NKJ61H真空截止閥主要結構特點及用途:
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、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、結構簡單、緊湊、檢修方便,使用壽命長。
4、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、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。
閥門結構型式 Valve ctrucure type
NKJ61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 |
鋁青銅 |
膨脹復合石墨 | 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 |
NKJ61H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 | |||||||
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 |
注:PN4.0(40)閥門允許作為PN1.0(10)、PN1.6(16)、PN2.5(25)壓力級選用
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