The operation method, characteristics and notice items of the static pressure test through the height difference between the in and out nozzles of the in-service pressure vessel are introduced. The difficult problems for hydrostatic test of certain kinds of the in-service pressure vessel have been solved ingeniously. And the overhaul cost and maintenance difficulty of in-service pressure vessel have been reduced efficiently.

論述了利用某些在用壓力容器出入口連接管線達(dá)到一定高度差可產(chǎn)生的靜壓強進(jìn)行水壓試驗的作業(yè)方法、特點和注意事項亚洲天堂黄色网站b性爱，巧妙解決了某類容器不易進(jìn)行水壓試驗的難題另类小说人亚洲小说，有效降低了壓力容器的檢修難度和費用。

The invention relates to a desk type drill machine for preventing drill head wreckage, comprises chassis, supporting post, operating board covered in middle of supporting post, cabinet and generator; cabinet is equipped with tension pulley pressure sensor, belt tension unit and pressure foil gage; tension pulley is compacted on driving belt of drill machine, pressure foil gage is installed on top bar of tension pulley, the pressure foil gage is in electric connection with input end of controlling circuit, output controlling end of controlling circuit is connected to power input end of generator.

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This company is specialized in developing , researching and producing pipe fittings for machine industry including valves, hydraulic instant joints, 1-way valve, stop valve, pressure gauge switch, rubber pipe assemblies for pneumatic hydraulic pipe system (low-pressure, middle-pressure, high-pressure) industry.

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In the steam injector with pressure-gain, the water gains pressure by the power of steam. The outlet water pressure is higher than the inlet steam pressure.

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The research results show that the steam inlet pressure and water inlet temperature are the main factors which affect the lifting-pressure performance; the steam injector have the characteristics of self-adaptive outlet pressure and constant outlet flow rate; the theoretical maximum lifting-pressure coefficient calculated could be high as 14 and the experimental value is 3.0, which could be high as 1.5 even if the water inlet temperature is high as 95℃. The noise of steam injector could be induced from 80db to 50db.

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Selection of safety valve Decided by the operating pressure safety valve nominal pressure, the decision by the operating temperature range of temperature safety valve from the computed value of the decision constant pressure safety valve spring or a lever set pressure range, then the safety valve according to the decision to use media materials and structure type, and then calculated according to the safety valve Discharge valve throat diameter.

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The main product categories: PEM standard parts: pressure riveting nut; pressure riveting nut column (SO, SOO, BSO-type); insert nut; pressure rivets; pressure riveting screw ; floating nut; Squeeze Nut; grounding nut column; spring screws; positioning shoring holders; positioning pin and so on.

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Main products: Pressure riveting screw, nut riveting pressure, pressure riveting nut -, Inserts into the nut, rose riveting nut, floating nut, ground-nuts, nut-squeezing, Spring screws, self-locking nut, positioning support columns, targeted marketing, sales support cards, in spring, the combination of screws, rivets hollow, as well as various Pressure riveting type of plastic fasteners, etc.!

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When the external control pressure increases to the shutoff pressure setting point of the valve, the external control pressure acting on the underside of the diaphragm, which breaks the balance of the compression of the pressure spring and the latch lever, triggers the latch and disengages valve disc arm from the latch.

當(dāng)外接控制感應(yīng)壓力﹝即減壓下游壓力﹞升到此閥關(guān)斷壓設(shè)定點時，控制壓作用于皮膜下層破壞壓力彈簧壓縮與閂桿間的平衡www.nlvnja.com，然后扳開閂扣并從閂扣釋放閥門封盤。