VIPER ACTUATORS

BLAC INC. Viper Series electric servo mechanical actuators are designed for both modulating and on-off applications.

The Viper Series actuators utilize a bi-directional motor control to operate a linear output cylinder drive with zero backlash when changing directions.

The Viper design applies the BLAC INC. patented hydraulic actuator cylinder rod seal to prevent contamination of the drive cylinder internals. The motor controller uses position feedback to indicate the controlled position while continuously maintaining the valve command position.

BLAC INC. Viper Electric Drive for FCCU Slide Valve

Viper Brochure Download

 

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Viper Features

  • Precise modulating control

  • Positioning control, accuracy, linearity and repeatability of <0.1% stroke under a varying load

  • All-electric actuator without gears

  • Linear rising stem and quarter turn actuators

  • Fail in position with zero drift

  • Fail to end of stroke position by spring or by UPS supplied system

  • On-Off applications

  • Can be wired to replace MOV applications

  • All worldwide electrical hazardous area classification

  • Corrosion free construction materials of stainless steel and anodized aluminum

  • Mounts in place of a pneumatic or hydraulic cylinder

  • Performs equivalent to electro-hydraulic actuators

 

BLAC INC. Linear Drive
for Rising Stem Valve

 
 
 

Electric Drive Actuator System
for FCCU Catalyst Withdrawal Valve

Double Viper Drives for Quarter Turn Actuator

 

Viper Data Sheet

Viper Electric Servo Mechanical Actuator
Command Signals 4-20 mA, On-Off Digital
Feedback Signals 4-20 mA
Normal Thrust 2000 lbf (8896 N) to 80,000 lbf (355,680 N)
Normal Torque 3000 lb-in (339 N-m) to 750,000 lb-in (84,765 N-m)
Stroking Speed Contact us to discuss application needs
Hysteresis/Linearity/
Repeatability		 0.1% of span (under load)
Sensitivity/Dead Band 0.1% of span (under load)
Ambient Conditions -40 to 130°F (-40 to 54°C)
Area Electrical
Classification		 IECEx, ATEX and NEC
Actuator Travel 1 1/2 to 48 in. (38 to 1,220 mm)
Motor Voltage Primary 220-600 VAC, 3 Phase
Motor Voltage Option 115/230 VAC, 1 Phase
Instrument Power 24 VDC or 110/220 VAC, 1 Phase
 

Viper Linear Thrust

Drive Size Thrust Max lbf [N]
30 2500 [11,115]
45 5500 [24,465]
60 10,000 [44,460]
80 30,000 [133,380]
 

If alternate sizes are required, please contact BLAC INC.

Viper Quarter Turn Torque

Drive Size Output Torque lb-in [N-m]
30 R 10,000 [1130]
45 R 33,000 [3730]
60 R 60,000 [6780]
80 R 195,000 [22,040]

If alternate sizes are required, please contact BLAC INC.