DSP coupling explained

A DSP coupling is a self-sealing symmetrical coupling which is secured by inter-connecting two couplings together.

It is closed by turning the locking ring on the triangular part of the opposed DSP coupling.

Extra closure can be applied by locking the connection with couplings wrench.

The DSP coupling locking principle is similar to that of the guillemin coupling.However, there are differences to the preformed serration on the locking ring and the design of the lugs.

The locking ring of DSP couplings can be turned up to 45°.

DSP coupling are used as fire-fighting couplings.^{[1] [2]} They are typical in for e.g. France^[3] and Belgium.

DSP couplings are symmetrical.^[4]

DSP comes in different sizes. (e.g. DN40 DN65 DN100).

Typical materials for the coupling are aluminum, brass and bronze.^[5]

For the Origin or meaning of "DSP" there is only speculation.^[6]

See also

• Hose coupling#DSP

Notes and References

1. Web site: DSP fire-fighting couplings - Pathel Industrie . https://web.archive.org/web/20210225191319/https://www.pathel.com/en/products/couplings-and-fittings/dsp-fire-fighting-couplings/ . 2021-02-25 . www.pathel.com.
2. Web site: DSP couplings. lmc-couplings.com.
3. Web site: Coupling to French Standard DSP/AR | Ohrdrufer SchlauchWeberei Eschbach. en.osw-eschbach.de.
4. Web site: The Difference Between Guillemin couplings and DSP couplings. www.fire-coupling.com.
5. Web site: Coupling DSP AR | Véhicules de secours et de lutte contre l'incendie - Sides. March 14, 2017. www.sides.fr.
6. [:fr:Raccord sym%C3%A9trique Guillemin]