or simply, "boosting operation"
方能升压运行 - pressure boosting operation can not be started until ...
《英汉化学化工词汇》：
Boosting - 升压（增压）作用
Boost pressure - 升压；增压

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Note added at 16 hrs (2009-01-21 04:22:50 GMT)
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It seems to me that I need to make further explanations for the term “boosting”. Boosting is a technical jargon that indeed means to increase pressure. It is particularly used when initial pressure is low, e.g., atmospheric pressure. Similarly, we use the term “boost” when a patient or economy is weak. The term “boosting” occurred to me very naturally as I worked in chemical industry for quite a long time. However, I mentioned some dictionary entries just in an attempt to convince others. Now, let’s take a look at more dictionary entries as follows:

1. 《汉英大辞典》
升压 – step up, boost, boosting
升压泵 – booster
升压压缩机 – booster compressor

2. 《汉英化学化工词汇》：
升压 – boost pressure
升压作用 – boosting

(As you may see, the above two dictionaries have not mentioned “pressure increasing” or “increasing pressure” at all although they are not wrong.)

3. Longman Contemporary English-Chinese Dictionary:
Boost - tech, to increase (esp. the supply of electricity or water) in force, pressure, or amount (专技) 增强电压或水压.
Booster - tech, an apparatus that help to increase force, power or pressure (专技) 增压机.

4. 《英汉技术词典》
Booster – 升压器[机].
Boosting - 升[增]压

Now, if we search "pressure boosting operation", "pressure" + "boosting operation" or "boosting operation" on the internet, we will find that the term “boosting” is very commonly used to express “increasing pressure” in relevant technical documents and patents. Let’s just look at one example. Please see page 2 at
http://www.yjblowers.com/download/004.pdf
Methane Gas Boosting and Conveying
ROTARY SCREW GAS COMPRESSOR ENDS
Gardner Denver Rotary Screw Gas Ends are used in CBM collection pods for conveying raw methane gas, or gas line boosting to a sales supply line. These rotary screw compressors are capable of vacuum or pressure boosting up to 350 psig for gas delivery to a central processing facility.

Joyce, if you have any further questions, please feel free to ask. Thank you!


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Note added at 16 hrs (2009-01-21 04:55:18 GMT)
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Joyce, here is my translation of the entire sentence for your reference:

Pressure vessels with a quick-actuating closure should be equipped with a safety interlocking device that meets the following requirement: having such an interlocking control function that pressure boosting operation can not be started until the quick-actuating closure reaches the predetermined closing position.