| Structure Classification | Diaphragm check valve, duckbill check valve, spring check valve — three types optional |
|---|---|
| Key Specification | Hose check valve, diaphragm plug-in preventing backflow. |
| Description | Silicone+PP or FKM+PVDF. |
| Features | Opens and closes automatically by medium flow and force to prevent backflow; mainly used on pipelines with unidirectional medium flow, allowing flow in only one direction and preventing reverse flow |
| Applications | Laboratory automation, analytical instruments, pharmaceutical, biotech, OEM |
| Certifications | Manufactured under ISO 9001 QMS · CE/RoHS/FDA compliance varies by model (certificates available upon request) |
FTG-CHK-VLV 是一款软管单向阀。膜片/鸭嘴/弹簧三种型式，自动防回流。
支持哪些螺纹标准？
多数接头采用 1/4-28UNF；部分增加 M6、M8、M10、10-32UNF 或 6-40UNF。订购前请核对各型号的规格表。
能否连接不同管径？
可以。使用异径接头或硬-软管适配器、多通接头来连接不同直径。
这些接头耐化学腐蚀吗？
耐。PP、PTFE、PEEK、PPS 本体可抵抗常见溶剂；请针对具体型号确认介质兼容性。
是否提供安装工具？
提供。扭矩手动拧紧工具套件与 PEEK/PTFE 切管器作为配件，确保密封可靠。
This product is sourced factory-direct from a certified Chinese manufacturer. You pay the factory price — no markup. Our income comes from the export tax rebate, not from your bill.