www.eclarkassociates.com TECHNICAL BULLETIN Takasago Zero Internai 1 Prevents Cross-Contamination, Reduces Sample And Reagent Volumes TYPICAL APPLICATIONS The internai volume is the space between the isolation diaphragm and the valve body. When the valve closes, this volume is trapped, often reducing the sensitivity of the instrument. In a conventional valve seat design, the protruding valve seat is hard and prevents the Teflon diaphragm from flattening against the valve body. In the zero internal volume system, a special soft inert elastomer (perfluoroelastomer) is used for the valve seat. When the valve closes the soft protrusion presses flat, eliminating the internal volume. Typical Takasago Teflon Valve FEATURES CROSS- CONTAMINATION PREVENTION FASTER FLUSHING PERFECT EJECTION OF AIR BUBBLES REDUCE USE OF SAMPLE AND REAGENTS The zero internal volume option is available for 2-way valve model types STV and MTV. Typical Pumping Volume ul Model Port On Off MTV- 3 way Comm. -0.64 -0.34 N.C. -0.64 +2.01 N.O. 0.00 -0.034 EXAKN- 3 way Comm. +0.015 -0.015 N.C. +0.007 0.000 N.O. 0.000 0.000 Clark Solutions ͕ 10 Brent Drive Hudson, MA 01749 Օ Tel. 978 / 568 3400 Fax 978 / 568 0060