Venturi Dredge: Why does this work? : Non-Spudgun Related

Jun 25, 2008 · Well the venturi dredge is a strange animal Ive done a lot of reading on websites dedicated to gold prospecting and gouldeng is a great place to start For a production dredge, the exhaust pipe must be a certain length

Venturi effect - Wikipedia

The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section (or choke) of a pipe The Venturi effect is named after Giovanni Battista Venturi (1746–1822), an …

Gould Engineering Bazooka Dredge

The suction dredge was much smaller then the floating barges and requires far less equipment The suction dredge required only a centrifugal pump and gas motor, a float pontoon system, a sluice box, a venturi jet generator, a dredge hose, and a nozzle

Dredging - Wikipedia

These use the Venturi effect of a concentrated high-speed stream of water to pull the nearby water, together with bed material, into a pipe Air-lift [ edit ] An airlift is a type of small suction dredge

DIY PVC Dredge Nozzle (Part 1) - YouTube

Feb 22, 2013 · For best picture watch in HD720p! This video shows an easy way to make a PVC dredge nozzle that operates on the venturi effect I built 4 prototypes before settling on this one that works great

Explore the Venturi Effect with a DIY Vacuum Pump | Make:

Venturi discovered that air or water shooting through a constriction in a pipe can more or less magically drag fluid along with it from a second pipe, if the geometry of the pipes is just right Venturi really didn’t understand the reasons behind this phenomenon, now universally known as the Venturi effect

dredge suction nozzle | eBay

Find great deals on eBay for dredge suction nozzle Shop with confidence

venturi pump design gold suction rig - resitecepoxyvloerenbe

Venturi effect - Wikipedia build a suction dredge venturi nossle stone crusher plant How To Build Your Own Home Made Gold Dredge and all small suction gold dredges were The operator guides to the nozzle of the the suction in the hose is Gold Dredge Customer Service

Getting The Best Performance From Your Dredge - Gould Eng

Getting the best performance from your dredge involves some basic physics The most obvious problem is lifting or I should say sucking, in most cases, a dredge-hose full of sand, rock and water The actual lift will be from the nozzle end of the dredge-hose to the exit port of the venturi device

Venturi Water Pump - YouTube

Aug 04, 2010 · The PLCS Venturi Water Pump is a rugged, simple and lightweight air operated pump that requires no priming The straight through design eliminates clogging and …

Venturi Water Pump - YouTube

Aug 04, 2010 · The PLCS Venturi Water Pump is a rugged, simple and lightweight air operated pump that requires no priming The straight through design eliminates clogging and …

An In-depth Explanation of the Venturi Effect and its

The Venturi effect is a version of the Bernoulli's principle, but more specifically suited to the flow of fluids through a pipe When a fluid flowing through a pipe encounters a constriction, it means the surface area at that point has decreased, resulting in a smaller opening

How a Venturi Vacuum Works | Hunker

The idea for a Venturi vacuum has existed in theory for nearly 300 years, going back to physicists who studied how fluids work under pressure Daniel Bernouli and Giovanni Venturi are both responsible for discoveries leading up to the venturi vacuum pump The Venturi vacuum utilizes Bernouli's

Calculating the suction force produced by a Venturi

Apr 24, 2017 · Calculating the suction force produced by a Venturi Jan 5, 2010 #1 amrbekhit Dear all, As I understand the venturi effect, if a flow of water passes through a constriction, its velocity increases and its pressure decreases at the restriction The decrease in …

Venturi tube flow rate calculator - Pipe Flow Calculations

Venturi tube is used as flow meter in piping system and where Venturi effect is required Due to change in diameter from Venturi flow meter inlet to Venturi tube throat mean velocity is changing while weight flow rate remains constant

venturi type slurry pump - meccanicadistributoriit

Positive displacement and special effect types such as Venturi eductors are used but by far the most common type of slurry pump is the centrifugal pump Venturi Pump, Venturi Pump Suppliers and Manufacturers at ,

Venturi Vacuum - instructables

Venturi Vacuum: I wanted to use my air compressor as a vacuum pump For more info on how that works, see the wiki article on the Venturi Effect I made it at TechShop I took a piece of aluminum measuring 125x125x3" I only went 3" because the longest 075"

Diving Equipment Specialties

The standard Diving Equipment Specialties 4" diameter water dredge requires a minimum water pump of 350 GPM ( gallons per minute ) or more The pump is stationed in the boat or on shore as the situation dictates, and is connected to the dredge with 2" high-pressure hose

The Gold Dredge - Keene Engineering, Inc,

The vacuum on a portable dredge is created by a "venturi principal" A volume of water is pumped through a tapered orifice (jet), by a special designed water pump A high velocity jet stream is created within the jet tube producing a powerful vacuum

Exploring the Venturi Effect | COMSOL Blog

Exploring the Venturi Effect Caty Fairclough October 19, 2015 An apparatus known as a Venturi tube is the foundation for such device designs These tubes feature a narrow center and wider ends and, as we will discuss next, they can be used in a variety of applications

FOR A PORTABLE GOLD DREDGE - Rosewind Mining Supply

The vacuum on a portable dredge is created by a "venturi principal" A volume of water is pumped through a tapered orifice (jet), by a special designed water pump A high velocity jet stream is created within the jet tube producing a powerful vacuum

Willard Says……

Small cave-ins will have less effect on dredge operation because a significant proportion of the water required by the shape of the venturi throat, the size of the nozzles and water pressure are also critical to the performance of an efficient jet assist

mechanical engineering - Why is my Venturi pump much

Why is my Venturi pump much weaker than expected? Ask Question 5 0 I'm trying to make a simple Venturi tee which will have air flow through it while sucking some water from down below (like paint sprayers do) I want the device to pull the water to a height of 1 meter That

What Is the Venturi Effect? | Reference

The Venturi effect is the creation of a partial vacuum when the flow of a fluid is restricted, increasing its speed of flow Thus, a pipe with a fluid flowing through it which narrows at one point before widening again draws fluid from a second fluid-filled pipe attached to the narrow portion

Venturi / Ejector Design to Boost Water Flow using a Pump

Jul 09, 2015 · For a suction dredge assuming a primary pipe diameter of 2 to 4 inches and a centrifugal pump of 15 to 5 hp, I found after a lot of experimentation that water pressure a little over 30 psi and a jet orifice of 5/8 inch is optimum

DREDGE SUCTION NOZZLES - Willamette Valley

DREDGE SUCTION NOZZLES By: Dale Russell Suction nozzles can easily be home made , with some ingenuity & a few tools No matter what size you want to make from 1" up to 6", you can purchase exhaust pipe with that outside diameter (OD) Power jets measure the …

Suction Nozzles & Suction Tips - akminingbiz

Suction nozzles are suction creating devices that double as an intake nozzle on a suction dredge They in effect push material through the suction hose to the sluice box Suction tips are intake nozzles used in conjunction with power jets, the other type of suction creating device used on a suction dredge Suction nozzles are better for shallow water use, while power jets are preferred for

The Venturi Effect - Tech-FAQ

The Venturi effect is the phenomenon that occurs when a fluid that is flowing through a pipe is forced through a narrow section, resulting in a pressure decrease and a velocity increase

want to build a 4 inch dredge | Gold Dredging Forum

Aug 06, 2013 · The action is fairly simple; it is the effect of a high-pressure stream of water impacting upon the column of water and material in the venturi generating tube As the column of water moves away from the high-pressure stream of water, it leaves a vacuum behind it”

What is venturi effect? - Quora

The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section (or choke) of a pipe TheVenturi effect is named after Giovanni BattistaVenturi (1746–1822), an …

Liquid & Water Jet Eductors - Venturi Jet Pumps Ltd

Liquid & Water Jet Eductors Liquid Jet Eductors use the kinetic energy of a motive liquid to entrain another liquid, completely mix the two, and then discharge the mixture against a counter pressure and are used in large numbers throughout industry for pumping and mixing operations

dredge nozzle | eBay

Find great deals on eBay for dredge nozzle Shop with confidence

Gold Mining Dredge Venturi Tubes | Products & Suppliers

Find Gold Mining Dredge Venturi Tubes related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of Gold Mining Dredge Venturi Tubes information the physical laws of gases, the Venturi effect and Bernoulli’s … laws of physics to the dense fine regolith simulant a closed-cycle pneumatic mining

Venturi Principle|How do venturis work

In addition, the venturi effect is notorious fickle fluctuating with slight changes in flow rate, temperature, viscosity and other parameters The Airmaster leaves behind these penalties offering benefits for new and existing applications Fluid dynamics is a challenging topic and the venturi effect is frequently misunderstood or misrepresented

Intro to siphon and gravity dredges - GPEX

Jan 04, 2016 · In the gravity dredge however, the venturi made by the smaller pipe in the wye results in a faster local velocity that acts the same at the nozzle as a standard dredge This means that the nozzle will have a high velocity dragging force

Dredging pump, Dredging pumping - All industrial

The Warman® D, G, GH, GHP, GHPP and SHG pump range is the world’s standard for dredge and gravel applications The range provides excellent wear life while maintaining efficiency during the wear cycle providing the best

Venturi Effect - Quora

Sep 20, 2017 · The Venturi effect always produces a slight drop in pressure that is consistent with the increase in fluid velocity and reduction in the size of the piping The formula is [math]p1-p2 = (P/2)(v2^2 - …

25 DREDGE ASSEMBLY INSTRUCTIONS - Keene Engineering, …

25 " DREDGE ASSEMBLY INSTRUCTIONS TOP VIEW OF 25" DREDGE FRAME The dredge frame comes in 5 main pieces The vacuum on a portable dredge is created by a "venturi principal" A volume of water is pumped through a tapered orifice (jet), by a special designed water pump The proper sluice box adjustment can effect the recovery of values