UNLOADERS, INJECTORS, VALVES & GUAGES Regulator / Unloader - ST-280 ! 8 GPM ! 3600 PSI ! 175°F ! 27.5 oz weight Part No 8.712-674.0 8.701-655.0 8.701-654.0 8.701-653.0 Old No 462680 088536 088535 088534 ! Brass housing — stainless-steel valve ! 3/8" FPT inlet/outlet ! 1/4" FPT bypass Description ST-280 Seat Repair Kit “D” Piston Seal Kit “C” Poppet Repair Kit Unloaders - Pressure-Actuated 13 GPM ! 13 GPM ! 800-3000 PSI ! 160°F ! Bellville spring washers minimize spikes ! Forged-brass bodies / stainless ball and seat ! Four 1/4" side ports enhance versatility ! 1/2" FPT inlet, outlet and bypass ports ! 57.3 oz weight Part No Unloaders - AR Bolt-On Mini-Matic Models. ! Fits XT and XM series pumps ! 2600 PSI-rated pressure ! 1-2" F inlet ! 3/8" M outlet Part No 8.712-582.0 8.712-564.0 8.712-573.0 8.712-576.0 8.712-575.0 8.720-676.0 Old No 462228 462243 462246 462245 AR002812 AR Model No. GPM AR20608 AR20821 AR20890 AR21039 AR21040 Seal Kit Bypass 3-5.5 2-5 2-3 2-3 3-4 AL, No injector AL, No injector AL, Adj injector Brass, Adj injector Brass, Adj injector NOTE: AR has discontinued the Combiset unloaders. Use Mini-Mate unloaders as replacements. For 22mm twist coupler outlet models, add Part No8.709-546.0 (3/8" x 22mm) to injector outlet. 8.712-709.0 8.712-710.0 8.712-711.0 8.712-708.0 8.722-137.0 Old No 462934 462935 462937 462933 G012099 Model No. 22910 22911 22912 22913 Repair Kit PSI 800 1400 2400 3000 Spring Silver Yellow Red Orange Unloaders - Pressure-Actuated ! Unloads pressure in entire system when in bypass ! Forged-bronze body ! Stainless-steel seat ! 3/8" FPT inlet/ 3/8" FPT outlet ! 1/4" FPT bypass ! 160°F 8.712-705.0 Part No Unloaders - Gymatic ! RK and XM series pumps ! 3650 PSI-rated pressure ! 3-5.5 GPM ! 3/8" M outlet Part No 8.712-565.0 8.712-563.0 8.712-574.0 8.712-567.0 8.712-568.0 8.712-569.0 8.720-642.0 Old No 462229 462226 462244 462233 462235 462236 AR002611 ! Max PSI: 4000 ! Max GPM: 5 Part No 8.712-583.0 Old No 462255 ! Max PSI: 4000 ! Max GPM: 5 Part No 8.720-903.0 Old No AR20992 AR Model No. Inlet AR20242 AR20242G AR20081 AR20082 AR20399 AR20400 ! Inlet: 1/2" M ! Outlet: 3/8" M NPT AR Model No. AR21669 ! Inlet: 1/2" F ! Outlet: 3/8" M AR Model No. AR20992G Page 122 ! Bypass: brass 8.712-705.0 8.712-706.0 Old No 462927 462928 Model No. 22760APM 22765APM GPM 8 5 PSI 3000 4000 8.712-706.0 Unloaders - Flow-Actuated 1/2" F w/ no injector 3/4" (GHF) w/ no injector 1/2" M fixed injector #1 (2-3 gal) 1/2" M fixed injector #2 1/2" M adj injector #1 (2-3 gal) 1/2" M adj injector #2 Repair Kit ! Bypass: brass !Without injector ! Unloads pressure in entire system when in bypass ! Forged-bronze body ! Stainless-steel seat ! 3/8" FPT inlet/ 3/8" MPT outlet ! 1/2" bypass ! 160°F Part No 8.712-698.0 8.712-701.0 8.712-702.0 8.712-703.0 8.722-204.0 Old No 462909 462913 462914 462915 G022666 Model No. 22650 22654 22655 22656 Seal Kit GPM 3.0–4.5 3.5–4.8 4.5–5.5 4.5–6.5 PSI 0-3000 3000-4000 0-3000 0-3000
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