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LV621-N_LV622-N_LV623-N_LV624-N液位控制開關(guān)OMEGA

LV600系列獨(dú)特的浮球液位開關(guān)僅需***個(gè)液位開關(guān)就可提供***種經(jīng)濟(jì)的泵升/泵降液位控制方法。通過(guò)調(diào)整允許LV600浮動(dòng)的電纜長(zhǎng)度來(lái)設(shè)置開/關(guān)差分。取決于LV600是隨電纜向上還是向下浮動(dòng)（參見(jiàn)圖紙），15安培繼電器是打開還是關(guān)閉。當(dāng)LV600高于或低于固定點(diǎn)80%的電纜長(zhǎng)度時(shí)，繼電器改變狀態(tài)。例如，如果電纜固定在10英尺（3米）的自由電纜上，則LV600將在固定點(diǎn)上方和下方8英尺（2.5米）處觸發(fā)。因此，湍流通常不會(huì)導(dǎo)致錯(cuò)誤的切換。電纜可以固定在管道上，也可以通過(guò)在電纜上滑動(dòng)來(lái)使用附件配重（參見(jiàn)圖紙）。機(jī)械式單刀雙擲開關(guān)沒(méi)有潛在的危險(xiǎn)水銀，在250伏交流電壓下額定電流為15A，開關(guān)次數(shù)可以超過(guò)100000次。內(nèi)部微動(dòng)開關(guān)繼電器具有UL和CSA認(rèn)證。外殼和電纜通過(guò)兩步塑料注射成型工藝進(jìn)行密封，以確保密封不泄漏。

LV621-N_LV622-N_LV623-N_LV624-N液位控制開關(guān)OMEGA

SPECIFICATIONS 

Minimum Fluid Specific Gravity: 0.62 for LV610; 0.72 for LV620

Min/Max Level Differential: Approximately 152 mm (6") to many feet, depending on cable length 

Operating Temperatures: PVC Cable; Switch Rating: SPDT, 15 A @ 250 Vac-25 to 50°C (-13 to 122°F); Neoprene Cable; -25 to 50°C (-13 to 122°F)

Operating Pressure: 75 psig at 70°F./21°C Pressure rating decreases with increasing temperature

Wetted Surfaces: Polypropylene body and PVC or Neoprene cable

Counterweight Dimensions: 2" Diameter x 2.25" High

LV621-N_LV622-N_LV623-N_LV624-N液位控制開關(guān)OMEGA

Use One Switch for Differential or Hi/Lo Control

Adjustable Level Differential from 6" to Over 100'

Case and Cable Hermetically Sealed by Plastic Injection Molding

Circular and Rectangular Designs

The LV600 Series unique float level switches provide an economical means of pump-up/pump-down level control with just one level switch. The ON/OFF differential is set by adjusting the length of cable over which the LV600 is allowed to float. Depending on whether the LV600 is floating with the cable UP or DOWN (see drawing), the 15 amp relay is on or off. The relay changes state when the LV600 is above or below the fixed point by 80% of the cable length. For example, if the cable is fixed for 10' (3 m) of free cable, the LV600 will trigger at 8' (2.5 m) above and below the fixed point. Thus, turbulence will generally not cause false switching. The cable can be fixed to a pipe, or the accessory counterweight can be used by slipping it over the cable (see drawing). The mechanical SPDT switch has no potentially dangerous mercury, is rated for 15A at 250 Vac, and can switch more than 100,000 times. The internal microswitch relay carries UL and CSA approvals. The case and cable are hermetically sealed by a two-step plastic injection molding process to ensure a leak-tight seal.