液环真空泵两级AT

液环真空泵

两级，AT

气量400至2,800 ACFM（680至4,750 m3/h）

流行的NASH AT两级真空泵系列已为电力行业提供可行的高真空性能*过25年之久。气量范围从400至2,800 ACFM（680至4,750 m³/hr），当您需要坚固耐用的机器来处理饱和的工艺气体时，AT的四种真空泵型号是您理想的选择。

描述

专为在恶劣条件下操作而设计

AT真空泵系列是我们专为冷凝器排气工作设计的一代双级泵。AT真空泵包括一个完整的双级转子，设计为将真空度降至0.8 in HgA（27 mbar abs)。*对压力比单级泵约低40％。

AT液环真空泵为化学、石化和电力行业而设计。其完整的双级转子，AT泵，能够冷凝工艺产生的蒸汽并回收或处理它们。

锥形端口和转子配置

Nash的可变锥形端口设计于1932年获得自主研发设计，使压缩力抵消转子和轴的重量，从而尽量减少轴承的运行负荷。可变端口在整个工作范围内优化泵的性能。凭借不断创新，Nash的自主研发设计设计具有以下特点：

可选择的凸轮清洗方法，以尽量减小涉及固体的工作中侵蚀造成的损害

大压差能力

GSV设计可更大限度地减少气体从排放口漏到入口，从而提高容量，特别是在深度真空时

液体残留物耐受性高

侧面排放，以尽量减少满液启动的可能

自吸设计可消除在再循环系统中使用增压泵

可行、快效、性能优佳

AT通过经过证明、可行的NASH锥形液环泵设计提供优佳的性能和可行性。一台AT3006真空泵在佶缔纳士的一家工厂制造和测试，结果表明，在高真空范围内无需增加用电量，干燥空气容量即可增加25％。AT3006的运行效率*过AT3004，而且就当前能源成本而言，效率对我们的客户来说是一个重要因素。

无论您现有的AT泵是否需要保养、维修，或以新的或翻新再造的AT泵更换，佶缔纳士都能满足您的需求。

技术数据

吸入流量：400至2,800 ACFM（680至4,750 m3/h）

真空范围：至0.8 inHgA（至28 mbar abs.）

轴密封：填料函（标准）

结构材料：铸铁

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