Type 3510 and Type 3520 Digital Enclosure Regulators

Type 3510 and Type 3520 Digital Enclosure Regulators from Marsh Bellofram Corporation.

Marsh Bellofram Type 3510 single and Type 3520 double loop electro-pneumatic servo pressure controllers combine the advantages of reliable solenoid valves and digital control, housed in a rugged, weatherproof enclosure.  Available with a local keypad programming option or RS-485 digital communications for PLC or PC control, these precision controllers allow the user the ability to set and extract data directly from the transducer with a PC or automation system, making for some of the most precise, accurate, and reliable devices available on the market. With a forward flow of 1.25 SCFM at 100 psi, Types 3510 and 3520 can be used alone for many applications or combined with a volume booster for flows in excess of 2,000 SCFM.  Various pressure output ranges are available from 29″ Hg vacuum to 600 psig. Standard accuracy is ±0.5% full scale or better. Enhanced accuracy version is ±0.25% full scale or better. A four-digit display of the output pressure is available with the keypad model.



  • Digital display
  • Serial or DeviceNet interface
  • Digital or analog inputs
  • Analog monitor output
  • Single- and dual-loop control
  • Forward flow 1.25 SCFM at 100 psi
  • Weatherproof housing


  • Gripper Control
  • Welding Operations
  • Actuator Control
  • Machinery Automation
  • Precision Robotics
  • Tire Production & Testing
  • Web Tension
  • Semiconductor Equipment
  • Molding & Forming Operations