ADVANCES IN GC VALVES continued
2U500
Static charges can have a dramatic effect on the outcome of your Analytical balance giving you inaccurate readings. This problem can be eliminated with the NRD 2U500 microbalance ionizer. This
proprietary static eliminating device utilizes proven Alpha Ionizing Technology. The 2U500 can be easily mounted within the balance chamber using the Model BF3 E-Z Mount cartridge holder, assuring quick and accurate measurements.
Call 800-525-8076 to find out more or visit
www.nrdstaticcontrol.com. Figure 2 – Rotary valve with integrated purge. NRD, LLC
2937 Alt Boulevard, Grand Island, NY14072 P: 716-773-7634 F: 716-773-7744 E-MAIL:
sales@nrdinc.com
user select the right surface treatment to meet specific chemical compatibility and temperature requirements.
Another advance that reduces wear is a rotary valve with double/symmetrical end stops (see Figure 1). This improved design reduces the ra- dial force imposed on the rotor by the actuator,
AMERICAN LABORATORY • 12 • SEPTEMBER 2014
eliminating uneven or one-sided wear for im- proved repeatability and longer life.
The biggest advance in GC valve technol- ogy is a design breakthrough that integrates purge capability directly on the valve rotor (see Figure 2). Purging is the most effective way to eliminate leaks and sample loss and
Figure 1 – Rotary valve design with double/symmetrical end stops reduces uneven rotor wear.
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