Parker Watts R119 High-Flow Air Pressure Regulator, 1/4 in to 2-1/2 in, 0 to 125 PSI
The Parker Watts R119 is the high flow regulator you put on a main line rather than at a tool. It holds a set downstream pressure while passing far more air than a general purpose FRL regulator, which is what you want when the whole shop, a blast pot or a paint line is running off one setting.
Output range is 0 to 125 PSI on every size. Supplied without a gauge, so order the gauge separately if you need one on the regulator itself.
Sizes and flow
- S1113: R119-02C, 1/4 in, 100 CFM
- S1109: R119-03C, 3/8 in, 110 CFM
- S1095: R119-04C, 1/2 in, 150 CFM
- S1121: R119-06C, 3/4 in, 300 CFM
- S1108: R119-08C, 1 in, 400 CFM
- S1127: R119-12C, 1-1/2 in, 500 CFM
- S1131: R119-16J, 2 in, 1800 CFM
- S1101: R119-20J, 2-1/2 in, 1800 CFM
Read this before ordering the 2 in or 2-1/2 in
The 2 in and 2-1/2 in regulators are pilot operated. They do not set their own pressure from the adjusting knob the way the smaller ones do. You have to run a 1/4 in regulator as the pilot alongside them, and the pilot is what you actually adjust. If you order one of these two sizes without a pilot regulator you will not be able to set it.
Sizing it
Size on flow, not on the pipe you are screwing it into. A regulator that is too small for the flow will droop badly: the pressure you set at no flow collapses as soon as the demand comes on, and it reads as a compressor problem when it is not. Work out the peak CFM the line actually has to pass, including everything that can run at once, and pick the size above it.
The reverse mistake is oversizing by a lot on a low flow line, which costs money and makes the regulator less stable at the bottom of its range.
Fitting it
Install it the right way round; flow direction is marked on the body. Put it downstream of filtration, because dirt on a regulator seat is what causes creep, where the set pressure climbs on its own overnight. Leave room above the knob to get a hand in, and support the larger bodies rather than hanging them off the pipe threads.
Related parts
We also stock the Parker Watts 07E series filter regulator in 1/2 and 3/4 in, L606 air line lubricators from 1/4 in to 1-1/2 in, and Watts replacement elements.
Not sure which one
Tell us the line size and the peak CFM the line has to carry, and the Warthog Air Compressor Store team will confirm the right regulator before you order.
Parker Watts R119 high flow air pressure regulators in 1/4, 3/8, 1/2, 3/4, 1, 1-1/2, 2 and 2-1/2 in, 100 to 1800 CFM, 0 to 125 PSI outlet range, without gauge.
NOTE: Actual product may be different from pictured!
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