概述 三通球閥系列對介質(zhì)流向的不同切換要求可分為Q44L型與Q45T型， 如圖A．L型可實現(xiàn)對介質(zhì)流向進行切換，亦可使相互垂直的兩個通道連通或關(guān)閉。 如圖B．T型可實現(xiàn)對介質(zhì)的分流或混流，不僅可以實現(xiàn)介質(zhì)流向的切換， 也可使三個通道互相連通，還可以關(guān)閉任一通道，連通另外兩個通道。 本閥門具有結(jié)構(gòu)緊湊．造形美觀．密封性能好等特點。 Summary According to different switching requirements to the flow direction of medium, three-way ball valve series can be divi-ded into two types:Q44L ａnd Q457. As shown in Fig. A, L-type cannot oniy switch the flow direction of medium but o-nly connect or close two orthogonal pipes. As shown in Fig.B, T type cannot only switch the flow direction of medium, bu-t also connect three pipes with each other, or close any one of three ways and connect the other two pipes. This valve ha-s such advantages as compact structu re, beautiful outline, a-nd good sealing performance, etc 三通球閥介質(zhì)流向示意圖 Sketch of Medium Flow-direction of Three-way BallValve 三通球閥用于分流或匯臺流通，是具有=面或四面閥座的多通口球蠲．任一通口可用作入 口而無泄漏。三通既可制成L型通口也可制成T型通口。 Three-way ball valve is used for diffluence or confHlue.t circulalio. With two-sid. or four-sida valve base embodying multiple channels All the channals can be used as e.t,ance. with no leakage The three-way can be made to L-shaped channel or T-shaped channel 主要性能規(guī)范 Main Specifications 試驗壓力（MPa） Testpressure 公稱壓力PN Nonial pressure（MPa） 1.6 2.5 殼體強度試驗 Shellstrength test 2.4 3.75 密封試驗（液） Seal test 1.76 2.75
| | 主要零件材料Material of Main Parts
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主要連接及外形尺寸Main connection and external dimensions（mm）
| 公稱通徑Nominal diameter | d | D1 | H | L1 | L2 | W | |
| 15 | 1/2″ | 15 | 15 | 65 | 140 | 70 | 130 |
| 20 | 3/4″ | 20 | 20 | 84 | 165 | 83 | 160 |
| 25 | 1″ | 25 | 25 | 84 | 165 | 83 | 160 |
| 40 | 11/2″ | 40 | 40 | 152 | 250 | 125 | 500 |
| 50 | 2″ | 50 | 50 | 157 | 260 | 130 | 500 |
| 65 | 21/2″ | 65 | 65 | 183 | 320 | 160 | 800 |
| 80 | 3″ | 80 | 80 | 183 | 320 | 160 | 800 |
| 100 | 4″ | 100 | 100 | 195 | 370 | 185 | 800 |
| 125 | 5″ | 125 | 125 | 355 | 510 | 255 | 850 |
| 150 | 6″ | 150 | 125 | 355 | 510 | 255 | 850 |
| 200 | 8″ | 200 | 150 | 430 | 580 | 290 | 1500 |
| 250 | 10″ | 250 | 203 | 475 | 670 | 335 |
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| 300 | 12″ | 300 | 254 | 550 | 720 | 360 |
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注：法蘭接口尺寸與Q41F型號相同（尺寸詳見表）
Note：Flange interface size as Model 041F（For dimensions refer to the form on page）
