Where an air distribution valve manifold is used and its air sub-header shutoff valve is not accessible from the manifold, a shutoff valve at the manifold shall be provided. 如果使用了空氣分布閥門(mén)集管，其空氣分支總管切斷閥不應通過(guò)此集管，而應為集管安裝切斷閥。
Each instrument requiring an air supply shall be supplied with an individual combination air filter and relief type reducing regulator and an adjacent individual shutoff valve. 要求使用儀表風(fēng)的每個(gè)儀表應配備單獨的混合空氣過(guò)濾器和泄壓型調壓閥及相鄰的單獨切斷閥。
