Description
Valmet Flow control Valve automation excellence Actuators Valvcon™ Quarterback™ QB-series quarter-turn mechanical spring back-up electric actuator -Versatile and dependable continuous-duty performance with mechanical back-up power
Key Technical Specifications:
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SERIES
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QB
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TORQUE OUTPUT
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68 Nm, 600 lb-in, 50 lb-ft; QB 600;
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136 Nm, 1200 lb-in, 100 lb-ft; QB 1200
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DUTY CYCLE
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100% up to 55°C / 130°F
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OPERATION
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Reversing
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ENCLOSURE*)
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NEMA 4/4X or NEMA 4/4X/7&9
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TEMPERATURE RANGE
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-40°C to +55°C / -40°F to +130°F
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VOLTAGE
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115VAC 50/60 Hz (1PH), 230VAC 50/60 Hz (1PH), 24VDC |
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*) CSA (C US) Certification standard; NEMA 4/4X/7&9 models are Class I, Div. 1, Gr. C & D; Class II, Div.1, Gr. E, F & G; Class III
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Why choose Valvcon™ Quarterback™ QB-series quarter-turn mechanical spring back-up electric actuator?
The Valvcon™ Quarterback™ QB-series combines electric actuation with a mechanical spring return system , ensuring valves return to a safe position during power loss. This design offers a dependable fail-safe solution without the need for external power sources , making it ideal for safety-critical applications.
Typical applications
Emergency shut-off in oil & gas and chemical processing
Safety-critical valve operations in power and water plants
Isolation of process lines during power outages
Hazardous area environments requiring automatic fail-safe positioning
Additional features
Mechanical spring back-up for reliable fail-safe operation
Quarter-turn action for ball , butterfly , and plug valves
Rugged , corrosion-resistant construction for harsh environments
Manual override for local control
Compact design for easy integration into tight spaces
