止回阀

If the boiler don't close the check valve, then must prevent back flowing to the boiler, valve clack mould weight and buffering piston can seal under gravity action, they make steam and condensed water can't flow back to the boiler under the low air pressure.

如果锅炉没有关闭截止止回阀，则必须防止回流到锅炉上，阀瓣压铁和缓冲活塞，在重力的作用下，能够迅速实现密封，使得蒸汽和冷凝水即使在低压下也不会回流到锅炉里。

With the affects of tgravity, the valve clack and damper piston can get sealed immediately that steam and condensed water won't refluence to the boiler even in an atomosphere of low pressure.

如果锅炉没有关闭截止止回阀，则必须防止回流到锅炉上，阀瓣压铁和缓冲活塞，在重力的作用下，能够迅速实现密封，使得蒸汽和冷凝水即使在低压下也不会回流到锅炉里。

Thoroughly clean the seat area and clapper sealing surfaces of both Checks.

彻底清洗两个止回阀的阀座面和阀瓣密封面。

The last time when the valves open and close the boundary condition equation and heating systems in the other boundary condition equations, one-dimensional unsteady flow equations of motion and the joint solution of continuity equation, we can find the non-dimensional opening when the valve changes, heating system to calculate changes in surface pressure.

上回阀启闭时的边界条件方程与供热系统中的其它边界条件方程、一维不定常流动的运动方程和连续方程联解，就可以求出当止回阀无量纲开度变化时，供热系统各计算截面压力的变化情况。

The TDV combines the functions of a positive hand-tight shutoff valve, check valve, and flow control valve into one versatile package, and eliminates the need to utilize three separate valves on the pump system.

系列TDV将绝对手动紧密关闭阀、止回阀和流量控制阀的功能组和在一个多功能的装置内，不需要在泵系统中采用三个独立的阀门。

Type YZF duck-billed valve, also be called "rubber flexible check-valve", it has function similar to tide gate, flapper gate but its working principle and structure is different, its mounting pattern is generally classed to pipe hoop form and flange form( flange form is generally used in case that latus rectum is larger than DN800, otherwise pipe hoop form is used).

YZF 型鸭嘴阀，又称"橡胶柔性止回阀"，与潮门，拍门功用相似，但工作原理和结构不同，其安装形式一般分为管箍式和法兰式（法兰式一般大于通径 DN800，管箍式一般小于通径 DN800），本体材质为橡胶，可广泛用于排水管出口，防止水流倒灌，造成事故。

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。

To avoid this discharge, install a spring-loaded, rubber seated check valve ahead of the backflow assembly.

为了避免这种排放，要在防回流阀总成前面安装一个弹簧驱动、橡胶阀座的止回阀。

To avoid this discharge, install a spring-loaded rubber seated check valve ahead of the backflow assembly to " lock-in " the downstream pressure.

为了避免这类排放，要在防回流阀总成前安装一个弹簧负载橡胶阀座止回阀来"锁定"下游压力。

Reversible seat disc rubber, extends check valve life

可逆阀座阀瓣橡胶，延长止回阀寿命

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了