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The RPSR Rotary Piston Spring Return Actuator is designed for heavy duty control applications the require optimum performance. The RPSR is typically utilized when applications require the control valve to fail open or fail closed upon loss of power supply gas. The RPSR incorporates a crank-arm mechanism specifically designed for the rigors of throttling control valve applications. The RPSR can accept high pressure power supply gas up to 500 psig (3447 kPa) enabling the use of smaller actuators or Becker's exclusive Bleed to Pressure System (BPS)™ feature.