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固定球閥的用途,標(biāo)準(zhǔn)規(guī)范和結(jié)構(gòu)特點

更新時間:2008-05-09

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固定球閥的用途,標(biāo)準(zhǔn)規(guī)范和結(jié)構(gòu)特點

固定球閥的用途,標(biāo)準(zhǔn)規(guī)范和結(jié)構(gòu)特點

固定球閥的用途和使用范圍
        固定球閥適用于Class150~Class1500、PN16~PN100、JIS 10K~JIS 20K的各種管路上,用于截斷或接通管路中的介質(zhì),選用不同的材質(zhì),可分別適用于水、蒸汽、油品、液化氣、天然氣、煤氣、硝酸、醋酸、氧化性介質(zhì)、尿素等多種介質(zhì),廣泛應(yīng)用于化工、石油、天然氣、冶金等行業(yè)。固定球閥的驅(qū)動方式為蝸輪蝸桿傳動、手動、氣動或電動。固定式球閥一般采用法蘭連接,也可采用對焊連接。

固定球閥的制造標(biāo)準(zhǔn)

標(biāo)準(zhǔn)項目
API美標(biāo)系列
GB國標(biāo)系列
設(shè)計規(guī)范
API 6D、API 608
GB/T 12237
壓力溫度等級
ASME B16.34
GB/T 9131
結(jié)構(gòu)長度
ASME B16.10
GB/T 12221
法蘭型式與尺寸
ASME B16.47、API 605
GB/T9113、JB/T79
對焊接端
ASME B16.25
GB/T 12224
檢驗與試驗
API 6D
JB/T 9092

固定球閥主要性能規(guī)范
試驗壓力
(MPa)
公稱壓力MPa
壓力級Class
JISMPa
1.6
2.5
4.0
6.4
10.0
150
300
400
600
900
10K
20K
強度試驗
2.4
3.8
6.0
9.6
15.0
3.1
7.8
10.2
15.3
23.1
3.1
7.8
密封試驗
1.8
2.8
4.0
7.0
11.0
2.1
5.6
7.5
11.2
16.8
2.1
5.6
氣密試驗
0.5~0.7
工作溫度
PTFE≤150℃ PPL≤300℃ 碳纖≤350℃
適用介質(zhì)
C:水、油、蒸汽 P:硝酸類(溫度≤200℃ ) R:醋酸類(溫度≤200℃ )

固定球閥結(jié)構(gòu)特點

  雙阻塞與排放功能                防火安全結(jié)構(gòu)             密封緊急注脂救護            可靠的閥桿密封

雙阻塞與排放功能
    固定球閥采用彈簧預(yù)緊浮動閥座,無論閥門處于全開或全關(guān)狀態(tài)時,上下游側(cè)的閥座使流體阻斷,閥體中腔滯留物通過排放閥排泄。

自動泄壓功能
    閥門體腔停留介質(zhì)溫度升高而引起異常升壓時,不需通過安全閥,而僅靠閥座功能就可自動泄壓,這對保證閥門在輸送液體介質(zhì)時的安全性非常重要。

防火安全結(jié)構(gòu)
    閥門都具備防火安全功能,其設(shè)計、制造均遵循API 607和API 6FA 規(guī)范要求。

密封緊急注脂救護
    由于介質(zhì)中的異物或火災(zāi)造成閥座密封意外失效,注脂閥提供了與注脂槍的快速連接,方便快捷地將密封脂注入到閥座密封部位,緩解泄漏。

可靠的閥桿密封和低操作力矩
    除了設(shè)置標(biāo)準(zhǔn)密封套圈外,填料壓蓋上也設(shè)置了“O"型密封圈,雙重密封保證了閥桿密封的可靠性;增設(shè)的石墨填料和密封脂注入使火災(zāi)后的閥桿泄漏降至zui低。閥桿滑動軸承和止推軸承使閥門操作輕便。

全通徑或縮徑
可根據(jù)需要選用全通徑或縮徑結(jié)構(gòu)。全通徑閥門流量孔徑與管線內(nèi)徑一致,便于管線清掃。

閥桿可加長
根據(jù)安裝或操作的需要,可對閥門閥桿進行加長。加長桿球閥,特別適用于城市煤氣等需要埋地鋪設(shè)管線的場合。加長閥桿尺寸按客戶需要確定。

操作靈活
采用具有小摩擦系數(shù)和良好自潤滑性的閥座和閥桿軸承,大大地減少了閥門的操作扭矩。因此即使在沒有提供密封潤滑脂的情形下,也能夠靈活自如地對閥門進行操作。

驅(qū)動方式多,易實現(xiàn)自動化控制
驅(qū)動方式靈活,操作方式根據(jù)需要可選擇手動、氣動、電動、氣液聯(lián)動、液動等

浙公網(wǎng)安備 33032402001565號

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