良工閥門的產(chǎn)品線覆蓋閘閥、截止閥、球閥、蝶閥、止回閥等十幾個(gè)品類。面對(duì)這么長(zhǎng)的產(chǎn)品清單，選型的核心邏輯不是“哪個(gè)貴選哪個(gè)”，而是“介質(zhì)怎么流、你要它干什么”。

Lianggong Valve's product line covers more than ten categories including gate valves, globe valves, ball valves, butterfly valves, check valves, etc. Faced with such a long product list, the core logic of selection is not "which one is expensive to choose", but "how the medium flows and what you want it for".

閘閥：全開全關(guān)，不調(diào)節(jié)。 閘閥的閥板像一扇閘門，垂直升降控制通斷。它的優(yōu)勢(shì)是流動(dòng)阻力小，介質(zhì)通過(guò)時(shí)幾乎不改變方向。但閘閥只能“全開或全關(guān)”，不能用來(lái)調(diào)節(jié)流量。良工閘閥適用于石油、化工、電力、水處理等領(lǐng)域，口徑覆蓋范圍大。

Gate valve: fully open and fully closed, without adjustment. The valve plate of a gate valve is like a gate, with vertical lifting control for on/off. Its advantage is low flow resistance, and the medium hardly changes direction when passing through. But gate valves can only be fully opened or fully closed and cannot be used to regulate flow. Lianggong gate valves are suitable for fields such as petroleum, chemical, power, and water treatment, with a wide range of diameters.

截止閥：能調(diào)節(jié)，但阻力大。 截止閥的閥瓣沿閥座中心線升降，介質(zhì)從閥瓣下方進(jìn)入、上方流出，流動(dòng)方向改變。這個(gè)結(jié)構(gòu)讓它適合調(diào)節(jié)流量，但流體阻力比閘閥大。良工的截止閥系列適用于高壓流體介質(zhì)，結(jié)構(gòu)緊湊、操作靈活。直流式截止閥和角式截止閥是兩種特殊變體：直流式流阻小，適合有固體顆粒的管道；角式截止閥安裝在管路拐角處，省掉一個(gè)90°彎頭。

Globe valve: adjustable, but with high resistance. The valve disc of the globe valve rises and falls along the centerline of the valve seat, and the medium enters from below and flows out from above the valve disc, changing the direction of flow. This structure makes it suitable for regulating flow, but the fluid resistance is greater than that of a gate valve. Lianggong's globe valve series is suitable for high-pressure fluid media, with a compact structure and flexible operation. DC globe valve and angle globe valve are two special variants: DC globe valve has low flow resistance and is suitable for pipelines with solid particles; The angle globe valve is installed at the corner of the pipeline, eliminating a 90 ° elbow.

球閥：快開快關(guān)，密封好。 球閥的啟閉件是一個(gè)帶孔的球體，旋轉(zhuǎn)90°即可完成開關(guān)。操作迅速、密封可靠，適合需要快速切斷的場(chǎng)合。良工的球閥系列適用于空氣、水、蒸汽、各種腐蝕性介質(zhì)，是工業(yè)自動(dòng)化領(lǐng)域的重要控制元件。

Ball valve: quickly open and close, with good sealing. The opening and closing component of a ball valve is a ball with holes, which can be opened and closed by rotating 90 degrees. Quick operation, reliable sealing, suitable for occasions that require quick cutting. Lianggong's ball valve series is suitable for air, water, steam, and various corrosive media, and is an important control component in the field of industrial automation.

止回閥：只許“單行道”。 止回閥靠介質(zhì)流動(dòng)的力量自動(dòng)開啟和關(guān)閉，作用是防止管路中的介質(zhì)倒流。良工止回閥尺寸覆蓋DN15到DN500，溫度范圍-60℃到540℃。

Check valve: only allowed on one-way streets. The check valve automatically opens and closes by the force of the medium flow, and its function is to prevent the medium in the pipeline from flowing back. The size of Lianggong check valve covers DN15 to DN500, with a temperature range of -60 ℃ to 540 ℃.

蝶閥：大管徑的經(jīng)濟(jì)選擇。 蝶閥體積小、重量輕，適合大中口徑管道。90°往復(fù)回轉(zhuǎn)即可開關(guān)，驅(qū)動(dòng)力矩小，流道通暢?？捎糜趲腋」腆w顆粒的介質(zhì)。

Butterfly valve: an economical choice for large pipe diameters. Butterfly valves are small in size and light in weight, suitable for large and medium-sized pipelines. Switching can be achieved by reciprocating 90 °, with low driving torque and smooth flow channel. Can be used for media with suspended solid particles.

選型的第一步不是看閥門，是看“介質(zhì)往哪走、要它做什么”。要切斷選閘閥或球閥，要調(diào)節(jié)選截止閥，要防倒流選止回閥，要大管徑選蝶閥。把“用途”說(shuō)清楚，型號(hào)自然就出來(lái)了。

The first step in selecting a valve is not to look at the valve, but to see where the medium goes and what it needs to do. To cut off a gate valve or ball valve, adjust a globe valve, prevent backflow, select a check valve, and select a butterfly valve with a large pipe diameter. Clearly state the 'purpose', and the model will naturally come out.