Manual Switching Valves
Model 7725 Injector |
||||||||
 |
The Model 7725 and 7725i are Analytical Sales’ most advanced sample injectors for analytical HPLC. They can inject from 1µL to 5mL with high accuracy and precision. These versatile injectors can use either of two methods for loading the sample loop. The partial - filling method uses the syringe to measure the sample volume. It lets you vary volume easily without having to change the loop, and it does not waste any sample. Any amount up to half the loop volume can be loaded. The amount injected into the column is the exact volume dispensed from the syringe. Precision is about 1%. The complete - filling method uses the loop to measure the volume. It lets you load the loop without having to read syringe calibrations carefully. Excess sample is required to completely flush mobile stage from the loop. The amount injected is the volume of the loop. Precision is typically 0.1%. Eleven interchangeable loops ranging from 2µL to 5mL are available. Flow switching occurs at a flat interface between a polymeric rotor seal and a ceramic stator face. This combination provides long seal life. In a clean system the 7725 typically can make. These injectors are set for 5000 psi (345 bar, 34MPa) and are adjustable to 7000 psi (435 bar, 48mpa). Maximum temperature is 80°C. A 20µL loop is attached. |
|||||||
|
||||||||
]
 |
Model 9725 Inert Injector (PEEK™) | |||||||||
The operating pH range is 0 to 14. The injector is set for its maximum pressure capability, 5000 psi (345 bar, 34 Mpa). However, useable pressure may be lower, since it is usually limited by the burst pressure of the PEEK™ sample loop. Maximum temperature is 50°C. A 20µL loop is attached. Accessory loops from 5µL to 5mL are below; syringes are on page 3~13 & 3~14. |
||||||||||
|
||||||||||
 |
|
||||||||||||||||||||||||
 |
Model 3725 PEEK™ and 3725-038 Stainless Steel Preparative Injectors These Two injectors are for preparative HPLC with columns from 1 to 10 cm diameter. They have the ease of use and versatility of Analytical Sales’ analytical-scale models, plus the suitability for large sample volumes and high flow rates. Connections are for 1/8-inch O.D. tubing; a port adapter (optional accessory) connects 1/16-inch O.D. tubing. You can inject volumes from 100µL to 20mL. A 10mL loop is supplied; available accessory loops are 2-, 5-, and 20-mL. 1-mm diameter passages allow flow rates from 10 to 800 mL/min. Loading is rapid and without strain because the large diameters of the loop, valve passages, and syringe needle have a low resistance to flow. Both models have a version with built-in position switch. All models are shipped with fittings for all ports. Rheflex® PEEK™ fittings must be used with the PEEK™ model. PEEK™ models are set for 3000 psi (207 bar, 21MPa), adjustable to 4000 psi. Stainless steel models are set for 4000 psi, adjustable to 5000 psi. Maximum temperature for all models is 50°C. Accessory loops, syringes, and replacement parts can also be found on the list to the right. |
||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||
 |
Model 7000 & 9010 Two-Position Column Switching Valves |
|||||||||||
|
||||||||||||
|
||||||||||||
 |
Model 3030, 7030 & 9030 Switching Valve, 3-Way |
|||||||||||
| Model 3030, 7030 & 9030
Switching Valve, 3-Way The Models 7030 (stainless), and 9030 (PEEK™) are six-port two-position valves with a double three-way switching pattern. You can use them for selecting between two columns. The ends of the off-line column are sealed in a way that is different from the Model 7000 valve. Maximum pressure rating of 7,000. |
||||||||||||
|
||||||||||||
 |
Model 7040 Switching Valve, 4-Way |
|||||||
The 7040 with the external loop exchanges the flow pattern from ports (2-3 and 4-6) to (2-6 and 4-3). This flow pattern facilitates applications such as alternating column regeneration and column backflushing. Maximum pressure rating of 7,000. |
||||||||
|
||||||||
 |
Model 7060, 9060 Six Position Switching Valve This Six-Position Switching Valve makes HPLC analyses easier and faster and are available in either Stainless Steel or PEEK™. Two manually operated, six-position valves allow convenient selection among six columns for different analytical methods on the same chromatograph. There are several advantages achieved from using the valves instead of manually changing the columns: there is immediate selection, there is no wear on the fittings from repeated tightening, and the valve seals both ends of the off-line columns and keeps them on stand-by for future, immediate use. For manual column selection, the center port of one valve connects to an injector. Turning the valve handle directs flow into one of up to six columns connected to the valve’s six peripheral ports. A second six-position valve connects to the column outlets to select the operating column effluent and to direct it to the detector. The sixth port may be used for a bypass/flush-out tube. This connection permits rapid mobile phase changeover without exposing any column to a mobile phase other than the one with which it is routinely used.
|
Contact us today
for more information:
info@analytical-sales.com
Analytical Sales and Services
230 West Parkway • Unit One
Pompton Plains, NJ 07444
Tel:
973.616.0700
Fax:
973.616.0133
E-Mail: info@analytical-sales.com