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.

上回閥啟閉時的邊界條件方程與供熱系統(tǒng)中的其它邊界條件方程亚洲熟女福利、一維不定常流動的運(yùn)動方程和連續(xù)方程聯(lián)解v视界影院，就可以求出當(dāng)止回閥無量綱開度變化時2021国产精品露脸在线，供熱系統(tǒng)各計算截面壓力的變化情況亚洲黄色视频免费。

The pressure discharge ability for the heating system with circle water pump parallel connected side connecting line with different diameter has been calculated and compared. Resalable diameter for side connecting line is defined to ensure system safety, mainly for radiator safety at heat users, when the pump is off.

對上述所產(chǎn)生的水擊，該供熱系統(tǒng)循環(huán)水泵并聯(lián)不同管徑的旁通管及使用不同型式的止回閥国产精品高清无码，計算其泄壓能力并對結(jié)果進(jìn)行比較分析久久黄色一级A片，確定合理的旁通管管徑，使其供熱系統(tǒng)在停泵時保證系統(tǒng)的安全H漫无遮挡全彩纯肉动漫，主要是熱用戶處的散熱器的安全精品日韩欧美一区二区久久。

Therefore, no more than DN50 (2in) of the pipeline, for frequently changing the flow of cleaning fluid is a better 5, since the balance, axial piston, non-automatic check valve is recommended to use the pipeline in the 針型閥 flow fluctuations, such as reciprocating compressors and pumps export pipeline.

因此，在不大于DN50（2in）的管道中先锋资源网站在线，對于頻繁地改變流向的清潔流體是比較好的 5劲爆A片免费网址、自平衡，軸向活塞永久免费的毛片视频网站，非自動式止回閥人人操必人人操，推薦用在流量波動的管道中，如往復(fù)式的壓縮機(jī)和泵的出口管道有什么网址可以看毛片。

The valve packing Manufacturer or to the FORGED STEEL VALVES packing company's technical department or consult the relevant provisions of torque compression percentage, the following steps to tighten the squeeze cap nut:(1) applied to the gland nut torque to full torque of 30% or the percentage compression of the party;(2) repeatedly open and close valves several times, when the valve is in the closed position, to exert all the torque;(3) Repeat steps (2) 3 or 4 times.

閥門用盤根向盤根制造商或企業(yè)的技術(shù)部門止回閥咨詢有關(guān)扭矩的規(guī)定或壓縮百分比日韩特级无码毛片免费视频，按以下步驟擰緊壓蓋螺母：（1）向壓蓋螺母施加扭矩至滿扭矩的30%或是黨的壓縮百分比；（2）反復(fù)開閉閥門數(shù)次亚洲欧美高清色码，當(dāng)閥門處于蝶閥關(guān)閉位置時欧美福利网站大全，施加全部扭矩；（3）重復(fù)步驟（2）3或4次国产极品主播粉嫩福利在线。

In the invention, the water outlet of a circulating pump is connected with the water inlet of a solar energy collector; a water check valve is arranged on a water circulating pipe between the water outlet of the circulating pump and the water inlet of the solar energy collector; the water outlet of the solar energy collector and the water outlet of a water supply pump are connected with the water inlet of a heating coil; the water inlet of the circulating pump and the water inlet of a drain pump are connected with the outer outlet of the heating coil; the water inlet of the water supply pump is connected with the water outlet of a water storage tank; and the water outlet of the drain pump is connected with the water inlet of the water storage tank.

本發(fā)明的循環(huán)水泵的出水口與太陽能集熱器的入水口連接久久99精彩视频，水止回閥設(shè)置在循環(huán)水泵的出水口與太陽能集熱器的入水口之間的水循環(huán)管路上，太陽能集熱器的出水口和補(bǔ)水泵的出水口都與加熱盤管的入水口連接大秀视频网，循環(huán)水泵的入水口和泄水泵的入水口都與加熱盤管的出水口連接午夜亚洲视频，補(bǔ)水泵的入水口與儲水箱的出水口連接，泄水泵的出水口與儲水箱的入水口連接,入级性交片。

Authors I have observed two projects have been completed, the interior pipe leaks water main pipe at the interface capillary action of water leakage, as well as contacts at one end and Atmospheric Test drainage valves and pump check valve leakage of water exports.

作者本人曾觀察過兩個已竣工的工程超碰97公开免费在线，室內(nèi)管道的泄漏水主要在管道的接口處毛細(xì)作用滲漏水，以及一端與大氣接觸的試驗排水閥門和水泵出口止回閥的泄漏水量欧系a片黄片。

The Yongjia County great wild goose China valve Limited company is situated at the good communications superiorly, the humanities environment "township of the Chinese pump valve"- the cup northern town, this company specialized production seals the ball valve, the biased half ball valve hardly, low, high-pressured plate gate valve, oil field special-purpose valve, throttle cut-off valve, high-pressured check valve's specialized enterprise.

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The Yongjia County great wild goose China valve Limited company is situated at the good communications superiorly, the humanities environment "township of the Chinese pump valve"- the cup northern town, this company specialized production seals the ball valve, the biased half ball valve hardly, low, high-pressured plate gate valve, oil field special-purpose valve, throttle cut-off valve, high-pressured check valve's specialized enterprise.

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Removable seat preference should be given, because they are easy maintenance, and easy to replace the valve seals Swing check valves should be used one kind of screws or bolts to connect the valve cap for inspection and repair of disc and seat.

可拆卸的閥座應(yīng)優(yōu)先選用亚洲黄一级色视频，因為它們?nèi)菀拙S修黄色视频精品在线，而且便于更換閥中的密封件旋啟式止回閥應(yīng)該選用一種螺絲或螺栓連接的閥帽，以便檢查和修理閥瓣和閥座国产精品熟女视频一区二区。

The assemblies, discussed on the preceding page and seen in the split-view drawing on this page, are to be installed on the supply side of a standard Chemtrol Ball Check Valve, replacing the union nut and end connector.

這種組件玖玖玖玖久久玖玖玖玖玖玖爱，正如上一頁所討論的，以及本頁的剖視圖內(nèi)所見欧美性人成三级视频，是安裝在標(biāo)準(zhǔn)Chemtrol球形止回閥的供應(yīng)側(cè)上欧美黑人日韩一级视频在线观看免费，更換管接頭螺母和端口連接件。