请确定所更换阀门的尺寸。
由于不用压井就能更换阀门，还不会对油井含油地层造成破坏，从而更好地保护了油气层。
As the valve can be replaced with pressure balance and the oil layer of the oil well can not be damaged, the oil and gas layer is better protected.
航天飞机发动机内的这三个阀门不断被更换，以确保它们是最有效的，能保障飞行的安全。
The three valves in the shuttle's engine compartment kept being replaced to ensure they were the best available and safe to fly.
评论：当与这些阀门一起工作时，使用良好的钢瓶更换程序是非常重要的。
Comments: When working with these valves it is very important to use good cylinder change out procedures.
重力球形止回阀可以变为通风阀，只需用漂浮球体更换标准球体，然后在安装时将阀门倒置，使其阀座向上即可。
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.
在选择更换部件之前，应该正确辨认阀门的种类。
The valve should be properly identified before selecting replacement parts.
核电阀门的维修、更换费用在核电站维修总额中约占50%。
Nuclear power valve repair, replacement nuclear power plant maintenance in the total cost of about 50%.
这使得肮脏的阀门更换件可以配置新的阀体，并且可以与旧的管接螺母相配套。
This permits fouled valve replacement with a new body cartridge, which will fit the old union nuts.
对于工厂组装装置，用长度代码更换型号中最后的3个零。请参阅热塑性塑料阀门、过滤器和附件，价格目录V-1了解长度代码。
For factory assembled units replace last 3 zeros with length code. See Thermoplastic Valves, Strainers & Accessories, Price Schedule V-1 for length codes.
当阀门预备维修时应该订购备用更换套管。
A spare replacement sleeve should be placed on order when this valve is placed in service.
按橡胶密封圈使用性能，根据具体情况定期对阀体的密封圈进行更换，以保证阀门的密封性能。
Exchange the sealing ring of the valve body according to the working condition of rubber sealing ring in order to ensure the sealing performance.
钢瓶更换和正确操作的良好程序在最大程度减少这种阀门的问题方面也是很关键的。
Good procedures for cylinder and proper operation are also key in minimizing problems with this valve.
因此，一个聚四氟乙烯隔膜不能用作配置三元乙丙橡胶阀内件的阀门的更换件。
Therefore, a PTFE diaphragm cannot be used as a replacement in an EPDM trimmed valve.
但是，一个三元乙丙橡胶隔膜可以用作配置聚四氟乙烯阀内件的阀门的更换件。
But an EPDM diaphragm may be used as a replacement in a PTFE trimmed valve.
阀瓣支架可拆卸进行阀瓣更换，无需拆卸阀门，不需要特殊工具。
Disc holder removable for replacement of disc without dismantling the valve - no special tools required.
用不到10分钟的时间就可以很容易地更换一个口径为DN 100的阀门。
A valve of size DN 100 can be easily exchanged within less than 10 minutes.
阀杆与阀盖之间带倒密封结构，便于阀门带压更换阀杆填料。
Valve rod with valve lids between bring fall airproof structure, Convenients for valve bring press replacing valve stem packing.
清洗：检查或更换磨损的阀门阀瓣，断开控制管线，采用钝工具和锤打阀盖凸耳从阀体上旋下阀盖。
To CLEAN: Inspect or replace worn valve disc, disconnect control pipe and unscrew bonnet from valve body using blunt tool and hammer on bonnet lugs.
这使得人们可以用新的阀腔更换肮脏的阀门，新旧管接螺母能够互相配合，不需要改变管道长度。
This permits fouled valve replacement with a new body cartridge, which will fit the old union nuts. No change in piping length is required.
阀门阀瓣可以迅速更换。
可更换软管过滤器和阀门阀杆密封，使得现场应用可靠行更高。
Replaceable hose filter and valve stem seals for field reliability.
大多数阀门上的填料旋启式螺栓简化了填料的更换。
Packing swing bolts on most valves simplify packing replacement.
可更换的阀座延长了阀门的使用寿命。把阀门从管路上拆卸下来后，可以轻松地更换弹性阀座(细节请参阅第12页)。
Replaceable seat extends the service life of the valve. Resilient seats can be easily replaced after removing valve from the line (Details on page 12).
可更换不锈钢阀座和阀门阀瓣。
因此，这种TrueUnion结构使得人们可以用新的阀腔更换肮脏的阀门，新旧管接螺母能够互相配合，好像永久性连接着邻近的管道上。
Thus, the True union design permits the replacement of a fouled valve with a new body cartridge, which will fit the old union nuts that are likely to be permanently attached to adjacent piping.
因此，这种TrueUnion结构使得人们可以用新的阀腔更换肮脏的阀门，新旧管接螺母能够互相配合，好像永久性连接着邻近的管道上。
Thus, the True union design permits the replacement of a fouled valve with a new body cartridge, which will fit the old union nuts that are likely to be permanently attached to adjacent piping.
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