Air & Electric Diaphragm Pumps

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Air and electric diaphragm pumps offer the user options for those tough and/or accurate applications.  Diaphragm pumps are constructed of various materials and with optional methods to drive them making them suitable for almost any environment. Diaphragm pumps are a type of positive displacement pump. They utilize a sealless design in which the plunger (piston) moves a diaphragm that in turn increases and decreases the volume of the pumping chamber and thus draws in and forces out the pumpage. Check valves ensure one-way flow.

As an alternative to direct mechanical drive, the plunger can also be driven by magnetic force. In magnetic designs, the plunger rod is surrounded by a coil. When the coil receives an external electrical impulse, it magnetically moves the plunger assembly a specific distance, which in turn moves the diaphragm. Typically, the electrical signal energizing the coil terminates just before the plunger is fully extended. The plunger comes to a stop and the pumpage is at its maximum compression. The plunger is spring-loaded and thus returns to its original position. The electronic actuation makes for easy control of pumping rate.

Other drive mechanisms for diaphragm pumps are hydraulic fluid and compressed air.

Reciprocating pumps create pulses in the flow of the pumpage: the fluid accelerates during the compression phase of the pump stroke and decelerates during the suction phase. The resulting pressure pulses cause inefficiencies and can lead to serious vibrations that can damage parts of the discharge system, so reciprocating pumps often require pulsation dampeners.

These devices consist of a chamber into which the fluid flows during the pump’s compression stroke. A flexible diaphragm separates the fluid chamber from an air chamber. The air chamber is pressurized with air or nitrogen to about 50% of the system’s discharge pressure. As the pump compresses the fluid into the discharge piping, some fluid enters the pulsation dampener and compresses the air in the dampener. When the pump goes into the suction phase of its stroke, pressure in the discharge piping falls below the pressure in the air chamber of the dampener and thus the compressed air forces fluid out of the dampener. This cycle allows flow to continue during the suction phase of the pump cycle and provides a smoother flow.

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Wilden

Wilden Air Operated Double Diaphragm Pumps (AODDP's)

Industrial Applications

Pro-Flo Metal

Wilden's revolutionary Advanced™ Series pumps were specifically designed for maximum performance and efficiency. The bolted configuration of these pumps ensures total product containment while the redesigned liquid path reduces internal friction to maximize output and efficiency. A variety of materials are available to meet abrasion, temperature, and chemical compatibility concerns. The Advanced™ Series metal pumps are offered in die cast aluminum, stainless steel and alloy C. Elastomers that are available are Buna-N, Neoprene, Viton, Wilflex, Polyurethane and Teflon.  A variety of options such as ANSI and DIN flanges and specialized air distribution systems are available to meet your specific application requirements.

Wilden's legendary Original™ Series pumps were designed for demanding utilitarian type of applications that require a robust design. The clamped configuration is a classic design that evolved from 1955 with the invention of Jim Wilden's first air operated double diaphragm pump. The Original™ Series pumps ensure reliability without sacrificing ease of maintenance. The metal pump line lends itself to various processes and waste applications in a multitude of materials consisting of cast iron, aluminum, stainless steel and alloy C.  Elastomers that are available are Buna-N, Neoprene, Viton, Wilflex, Polyurethane and Teflon to meet your abrasion, temperature, and chemical compatibility concerns.

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Pro-Flo Plastic

Wilden's revolutionary Advanced™ Series pumps were specifically designed for maximum performance and efficiency. The bolted configuration of these pumps ensures total product containment while the redesigned liquid path reduces internal friction to maximize output and efficiency. A variety of elastomer options including Buna-N, Neoprene, Viton, Wilflex and Teflon® PTFE are available to meet abrasion, temperature, and chemical compatibility concerns. The Advanced™ Series plastic pumps are offered in polypropylene and PVDF with a variety of options such as ANSI and DIN flanges and specialized air distribution systems are available to meet your specific application requirements.

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Wilden's legendary Original™ Series pumps were designed for demanding utilitarian type applications that require a robust design. These pumps ensure reliability without sacrificing ease of maintenance. The Original™ Series lends itself to various processes and waste applications and is available in Polypropylene and PVDF (Kynar).  Available elastomers are Buna-N, Neoprene, Viton, Wilflex, Polyurethane and Teflon to meet your abrasion, temperature, and chemical compatibility concerns.

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Sanitary

Saniflo™ Series

The Saniflo™ Series pump line is specifically designed to meet the strict guidelines established for sanitary process applications. Saniflo™ pumps incorporate a straight flow-through design, large solids passage and efficiencies to insure process success. They have a shear sensitive operation, Tri-clamp® style fittings, and are offered in various surface finishes. This line also offers pumps that are CIP (clean in place) and COP (clean out of place) for ease of use and maintenance. Wilden consistently meets and exceeds industry standards by having the certifications needed (FDA, USDA, 3A, ATEX) in order to help refine your process.

  • High purity
  • Meet 3A, FDA and EHEDG requirements

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Almatec

Almatec Air operated diaphragm pumps

Industrial Applications

UNITEC™ Series

The UNITEC™ series includes a complete line of versatile pumps made for nearly any process and waste application. With their machined sealing surfaces and superior product containment, the UNITEC™ pumps will exceed your expectations about how an air-operated double-diaphragm pump should perform. Put the latest Wilden technology to the test.

By adding new materials to Wilden's already extensive line of products, the Teflon® PTFE and polyethylene pumps in the UNITEC™ series extend the application limits where an AODD pump can be used. The conductive plastic pumps in this series are designed to safely discharge static electricity when hazardous static build-up is present in a process system. The pump's ability to safely discharge this static electricity also meets the ATEX 100 directive standards for Europe.

High Purity

The A-Series Design Advantages
  • Machined plastic pumps
  • Polyethylene
  • Conductive polyethylene (ATEX compliant)
  • Teflon® PTFE
  • Conductive Teflon® PTFE (ATEX compilant)
  • Wetted and center housing are the same material for superior chemical resistance
  • Consistent pump design from 6 mm (1/4") to 51 mm (2") size
A-Series Flexibility
  • A variety of porting configurations are available depending upon the position of the center section and location of plug
  • 25 mm (1") and above UA pumps have both a flanged and threaded liquid connection (FNPT/BSP with ANSI or DIN)
  • Many accessories and configurations are available to customize the pump for your application

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Biocor high purity EHEDG

The ALMATEC pump series BIOCOR is especially designed for sterile applications within the pharmaceutical, biotechnical and food industry. The air-operated diaphragm pumps are EHEDG certificated and ATEX conform according to 94/9/EG directive. BIOCOR pumps with a material combination of PTFE (diaphragms, ball valves, O-rings) equipped with a diaphragm monitoring are 3-A approved. The special design with the integrated cleaning-system enables the CIP (clean in place) and SIP (sterilization in place) capability.

Always a demand for sterile applications: all housing parts of the BIOCOR pumps show no horizontal areas. Each pump comes with four ball lifting magnets, which can be attached to the pump housing from the outside at the location of the four ball valves. The ball valves are risen up magnetically out of their seats and the pump is drained entirely without having to be dismounted. There are no mechanical ball lifters with parts and seals in the wetted area.

The two pump sizes B 20 and B 32 achieve max. capacities of 3.5 and 7.5 m³/h resp. a max. discharge pressure up to 7 bar The material for the wetted housing parts is electro polished SS 316 L (1.4435, according to Basel Standard II, ferrite content < 1%) with a surface roughness of < 0.4 µm. The center block is made of polyethylene conductive.

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Wanner

Wanner Hydra-cell hydraulically-operated diaphragm pump

High Pressure Industrial

No matter what the application, the Hydra-Cell Diaphragm Pump is built tough to get the job done without the constant worry about pump failure and costly repairs.

Clean. Dirty. High pressure. Low pressure. Thick. Gooey. Abrasive. Flammable. Perishable. Caustic. Wettable Powder. Hot...

These are just a few of the words our customers use to describe their pumping applications. And each and every time, we have a Hydra-Cell pump solution to match it. From liquid butane to drinking water to ceramic slurries, the Hydra-Cell Diaphragm Pump is in a class of its own in handling the full spectrum of common industrial and commercial fluids. 

For additional information:

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Chemical Feed

Compact, cost-effective pump systems for high-performance metering applications.

New Hydra-Cell Metering Pump solutions build upon our industry hallmark Hydra-Cell pump technology. With 30 plus years of proven performance and reliability in the toughest industrial equipment, process and metering applications, these pumps are the undisputed pump of choice for trouble-free operation where other pumps simply cannot survive.

Grundfos

Grundfos Digital dosing chemical feed pumps

Chemical Feed - Electric Motor Driven

The innovative technology of the DME range ensures smooth and constant dosing at any time. Simply set the dosing capacity at the user-friendly display, the pump will do the rest. The simple multilingual menu gives access to many standard control functions such as pulse, timer, batch and anti-cavitation control.

Precise Dosing of Chemicals
  • Water and Waste water treatment
  • Cleaning installations
  • Swimming pool water
  • Process plants
  • Pulp and Paper
  • Textile industry
Features & Benefits
  • Precise capacity setting in milliliters or liters
  • Operation panel with plain-text display at the side or at the back
  • Key lock
  • 0/4-20 mA control
  • Pulse-/timer-based batch control
  • Anti-cavitation function
  • Easy calibration function
  • Field bus communication module (option)

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LMI

LMI chemical feed pumps

Electric solenoid driven
Series AA Metering Pumps
  • Rigid Stroke bracket assembly for highly accurate / consistent dosing performance
  • Advanced control options for simplified system integration (pulse multiply / divide, 4-20 mA. remote on/off
  • 5-level power control option to reduce system shock and extend the life of the pump
  • External pacing for flow proportional applications
Series B and C Chemical Metering Pumps

Series B and C Chemical Metering Pumps have been an industry standard for over 20 years. The familiar yellow and black pumps have a rugged, totally enclosed, chemically resistant housing for protection in the harshest environments. Encapsulated electronics and a rigid housing and stroke bracket ensure years of precise, repeatable performance. Several control options are available for all applications and budgets.

Type “9” control is designed for easy integration into chemical feed systems. The stroke rate may be controlled manually or by an external signal generated by a flow meter, controller, transmitter, PLC or other device. Divide or multiply a digital (pulse) input or program a response to a milliamp (4-20, 0-20, 20-4, 20-0) input. Remote on/off and low level inputs are standard. The clear liquid crystal display provides the user with operational status. The unique 5-level power control reduces system shock and extends the life of the pump. The optional Digi-Pulse Flow Monitor verifies chemical flow and provides an alarm output.

Click on photo for additional information on LMI Chemical Series.

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Neptune

Neptune Chemical feed pumps

Chemical Feed

Neptune Hydraulic Diaphragm metering pumps are typically used for chemical metering in process and agricultural industries. Chemical metering pumps are available for high and low pressure applications with manual and electronic stroke control.

For additional information:

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