Request Information
Series 'AVDT '

Available in sizes from 1/2" npt to 1" npt for operating pressures up to 300 psig liquid service at temperatures up to 338 deg. F. and specific gravities down to 0.95.

For installation at the high points of liquid systems to allow for the venting of air during initial system commissioning and for the removal of entrained gasses during system operation.

AVDT Models are:
  • Model AVDT-150: for service pressures up to 150 psig
  • Model AVDT-300: for service pressures up to 300 psig
Materials of Construction:
  • Body: Cast Iron
  • Cover: Cast Iron
  • Mechanism: Stainless Steel
  • Float: Stainless Steel
  • Disc: EPDM
  • Gasket: Non Asbestos Fibre
  • Cover Bolts: Steel
Features:
  • The soft EPDM seating allows for bubble tight operation and eliminates the nuisance 'spitting' often associated with metal-to-metal seats.
  • The cover is fitted with a 1/2" npt plugged connection. This can be fitted with a full bore ball valve to allow for manual by-pass to decrease start-up time during system filling.
Unit of Measure
Connection Inlet Size1 N/A 3/4 in

Connection Outlet Size

 N/A 1/2 in

Orifice

 N/A 1.6 mm1/16 in

Maximum Operating Temperature TMO

 N/A 250 ºF

Cover Material

 N/A Cast Iron – A126, Class B

Body Material

 N/A Stainless Steel, T304, A240

Lever Frame Material

 N/A Stainless Steel, T304, A240

Seat Material

 N/A Stainless Steel, T304, A240

Float Material

 N/A Stainless Steel, T304, A240

Gasket Material

 N/A Non-Asbestos

Cover Bolt Material

 N/A Carbon Steel – SAE Grade 5

Float Arm Material

 N/A Viton

Orifice Button Material

 N/A Stainless Steel, T303, A276

Pivot Pin Material

 N/A Stainless Steel, PH 15-7 MO

Pin Retainer Material

 N/A Malleable Iron

Pipe Plug (1/2") Material

 N/A Stainless Steel – T18-8, A276

Locator Material

 N/A Stainless Steel – T18-8, A276

Weight

 N/A 2.5 kg5 lb

Air Capacity (Discharge to Atmosphere) at 25 psi (172 kPa)

 N/A 2.5 scfm

Air Capacity (Discharge to Atmosphere) at 50 psi (345 kPa)

 N/A 4.0 scfm

Air Capacity (Discharge to Atmosphere) at 75 psi (517 kPa)

 N/A 5.5 scfm

Air Capacity (Discharge to Atmosphere) at 100 psi (690 kPa)

 N/A 7.1 scfm

Air Capacity (Discharge to Atmosphere) at 125 psi (862 kPa)

 N/A 8.6 scfm

Air Capacity (Discharge to Atmosphere) at 150 psi (1034 kPa)

 N/A 10.1 scfm
  • 1 3/4" is standard, for another click on Request Information Button