Keene Engineering, Inc.

23 hours ago

This is a 37 hp EFI Briggs and Stratton engine with a 263 air compressor running off the opposite side of the engine. The package is mounted on a custom 5” dredge frame. This is to be used for reclamation dredging. Great looking package. ... See MoreSee Less

Keene Engineering, Inc.

2 weeks ago

Sleeker lines with a tapered sluice box and slightly flatter sluice.
We have improved grizzly classifier by making a little wider and tapering up the sides
The rear hopper support and be raised by 25% allowing larger rocks to pass through. ... See MoreSee Less

Keene Engineering, Inc.

2 weeks ago

Rich does pay attention. This time he attached the flood hopper and sluice trough extension in place of the flare. He also stepped up to a larger pressure hose. Just the larger pressure hose should provide about 25% more water flow into the sluice box. Rich also made a nice little PVC Stand. Not great in the field but ideal for home usage. ... See MoreSee Less

Keene Engineering, Inc.

2 weeks ago

Using different types of pumps for dredging and high banking
Typical Keene pumps run in the 150 foot head range. Pump head is a function of pressure. 150 % 2.3 = 65 psi. This high head pump works great for dredging and high banking. Our pump are much lighter, more compact and extremely higher performance, than any other type of pump. Most of our pumps can accommodate the use of an air compressor at a latter date.
Many people buy the cheap Chinese or Harbor freight water pumps that do not work well. Keene now builds pumps that will fit on a 5/8th threaded shaft and a 3/4” keyed shaft for the 4-6.5 H.P. motor configurations. We also make our larger pumps that will accommodate a 1” threaded shaft and 1” key way shaft from 8” to 23 Hp. motors. The cheaper engine are ok for the miner that does not use his dredge/ high banker more than a few weeks a year. If you are a serious miner spend the money and get a engine that will last for years of hard use.
Typical trash and semi trash pump run at 80 to 90 foot head range and produce only 35 psi. These pump work ok for high banking and poor performance at best on a dredge. Dredges like a balance of both volume and pressure. Only Keene pump will work with a air compressor.
Electric pumps home owner types work ok, for very small high banker and not at all for a dredge. The head lifts on these pump are typically around 25 foot of head only around 10 to 15 psi, so this means you need tp run short hoses and make sure the hoses are largest that the pump will take. Since the head lift is so low these are extremely sensitive to longer, small diameter hose and the high banker should be a water level.
12 volt pumps are extremely low head left around 5 to 10 foot head lift and under 5 psi. So it is very important that we keep the high banker at water level and you can not use a spray bar. Spray bars will restrict the pump to much and you will reduce the water flow by 80%. So the only way to make a 12 volt pump work is
High banker is at water level. Use large short hoses to reduce friction loss Use a flood header to provide minimum friction loss and optimum water dispersion.
Mark ... See MoreSee Less

Keene Engineering, Inc.

2 weeks ago

Here are some pictures from a customer or ours. James just purchased one of our #STE sluice trough extensions for $22.00 and our #MMFHR Mini Max Flood header for $49.95 and he riveted the flood header to the sluice trough extension with a little bit of silicone sealer to eliminating any leakage.
James set it up with a 110 volt pump that should work fine however, he made the mistake of running a 3/4 standard garden hose. Larger hoses are critical when using a small 110 volt pump and even more so when using a 12 volt pumps. James is not setting the sluice box as intended, however it should work fine. The STE and Flood header is designed to be in place of the Sluice box flare. The bolt patterns are the same. The sluice is meant to be feed with pre classified material. The spray bar he is trying is a good idea however, back to no head pressure, so the flow will be restricted and he will not have enough flow to make the sluice box work properly. James also turned the hopper around and ran some flatten wire however this would not work very well since the gravel will not slide off very easy. He would need grizzly bars for the rocks to slide off.
Using different types of pumps for dredging and high banking
Typical Keene pumps run in the 150 foot head range. Pump head is a function of pressure. 150 % 2.3 = 65 psi. This high head pump works great for dredging and high banking. Our pump are much lighter, more compact and extremely higher performance, than any other type of pump. Most of our pumps can accommodate the use of an air compressor at a latter date.
Many people buy the cheap Chinese or Harbor freight water pumps that do not work well. Keene now builds pumps that will fit on a 5/8th threaded shaft and a 3/4” keyed shaft for the 4-6.5 H.P. motor configurations. We also make our larger pumps that will accommodate a 1” threaded shaft and 1” key way shaft from 8” to 23 Hp. motors. The cheaper engine are ok for the miner that does not use his dredge/ high banker more than a few weeks a year. If you are a serious miner spend the money and get a engine that will last for years of hard use.
Typical trash and semi trash pump run at 80 to 90 foot head range and produce only 35 psi. These pump work ok for high banking and poor performance at best on a dredge. Dredges like a balance of both volume and pressure. Only Keene pump will work with a air compressor.
Electric pumps home owner types work ok, for very small high banker and not at all for a dredge. The head lifts on these pump are typically around 25 foot of head only around 10 to 15 psi, so this means you need tp run short hoses and make sure the hoses are largest that the pump will take. Since the head lift is so low these are extremely sensitive to longer, small diameter hose and the high banker should be a water level.
12 volt pumps are extremely low head left around 5 to 10 foot head lift and under 5 psi. So it is very important that we keep the high banker at water level and you can not use a spray bar. Spray bars will restrict the pump to much and you will reduce the water flow by 80%. So the only way to make a 12 volt pump work is
High banker is at water level. Use large short hoses to reduce friction loss Use a flood header to provide minimum friction loss and optimum water dispersion.
Mark ... See MoreSee Less