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1.0  Description Safety Breakaway Coupling 
 
1.1 Area of use 

 
The Safety Breakaway Coupling (NTS-PU) can be used in loading arms, hose- and pipelines for the 
transfer of fluids or gas. A typical application is the unintended tank truck/railcar/aircraft pull-off or 
the drifting away of a barge or ship. 
 

1.2 Design 
 

Both halves of this emergency coupling are equipped with non returning, spring loaded valves; they 
are  held  together  by  a  fast  coupling  connection.  Separation  is  triggered  by  a  pulling  force  via  the 
hose or loading arm. 

The separation force is individually preset

 for max. protection of the hose 

line. 
 

1.3 Function 
 

In the mounted status the NTS-PU is open and allows for free flow. If a tensile force exceeds the 
preset value the two halves separate. The valves instantly close on both ends to prevent spillage. 
The separation does not result in the destruction of parts (shear pins); 

no spare parts

 or special 

tools are required to instantly reassemble it after depressurizing and draining the hose line. 
 

1.4 Advantages 
 

  Working in any direction (angle) 

  Built-in possible in both directions 

  Easy reassembly after separation 

  Mounting: tighten mounting screws, push 2 halves together and remove the  

 

mounting screws 

  Cable-free activation 

  Fully functional immediately after being built in; no further activation required 

  Spare-part-free, non-destructive separation 

  No shear pins involved and no destruction. 

  Easily reassembled w/o tools or spare parts 

  Ideal for LPG transfer lines 

 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for NTS-PU Series

Page 1: ...Page 1 OPW Emergency Safety Disconnector Safety Breakaway Coupling Type NTS PU Series Pull Away Sizes 1 4 DN25 DN100...

Page 2: ...use Page Content 2 1 0 Description of the NTS PU Safety Breakaway Coupling 3 2 0 Operator s manual NTS PU 5 3 0 How to install the coupler 6 4 0 Testing of the coupler after a separation 7 5 0 Reassem...

Page 3: ...status the NTS PU is open and allows for free flow If a tensile force exceeds the preset value the two halves separate The valves instantly close on both ends to prevent spillage The separation does...

Page 4: ...seal rings upon request 1 6 Specifications Sizes 1 4 DN25 DN100 Pressure rating 232psi PN16 Aluminium 360psi PN25 SS Connections BSP and NPT threads DIN ISO ASA TW and TTMA flanges Other treads and f...

Page 5: ...transport These parts have to be removed before the NTS PU goes into service as explained in the manual 2 2 Removal of packing material The NTS PU is packed in special wrapping material and boxed for...

Page 6: ...duction line 4 Mounting screws must be removed before the use of the NTS PU 5 During the separation small amounts of media could escape We therefore recommend an additional spray protection 6 The user...

Page 7: ...amage to the coupler Check seal rings for damage Check all release parts for damage Check face o rings where the two NTS PU halves mate for damage 4 2 Evaluation of the damage and consequences a Minor...

Page 8: ...ssembly of the NTS PU after a separation 1 Terminology of the most important coupler parts Inline Adapter Release Lever O Ring Threaded Hole for Mounting Screws Hole for Threaded Rod Threaded Hole for...

Page 9: ...e it 2 Depressurize and empty line page 7 point 4 1 line a 3 Optical inspection page 7 point 4 1 line b 4 Place the 6 x Mounting Screws into the threaded hole at the Adapter The Release Levers open to...

Page 10: ...5 Place the 2 x threaded rods by turning them clockwise 6 Place the Adapter on the top of the Inline and placing the 2 x washers and hex nuts of the threaded rods Threaded Rod Inline Adapter Washer H...

Page 11: ...then by carefully tightening the hex head nuts crosswise as far as they go until the two halves are fully flush 8 Replace the 6 x Mounting Screws out of the threaded hole at the Adapter body The Rele...

Page 12: ...Page 12 9 Remove the 2 x threaded rods including the washers and hex nuts 10 The Safety Breakaway Coupling is now complete and after the pressure test page 13 point 3 4 ready for use...

Page 13: ...ssure stepwise and check for leakage 6 4 Pressure testing of the mounted NTS PU Close the coupler on one side with a blind threaded end blind flange and fill with fluid in an upright position Apply th...

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