Where can I find the dimensions for Snaplock couplings?
You can find general dimensions for Snaplock products on the
Snaplock
page.
 back
to top
How can I check what materials are compatible with the media I am using?
There is a chemical compatibility guide in the technical resources section of our site.
back
to top
What certification is available?
Most products are sold with a Certificate of Conformity as standard. Material certificates and/or DIN 2.1.b certificates can also be supplied on request. DIN 3.1.b certificates can also be provided but this will affect price and delivery and must be requested at the enquiry stage and confirmed when ordering. You should
contact us for any special certification or product test requirements you have.
Certificates of conformity are also available upon request.
back
to top
What is the specification for Snaplock couplings?
Cam and groove couplings have traditionally been manufactured to the US Military specification MIL-C-27487. This specification covered the dimensions and machining tolerances, the materials, the closing torque, part numbers, pressure ratings, finish, inspection procedures and packing requirements of the product. Compliance to this specification ensured inter-changeability of parts from different manufacturers.
Only parts manufactured for Defence Ministry applications normally complied in full with MIL-C-27487 in respect of stamping of part numbers, inspection, packaging and anodising. Such products were ordered using the specific MS part numbers within MIL-C-27487. Parts supplied for commercial applications normally only complied with the material, dimensional and pressure parameters of the specification. It should also be noted that only some of the sizes and materials offered were covered by MIL-C-27487.
In recent years, many generic products have been produced which only loosely comply with the specification and where alternative materials, reduced wall thickness and less inspection are provided. This process helps to reduce the cost but it will also adversely affect the life of the product as well as its resistance to some media. In some cases, it can also endanger the operator and/or the environment.
The specification A-A-59326 has replaced MIL-C-27487, a cancellation notice being issued in 1998. The German DIN 2828 standard has been introduced in Europe and there is also a draft CEN standard for cam and groove couplings in existence. Products produced to DIN 2828 are interchangeable with those made to the original MIL-C-27487 but have differences in the hose tail design, thread, part number and other details.
Pro Flow Dynamics offers the following options:
- Snaplock metallic product from 3/4" to 4" in a range of basic configurations, designed to interchange with product manufactured to DIN 2828 or A-A-59326 (previously known as MIL-C-27487) Snaplock product as above but to DIN 2828.
For full details of the product types available, see the
Snaplock pages within this site.
back
to top
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.
back
to top
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.
back
to top
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.
back
to top
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.
back
to top
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 I to 2 drops of total cumulative leakage after a total of 10 connect/disconnect cycles. No other product comes close!
back
to top
Where can Dry Link be used?
Actually, the Dry Link hose coupling assembly 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.
back
to top
Can Dry Link be used on Intermediate Bulk Containers (IBCs)?
Absolutely. As a mater of fact, the unique Dry Link design provides better worker access to the bottom connection on an IBC than most other dry disconnects.
back
to top
The Dry Link technology is new. How much field experience has there been?
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.
back
to top
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 an 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, EPDM or Chemraz can be provided.
back
to top
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).
End connections: NPT, British Standard (BSP), Flanged, Butt-weld, and Triclover.
back
to top
What are the Pressure-Temperature ratings of Dry Link couplings?
Coupling ratings vary with size and seal materials. Please refer to the DryLink technical information page.
back
to top
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 under “Specialty Products” on the DryLink website.
back
to top
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 25 RA surface finish. We can even supply FDA or USP approved seals. Please see details under “Specialty Products” on the DryLink website.
back
to top
Can I see some typical applications of Dry Link couplings in the industry?
Certainly yes! Please visit our “Applications” link on the DryLink website.
back
to top
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.
back
to top
Does Dry Link provide technical support for their products?
The DryLink website can answer most of your questions. You can download Catalogs 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.
back
to top
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.
back
to top
What is permament mold casting?
The permanent mold casting process is the production of castings by pouring molten metal into permanent metal molds under gravity pressure. Castings produced in permanent molds have finer grain structure and better strength properties than those cast from similar alloys in sandcasting and diecasting. The castings have better dimensional uniformity and in addition, a smooth surface finish is achieved right out of the mold, therefore, eliminating some secondary polishing operations.
back
to top
What is investment casting?
The investment casting process begins with the production of a wax pattern with the exact geometry of the finished casting. This pattern is usually made by injecting liquid wax or plastic into a metal die cavity. The ceramic-shell mold-making process starts by dipping the entire wax cluster into a fine ceramic slurry and then coating it with a fine ceramic sand. After the initial coating dries sufficiently, the cluster is dipped into progressively coarser grades of ceramic material. When the shell is between 3/16" and 5/8" thick, it is placed in a heated environment that melts the wax pattern gates, runners, and sprue. The remaining ceramic shell contains dimensionally precise cavities of the casting shape desired.
back
to top
|
