Claims
- 1. A valve apparatus for injecting a sample to be analyzed into a column of a gas chromatograph, said multiple valve apparatus comprising:
an upper plate comprising at least one cavity for injecting activation gas and at least one recess for an elastomeric material; a first diaphragm disposed below said upper plate; a center plate disposed below said first diaphragm, said center plate having at least one port for injection of said sample; a second diaphragm disposed below said center plate; and a bottom plate comprising at least one cavity for injecting activation gas and at least one recess for an elastomeric material.
- 2. The valve apparatus of claim 1 wherein the number of said ports of said center plate are six.
- 3. The valve apparatus of claim 1 wherein the number of said ports of said center plate are ten.
- 4. The valve apparatus of claim 1, wherein said first at least one recess is aligned with an O-ring.
- 5. The valve apparatus of claim 4, wherein said second at least one recess is aligned with an O-ring.
- 6. The valve apparatus of claim 5 wherein said O-ring is made of Viton®.
- 7. The valve apparatus of claim 1, wherein said first diaphragm is made of Teflon®.
- 8. The valve apparatus of claim 7, wherein said second diaphragm is made of Teflon®.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit under 35 U.S.C. § 119(e) of U.S. Provisional Application No. 60/385,488 entitled “Simplified GC Sample Valve,” filed on Jun. 4, 2002, which is herein incorporated by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60385488 |
Jun 2002 |
US |