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 a continuous-duty and extremely versatile brushless DC electric actuator designed for quarter-turn valve and damper applications. It is available in both NEMA 4/4X and NEMA 4/4X/7&9 configurations. Notable standard features include multiple power and control options, mechanical spring back-up power, holding brake, heater, 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 
  • Loaded with standard features 
  • 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 
  • Low-power solar 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%, @ +40°C / +104°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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