Dry Cryogenic Couplings

LNG BUNKERING

The Viking Grace, the worlds first large passenger ferry powered by LNG engines, is refuelled safely, quickly and easily with Mann Tek Dry Cryogenic Couplings, DCCouplings. 

Mann Tek has developed a new era of cryogenic couplings

Dry Cryogenic Couplings (DCCouplings) and Cryogenic Break-away Couplings
(CBCouplings) are designed for use wherever it’s beneficial to connect and
disconnect hoses and pipelines under pressure, quickly without spillage and
additional tools.
Dry Cryogenic Couplings and Cryogenic Break-away Couplings are designed
primarily for the use of cryogenic liquefied gases, e.g. LNG (-163ºC) and e.g.
Nitrogen (-196º), where safety and reliability are of highest concern.

The Dry Cryogenic Coupling consist of a
“tank” unit wich is a type of a non-return valve
and a “hose” unit with a valve driven by an
internal cam curve to open both valves at the
same time. Operation is a single action using
a straight forward turning motion to connect
the couplings and open flow path. An initial
push and turn action on the hose unit provides
engagement with the tank unit, thus locking
and sealing the two units together. Further
rotation opening the internal valves, thereby
allowing full flow with a minimum of pressure
drop.
A selectivity (code) system allows the system
to be used to a wide range of cryogenic liquefied gases without any risk of failure owing to
“human error”. 

Applications

• Container discharge
  • Fuel bunkering
  • Loading/unloading of tank trucks, rail tankers,
   bunkering and tank vessels
  • Vapor recovery lines

Advantages

• Easy to handle
 Push and turn - free flow.
 Turn and pull - closed.
• Safe
The valve cannot be opened until the
unit is coupled and closes automatically
when disconnecting.
• Environmentally friendly
 Accidental spillage eliminated.
• Reliability
 No loss or spillage of liquids at
 connection or disc

Technical information

Sizes
1" (DN25) to 6” (DN150)
Working pressure
MWP 25 Bar - 1" (DN25) to 4" (DN100)
MWP 16 Bar - 6" (DN150)
with 5 time safety factor
Working temperature
Lowest working temperature is -200o C
Materials
Stainless steel.
Connections
Female NPT, flanged EN and ANSI.
Others on request.

How it works - The DCCoupling function

The self sealing design of the couplings guarantees both the highest level of safety
and also the quickest way of connecting and disconnecting.

About Mann Tek 

Mann Teknik AB is a Swedish company
located in Mariestad, Sweden.
Mann Teknik AB designs, manufactures and
markets products for safe and environmentally
friendly handling of aggressive fluids for the
chemical and petrochemical industries.

The main product is the Dry Disconnect
Couplings, DDCouplings®, for spill free liquid
handling. The products are marketed through
independent representatives in more than 30
countries.

Company Approvals

Mann Teknik AB are certified to ISO9001:2008.
The products are CE-labeled. The main products
are certified to PED, the European Pressure
Equipment Directive and ATEX, the European
directive for Equipment intended for use in
Potentially Explosive Atmospheres.

The products are produced in accordance with
several important standards, e.g. the NATO
STANAG 3756