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Centrifugal Pump Startup

Centrifugal Pump Startup

Problem: An internationally known tool manufacturer located in the Pacific Northwest was experiencing severe pipe vibration in an overhead manifold system. The system delivers coolant to several production grinding machines. The coolant is delivered to the manifold by a 300 gpm centrifugal pump located in a reservoir on the plant floor. When the pump is started, a ball valve at the pump discharge is opened and fluid is pushed vertically up to the horizontal manifold. The manifold does not stay filled with liquid during idle periods so, when the pump is started the coolant flowing into the manifold must first push the air trapped in the manifold out the machine coolant nozzles before coolant reaches the machines. Since air moves more quickly out of the nozzles than liquid, when the coolant reaches the nozzles the velocity of the coolant is instantly reduced and a water hammer effect occurs creating severe pipe vibration.

Chemical Feed

Chemical Feed

Problem: Japan Machinery Company, a manufacturer of water treatment equipment, uses air operated chemical feed pumps to inject various chemicals and additives at very high pressures. The reciprocating action of the pumps produced excessive pulsation and vibration in the discharge pipes of the system, which caused broken pipes, failed gaskets, damaged valves, and pulled pipe supports from their foundations.

Cleaning Products

Cleaning Products

Problem: Pumping household cleaning products such as oven cleaner, furniture polish, floor waxes, and starch. After blending of various chemicals to manufacture the final products, the product is pumped into various holding tanks within the plant. During this process the product travels through long lengths of piping to various filling locations. Foaming and aerating of the various cleaning products created a problem with the filling process of aerosol cans. Also, due to the long lengths of piping, the pumping action of the diaphragm pump created pipe vibration and potential leaks at fittings.

Waste Liquids

Waste Liquids

Problem: A large manufacturing plant located in Japan uses air operated high pressure injection pumps throughout their plant to pump out waste liquids from reactor vessels. The reciprocating action of the pumps creates a pulsating flow which vibrates the plumbing, producing loud noise resulting in worker complaints and possible safety issues.

Decontamination

Decontamination

Problem: A decontamination facility pumped acids and water through a series of 15" spray nozzles to rinse radiation from contaminated metals. However, the pulsating action of their reciprocating pumps caused uneven spray into the rinse tanks, and the metals were not rinsed completely.

Descaling

Descaling

Problem: Rocky Mountain Steel Mills in Pueblo, CO uses two Myers/Aplex MA-240M quintuplex 200 HP plunger pumps to descale the raw material before it is sent through the forming rollers that create the final product. Each of these pumps produces 100 GPM at 2,200 psi. The reciprocating action and high pressure created by these pumps causes severe shaking of the pipes, valves, and pipe supports in the system. More critical to the operation, the pulsating flow can cause erratic descaling of the raw material. This erratic descaling can cause damage to the form rollers and can make it difficult for the steel mill to achieve consistent quality in their final product. This style of pump also requires a smooth flow of fluid to the inlet to work properly.

View All Dosing Filling Water Hammer Spill Prevention Filter Metering Injecting Pulsation Dampening Spray Coating Transfer Inlet Stabilization
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