ABB AV Series Pneumatic and Electro-Pneumatic Valve Positioners

ABB's line of pneumatic valve and cylinder positioners consist of the AV1, AV2, AV3 and AV4 series.  These are the current models of the Bailey (Bailey Controls, Bailey Fischer & Porter} series of positioners.

The Series consists of four models:

The AV1 is the basic model and accepts 3-15psi or 3-27 psi pneumatic inputs, see more about the AV1 here

The AV2 accepts a 4-20ma input and will Fail Safe (open or close) on loss of signal

The AV3 DISCONTINUED accepts a 4-2ma input and will fail in place (hold last position) on loss of signal

The AV4 DISCONTINUED accepts a pulse input and will fail in place on lose of signal.

The AV27 is a positioner for hazardous areas that accepts a 4-20ma signal via an explosion proof I/P

The AV series are all made in the USA and there are a number of conversion kits for older models.

If you are using a 4-20ma input and want to upgrade to an intelligent positioners please check out the TZIDC Series

AV Plain
Basic AV2, no gauge block and no manifold

Basic AV no gauge block, and no manifold

AV with gauge block
Basic AV2 with gauge block, no manifold

Basic AV with gauge block, but no manifold

AV with manifold

AV with manifold

AV with manifold

AV with manifold, side view

Drive Shafts

Types of Drive Shafts

AV Series of Positioners

The AV series of positioners offers a number of cam operated units with different inputs to meet various needs

AV sereis of positioners
  • High throughput capacity - up to 27scfm at 80psi air supply eliminates the need of boosters
  • Characterizable output - large position cam contains field selectable linear, square & square root relationships
  • High temperature solutions - the AV1 with high temperature option is suitable for 250deg F (121deg C)
  • Accurate calibration - independent zero & span adjustment eliminates interaction and provide fast, accurate calibration.
  • Rugged compact all metal design provides long life service
  • Performance pilot valve option provides fast action to small set point changes
  • Suitable for single acting or double acting applications
  • Simplified design with field serviceable or replaceable components
  • High supply pressure of up to 150psig
  • Simplified Reverse operation
  • Simplified Calibration - Independent Zero and Span Adjustment
  • Elevated zero or Suppressed range - Up to 50% of zero or span possible

AV27 Electro - Pneumatic FM/CSA CL 1 DIV 1

AV27 standard AV! with explosion proof I/P directly mounted
  • Standard AV1 with Explosion Proof I/P directly mounted
  • FM/CSA Approvals
  • Explosion-Proof for Class I  Division 1 - Groups B, C, & D
  •  Dust-Ignition Proof for Class II  Division I - Groups E, F
  • G Suitable for Class III, Division I
  • Intrinsically Safe for Class I, II, III Division 1 - Groups A, B, C,D, E, F, G When Used with an Approved Intrinsic Safety Barrier
  • Non-Incendive for Class I, II, III, Division II Groups A, B, C, D, E, F, G