產品概述
上海自龍閥門制造有限公司生產的止回閥是能自動阻止流體倒流的閥門。止回閥的閥瓣在流體壓力作用下開啟，流體從進口側流向出口側。當進口側壓力低于出口側時，閥瓣在流體壓差、本身重力等因素作用下自動關閉以防止流體倒流。旋啟式止回閥的閥瓣繞轉軸作旋轉運動。其流體阻力一般小于升降式止回閥，它適用于較大口徑的場合。旋啟式止回閥根據閥瓣的數目可分為單瓣旋啟式、雙瓣旋啟式及多瓣旋啟式三種。單瓣旋啟式止回閥一般適用于中等口徑的場合。大口徑管路選用單瓣旋啟式止回閥時，為減少水錘壓力，采用能減小水錘壓力的緩閉止回閥。雙瓣旋啟式止回閥適用于大中口徑管路。對夾雙瓣旋啟式止回閥結構小、重量輕，是一種發展較快的止回閥；多瓣旋啟式止回閥適用于大口徑管道路。
適用范圍
旋啟式止回閥適用于公稱壓力PN1.0MPa~42.0MPa、Class150-2500；公稱通徑DN15~1200mm、NPS1/2~48；工作溫度－196~540℃的各種管路上，用于防止介質倒流。通過選用不同的材質(WCB,CF8(M),CF3(M),1Gr5Mo,15CrMo1V，可適用于水、蒸汽、油品、硝酸、醋酸、強氧化性介質及尿素等多種介質。主要用于石油、化工、制藥、化肥、電力等管路上。
結構
主 要 零 部 件 | 閥體、閥蓋、搖桿 | WCB | CF8 | CF8M | WC6、WC9 |
閥瓣 | WCB堆Cr13或硬質合金 | CF8堆硬質合金 | CF8M堆硬質合金 | WC6、WC9堆硬質合金 | |
閥座 | 25堆Cr13或硬質合金 | 304堆硬質合金 | 316堆硬質合金 | 20Cr1MoV堆硬質合金 | |
墊片 | 軟鐵、XB450 | 聚四氟乙烯 | 聚四氟乙烯 | 不銹鋼+耐酸石棉纏繞墊 | |
螺栓 | 35CrMoA | 35CrMoA | 35CrMoA | 25Cr1Mo1V | |
螺母 | 45 | 45 | 45 | 35CrMoA | |
主要參數 | 適用介質 | 油品、水、蒸汽 | 硝酸類 | 醋酸類 | 油品、水、蒸汽 |
適用溫度 ℃ | ≤425 | ≤200 | ≤200 | ≤550 |
型號 | 公稱 通徑 NPS(in) | 壓力級 Class | 主要結構尺寸(mm) | 閥體 材料 | 性能規范 | |||||
D | D1 | L | L1 | H | 適用溫度(℃) | 適用介質 | ||||
SFH-64C150C | 2" | 150 |
|
| 203 |
| 170 | WCB | ≤425 | 水、油品、蒸氣等 |
" | 3" | " |
|
| 241 |
| 185 | " | " | " |
" | 4" | " |
|
| 292 |
| 215 | " | " | " |
" | 6" | " |
|
| 356 |
| 260 | " | " | " |
" | 8" | " |
|
| 495 |
| 300 | " | " | " |
" | 10" | " |
|
| 622 |
| 350 | " | " | " |
" | 12" | " |
|
| 699 |
| 400 | " | " | " |
" | 14" | " |
|
| 787 |
| 450 | " | " | " |
" | 16" | " |
|
| 864 |
| 480 | " | " | " |
" | 18" | " |
|
| 978 |
| 540 | " | " | " |
" | 20" | " |
|
| 978 |
| 600 | " | " | " |
" | 24" | " |
|
| 1295 |
| 680 | " | " | " |
SFH-64C300C | 2" | 300 |
|
| 267 |
| 170 | WCB | ≤425 | 水、油品、蒸氣等 |
" | 3" | " |
|
| 318 |
| 215 | " | " | " |
" | 4" | " |
|
| 356 |
| 235 | " | " | " |
" | 6" | " |
|
| 445 |
| 300 | " | " | " |
" | 8" | " |
|
| 533 |
| 340 | " | " | " |
" | 10" | " |
|
| 622 |
| 350 | " | " | " |
" | 12" | " |
|
| 711 |
| 420 | " | " | " |
" | 14" | " |
|
| 838 |
| 480 | " | " | " |
" | 16" | " |
|
| 864 |
| 520 | " | " | " |
" | 18" | " |
|
| 978 |
| 600 | " | " | " |
" | 20" | " |
|
| 1016 |
| 670 | " | " | " |
" | 24" | " |
|
| 1346 |
| 750 | " | " | " |
SFH-64C600C | 2" | 600 |
|
| 292 |
| 175 | WCB | ≤425 | 水、油品、蒸氣 |
" | 3" | " |
|
| 356 |
| 230 | " | " | " |
" | 4" | " |
|
| 432 |
| 295 | " | " | " |
" | 6" | " |
|
| 559 |
| 360 | " | " | " |
" | 8" | " |
|
| 660 |
| 400 | " | " | " |
" | 10" | " |
|
| 787 |
| 460 | " | " | " |
" | 12" | " |
|
| 838 |
| 520 | " | " | " |
" | 14" | " |
|
| 889 |
| 560 | " | " | " |
" | 16" | " |
|
| 991 |
| 650 | " | " | " |
" | 18" | " |
|
| 1092 |
| 730 | " | " | " |
" | 20" | " |
|
| 1194 |
| 800 | " | " | " |
" | 24" | " |
|
| 1397 |
| 900 | " | " | " |
產品圖片、參數僅供參考，實際參數以上海自龍閥門制造有限公司產品為準，：
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