Flat face couplings are suitable for use in applications involving dusty or dirty environments and where oil loss on disconnection cannot be tolerated. HQ series couplings are designed for use in applications involving high pressure pulses. H series couplings meet the needs of applications where the duty cycle is less demanding and environment less aggressive.
![High school student who sings Okinawan folk songs [to-sin-do-ii] 沖縄民謡「唐船どーい」北谷高校の生徒さん達。](https://i.ytimg.com/vi/yhBSiX-_c4k/mqdefault.jpg)
