斯派莎克BRV73直接作用式減壓閥簡(jiǎn)介
BRV71和BRV73為球墨鑄鐵材質(zhì)的直接作用式減壓閥，前者為螺紋連接，或者為法蘭連接。主要用于蒸汽系統(tǒng)。結(jié)構(gòu)緊湊，設(shè)計(jì)簡(jiǎn)單，表面高質(zhì)量的無(wú)電極涂鎳處理。與BRVZ系列減壓閥相比，BRV71和BRV73內(nèi)有壓力平衡波紋管，可以平衡主閥頭上的壓差。主閥為平面密封，具有自清洗功能。
工作原理
1、開(kāi)始時(shí)，回復(fù)彈簧將閥關(guān)閉，蒸汽壓在閥芯表面及波紋管表面（兩者面積相等）施于相等的壓力。
2、如在此時(shí)以順時(shí)針的方向轉(zhuǎn)動(dòng)調(diào)壓手柄，控制彈簧會(huì)因受壓而向下迫使閥桿將閥芯推離閥座使蒸汽流通進(jìn)入下流側(cè)。
3、下游壓力會(huì)經(jīng)閥芯下的感應(yīng)孔進(jìn)入感應(yīng)室迫使控制波紋管向上延伸。同事也向下面的壓力平衡波紋管施壓消除閥芯背面的下游壓力的影響。
4、當(dāng)施加在控制波紋管的下游壓力大于彈簧的控制力量時(shí)，推動(dòng)主閥桿及閥芯向上移動(dòng)使閥關(guān)閉，在正常情況下，閥會(huì)維持在一定的高度，依不同的壓力變化和負(fù)載條件做小幅度調(diào)整
Spirax sarco Introduction
BRV71 and BRV73 as the direct effect of ductile iron valve, which is threaded connection, flange connection or for. Mainly used for steam system. Compact structure, simple design, high quality surface without electrode coated nickel processing. Compared with the BRVZ series valve, BRV71 and BRV73 within apressure balanced bellows, can balance the pressure difference on the main valve head. The main valve is a plane sealing, with self cleaning function.
Working principle
At the beginning of 1, a return spring, the valve is closed, the spool surface and surface vapor pressure bellows (both with equal area) is applied to theequal pressure.
2, as in the time in a clockwise direction of rotation regulating handle, control spring due to pressure forces the stem of the valve core is pushed off from the valve seat so that the steam flow into the downstream.
3, the downstream pressure via the induction hole valve core under theinduction chamber into the corrugated tube extending upward force control.Colleagues pressure balancing corrugated pipe pressure to eliminate theinfluence to the downstream pressure of the valve back.
4, when the control force is applied in the control of downstream pressurebellows is greater than the spring, push the main valve rod and a valve core to move the valve closed, under normal circumstances, the valve will be maintained at a certain height, according to different load conditions andpressure changes in the small adjustment
Spirax-Sarco valve mechanism for B4 series 15lb.inverted bucket steam trap.
Spirax-Sarco valve mechanism less bucket is the device that allows the condensate and air to drain from the trap. The mechanism is a lever and seat operation, it is held in place by screwing the seat into the outlet port within the trap. With the inverted bucket attached to this mechanism, the steam pressure within the bucket keeps the lever up in turn keeping the seat closed when steam is present. When the steam cools and turns to a liquid state (condensate), the trap fills with condensate causing the bucket to drop and this opens the seat to allow the condensate and air to drain.
斯派莎克直接作用式減壓閥BRV73閥門(mén)機(jī)制B4系列15lb.inverted吊桶式疏水閥。
斯派莎克直接作用式減壓閥BRV73機(jī)構(gòu)少鏟斗裝置，使冷凝水和空氣從陷阱排出。該機(jī)構(gòu)是一個(gè)杠桿和座椅的操作，它在適當(dāng)?shù)奈恢猛ㄟ^(guò)螺紋連接在座椅進(jìn)入出口端口陷阱內(nèi)舉行。與連接到這個(gè)機(jī)制倒斗，斗內(nèi)的蒸汽壓力保持桿，反過(guò)來(lái)保持座位關(guān)閉時(shí)蒸汽存在。當(dāng)蒸汽冷卻并變成液體狀態(tài)（冷凝），陷阱充滿(mǎn)冷凝水造成杯水車(chē)薪，這將打開(kāi)座椅，讓冷凝水和空氣排出。
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