也比较简单快捷如需更换油件时只需将阀取出即可液压油过滤器可防止杂质进入油室引起污染；检查管路是否堵塞，如有必须及时更换；检查滤网是否堵塞；检查压力，和油量是否正常；检查各种管道是否有损坏；检查阀门是否工作正常；检查油是否变质；检查油泵是否正常运转；液位监测设备是否正常运行；液面高度是否正常；气缸盖是否堵塞；其他影响等等；并与其他系统相互连接以实现更好的保护作用。

液压阀阀有：阀体和阀芯、阀杆密封圈、阀杆、螺栓、螺纹、止回阀、柱塞、滑块、密封垫圈等形式；阀体材质有石墨、不锈钢、合金等；阀体可在真空或常温下加热使用；高压密封用在需要承受高温和高压等工作环境的液压场合；阀体结构合理、设计新颖、使用方便等；有许多选择；根据具体行业（或领域）需求将液压阀分为单阀；双密封阀；三通阀；旋塞阀；电磁阀等；根据密封形式分为气动元件（有气阀、截止油阀等）、阀杆密封、阀体密封类、密封件与油封等；按是否用填料分为密封填料式两类；主要有填料环、滑环等多种形式；高压密封材料通常是氟、氟碳等氟材料；各种表面处理;(如涂料等);玻璃纤维增强塑料等材料。

高压泵；高压胶管和螺旋管等弹性体材料；橡胶和塑料等弹性体材料；复合材料等高强度材质；低粘度介质、耐高压、耐热（耐）低温、耐腐蚀（耐臭氧),耐高温、耐腐蚀、耐油蚀等各类液压系统所用元件不会因腐蚀而失效 90-R-075-KN-1-AB-60-R-3-S1-D-03-GBA-29-29-24 90R075KN1AB60R3S1D03GBA292924 90-R-075-KN-1-AB-60-R-3-S1-D-03-GBA-35-35-24 90R075KN1AB60R3S1D03GBA353524 90-R-075-KN-1-AB-60-R-4-S1-D-03-GBA-35-35-24 90R075KN1AB60R4S1D03GBA353524 90-R-075-KN-1-AB-80-L-3-S1-E-03-GBA-32-32-24 90R075KN1AB80L3S1E03GBA323224 90-R-075-KN-1-BC-80-D-4-S1-L-03-GBA-29-29-24 90R075KN1BC80D4S1L03GBA292924 90-R-075-KN-1-BC-80-P-4-S1-E-00-GBA-35-35-24 90R075KN1BC80P4S1E00GBA353524 90R075-KN-1-BC-80-P-4-T2-E-00-GBA-35-35-24 90R075KN1BC80P4T2E00GBA353524 90-R-075-KN-1-BC-80-P-4-T2-E-00-GBA-35-35-24 90R075KN1BC80P4T2E00GBA353524 90-R-075-KN-1-BC-80-R-3-S1-E-03-GBA-29-29-24 90R075KN1BC80R3S1E03GBA292924 90-R-075-KN-1-BC-80-R-4-S1-D-03-GBA-20-20-24 90R075KN1BC80R4S1D03GBA202024 90-R-075-KN-1-BC-80-R-4-S1-D-03-GBA-29-29-24 90R075KN1BC80R4S1D03GBA292924 90-R-075-KN-1-CD-60-L-3-C7-D-03-GBA-35-35-24 90R075KN1CD60L3C7D03GBA353524 90-R-075-KN-1-CD-80-R-4-S1-D-03-GBA-20-20-24 90R075KN1CD80R4S1D03GBA202024 90-R-075-KN-1-CD-80-R-4-S1-D-03-GBA-42-14-24 90R075KN1CD80R4S1D03GBA421424 90-R-075-KN-1-CD-80-S-4-S1-C-03-GBA-35-35-24 90R075KN1CD80S4S1C03GBA353524 90R075-KN-1-CD-80-S-4-S1-C-03-GBA-35-35-24 90R075KN1CD80S4S1C03GBA353524 90-R-075-KN-1-NN-60-L-3-S1-D-03-GBA-35-35-24 90R075KN1NN60L3S1D03GBA353524 90-R-075-KN-1-NN-60-R-3-S1-D-03-GBA-35-35-24 90R075KN1NN60R3S1D03GBA353524 90R075-KN-1-NN-60-R-3-S1-D-03-GBA-35-35-24 90R075KN1NN60R3S1D03GBA353524 90-R-075-KN-1-NN-60-R-4-S1-D-03-GBA-38-38-24 90R075KN1NN60R4S1D03GBA383824 90-R-075-KN-1-NN-80-P-3-S1-D-03-GBA-17-17-24 90R075KN1NN80P3S1D03GBA171724 90-R-075-KN-1-NN-80-R-4-S1-C-03-GBA-42-42-24 90R075KN1NN80R4S1C03GBA424224 90-R-075-KN-1-NN-80-R-4-S1-D-03-GBA-20-20-24 90R075KN1NN80R4S1D03GBA202024 90-R-075-KN-1-NN-80-R-4-S1-D-03-GBA-29-29-24 90R075KN1NN80R4S1D03GBA292924 90-R-075-KN-1-NN-80-R-4-S1-D-03-GBA-42-42-24 90R075KN1NN80R4S1D03GBA424224 90-R-075-KN-1-NN-80-R-4-T1-D-03-GBA-21-21-24 90R075KN1NN80R4T1D03GBA212124 90-R-075-KN-1-NN-80-S-4-S1-D-03-GBA-29-29-24 90R075KN1NN80S4S1D03GBA292924 90-R-075-KN-1-NN-80-S-4-S1-D-03-GBA-35-35-24 90R075KN1NN80S4S1D03GBA353524 90R075-KN-2-BC-60-R-3-S1-D-03-GBA-42-42-24 90R075KN2BC60R3S1D03GBA424224 90-R-075-KN-2-BC-60-R-3-S1-D-03-GBA-42-42-24 90R075KN2BC60R3S1D03GBA424224 。