SVC 7-2
INTRODUCTION
The valves described in this manual are manufactured by VALCO Instruments Co, Houston, Texas. As
members of the W-series product line, they are known as ”minivalves.” The valve body is made ofNitron-
ic-60 with 1/16 inch fittings. The W-series valves are also known asthe 18900F series. Thesevalves have
better leakage resistance and a longer life expectancy. An installed valve system is an integrated part of the
HP 5890 SeriesII Gas Chromatograph. Proper instrument operation will prolong the life ofthe valve system.
Read all the accompanying information and avoid the following operational abuses:
1) Exceeding the specified temperature and pressure ranges.
2) Plugging a valve with column packing or sample precipitation.
3) Scoring of valve surfaces with column packing or particulates in liquid or gas sample.
4) Contaminating the system with samples (noneluting materials) or poor quality support
gases.
VALCO VALVES 18900F
Basically, valves are composed of four assemblies a driver,valve body, rotor, and preload assembly.
P
Right
Stop
Left Stop
Port 4
Port 1
Rotor-Type
Ident Letter
Port 5
Port 6
MountingHole
Port 2
Port 3
MountingHole
Thevalve bodyis madeof Nitronic-60. Thisis ahigh chromium,highnickelcontent stainlesssteel,thathas
excellent chemical resistance, anti galling characteristics, and high tensile strength. External tubing
(plumbing) is connected to the valve body ports by the use of provided ferrules and fittings.
All general purpose valve bodies include mechanical stops in theirindex lips. Thestops are predetermined
to limit rotor rotation (i.e., 90 Degrees, 60 Degrees, and 36 Degrees), so the correct flow path results when
the index pin is close to or against either stop of the index lip.
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
To Next Page
Loading...
Need help?
General
