Q: How do gear pumps work?
It is important to understand the operating principles of a gear pump. There are three main components:
- two gears:
- the driver is engaged directly by an electric motor or by magnetic coupling; and
- the other gear that is driven and is called the idler gear
- the pump body. The body houses the pumping chamber
In the body, in correspondence with the meshing zone, there is a suction area and a discharge channel (located on the opposite side of the suction area). The fluid passes around the outside of the gears and not between the gear teeth. The fluid enters the pumping chamber at the suction area, where pressures are at their minimum and exits the chamber at the discharge channel, where pressures are their highest.
Q: What are the advantages of a gear pump?
The advantages of gear pumps are:
- Positive Displacement, resulting in higher efficiencies;
- Pulse-free, meaning flows do not have surges and can be easily and accurately measured;
- Simplicity of Design, there are no check valves to clog or fail and no pulsation dampeners need to be placed in the line;
- Moderate Primability;
- Multiple Seal Arrangements or Magnetically Driven; and
- Low Cost
Q: What is dead head protection?
A dead head condition is an event when there is an unexpected blockage of discharge flow. This condition can lead to component failure and the critical failure of the pump. A simple way to avoid this condition is to install a relief valve. The relief valve should be installed as close to the pump outlet as possible and upstream of any restriction in the fluid path. The diverted fluid should be redirected back to the supply reservoir. Please feel free to contact one of our customer service representatives regarding any questions or concerns you may have.
Q: Can these pumps be run dry?
No, gear pumps should never be run dry for any length of time. The liquid being pumped through the gears acts as a lubricant for the pumping chamber, without lubrication critical damage to the pumping chamber can occur. If this condition occurs please contact one of our customer service representatives. If desired, please contact our application engineering department for suggestions and alternatives to eliminate this condition from your application.
Q: What is decoupling?
Decoupling is when the driven magnet and the driver magnet (installed on the shaft of the motor) become desynchronized causing the magnets to stop turning and results in the stopping of the gears from turning and the pump from operating. When this occurs disconnect the pump from its power source and re-apply the power, the pump should return to normal operation. If this condition persists or if the pump never returns to normal operation please contact one of our customer service representatives.
Q: What kind of filter is recommended?
To extend the life and efficiency of your B&D gear pump, B&D Pumps recommends the use of a filter. Fine particles and abrasives will cause wear in the close clearances of the pump and will reduce the pump's performance. B&D recommends using as fine a mesh filter as possible. While each application and fluid is different, a 200 Mesh (75 Micron) filter is suggested. The filter location is best on the inlet side of the pump. Please feel free to contact one of our customer service representatives regarding any questions or concerns you may have.
Q: What is your warranty policy?
B&D Pumps warrants to Buyer that products sold by it will upon shipment conform to the description on the face hereof and any written specifications expressly approved by B&D Pumps and be free from defects in title, material and workmanship. NO OTHER WARRANTY, WHETHER EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, SHALL EXIST IN CONNECTION WITH ANY PRODUCTS SOLD BY SELLER, AND ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY EXCLUDED.
Q: What is the Date Code?
The date code is listed on the label of all our pumps. This code represents the date and year that pump was made.
Q: How do I return goods under warranty?
Please complete our Return Goods Questionnaire and forward it to our Return Department via email at returns@bdpumps.com or by fax to (847) 669-2343. Please complete as much of the requested information as possible and include an MSDS sheet for the liquid that has been used with the pump. Once received a representative from our Return Department will contact you with shipping instructions.
B&D Form RGA-01 Return Goods Questionnaire - CLICK HERE
Q: How do I apply for open credit terms?
B&D Pumps' credit policy requires that payment be received on prepayment terms for all new customers. After processing your first order, B&D Pumps will gladly accept your application for credit terms. Please complete B&D Pumps Application for Credit and return it to our Credit Department at credit@bdpumps.com or (847) 669-2343. Once received and processed a representative will contact you.
B&D Credit Application - CLICK HERE
Q: What are B&D's standard terms and conditions of sale?
B&D Pumps Standard Terms and Conditions of Sale - CLICK HERE
Q: Does B&D accept credit cards as a form of payment?
Yes, B&D Pumps accepts Visa and MasterCard payments. Please DO NOT send any credit card information via email. Please fax your information, along with your order, to (847) 669-2343 or contact our customer service department.
Frequently Asked Questions