Parker Quick Connects (aka Pioneer) has a several different series of couplers, including connect under pressure versions. I have all the couplings on the tractor and the ISO 5675 universal nipples on the implements. You have the option of NPTF or ORB for the connections to valves or hoses. Red fingernail polish is used to identify which hose to connect to which coupler, after the red tie-wraps fell off from too much sun.
4000 series couplers use manual retraction to make the connection with the nipple.
4200 series couplers use push / pull / breakaway clamps to make the connection
5000 series couplers connect under pressure, and then use a threaded mechanism, that you wrench together open the valves in each half (less convenient)
8200 series couplers push / pull / breakaway clamp can be connected under pressure where "either or both the coupler and nipple are under pressure. Valve halves remain closed, opening only when the system pressure has been relieved on the female body and then reapplied".
8400 series couplers are found in the Pioneer catalog. very similar to 8200, with a push to connect / breakaway design, supposedly more resistant to dirt, due to the mechnism being internal.
The
8100 series nipples also have a connect under pressure version, that allows you to use the less expensive 4000 and 4200 series couplers.
You can download either the
Catalog 3900 Pioneer Quick Coupling Products, April 2017, ~ 9MB, or the
Parker Catalog 3800, Section B, Hydraulic Quick Couplings, ~7MB, or the
entire Parker Catalog 3800 Quick Coupling Products, Sept 2016, 20MB.
I opted for the 8200 series couplers for my third function lines to my V-snowplow. You could mount them with the Parker 5001-4 (single) or 5006-4 (double ) break away clamps shown in the Pioneer 3900 catalog. However I opted to use weld-on
heavy duty Beta Clamps to clamp around the hose fittings rather than the coupler slide. ~$4 each