Gear Pumps Metering Pumps
Description
Gear pumps are a type of positive displacement pump that utilize the movement of two or more rotating gears to move fluid. They are known for their ability to provide a sustained, pulse-less, and continuous flow, which is crucial for applications requiring precise fluid delivery. Metering pumps, on the other hand, are designed to deliver precise volumes of fluid, often used in applications where accurate dosing is critical.
Working Principle
Gear pumps operate by using a rotating assembly of two gears—a drive gear and an idler—to create suction at the pump inlet, drawing in fluid. The liquid is then directed between the teeth of the gears and the walls of the casing to the discharge point. As the liquid travels from inlet to outlet, the volume decreases, causing a buildup of pressure. This mechanism allows gear pumps to maintain a continuous flow even during changes in operating speeds or pressures, making them highly useful for applications requiring consistent fluid delivery.
Metering pumps, such as piston and syringe pumps, use reciprocating pistons or a plunger mechanism to move fluid. These pumps are designed to deliver precise amounts of fluid, with flow managed through mechanisms like a screw attached to a pusher block. This precision makes them ideal for applications where exact dosing is necessary.
Applications
Gear pumps are commonly used to transfer fuel oils such as gasoline, diesel, and kerosene. They are also employed in high-pressure applications like elevators, damper controls, and other hydraulic devices. Metering pumps find their applications in industries requiring precise fluid dosing, such as chemical processing, pharmaceuticals, and water treatment.
Advantages over other Manufacturing - Abrasives, Grinding and Finishing
Gear pumps offer greater accuracy in pumping specific amounts of fluid due to their tighter pumping tolerances. This precision is advantageous over other manufacturing processes like abrasives, grinding, and finishing, where maintaining consistent fluid flow can be challenging. The continuous and pulse-less flow of gear pumps ensures that the fluid delivery remains stable, which is crucial for processes that require uniformity and precision.
Limitations
Gear pumps are limited to handling clean liquids due to their tight tolerances. They are not well-suited for abrasive or extreme high-temperature fluids, as these conditions can lead to increased wear and reduced efficiency. Additionally, the volumetric efficiency of gear pumps is poor at low speeds and low flow rates, necessitating operation close to their maximum rated speeds for optimal performance.
Considerations
When considering gear pumps, factors such as initial costs, operating expenses, durability, accuracy, and maintenance costs should be evaluated. Gear pumps are typically less expensive and simpler to maintain than other types, but their efficiency can decrease with wear, leading to increased slippage and reduced flow. Metering pumps, while offering high accuracy, may have higher initial costs and require more maintenance due to their complex mechanisms. Durability and the ability to handle specific fluid types should also be considered when selecting the appropriate pump for an application.
from Sames North American Corporation
The gear pump enables liquid, solvent and water-based paints for general industrial applications to be sprayed using all the SAMES automatic spray guns (PPH 308, TRP 500, NANOBELL2, etc.). This type of pump has (7) displacements defined by the number of cubic centimeters of paint delivered per... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Power Source: Air or Pneumatic
- Discharge Pressure: 7.3 to 29.0
- Pump Housing Material: Stainless Steel
from GRI Pumps (A Gorman-Rupp Company)
The gear pumps are designed primarily for metering and transfer applications. Their modular design allows a wide variation of flow ranges with a standard parts set. These pumps provide a broad class of industrial pumps in flow ranges of 10 ml. per minute to 1 gal. per minute. All of the gear pumps... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 30.0
- Liquid Flow: 0.5283
- Discharge Size: 0.188
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all. started. It contains more bearings for higher load-carrying capacity,. resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 72.5 to 87.0
- Liquid Flow: 0.2642
- Discharge Size: 0.125
from Chemac Inc./Uraca/Uhde HPT/Gather/BHDT
Non-Pulsating Pumping of Non-Lubricating Liquids. With its magnetic drive gear pump Gather offers an important product for transfer and metering applications. Utmost manufacturing precision, a variety of materials as well as non-pulsating pump operating characteristics are indespensible product... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Media: Chemical Pump
from Witte Pumps & Technology GmbH
CHEM – high precision gear pump for conveying low to medium viscosity fluids. CHEM gear pump for conveying and metering of fluids with low medium viscosity. The application range goes from classic transfer and metering tasks in the chemical and pharmaceutical industries up to the conveyance of... [See More]
- Pump Type: Dosing Pump; Gear Pump; Positive Displacement Pump
- Discharge Pressure: 1740.0
- Liquid Flow: 2.0000 to 20.0000
- Media Temperature: 580
from Scherzinger Pump Technology Inc.
The Pumps can be used: - for low to medium-viscous, particle-free liquids. - for lubricating fluids. - for light fuel oils. - for variable rotation applications via reversing feature option. - for speeds of 0 - 5,000 RPM. Frequently Handled Fluids: - Lube Oils. - Hydraulic Oils. - Emulsions. -... [See More]
- Pump Type: Dosing Pump; Gear Pump; Positive Displacement Pump
- Media: Chemical Pump
- Power Source: DC
- Industry Served: Automotive, Machine Tool, Medical, Power Generation
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all. started. It contains more bearings for higher load-carrying capacity,. resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 87.0 to 101.5
- Liquid Flow: 0.2642
- Discharge Size: 0.125
from Witte Pumps & Technology GmbH
PURO – Precision gear pump for the food Industries. Easy to clean and individually tunable. Stainless steel precision gear pump for conveying and metering of fluids with medium to low viscosity. Through decades of experience in design and selection of optimal materials, this type of pump... [See More]
- Pump Type: Dosing Pump; Gear Pump; Positive Displacement Pump
- Discharge Pressure: 1958.0
- Liquid Flow: 2.0000 to 20.0000
- Media Temperature: 392
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all. started. It contains more bearings for higher load-carrying capacity,. resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 72.5 to 87.0
- Liquid Flow: 0.5283
- Discharge Size: 0.125
from Witte Pumps & Technology GmbH
Metering pumps are used in different sectors. For example, in fiber production. Synthetic chemical fibers are gaining importance. They are required for many different applications such as textiles, linens, brushes, etc. WITTE dosing pumps ensure that the polymer melt in the process is transported... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Media Temperature: 662
- Discharge Pressure: 3625.9
- Power Source: NoSourceIncluded
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all. started. It contains more bearings for higher load-carrying capacity,. resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 72.5 to 101.5
- Liquid Flow: 0.5283
- Discharge Size: 0.125
from Witte Pumps & Technology GmbH
CHEM MINI - Gear pump for conveying and metering of fluids with low to medium viscosity. The CHEM MINI gear pump is particularly suitable for precision metering tasks of low to medium viscosity media. The application range goes from classic transfer and metering tasks in the chemical and... [See More]
- Pump Type: Dosing Pump; Gear Pump; Positive Displacement Pump
- Discharge Pressure: 1740.0
- Liquid Flow: 2.0000 to ?
- Media Temperature: 580
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all. started. It contains more bearings for higher load-carrying capacity,. resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 43.5 to 58.0
- Liquid Flow: 0.7925
- Discharge Size: 0.125
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all. started. It contains more bearings for higher load-carrying capacity,. resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 58.0 to 72.5
- Liquid Flow: 0.7925
- Discharge Size: 0.125
from Diener Precision Pumps LP
The flagship of our product line, the Extreme series is where it all started. It contains more bearings for higher load-carrying capacity, resulting in long life at relatively high pressures. The innovative body forging allows a wide range of inlet/outlet port locations, simplifying the plumbing and... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 29.0
- Liquid Flow: 1.0567
- Discharge Size: 0.125
from Diener Precision Pumps LP
The Optima series is designed for applications requiring accurate flow. in a very small package size. The wetted materials and gear construction. are the same as those of it ’s larger cousins, but by removing one. of the shaft bearings the overall length is much shorter. In addition,the... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 58.0 to 87.0
- Liquid Flow: 0.5283
- Discharge Size: 0.125
from Diener Precision Pumps LP
The Silencer series is everything a gear pump should be: Simple. Leak-free. Chemically inert. Reliable. Economical. It ’s manifold mounting simplifies the plumbing and reduces the installed cost in your system. A magnetic coupling ensures the pump will never leak and wetted materials are... [See More]
- Pump Type: Gear Pump; Positive Displacement Pump
- Discharge Pressure: 58.0 to 72.5
- Liquid Flow: 0.2642
- Discharge Size: 0.331