空气运动隔膜泵如何工作？
顾名思义，air operated double diaphragm pumps（AODD）使用压缩空气来操作，而不是电动机。这种独特的操作特性允许它们用于不可取的电动泵的情况（e.g., when pumping flammable liquids). By their very nature, though, these types of pumps must be installed and maintained properly to function as designed.
AODD pumps use a flexible diaphragm mounted on either side of the pump’s central chamber to pump fluids into and out of the pump’s body.
When these diaphragms are pushed away from (or toward) the center section, or air motor, a vacuum is created in the pump’s body, and fluid flows into one of the liquid chambers through an inlet port. When the diaphragms are subsequently pushed in the opposite direction back to their original positions, again via compressed air, the fluid is expelled from the liquid chamber via an outlet port.
当泵运行时，此循环在且泵运行时重复，创建泵送动作。专门设计检查阀门控制泵的中心室中的流体流出，作为泵循环，确保流体仅在一个方向上流动。
在图1中the compressed air has forced the left diaphragm towards the product chamber and displaced the liquid from that chamber through the open valve at the top to the discharge port. Liquid is simultaneously drawn in by the right diaphragm, thus refilling the second liquid chamber. When the end of the stroke is reached, it reverses automatically, and the cycle is repeated in the opposite direction.
In the Fig. 2liquid is drawn in by the left-hand diaphragm and displaced by the right-hand diaphragm. The liquid is displaced, and thus conveyed, by the compressed air.
什么是空气操作的双膜片泵用于？
AODD pumps have good suction lift characteristics, areself-priming在大多数液体中，可以搅拌干燥。These泵可以轻松地处理低至中等粘度流体（包括含有大悬浮固体），并且可用于泵送腐蚀性和易燃液体。在加工行业中有一种说法，如果可以将材料倒入AODD泵，则这些类型的泵通常可以泵送它。
Due to their simple design, AODD pumps are relatively inexpensive to both purchase and operate， 和coupled with their efficiency and accuracy, stainless steel versions are well suited for certain food grade sanitary processing applications, including filling, dispensing, and计量液体以及除水分。
食品和饮料加工和生物制药制造业的常见用途包括：
- 添加剂注射
- 采样
- Dosing
- 涂层
- 原料卸货
- 填充
- 剪切敏感过程
- 过滤压力机
- Aseptic transfer of proteins and cells
- Producing the required flow and pressure forspraying and cleaning tasks。
好处of Air Operated Double Diaphragm Pumps
- Unlike most other pump designs,AODD pumps can run dry for extended periods of time without damage。
- Due to their air-powered design, AODD pumps are适用于危险情况（例如，在存在易燃材料的环境中）作为这些类型的泵的工作机制，不会产生火花。
- 泵的设计将工艺流体与潜在敏感的泵部件分开。泵内部的隔离可在维修之间提供增加的时间。
- AODD泵隔膜有许多材料，以覆盖各种温度和化学兼容性应用。
- They are manufactured from a wide variety of metal and non-metal materials
- 许多AODD泵都设计用于卫生和食品级加工。
As with any pump, if the application isn’t right it can be disadvantageous, we suggest you contact an申请专家to ensure you use the right pump for your unique application.
How to install and troubleshoot AODD pumps
AODD泵在安装时具有稍微专门的要求。
- 由于这些类型的泵作为隔膜循环引起的振动，AODD pumps must be mounted on a rigid base plate.未能这样做最终会导致泵的脚磨损由于摩擦，导致昂贵的维修。
- 流体入口吸管或软管的直径绝不能比吸入口的尺寸更小。这可能导致泵饥饿，降低有效的操作。例如，1“吸入口，需要将1”吸入软管送入其中。而且，该抽吸管或软管应尽可能短，并且优选地尽可能靠近供应容器，只要总系统头部不超过泵占空比即可。
- 这些类型的泵的空气供应管线必须适当尺寸。Using too small of an air line leading into the pump will starve it of the “fuel” (i.e., compressed air) required for its operation. If you must supply the pump with a smaller air line, try to supply the pump with an air line no more than one pipe size less than the air supply port. Example; a pump that has a 3/4 inch air supply port should have an air supply line no smaller than 1/2 inch.
- 控制AODD泵的性能（流量和压力），在泵的空气供应管线中安装空气压力调节器组件，以控制进入的空气压力。使用空气调节器安装正确的空气管线尺寸将解决大多数AODD泵安装问题。
If an AODD pump fails to operate, check for the following:
- 确保空气入口尺寸不太小。如上所述，空气供应管线入口管应与泵的进气口相同。此外，确认进入的空气压力是所需的PSI以操作泵。
- 检查泵的消声器进行结冰。如本文早些时候所述，AODD泵在操作时大声响亮，并且由于结果通常安装消声器。由于空气压缩，这些消声器可以在低于冻结的温度和潮湿环境下运行在消声器中可能发生糖粉，限制泵的操作。
- 为避免消声器结冰的问题，请执行以下操作：
- 减少到泵的气压。
- 增加泵尺寸，使其以较低的速度（即，在较低的气压下）操作。
- 通过排气口管将消声器排出到偏远位置。
- 用水捕手和排水管加空气管线过滤器。
- 在空气供应管线安装加热器到泵。
- 定期检查泵的表面是否泄漏。安装在泵上的任何PTFE O形圈应始终在维修时更换，因为它们可能易于在重用时泄漏。
- Pump priming on initial start-up may also be a source of problems with AODD pumps.当使用第一次使用泵时，最初使用空气调节器减慢泵的速度。当泵速减小并且流体有足够的时间进入泵的身体时，增加气压以在正常速度下操作泵。
- 检查泵的入口和出口线条是否有任何限制，包括关闭或部分关闭阀门和堵塞或扭曲的线条。
Saniflo™卫生系列
Wilden Saniflo Hygienic Series pumps能够有效地泵送食品加工和生物制药制造中的各种液体，包括酱汁和泥浆，药品和高纯度溶液以及磨料培养基和固体。它们包含一个可自由排水的流路径，提高性能并实现CIP能力。
These pumps are offered with钝化不锈钢用于卫生应用的组件，并且具有多种尺寸和表面饰面。
Saniflo™FDA系列
Wilden Saniflo FDA Series pumpspossess the versatility to safely and efficiently pump a wide range of viscosities and shear-sensitive products.它们有各种材料，符合严格的FDA指南，可用于卫生过程应用。
FDA系列泵符合所有FDA，CE和1935/2004 / EC ANDREquirements。
Pro-Flo® Shift Series
Wilden Pro-Flo® SHIFT Series pumps provide energy savings and higher flow rates when compared to many competitor pumps. The secret is a first-class design that comes equipped with industry-leading air valves that offerup to 60% energy savings and 34% greater flow rates when compared to other AODD Pump technologies。
另外，为了增加可靠性，Pro-Flo Shift系列已经设计成增加吸力升降机和更少的移动部件。
Almatec Pumps
Biocor
BIOCOOR AODD泵是suitable for sterile applications within the pharmaceutical, biotechnology, and food processing industries， 和是built with compliance toEHEDG和FDA标准。
这些泵具有316L不锈钢的湿润表面，并设计有吸入和排放端口，兼容Tri-Clamp®等卫生配件。
E Series
AlmatecE系列泵是最新一代的塑料AODD泵，用于化学加工的液体和浆料转移应用。
该泵中的所有壳体螺栓固定在泵体两侧的隔膜型环上，增加扭矩负载，以实现更大的泵安全性。这些E系列泵是designed for low maintenance, with no drives, rotating parts, or shaft seals.
Next Steps
Air operated double diaphragm pumpsoffer a unique ability to pump a wide range of fluids found in the sanitary processing industries, and are suitable for a variety of applications。在某些情况下，例如泵送易燃液体时，这些类型的泵可以是泵的首选风格。
但是，在安装和操作方面时，AODD泵需要特别注意。
Having trouble deciding which AODD pump is best for your specific application?联系CSI AT（417）831-1411。We’ll be happy to assist you in choosing the best pump solution.
ABOUT CSI
Central States Industrial Equipment (CSI) is a leader in distribution of hygienic pipe, valves, fittings, pumps, heat exchangers, and MRO supplies for hygienic industrial processors, with four distribution facilities across the U.S. CSI also provides detail design and execution for hygienic process systems in the food, dairy, beverage, pharmaceutical, biotechnology, and personal care industries. Specializing in process piping, system start-ups, and cleaning systems, CSI leverages technology, intellectual property, and industry expertise to deliver solutions to processing problems. More information can be found atwww.xxshagua.com.。