Air diaphragm pumps shift waste water fast
The original Wilden air diaphragm pumps were conceived as a practical and robust way to shift large volumes of dirty water, often carrying a high proportion of solids. In one way, things haven’t changed much since that day in 1955, as people around the globe still generate huge volumes of waste water daily. Wilden AODD pumps remain one of the most cost-effective methods of dealing with the problem.
Humans have created waste in increasing quantities over the years. Increased levels of domestic sanitation, together with more sophisticated techniques for raising animals and agriculture in general are major causes. The practical outcome – large quantities of dirty water that need pumping away. Wilden air diaphragm pumps are ideally suited to the task, running virtually maintenance-free and with few moving parts.
Wilden AODD pumps require only a compressed-air source for power, and are thus suitable for construction sites and remote areas where electrical power may not be easily available. They also offer increased safety, as an air-operated pump cannot give rise to sparks or create an electrical hazard. Installation is simple, and for temporary use, takes only a matter of minutes. Some models of pump can be mounted on a mobile trolley for added convenience.
Wilden Saniflo HS Pumps Meet Hygienic Standards in Food & Beverage Manufacturing
The food processing industry has long had hygiene as one of its top priorities, yet every year, products are recalled to ensure that the public are not at risk from contaminated food or drink. Moving liquid products around a food-processing plant, particularly those with a high solids content, is no easy task, and many manufacturers turn to hygienic pumps from Wilden Pump & Engineering Company.
Formed in 1955, Wilden Pumps have a long-established reputation for being able to handle just about every type of fluid-based substance. The Wilden Saniflo HS series of hygienic double-diaphragm pumps for sanitary applications is a recent addition to the Wilden range, and play a vital role in preventing the risk of food poisoning incidents.
Wilden air-operated double-diaphragm (AODD) pumps have few moving parts, and comply with hygiene regulations in the United States and overseas. The U.S. Food and Drug Administration regulates the industry, and the Wilden Saniflo HS series complies with all relevant aspects of the FDA’s Hazardous Analysis and Critical Control Point (HACCP), a system in which food safety is addressed through the analysis and control of biological, chemical and physical hazards.Read More
Wilden Saniflo Pumps for Delicate Products
Industries that are subject to sanitary handling disciplines, and food and beverage manufacturers in particular, face multiple challenges when processing fluid products with a high solid content. Conventional pumps damage delicate foodstuffs like fresh berry fruits, pie fillings and curd-based dairy products, and producers use vacuum-controlled pumps such as the Wilden Pumps Saniflo VC range to handle products like these with ease.
Robust Yet Gentle Pump Units
Most people don’t give a second thought to the processing required to deliver food to the dinner table. When you’re washing, draining and packing hundreds of pounds of soft fruit every hour, you need a process that is robust yet gentle. Vacuum-controlled pumps do not need a mechanical rotor or impellor to move material from one part of the process to the next; they rely on vacuum technology to draw fluid into the pump, and compressed air to expel it.
Simple Vacuum-Driven Operating Principles
Constructed from stainless steel, the Wilden Saniflo VC Pump uses two simple, flap-type non-return valves to control the flow. On the intake “stroke”, a vacuum generator applies a vacuum to the vertical column of the pump. Atmospheric pressure pushes fluid through the first non-return valve and into the vertical column. Once the column is full, a level sensor turns off the vacuum.
On the exhaust stroke, compressed air replaces the vacuum in the vertical column. The fluid in the pump is forced back down the column, and out of the pump through the second non-return valve. The first valve prevents any fluid from re-entering the inlet manifold. During the cycle, the material being pumped is only in contact with the non-abrasive walls of the pump chambers and the low-resistance valve flaps.
Versatile Pumps Handle Viscous and Near-Solid Products
The characteristics of the Wilden Saniflo vacuum-controlled pump suit the transfer of highly viscous fluids, even those with minimal water content. Factories that process chicken fillets, or those that prepare ready-to-cook vegetables, generate a largely solid product that uses water solely as a carrier. The simple design of the Wilden Saniflo pump accommodates almost any processing medium like these.
The Saniflo range includes three sizes of pump. Denoted VC4, VC6 and VC8, these units accept 3-inch, 4-inch and 6-inch inlet pipes, respectively. They have a compact footprint, 12 inches by 15 inches, and the height of the vertical column is no more than 62 inches for the VC8 model.
Wilden Saniflo VC Pumps Operate Virtually Maintenance-Free
Assembly and installation of the Wilden Saniflo pump is straightforward with only a moderate level of training. Routine maintenance is quick and does not require lengthy periods of downtime for the production line. Air operation provides intrinsically safe performance and the Saniflo range complies with all USDA requirements for sanitary food and beverage handling.
The versatility of the Saniflo VC pump allows it to deliver a range of flow at variable pressures. The units are also self-priming and operate in run-dry conditions without damage to the pump. Find out more about Wilden Saniflo VC pumps and other types of positive displacement pump at www.wildenpumps.orgRead More
AODD Pumps for Offshore Production
Air-operated diaphragm pumps from Wilden Pump score heavily in offshore petrochemical production. On a daily basis, millions of barrels of crude oil are delivered from wells across the globe, and alongside the flow of product, a significant volume of waste is generated. Removing these unwanted by-products requires tough pump technology.
Few industries deliver the volume of fluid output that is delivered by the oil and gas sector, and waste is also created in huge amounts. Pumping fluids that may be highly viscous or contaminated with a high level of solids poses problems, particularly in a hazardous environment. Wilden AODD pumps are equipped to deal with these challenges.
Pumping Contaminated Fluids in Hazardous Areas
Wilden diaphragm pumps offer several distinct advantages for rig operators. Like many pumps designed for hazardous areas, Wilden units are driven by compressed air, eliminating the risk of sparks associated with electric motors. Intrinsically safe air operated pumps are usually available with Category 1 ATEX certification.
Self-Priming Low-Maintenance Pumps
Diaphragm pumps are a type of self-priming displacement pump, and do not require lengthy preparation prior to being put into service. They operate by using compressed air to alternately extend two flexible diaphragms on each pumping cycle, displacing fluid through a sealed pumping chamber. These are few moving parts to wear out.
Low maintenance requirements are a bonus in an industry where a breakdown can stop production for hours, costing many thousands of dollars in lost revenue. Wilden pumps are renowned for high reliability in arduous conditions, a factor that has supported the company’s growth since it was founded by Jim Wilden in 1955.
Corrosion-Resistant Pump Housings
A variety of different materials are suitable for making diaphragms for Wilden air diaphragm pumps, catering for a broad range of fluid characteristics. Corrosive liquids, highly abrasive solid suspensions and viscous fluids are all within the capability of Wilden AODD pumps.
Wilden PX8 Pumps Clean Up Oil Spills
The flexibility of Wilden pumps extends to use in situations where portability is a significant benefit. In the days and weeks following the BP oil spill in the Gulf of Mexico, demand for pumps to remove contaminated water from the area soared. Wilden responded by increasing production of its PX8 range of 2-inch metal pumps, designed to transfer large volumes of solid-laden waste.
The PX8 is available with aluminium or stainless-steel housings, and can be equipped with Neoprene, PTFE, Polyurethane or Viton diaphragms. It can pump nearly 200 gallons per minute at pressures up to 125 pounds per square inch, giving it a formidable ability to disperse a huge volume of material very quickly.
Find out more about Wilden PX8 AODD pumps and other types of diaphragm pump at www.wildenpumps.orgRead More
Wilden air diaphragm pumps are a type of positive-displacement (PD) pump – one that operates by forcing a known quantity of fluid into the pumping chamber and dispensing it at a constant rate. PD pumps are often referred to as constant-flow devices.
Advantages of Positive-Displacement Pumps
Positive-displacement pumps have specific advantages in many situations, the constant output rate being only one of these. Rotary motion or reciprocating motion are the usual methods of acutating PD pumps, and Wilden pumps fall into the latter category. A reciprocating pump typically uses a “back-and-forth” motion operating on either a piston or a diaphragm, and can be either single-acting or double-acting.
Single-acting pumps produce an output on only one half of the operating cycle, and thus have a more irregular output than the corresponding double-acting unit. The original Wilden pump contained two diaphragms, one operating on each half-cycle, and today’s Wilden pumps utilise exactly the same principle.
Rather than exploring the operating principles of double-diaphragm pumps, consider the advantages of the PD pump in action:
Pumping Fluids with High Solid Content
Industrial processes often use fluids that are far from pure or clean. At a basic level, in construction and mining, engineers often need to remove dirty water from a site, even if only to allow safe working. Many pump designs simply will not tolerate high levels of solid particles in the fluid being pumped, but positive-displacement pumps perform very well in this respect.
Pumping Viscous Fluids
Some liquids are plain sticky. Glue, syrup and paint are only a few of the many examples of fluids that are pumped from A to B on an hourly basis throughout industry. PD pumps handle this type of workload without fuss, and Wilden positive displacement pumps are no exception.
A workman on a construction site does not want to carry out a complicated procedure to prime a pump before it is ready to use. Typically, he will expect to drop one end of a hose in the water to be pumped and turn on the pump. Positive displacement pumps do just that, and this is a major advantage over competitive designs.
Reciprocating pumps, by definition, do not require a rotary actuator to operate. In the case of Wilden PD pumps, compressed air is used to force the diaphragms first in one direction and then the other. The absence of electricity as a driving force makes Wilden pumps intrinsically safe.
Find out more about Wilden AODD pumps and othertypes of positive displacement pump at www.wildenpumps.orgRead More
AODD Pumps from Wilden Pumps
Engineers find uses for diaphragm pumps almost everywhere. The simplicity of the design and ease of maintenance makes it popular in remote locations where breakdowns may be highly disruptive. In order to answer the question “How do they work?” take a look at a typical application.
Wilden pumps, like most double-diaphragm pumps, are good for moving viscous fluids or those with a high solid content. The original Wilden pump was designed for construction, mining and industrial use where slurries, mud, cement and similar liquids are common. These pumps needed to be robust, reliable and simple to fix – thus the Wilden double-diaphragm pump was born.
Positive displacement Pumps
Wilden pumps are positive displacement pumps – they move fluids using compartments or chambers with a variable volume. They have a reciprocating, or stroke-based, action; there is no rotary motion. There are few moving parts; usually only the diaphragms and the reciprocating shaft, driven by an air distribution unit, move to any significant degree.
The air distribution system [Item 2] alternately pressurises each air chamber [Item 1], compressing one diaphragm [Item 9] into the liquid chamber [Item 8] on each stroke and driving the horizontal piston [Items 3 & 4] from side to side. As the diaphragm is released, enlarging the liquid chamber, fluid is drawn into the chamber through the corresponding inlet check ball valve [Item 5].
The following compression stroke drives the fluid back out of the liquid chamber through the outlet check ball valve and into the discharge manifold [Item 7]. The piston has then returned to its starting position, emptying the second chamber and completing one full cycle.
The simplicity of the design and the air-driven operation resulted in a huge variety of uses for the new air-operated double-diaphragm pumps, or AODD pumps. Since no electrical supply is needed to drive the unit, safety in hazardous environments is maximised. Operation in remote areas, where a portable compressor may be available, is possible. This lead to the Wilden AODD pump becoming a regular feature of construction work throughout the United States, and eventually worldwide.
Today, many competitors imitate the original Wilden pumps without denting the reputation and market position of the first, and leading, unit of its type. Engineers around the globe are familiar with the Wilden name and reputation and continue to specify Wilden pumps by name.Read More