Quick Release Couplings
Quick Release Couplings

Quick Release Couplings: M.I.L. Standard

  • Robust, reliable and simple to install
  • Manufactured in Brass, Plastic and Stainless Steel
  • Sizes ranging from ¼" to 3" diameter
  • Interchangeable with: Hanson HK Series, Snaptite 72, Parker 60, Rectus 70KB and Aeroquip AD45
  • Special seals including PTFE Viton Encapsulated PTFE Energised available on request

Eldon couplings are fitted with Viton Shore 75 seals as standard giving the coupling a temperature range of -20°C to +200°C.

Customers requiring other high grade Elastomeric or PTFE seals fitted should contact their suppliers.

Couplings are produced with BSPP threads as standard.

NPT threads can be supplied on request.

All dimensions are only intended to used as a guide.

Exact dimensions are available from our sales team.

Maximum recommended working pressure (BARS)
Sizes(inches)BrassStainless Steel
 WorkingBurstWorkingBurst
¼32013005002100
¾30012004001800
½30012004001800
¾2407503501800
1170500200835
1 ¼170500200835
1 ½170500200835
2122470175700

Contact our sales team if pressure ratings are above the figure stated. Working pressure is based on M.I.L-c-25427 which allows pressure peaks 50976 above working pressure.

Calculating Pressure Drop

Pressure drop can be calculated using the following formula: Pressure Drop = (Litres/M in) ² (CV x 3.8) On connection/disconnection a small air inclusion/spillage occurs. Shown are the figures for the ¼ » - 1 » NB Coupling. Further information for larger couplings can be obtained from our sales team.
Size (inches)SpillageAir Inclusion
1/40.53cc0.072in³
3/81.20cc017in³
1/22.47cc0.22in³
3/48.66cc0.72in³
115.5cc1.05in³

CV (Valve Co-efficients)

Eldon Couplings are interchangeable with Hanson HK Series, Snaptite 72, Parker 60, Rectus 70KB and Aeroquip AD45 couplings.

CV (Valve Co-efficients)
1/43/81/23/411 1/41 1/22
1.121.913.188.1711.4225.3135.1049.98
Coupling Chart
Dimensions
Size (inches)ABCDEF
1/41 1/415/161 1/81 7/167/16¾
3/82 5/811 7/161 5/8 1/27/8
1/231 ½1 3/41 15/1611/161 1/8
¾3 3/41 9/162 1/42 3/83/41 3/8
14 1/41 7/82 9/162 1/215/161 5/8
1 1/44 3/433 1/44 3/42 11/163
1 1/24 3/433 1/44 3/42 11/163
25 9/1644 1/85 1/22 7/84