Manufacturers of analytical instrumentation often use syringe pumps for many low-volume fluid dispensing applications. But, are syringe pumps the best choice? We say a resounding “NO.” We believe valveless pumps win for a variety of good reasons. Here’s a brief overview of our reasoning:
- Possible double-trouble with syringe pumps. Yes, syringe pumps have proven to be accurate at very low dispense volumes, and they can provide a pulseless fluid stream at low-flow rates. However, syringe pumps fill and dispense through the same orifice, and as a result, uninterrupted flow requires at least two complete syringe assemblies. (While one syringe is dispensing, the other is filling…) Increasing components, especially those in contact with the fluid, raises the amount of routine maintenance required, and also increases the possibility of component failure.
- Less operational expenses with valveless pumps. Syringe pumps are more expensive than valveless pumps to operate. Requiring at least two syringes for a single continuous-dispense operation (as outlined above) doubles the cost of the system. With syringe pumps, more components are required (syringes, valves, drivers, & driver boards) – and this brings us back to the “double-trouble component failure possibility” mentioned above! However, on the other hand, valveless metering pumps, with simple 2-port configuration and only one moving part (a ceramic piston), cost less to operate and require minimal maintenance.
- Millions of trouble-free cycles with valveless pumps. Miniature valveless metering pumps and dispensers are often used to replace syringe systems, reducing maintenance and costs, and providing reliability for the long haul. There are no valves to leak or clog, so you get increased throughput for reliable dispensing for millions of trouble-free cycles.
What do you think—do you agree that valveless pumps are more efficient and cost-effective than syringe pumps?