Slamming of check valves is the result of failure of the valve disc to reach its closed position before the fluid flow reversal.

止回阀的撞击现象，是由于在流体倒流之前，阀门的阀瓣没有到达关闭位置造成的。

Requirements: the pressure differential relief valve must operate to maintain the 「zone」 between the two check valves at least 2 PSI less than the supply pressure.

要求：压差安全阀必须具有将两个止回阀之间的「区域」压力维持在比供应压力低至少2 PSI的功能。

The characteristics of closing check valves with hanged reducing water - hammer, and the effects of fluid transient during power cut are studied in this paper.

本文详细研究了悬挂式缓闭减水锤止回阀在事故停泵期间的特性以及由停泵所引起的流体瞬变效应与阀的减水锤效果。

Valve shall have a bronze body, include integral check valves and operate so the thermostat controls the cold and hot water ports.

这种阀门应该具有青铜阀体，包括整合的止回阀，使得温度控制装置能够控制冷水和热水端口。

Note: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.

注意：在泵排泄口，首选的止回阀是管内弹簧负载，带杠桿和压铁或杠桿和弹簧的旋启式止回阀。

Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation-with seat up.

重力球形止回阀可以变为通风阀，只需用漂浮球体更换标準球体，然后在安装时将阀门倒置，使其阀座向上即可。

NOTE: On pump discharge, the preferred check valves are an in-line spring loaded, swing design with lever and weight or lever and spring.

注意：在泵的排泄口处，首选的止回阀是管内弹簧负载，旋启式，配置杠桿和重量或杠桿和弹簧。

On pump discharge, the preferred check valves are in-line spring loaded, swing design with lever and weight or lever and spring.

在泵出口处，首选止回阀是管内弹簧负载，配置杠桿和重量旋启式结构，或杠桿和弹簧旋启式结构。

All input ports on the manifold have internal check valves to seal off the input signal (s) if a transducer is removed from the manifold.

流形上的单向阀的内部封锁的输入信号(拧)如果换能器是由多方面删除所有输入端口。

Shipbuilding . sea water valves . screw - down stop - and - check valves with opening mechanism . pattern iv . operating mechanism parts list.

造船工业。海水专用阀门。带打开机构的螺桿向下止动和止回阀。式样。操作机构零件细目表。

Fixed firefighting systems - Components for gas extinguishing systems - Part 13: requirements and test methods for check valves and non-return valves.

固定消防系统。气体灭火系统用元件。第13部分：止回阀要求和试验方法。

Swing check valves are best suited for moderate velocity applications.

旋启式最适用于中流速应用环境。

Seats and seat discs shall be replaceable in both check valves and the relief valve without the use of special tools.

两个止 回阀和安全阀的阀座和阀座阀瓣应该是可更换的，更换过程不需要特殊工具。

NOTE: On pump discharge, the preferred check valves are in-line spring loaded, swing design with lever and weight or lever and spring.

注意：在泵出口处，首选止回阀是管内弹簧负载，配置杠桿和重量旋启式结构，或杠桿和弹簧旋启式结构。

Reduced Pressure Zone Assemblies must be inspected and tested periodically, in accordance with local codes, to ensure proper operation of check valves within the unit.

减压区总成必须按照当地有关规定定期检查和测试，以确保这种装置内的止回阀能够正常运行。

Globe pattern check valves should be used in horizontal pipe runs with the stem straight up.

截止阀结构的止回阀应该用于水平管道，阀桿垂直朝上。

Swing check valves are used to prevent reversal of flow in horizontal or vertical pipe lines.

旋启式止回阀用于防止水平管路或垂直管路的流体倒流。