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Dynex News
Congratulations go out to the winners of the Dynex Halloween chili cook-off and costume competition. Luis and Danine took the prize for their chili and Ann (Raggedy Ann) and Danine (60s Hippie) won the best costume awards.
We hope you had a great Halloween too!
We are pleased to introduce Liz Bast as our new Inside Sales Representative. Liz will be involved with all aspects of daily sales operations. Her broad experience and attention to detail make her well suited to providing a great customer support experience.
We are excited to have Liz as part of the Dynex team. Please join me in welcoming her aboard!
October 22-25, 2019 – Booth 4D03 – BEXCO in BUSAN
Dynex will be exhibiting its pumps & valves for the marine industry at KORMARINE 2019. Kormarine is an international marine, shipbuilding, offshore, and oil & gas exhibition held every two years in Busan, South Korea. Exhibitors present the latest in diesel engines, pumps, compressors, valves, navigation systems, and communications.
Over 50 shipyards are based in Busan and neighboring areas. Decision makers from shipbuilding and maritime industries all around the world attend.
About the show:
- 900 Exhibitors from 46 countries (40,000 sqm)
- 36,000 Visitors from 80 countries (12,000 visitors from Shipyards)
Location:
BEXCO – Busan Exhibition & Convention Center,
Haundae-gu, 612827 Busan, South Gyeongsang, South Korea
Hours:
Tuesday, 22 10:00 – 17:00 h
Wednesday, 23 10:00 – 17:00 h
Thursday, 24 10:00 – 17:00 h
Friday, 25 10:00 – 16:00 h
Join us at Booth 4D03 at KORMARINE. October 22-25, 2019.
For more information click here.
Introducing the new and improved PF500 checkball pump! The same checkball pump capabilities with more output flow choices and cover options.
Dynex now offers a three-piston and four-piston pump version that can reach flows as low as .12 gpm (0.45 l/min). All high pressure (H) versions have pressure capabilities of up to 15,000 psi (1040 bar).
Reduced power requirements, as low as 1.0 HP at 10 000 psi (0,75 kW at 700 bar) @ 1500 rpm, make these pumps ideal for use in remote locations with limited power supply.
These compact pumps can be used on portable power packs for high-pressure torque wrenches and other service tools.
Click here to review the product specifications or contact Dynex today to receive a quote!
Sometimes, a hydraulic power unit is laid out in such a design that the pump and electrical motor must be mounted on top of the reservoir. In the case of a Dynex checkball pump, this is not the most advantageous situation for the pump. A checkball pump has a lot of great attributes, but one of its limiting performance factors is the ability to pull a vacuum.
When this happens, customers sometimes try different methods to prime and plumb the checkball pumps. This article will share some of our experience and provide a proven method used by our system builders.
When the above scenarios occur, Dynex mounts the pump with the inlet still facing upward or at the “12 o’clock” position. In many cases this is the highest point in the pump, so we want any air to have the easiest path to escape.
The next step is to plumb in a “Suction J line”. This is done by installing a 6” run of tubing or pipe. This is installed vertically up from the pump housing. This will allow for a column of oil to be available when the pump starts.
At the highest point of the “Suction J line”, we install a tee fitting with the topmost port capped with a plug. After that, we extend horizontally from the tee fitting away from the pump, and then finally down into the reservoir. You could add a piece of hose here for this as well (designer’s choice).
Once all fittings are tight and ready for start-up, follow the next steps to bleed any air and prime the pump:
- Remove the plug at the top of the tee fitting and use this to fill the pump housing with oil. You will see air bubbles start to push past the oil being filled into the pump and inlet hose.
- Re-install the plug and make sure it is tight to ensure no entrained air would enter the inlet plumbing.
- Turn on the pump for about 15-20 seconds. This “burping” of the pump will help push any residual air through the pump and allow you to determine if you need to open the plug at the top of the pump to remove any additional trapped air.
- Additionally, you want to make sure the outlet of the pump is either fed directly back to tank with no restriction, or that the pressure controls are at their lowest possible setting.
- Repeat the above steps 1-3 as needed until you feel that the pump is fully primed.
This provides a functional method to install and use a Dynex checkball pump when flooded suction is NOT a viable option.
If you are unsure of the installation best practice or are interested in a power unit option from our team, please contact us and we would be happy to assist.
For more information visit our Power Units page, or feel free to contact us.
Dynex would like to congratulate long time employee Jeff Coppersmith who is retiring after 34 years of service as a Manufacturing Engineer.
Jeff was a vital and reliable partner in our day-to-day operations, and is responsible for driving positive change and making Dynex products better.
Jeff, we thank you for many years of dedicated hard work and we will miss you!
Attention Dynex Pewaukee visitors:
We will soon undergo parking lot repaving from Sept. 23rd – Oct. 5th. Please use caution while entering the property and look for any signs indicating alternative visitor parking. Truck deliveries will be accepted but may be rerouted. We appreciate your patience and understanding as we upgrade our facility!
Please note that our Corporate Headquarters in Pewaukee, WI and our Power Units Division in Ashland, MA will be closed on Monday September 2, 2019 in observance of Labor Day.
We hope that you enjoy your weekend. We’ll be back to assist you on Tuesday, September 3rd.
Bearing life is typically expressed in B10 or B50 and is a value of hours. This is simply an estimate on how many operating hours at a given load a bearing will last prior to failure.
In working with our checkball pumps, Dynex Sales and Engineering are constantly reviewing bearing life with applications to evaluate what product will be the best fit. A simple scenario is provided in the following paragraphs.
Scenario:
Customer A wants to provide a Dynex hydraulic pump for their system that is critical to operation within a plant. This plant needs to operate a hydraulic press at pressures up to 10,000 psi and the duty cycle is continuous since the press runs all day and night.
After reviewing the options in the catalog, the customer selects the following option:
- PF2007H-DA-10
- B10 = 140hrs. @ 10,000 psi
Proposal:
Dynex understands from the customer that this application is constant duty and will see continuous operation throughout the day. The customer also wants to avoid downtime as much as possible since the plant has tight schedules.
After considering the options, the next possible solution is to go to the following pump:
- PF3011H-DA-4-10
- B10 = 890hrs. @ 10,000 psi
This pump uses half of the eight pistons in the pump for active pumping. This is referenced by the number “4” in the model code. By reducing the load on the bearing by 50%, we increase the life of the bearing exponentially.
This pump will deliver the same amount of output, but due to the reduced load on the bearing, the B10 life increases by a factor of 6 times!
After consideration, the small increase in price for the next larger pump is worth the benefit of prolonged operating life in the system.
Conclusion:
It may be worth considering a larger pump product with fewer active pistons to increase the bearing life. The return on this is not linear but exponential.
If you would like to look at some further explanations of how bearing calculations are accomplished, some links to major suppliers of rolling element bearings are listed below:
Do you have to consider life of the product in a tough application? Talk with one of our team members to determine the best solution.
We are pleased to introduce Darrin Pinnow as the newest team member at Dynex/Rivett Inc. Darrin’s official title will be Regional Sales Representative. Darrin will be the primary point person for all Sales, Support, Training, Customer Visits, etc.
We are excited to have Darrin as part of the Dynex team. His previous experience in Fluid Power and with distribution sales make him a great addition that we think will benefit everyone. Please join us in welcoming him aboard!