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Posi-flate流量控制閥又稱(chēng)400X流量控制閥,，是一種采用高精度先導(dǎo)方式控制流量的多功能閥門(mén),。適用于配水管需控制流量和壓力的管路中,，保持預(yù)定流量不變,，將過(guò)大流量限制在一個(gè)預(yù)定值,，并將上游高壓適當(dāng)減低,，即使主閥上游的壓力發(fā)生變化，也不會(huì)影響主閥下游的流量,。其連接方式分為法蘭式與螺紋式,；焊接式?？刂普{(diào)節(jié)方式分為自動(dòng)與手動(dòng),。
Posi-flate流量控制閥又稱(chēng)400X流量控制閥,是一種采用高精度先導(dǎo)
1、一改常規(guī)節(jié)流閥使用孔板或純機(jī)械的減小流域面積的原理,，利用相關(guān)導(dǎo)閥,，zui大限度地減小能量在節(jié)流過(guò)程中的損失
2、控制靈敏度高,，安全可靠,，調(diào)試簡(jiǎn)便，使用壽命長(zhǎng),。
流量控制閥可在沒(méi)有外接電源的情況下,，自動(dòng)實(shí)現(xiàn)系統(tǒng)的流量平衡。是通過(guò)保持孔板（固定孔徑）前后壓差一定而實(shí)現(xiàn)流量限定的,，因此,，也可稱(chēng)定流量閥,。
定流量閥作用對(duì)象是流量，能夠鎖定流經(jīng)閥門(mén)的水量,，而不是針對(duì)阻力的平衡,。他能夠解決系統(tǒng)的動(dòng)態(tài)失調(diào)問(wèn)題：為了保持單臺(tái)制冷機(jī),、鍋爐,、冷卻塔、換熱器這些設(shè)備的率運(yùn)行,，就需要控制這些設(shè)備流量固定于額定值,；從系統(tǒng)末端來(lái)看，為了避免動(dòng)態(tài)調(diào)節(jié)的相互影響,，也需要在末端裝置或分支處限制流量,。
在設(shè)計(jì)中應(yīng)注意的問(wèn)題，流量控制閥的缺點(diǎn)是在于閥門(mén)有zui小工作差的要求,，一般產(chǎn)品要求zui小工作壓差20KPa,，如果安裝在zui不利回路上，勢(shì)必要求循環(huán)水泵多增加2米水柱的工作揚(yáng)程,，所以應(yīng)采取近端安裝,，遠(yuǎn)端不安的方法。用戶離熱源距離大于供熱半徑的80%時(shí)就不要安裝這種流量控制閥,。

Magna™? Flow Control Valve
Series 608 & 700
For Gases or Liquids

1100 Precise Setpoints

The Magna Flow Control Valve with an easy to read micrometer dial offers an amazing 1100 precise set points to accuray control flow of gases or liquids. The extremely high CV of the Magna Flow Control Valve enables very high flows with the Series 608 and lower flows with the Series 700 for whatever media is being controlled, up to 200 PSIG pressure or full vacuum. Linear flow characteristics provide easy to set and precise metering of gases and liquids for almost any application where accurate results are required.

Hundreds of Applications

Available in light-weight impact resistant nylon, the Magna Flow Control Valve offers superior strength and corrosion resistance, making it ideal for use in hundreds of different applications. Simplicity of construction, with removable top and bottom caps, provides easy disassembly for cleaning or maintenance without removing the valve from service. Proven O-ring seals provide a positive zero leak shut-off. Replacement of seals, if required, is quick and easy because disassembly is simple and fast. The Magna Flow Control Valve offers all these features at a very affordable price.

 Features