Valvcon™ Quarterback™ QB-series quarter-turn mechanical spring back-up electric actuator

Versatile and dependable continuous-duty performance with mechanical back-up power

The Valvcon QB-series is an extremely versatile, quarter-turn electric actuator with integrated mechanical spring back-up power. Designed for a wide variety of valve and damper applications, the actuator includes a brushless DC motor for reliable, continuous-duty performance and is available in both NEMA 4/4X and NEMA 4/4X/7&9 configurations. Notable standard features include multiple power and control options, integrated mechanical spring back-up power, holding brake, heater/thermostat, and CSA (C US) certification.

Long-term reliability

Low maintenance

Low cost of ownership

Easy installation and configuration

Features

Universal power input; accepts 115/230VAC 50/60 Hz (1PH); 24VDC
Universal control; on/off or modulating from the same package
Field-reversible spring-stroke direction
Continuous duty cycle
CSA (C US) approval is standard
Internal mechanical spring back-up power drives to “safe” position after loss of input power

Applicable industries

Upstream Oil and Gas
HVAC / Tunnel Damper
Food and beverage processing
Water/Wastewater

Common use cases

Continuous duty applications requiring "fail to position" after loss of external power
Applications that may evolve over time; can be re-configured
24 VDC low-power applications
Plunger and gas lift at the wellhead
Steam injection
Separators
Power generation
Tunnel ventilation and fire suppression

Specifications

SERIES	QB
TORQUE OUTPUT	68 Nm, 600 lb-in, 50 lb-ft; QB 600;
	136 Nm, 1200 lb-in, 100 lb-ft; QB 1200
DUTY CYCLE	100% up to 55°C / 130°F
OPERATION	Reversing
ENCLOSURE*)	NEMA 4/4X or NEMA 4/4X/7&9
TEMPERATURE RANGE	-40°C to +55°C / -40°F to +130°F
VOLTAGE	115VAC 50/60 Hz (1PH), 230VAC 50/60 Hz (1PH), 24VDC
	*) 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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