- Products
- Company Profile
- About Company
- E-Mail Company
 | Products/Services: |  |
| Click on a category to see this company's product/service line for the chosen category. | ||
 |  |
| Valco Instruments Co. Inc. | Houston, TX | |
| * NOTE: Click on an image to enlarge it in a new window. | |||
.jpg) | Flanged fittings The fitting most commonly used with low pressure plastic valves is the Cheminert tube end fitting consisting of a polypropylene nut retained on the polymeric tube by a flange formed with a specially designed flanging tool. This is an excellent method for connecting plastic tubing, as there is no possible reduction of the inside diameter and no binding or twisting of the tubing when the fitting is tightened. These fittings are widely used in biological applications and flow injection systems, with a variety of adapters and connectors available to allow connection to virtually any system. | ||
.gif) | Stainless steel internal nuts The compression fitting, in which a ferrule is compressed onto the tube as a nut is tightened, offers reliability in high pressure situations and in connecting metal tubing. Most Valco fittings and valves are supplied with the appropriate quantity of nuts and ferrules. | ||
.gif) | High pressure PEEK internal nuts The compression fitting, in which a ferrule is compressed onto the tube as a nut is tightened, offers reliability in high pressure situations and in connecting metal tubing. Most Valco and Cheminert fittings and valves are supplied with the appropriate quantity of nuts and ferrules. | ||
.jpg) | Nanovolume® column end fittings New Cheminert nanovolume column end fittings include our new one-piece 1/32" fingertight fittings, with a patented* collapsible ferrule that makes fingertight nanovolume connections a snap. These fittings work with a variety of tubing, including PEEK, fused silica, and 1/32" electroformed nickel. Column end fittings include two liners to adapt the 1/32" fitting to fused silica. The longer liner, used with the internal nut, has a 1 µm screen embedded in the PEEK to provide closure for fused silica columns. The short liner is used with the external nut. | ||
.gif) | Nanovolume® connectors for high resolution capillary HPLC Cheminert nanovolume connectors include our new one-piece 1/32" fingertight fittings, with a patented* collapsible ferrule that makes fingertight nanovolume connections a snap. These fittings work with a variety of tubing, including PEEK, fused silica, and 1/32" electroformed nickel tubing (standard or gold-plated ID). Liners adapt the fittings for use with fused silica. To avoid potential confusion, all fittings utilizing the Cheminert collapsible ferrule are made of black PEEK; fittings with a standard Valco ZDV fitting detail are natural PEEK. | ||
.gif) | Column-to-valve connector (Internal to external reducer/adapters) Internal fittings provide the smallest possible fitting volume. But there are situations, such as when you’re using graphite ferrules which tend to become lodged in internal details, when an external fitting might be more desirable. A typical situation of that nature is the connection of a fused silica capillary to a valve. Our unique design permits the 1/32" nut to be tightened without affecting the 1/16" connection. | ||
.gif) | PEEK caps Use a cap to close off a tube with a ferrule and internal nut already made up. A cap is essentially a piece of hex stock with a zero volume fitting detail machined into it, but with no through-hole. PEEK caps are available in knurled fingertight and hex wrench-tight hex nut designs. Fingertight nuts have a knurled surface designed to provide sufficient sealing force on the ferrule without wrenches. Hex style nuts allow wrench tightening; however, since they are polymeric, they can break and are recommended for use only when space is limited and fingers won’t fit. PEEK caps include a PEEK nut and ferrule. Sizes available: 1/32”, 1/16”, 1/8” | ||
.gif) | PEEK caps Use a cap to close off a tube with a ferrule and internal nut already made up. A cap is essentially a piece of hex stock with a zero volume fitting detail machined into it, but with no through-hole. PEEK caps are available in knurled fingertight and hex wrench-tight hex nut designs. Fingertight nuts have a knurled surface designed to provide sufficient sealing force on the ferrule without wrenches. Hex style nuts allow wrench tightening; however, since they are polymeric, they can break and are recommended for use only when space is limited and fingers won’t fit. PEEK caps include a PEEK nut and ferrule. Sizes available: 1/32”, 1/16”, 1/8” | ||
.gif) | Column end fittings Although our column end fittings look like ordinary reducing unions, they are machined with a conical recess to match a specific column ID so that there are no abrupt or irregular diameter changes which can cause loss of theoretical plates. This optimization results in an assortment of column end fittings for each column OD - for Nanovolume™, microbore, analytical, semi-prep, and preparative. To receive full benefit of this design, use column end fittings only with the specific column ID for which they are intended. We can design special fittings for unusual sizes or OEM use. | ||
.gif) | Stainless steel caps Use a cap to close off a tube with a ferrule and internal nut already made up. A cap is essentially a piece of hex stock with a zero volume fitting detail machined into it, but with no through-hole. Standard material is 300 series stainless. Sizes available: 1/32”, 1/16”, 1/8”, 1/4” | ||
.jpg) | 360 Micron Fittings for direct connection of 360 µm tubing New
Our new high pressure fitting design permits direct connection of 360 micron OD fused silica, PEEK, stainless, or electroformed nickel tubing without the use of liners. Because of the compact size and fine 2-56 threads, a leak-free connection that seals at pressures in excess of 20,000 psi can be easily formed with the available manual tool. The 360 µm fittings are available with a PEEK or stainless nut; the PEEK nut is supplied with a glass-filled PEEK ferrule, while the stainless nut uses a 316 SS ferrule. The ferrule snaps into the nut so that the fitting is "one-piece," but the ferrule doesn't rotate and twist the tube as the nut is tightened. | ||
.gif) | One-piece PEEK fingertight fittings – color-coded for 1/16" tubing These molded fingertight fittings are rated to 5000 psi (350 bar), so they can be used in virtually any HPLC fitting detail with 10-32 threads. Six colors allow easy identification of tubing lines. | ||
.gif){kind=small} | One-piece PEEK fingertight fittings – Narrow hex head for 1/16" tubing This natural PEEK machined fitting has a narrow hex head and 10-32 threads. | ||
.jpg) | Color-It fingertight adapters Use Color-It snap-on extensions to color-code 1/4" hex-head nuts, and turn the nut into a fingertight fitting at the same time. Color-It adapters are available in six different colors, and can be used with PEEK and stainless hex-head nuts. | ||
.jpg) | Fill ports for polymeric Cheminert nanovolume™ valves These fill ports provide direct syringe connections to Model CN2 and CN4 nanovolume™ valves. The one-piece fingertight fitting includes the patented* collapsible ferrule that makes connections a snap. To avoid potential confusion, all fittings utilizing the Cheminert collapsible ferrule are made of black PEEK. Size available: 1/32" | ||
.gif) | Compression fittings The two piece compression fitting, in which a ferrule is compressed onto the tube as a nut is tightened, offers reliability in high pressure situations and in connecting metal tubing. One piece compression fittings (nut and ferrule combined) are generally not as effective, since the sealing surface rotates as the tightening force is applied. There are many manufacturers of fittings based on the compression concept: indeed, there is an incredible selection of connectors, adapters, and accessories available. Our thirty years of designing and manufacturing fittings specifically for chromatography have convinced us that our fittings are the best in the world. | ||
Request Quote | |
 |
