Frequently Asked Questions
 
■ What exactly is a dry-disconnect coupling?

A dry-disconnect coupling (also called dry-break coupling) is a hose connection device which provides an automatic mechanism to seal off both the hose and the fixed pipe end when the hose is disconnected.
 
■ Where are dry-disconnect couplings used?

Dry-disconnect couplings are used in any fluid transfer application where loss of fluid upon disconnection cannot be tolerated because of environmental regulations, worker safety considerations, the high value of the fluid, or where cleanliness is a concern.
 
■ What is the Dry Link® hose coupling assembly?

The Dry Link brand hose coupling assembly was invented and patented by us to provide a new and improved alternative to the older designs of other dry disconnect devices. It uses a unique new technology which makes the plunger and spring devices of the last 20 years obsolete. We are a recipient of the 1993 Product of the Year, Gold award from Plant Engineering magazine.
 
■ What makes Dry Link unique?

Almost everything about Dry Link is unique. The flow shut-off mechanism resembles a butterfly valve which results in a very low flow restriction. This design enhances flow while also reducing the risk of internal gunk-ups which can lead to connection malfunctions. A foolproof safety interlock prevents accidental opening, and a clever high-tech sealing arrangement results in the world’s most drip-free dry disconnect.
 
■ Just how drip-free is Dry Link?

Independent, third party testing by Factory Mutual Research has verified that the 2” (DN 50) size Dry Link hose coupling assembly had only 1 to 2 drops of total cumulative leakage after a total of 10 connect/disconnect cycles. No other product comes close!
 
■ Where can Dry Link be used?

Dry Link hose coupling assemblies can be used anywhere there is a hose being used to transfer fluid, especially where the fluids are hazardous, toxic, corrosive or flammable. This, of course, includes bulk fluid transfer applications such as loading and unloading of tank trucks, railroad cars and portable tank containers. It also includes in-plant switching manifolds and moving equipment such as portable batch reactor vessels.
 
■ Can Dry Link be used on Intermediate Bulk Containers (IBCs)?

Absolutely. In fact, the unique Dry Link design provides better worker access to the bottom connection on an IBC than most other dry disconnects.
 
■ How long has Dry Link technology been around? How much field experience is there?

The first Dry Link units were installed in September 1992, on a solvent switching manifold for a large midwest pharmaceutical company. This system is still working fine. Since then, several thousand Dry Link units have been put into service throughout the world.
 
■ What materials are used in the construction of Dry Link components?

All wetted parts are Type 316 stainless steel. Dry Link can also be constructed with Alloy 20 (Carpenter 20), or Hastelloy C wetted parts for services where severe corrosives are a concern. All internal seals are spring-energized PTFE; however, molded Viton (FKM), EPDM or Chemraz/Kalrez (FFKM) seals can be provided.
 
■ What are the Dry Link Coupling sizes and end connections?

Couplings are offered in sizes 1”, 1.5”, 2”, 3” and 4” (DN 25, 40, 50, 75, and 100).
We also offer custom ½" and ¾" sizes.

End connections: FNPT, British Standard (BSPP), Flanged, Butt-weld, and Triclover.
 
■ What are the Pressure-Temperature ratings of Dry Link couplings?

Coupling ratings vary with size and seal materials. Please refer to our Catalog or click here.
 
■ What are “keyed” couplings?

Dry Link “keyed” couplings are used in batch process plants and manifolds for preventing accidental cross-contamination of chemicals. Please see details in our Catalog or click here.
 
■ Does Dry Link make sanitary couplings for the pharmaceutical and food markets?

Absolutely. Typically, these sanitary couplings have Triclover end connections and are hand polished with an internal 20 RA micro-inch (0.50 RA micron) surface finish. We can even supply FDA or USP approved seals. Please see details in our Catalog or click here.
 
■ Can I see some typical applications of Dry Link couplings in the industry?

Yes. Please visit our “Applications” link on our website. We have tons of information on our website!
 
■ Can I view a video demonstration of a Dry Link coupling?

You can watch a video demo of our coupling right on your PC by clicking here. Or, you may request a CD from us from our contact page found here.
 
■ Can I find some guidance for selection of materials on your website?

Our website provides links to third party websites to check material compatibility for your line medium. However, Dry Link does not take responsibility for the accuracy of information contained on the third part websites. Please visit the “Applications” link on our website and click on “GUIDE”.
 
■ Does Dry Link provide technical support for their products?

Our comprehensive website can answer most of your questions. You can download our Catalog and Maintenance Manuals. You can even download and watch videos on your PC illustrating operation and maintenance of couplings. If you have further questions, please contact us. Our friendly staff is always there to help you.
 
■ How can I order Dry Link couplings?

It is very important that you specify the correct coupling for your application. Please select the desired coupling features by clicking here.