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1·The transfer line should be equipped with a non-return valve or other suitable alternative.

转移管线上须配备止回阀之类的装置。

2·First: to act as an automatic non-return valve by preventing a backflow of steam from the main steam header to the boiler.

首先，能过作为一个自动逆止阀，防止蒸汽从主蒸汽加热器上倒流到锅炉里。

3·Headstock piece on media flows and forces open or closed to prevent backflow valve media called a non-return valve.

启闭件靠介质流动和力量自行开启或关闭，以防止介质倒流的阀门叫止回阀。

4·If this can not be avoided it is recommended to install either an simple thermostat close to the inlet which switches OFF the VOD or a non-return valve between the contact system and the VOD.

如果这个不能避免(的话)，这里建议在靠近入口处安装一简易恒温器来切断VOD，或在接触设备与VOD之间设置一逆止阀。

5·Method 1: Change into a new non-return valve; prolong the holding time, if there is still no melt cushion, it means the cylinder is broken.

方法一：换上新的止回阀，延长保压时间依然没有料垫，则说明料筒损坏。

6·The sealing sections of non-return valve ball seat were separated, material was changed into zirconium oxide ceramic, 0.

通过分离单向阀球座密封段，材料改为氧化锆陶瓷，密封段流道直径增加0。

7·Can be installed or custom built non-return valve function of the valve.

可安装止回阀或订制自带止回功能的阀。

8·Water pumps at the end of the relevant type of valve is also a non-return valve.

水泵吸水关的底阀也属于止回阀类。