Page 121 - Suttner Product Catalog - 2025-2026

UNLOADERS

ST-261I UNLOADER VALVES
(With chemical injector and pressure compensating)

Built-in exclusive down stream (venturi-type) injector with
built in orifice provides more precise siphon rate
ORDER # PRESSURE INJECTOR FLOW RATE ORIFICE TEMP.
200261560 500 - 3625 PSI 1.50-2.25 GPM 1.8 mm 176° F
200261570 500 - 3625 PSI 2.25-3.35 GPM 2.1 mm 176° F
200261580 500 - 3625 PSI 3.35-5.00 GPM 2.4 mm 176° F
BYPASS FLOW RATE INLET OUTLET WEIGHT
1/4" FPT 8 GPM 3/8" FPT 3/8" FPT 1.40 lb
Repair Kits: Valve #200261526
Bypass #200261528
Injector #200060720

• Convenient downstream built-in chemical injector.

ST-261S UNLOADER VALVE

(With micro-switch and pressure compensating)

ORDER # PRESSURE TEMP. FLOW RATE INLET
200261550 500 - 3625 PSI 176° F 8 GPM 3/8" FPT
OUTLET BYPASS WEIGHT BOX QTY
3/8" FPT 1/4" FPT 1.82 lb 25
Repair Kits: Valve #200261526
Bypass #200261528
Switch Kit #200261527
• Normally open in bypass.

ST-261SI UNLOADER VALVES

(With micro-switch & chemical injector and pressure compensating)
ORDER # PRESSURE INJECTOR FLOW RATE ORIFICE TEMP.
200261561 500 - 3625 PSI 1.50-2.25 GPM 1.8 mm 176° F
200261571 500 - 3625 PSI 2.25-3.35 GPM 2.1 mm 176° F
200261581 500 - 3625 PSI 3.35-5.00 GPM 2.4 mm 176° F
BYPASS FLOW RATE INLET OUTLET WEIGHT
1/4" FPT 8 GPM 3/8" FPT 3/8" FPT 1.85 lb
Repair Kits: Valve #200261526
Bypass #200261528
Switch Kit #200261527
Injector #200260720
• Convenient downstream built-in chemical injector.
• Normally open in bypass.

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SUTTNER AMERICA COMPANY 121