1、真空截止閥主體采用鑄鍛結構，具有平行雙密封副半強制雙向密封，密封到位運動和楔形塊楔緊運動分步作用實現零泄漏。
2、真空截止閥密封面運動磨擦力小、啟閉輕便，而且密封面磨損有自動補償功能。
3、真空截止閥結構簡單、緊湊、檢修方便，使用壽命長。
4、真空截止閥閥蓋填料室設有真空密封結構，具有自脹壓緊作用，并且密封采用高強膨脹材料密封，使系統與大氣*隔離，具有很好的系統氣密性。
5、真空截止閥連接形式分法蘭、焊接兩種，驅動方式有手動、電動兩種。
該閥門適用于工作溫度≤425℃和≤550℃，工作介質為水、蒸汽或空氣的管路上，作為啟閉裝置；尤其適用于火電廠汽機冷凝和真空負壓系統，起真空隔離密封作用。 真空截止閥閥門結構型式 Valve ctrucure type NKJ61真空截止閥主要性能規范 產品類型
Product type | 殼體強度試驗/MPa
Sheli strangth test | 上密封試驗/MPa
Back seal test | 密封試驗/MPa
Seal test | 適用介質
Applicable
medium | 適用溫度/℃
Applicable
temperature | | NKJ61H-40 | 6.O | 4.4 | 4.4 | 水、蒸汽、空氣
Water、Steam、Air | ≤425 | | NKJ61H-64 | 96 | 7.O | 7.O | | NKJ61H-100 | 15.O | 11.0 | 11.O | | NKJ61Y-40l | 6.O | 4.4 | 4.4 | 水、蒸汽、空氣
Water、Steam、Air | ≤550 | | NKJ61Y-64l | 9.6 | 7.0 | 7.O | | NKJ61Y-1OOI | 15.O | 11.O | 11.O |
NKJ61H真空截止閥主要零件材料 Material for Main Parts 零件名稱
Part name | 閥體、閥蓋 Body Bonnet | 閥桿
Valve Stem | 閥瓣 Disc | 密封面
Sealing face | 閥桿螺母
Yokenut | 填料
Packing | 緊固件
Fasteher | | NKJ61H-C型 | 25或WCB | 鉻不銹鋼
Crstain
mless
teel | 鉻不銹鋼
Crstain
mless
steel | H：合金鋼
H：alloy steel | 鋁青銅
AI
bronze | 膨脹復合石墨
Expanding
compound
graphlte | 優質碳鋼
High-grade
carbon
steel | | NKJ61Y-l型 | 鉻鉬鋼
Cr.Mo steel | 20CrlM01vA 或38CrMoAlA | 12CrlMo 1VA | Y：硬質合金
Y:oarbide alloy | 鉻鉬鋼
Cr.Mo steel |
NKJ61H真空截止閥主要尺寸及重量 Main dimensions and weight 公稱通徑
DN/mm
Nominal
diameter | 公稱壓力
PN/MPa
Nominal
pressure | 主要外形尺寸和連接尺寸/mm
Main extemal and connectingd mensions | | L | H | D | D0 | D1 | L1 | α | W | | 1O | 4.0 | 130 | 245 | 36 | 11 | 18.4 | 1O | - | 120 | | 15 | 130 | 245 | 36 | 16 | 22.5 | 1O | - | 120 | | 20 | 150 | 265 | 44 | 21 | 28.5 | 11 | - | 160 | | 25 | 160 | 270 | 48 | 26 | 34.5 | 12 | - | 200 | | 32 | 180 | 285 | 48 | 34 | - | - | 37o30' | 200 | | 40 | 200 | 320 | 55 | 40 | - | - | 37o30' | 240 | | 50 | 230 | 365 | 64 | 48 | - | - | 37o30' | 320 | | 65 | 290 | 41O | 82 | 66 | - | - | 37o30' | 300 | | 80 | 31O | 430 | 95 | 78 | - | - | 37o30' | 300 | | 100 | 350 | 470 | 117 | 1OO | - | - | 37o30' | 350 | | 125 | 400 | 500 | 143 | 126 | - | - | 37o30' | 350 | | 150 | 480 | 533 | 167 | 150 | - | - | 37o30' | 400 | | 1O | 6.4 | 130 | 245 | 36 | 1O | 18.4 | 1O | - | 120 | | 15 | 130 | 245 | 36 | 15 | 22.5 | 1O | - | 120 | | 20 | 150 | 265 | 44 | 20 | 28.5 | 11 | - | 160 | | 25 | 160 | 270 | 48 | 25 | 34.5 | 12 | - | 200 | | 32 | 180 | 280 | 48 | 33 | - | - | 37o30' | 200 | | 40 | 200 | 320 | 55 | 39 | - | - | 37o30' | 240 | | 50 | 230 | 365 | 64 | 48 | - | - | 37o30' | 320 | | 65 | 290 | 41O | 82 | 65 | - | - | 37o30' | 320 | | 80 | 31O | 430 | 95 | 76 | - | - | 37o30' | 360 | | 100 | 350 | 470 | 117 | 98 | - | - | 37o30' | 400 | | 125 | 480 | 500 | 143 | 123 | - | - | 37o30' | 400 | | 150 | 480 | 533 | 167 | 148 | - | - | 37o30' | 500 | | 1O | 10.O | 130 | 245 | 36 | 1O | 18.4 | 1O | - | 120 | | 15 | 130 | 245 | 36 | 14 | 22.5 | 1O | - | 120 | | 20 | 150 | 265 | 44 | 20 | 28.5 | 11 | - | 160 | | 25 | 160 | 270 | 48 | 25 | 34.5 | 12 | - | 200 | | 32 | 180 | 285 | 48 | 32 | - | - | 37o30' | 200 | | 40 | 200 | 320 | 55 | 38 | - | - | 37o30' | 240 | | 50 | 230 | 355 | 64 | 48 | - | - | 37o30' | 320 | | 65 | 290 | 41O | 82 | 63 | - | - | 37o30' | 320 | | 80 | 31O | 430 | 95 | 74 | - | - | 37o30' | 360 | | 1OO | 350 | 470 | 117 | 97 | - | - | 37o30' | 400 | | 125 | 400 | 500 | 143 | 123 | - | - | 37o30' | 400 | | 150 | 480 | 533 | 167 | 148 | - | - | 37o30' | 500 |
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