液環真空泵

兩級，AT

氣量400至2,800 ACFM（680至4,750 m3/h）

流行的NASH AT兩級真空泵系列已為電力行業提供可行的高真空性能*過25年之久。氣量范圍從400至2,800 ACFM（680至4,750 m3/hr），當您需要堅固耐用的機器來處理飽和的工藝氣體時，AT的四種真空泵型號是您理想的選擇。

描述

專為在惡劣條件下操作而設計

AT真空泵系列是我們專為冷凝器排氣工作設計的一代雙級泵。AT真空泵包括一個完整的雙級轉子，設計為將真空度降至0.8 in HgA（27 mbar abs)。*對壓力比單級泵約低40％。

AT液環真空泵為化學、石化和電力行業而設計。其完整的雙級轉子，AT泵，能夠冷凝工藝產生的蒸汽并回收或處理它們。

錐形端口和轉子配置

Nash的可變錐形端口設計于1932年獲得自主研發設計，使壓縮力抵消轉子和軸的重量，從而盡量減少軸承的運行負荷。可變端口在整個工作范圍內優化泵的性能。憑借不斷創新，Nash的自主研發設計設計具有以下特點：

?可選擇的凸輪清洗方法，以盡量減小涉及固體的工作中侵蝕造成的損害

?大壓差能力

?GSV設計可更大限度地減少氣體從排放口漏到入口，從而提高容量，特別是在深度真空時

?液體殘留物耐受性高

?側面排放，以盡量減少滿液啟動的可能

?自吸設計可消除在再循環系統中使用增壓泵

可行、快效、性能優佳

AT通過經過證明、可行的NASH錐形液環泵設計提供優佳的性能和可行性。一臺AT3006真空泵在佶締納士的一家工廠制造和測試，結果表明，在高真空范圍內無需增加用電量，干燥空氣容量即可增加25％。AT3006的運行效率*過AT3004，而且就當前能源成本而言，效率對我們的客戶來說是一個重要因素。

無論您現有的AT泵是否需要保養、維修，或以新的或翻新再造的AT泵更換，佶締納士都能滿足您的需求。

技術數據

?吸入流量：400至2,800 ACFM（680至4,750 m3/h）

?真空范圍：至0.8 inHgA（至28 mbar abs.）

?軸密封：填料函（標準）

?結構材料：鑄鐵

Liquid Ring Vacuum Pump

Two Stage, AT

Capacity 400 to 2,800 ACFM (680 to 4,750 m3/h)

The popular NASH AT two stage vacuum pump series has been providing reliable high vacuum performance in the power industry for over 25 years. With capacity ranging from 400 to 2,800 ACFM (680 to 4,750) the AT's four vacuum pump models are an ideal choice when you need a rugged and long-lasting machine to handle your saturated process gases.

Description

Designed to Operate in Harsh Conditions

The line of AT vacuum pumps is our first generation of two stage pumps designed specifically for the condenser exhaust duty. Including an integral two stage rotor, the AT vacuum pump is designed to reach vacuum levels down to 0.8 inHgA (30 mbar abs). This is approximately 40% lower absolute pressure than a single stage pump.

AT liquid ring vacuum pumps were created for the chemical, petrochemical, and power industries. With their integral two stage rotors, AT pumps, are able to condense vapors that come off the process and to recover or dispose of them.

Conical Porting and Rotor Configuration

Patented in 1932, Nash’s variable conical porting design allows the force of compression to counter the weight of the rotor and shaft to help minimize load on bearings during operation. The variable porting optimizes pump performance across the entire operating range. With constant innovation, Nash’s patented design features:

Option for lobe purge to minimize damage from erosion in duties with solids present

Large differential pressure capability

Gas scavenging feature minimizes slip of gas from discharge to inlet improving capacity, especially at deep vacuum

High liquid carryover tolerance

Side discharge to minimize chance of flooded start

Self-priming design may allow elimination of booster pump in recirculated systems

Reliable and Efficient with Proven Performance

The AT offers superior performance and reliability through the proven reliable NASH conical liquid ring pump design.

The first AT3006 vacuum pump was built and tested at a Gardner Denver Nash facility with results showing an increased dry air capacity up to 25% in the high vacuum range without an increase in power usage. The AT3006 offers higher operating efficiency than the AT3004, and with today's energy costs, efficiency is an important factor for our customers.

Whether you have an existing AT pump that is in need of service, repair or replacement with a new or remanufactured duplicate AT pump, Gardner Denver Nash is there to meet your needs.

Technical Data

AT Two-Stage Capacity Chart

Suction Capacity: 400 to 2,800 ACFM (680 to 4,750 m3/h)

Vacuum Range: to 0.8 inHgA (to 30 mbar abs.)

Shaft Seals: Stuffing box (standard)

Materials of Construction: Cast Iron