BD-8000系列氣動(dòng)調(diào)節(jié)閥BD-8000 series pneumatic control valve
BD-8000系列氣動(dòng)薄膜直通單座調(diào)節(jié)閥采用頂導(dǎo)向結(jié)構(gòu)，配用多彈簧執(zhí)行機(jī)構(gòu)。具有結(jié)構(gòu)緊湊、重量輕、動(dòng)作靈敏、流體通道呈3流線型、壓降 損失小、閥容量大、流量特性精確、拆裝方便等優(yōu)點(diǎn)。廣泛應(yīng)用于精確 控制氣體、液體等介質(zhì)，工藝參數(shù)如壓力、流量、溫度、液位保持在給 定值。特別適用于允許泄漏星小閥前后壓差不大的工作場(chǎng)合。
本系列產(chǎn)品有標(biāo)準(zhǔn)型、調(diào)節(jié)切斷閥、波紋管密封型、夾套保溫型、防腐襯氟型等 多種品種。產(chǎn)品公稱壓力等級(jí)有PN10、16、40、64；閥體口徑范圍DN20~300。適用流體溫度由-196℃~+560℃范圍內(nèi)多種檔次。泄漏標(biāo)準(zhǔn)有IV級(jí)或VI級(jí)。流量特性為線性或等百分比。多種多樣的品種規(guī)格可供選擇。
BD-8000氣動(dòng)單座調(diào)節(jié)閥的特點(diǎn)
1.頂導(dǎo)向單座調(diào)節(jié)閥，結(jié)構(gòu)緊湊，部件少、易維修。
2.金屬閥芯適合多種工作場(chǎng)合，達(dá)IV級(jí)泄漏標(biāo)準(zhǔn)，軟密封結(jié)構(gòu)閥芯達(dá)VI級(jí)泄漏標(biāo)準(zhǔn)。
3.閥體按流體力學(xué)原理設(shè)計(jì)成等截面低阻流道，額定流量系數(shù)增大30%?？烧{(diào)范圍大，固有可調(diào)比為50:1。執(zhí)行機(jī)構(gòu)采用多彈 簧結(jié)構(gòu)，高度減少30%，重量減輕30%。
4.BD-8000系列波紋管密封調(diào)節(jié)閥，對(duì)移動(dòng)的閥桿形成完全的密封，堵絕流體外漏。BD-8000系列氣動(dòng)薄膜調(diào)節(jié)閥帶有保溫夾套，用于流體冷卻后易結(jié)晶、凝固造成堵塞的場(chǎng)合。
5.BD-8000系列波紋管密封防腐襯氟調(diào)節(jié)閥，由于波紋管元件本身變形性和卓著的抗老化性，完全克服了填料密封閥通常存在的填料老化和溫差敏感等弱點(diǎn)。其次，采用波紋管和填料雙重密封結(jié)構(gòu)，安全可靠性更好。因此在劇毒，強(qiáng)腐蝕性，放射性等稀有特殊介質(zhì)的自動(dòng)控制系統(tǒng)中得到廣泛應(yīng)用。
6.BD-8000系列氣動(dòng)三通調(diào)節(jié)閥,氣動(dòng)三通調(diào)節(jié)閥三通閥，采用雙閥芯上下導(dǎo)向結(jié)構(gòu)，通常使用在熱交換器上，根據(jù)用途可分為分流調(diào)節(jié)型(一進(jìn)二出)、合流調(diào)節(jié)型（二進(jìn)一出）、快速切斷型。
The BD-8000 series pneumatic diaphragm straight-through single-seat regulating valve adopts a top-guided structure and is equipped with a multi-spring actuator. It has the advantages of compact structure, light weight, sensitive operation, a 3-streamline flow channel, low pressure loss, large valve capacity, precise flow characteristics, and convenient disassembly and assembly. It is widely used for precisely controlling gases, liquids, etc., maintaining process parameters such as pressure, flow, temperature, and liquid level at given values. It is particularly suitable for working conditions where leakage is allowed to be small and the pressure difference before and after the valve is not large.
This series includes standard type, regulating and cutting valve, bellows-sealed type, jacketed insulation type, and fluorine-coated anti-corrosion type, among others. The nominal pressure grades of the products are PN10, 16, 40, 64; the valve body diameter range is DN20 to 300. The applicable fluid temperature ranges from -196℃ to +560℃. The leakage standard is IV or VI. The flow characteristics are linear or equal percentage. There are various varieties and specifications for selection.
Features of the BD-8000 pneumatic single-seat regulating valve:
1. Top-guided single-seat regulating valve, compact structure, few components, easy maintenance.
2. Metal valve core suitable for various working conditions, reaching IV-level leakage standard, soft-sealed structure valve core reaching VI-level leakage standard.
3. The valve body is designed according to the principles of fluid mechanics as an equal-section low-resistance flow channel, with a 30% increase in rated flow coefficient. Large adjustable range, inherent adjustable ratio of 50:1. The actuator adopts a multi-spring structure, reducing the height by 30% and the weight by 30%.
4. The BD-8000 series bellows-sealed regulating valve for pneumatic control, forms a complete seal against the moving valve stem, completely preventing fluid leakage. The BD-8000 series pneumatic diaphragm regulating valve with an insulation jacket is used in situations where fluid cooling causes crystallization or solidification and leads to blockage.
5. The BD-8000 series bellows-sealed and fluorine-coated anti-corrosion regulating valve, due to the deformation and outstanding aging resistance of the bellows element, completely overcomes the weaknesses of the typical packing seal valve such as aging of packing and sensitivity to temperature differences. Additionally, it adopts a dual-sealing structure of bellows and packing, providing better safety and reliability. Therefore, it is widely used in automatic control systems for rare special media such as highly toxic, strongly corrosive, and radioactive substances.
6. The BD-8000 series pneumatic three-way regulating valve, the pneumatic three-way regulating valve, adopts a double-valve core top-guided structure, usually used on heat exchangers, and can be divided into分流 regulating type (one inlet and two outlets)， converging regulating type (two inlets and one outlet)， and rapid cutting type according to the purpose.
