LJ Engineering

Model 470-002 Vacuum Flow Amplifier

The Model 470-002 is ideal for vacuum regulator applications requiring more vacuum flow than the capacity of the Model 487 alone. For finer vacuum setting resolution a Model 484 can be used with the 470-002 vacuum flow amplifier. However, a small atmospheric leak is required if used with the Model 484 regulator to enable to lower vacuum settings since the 484 is not self-relieving. Vacuum Flow rates of up to 44 scfm are possible with only a 1 psi pressure drop across the device. Flow rates in excess of 44 scfm will result in more pressure drop across the regulator. The flow booster is a non-relieving design, which means vacuum down stream must be vented by introducing an air leak (if no leakage is already present) in order to enable reductions in the vacuum setting.



Operating principle:

The Vacuum Flow Amplifier or sometimes referred to as a vacuum flow booster operates in conjunction with a model 487 Electronic Vacuum Regulator (pilot vacuum generator). The flow amplifier will boost the vacuum flow capacity to provide vacuum flow rates of up to 44 scfm while regulating vacuum to pilot vacuum setting.

Vacuum Range:

Follows the vacuum setting of the Model 487 or 484 Electronic Vacuum Regulator. Non-relieving design

Flow Capacity:

Flow coefficient: Cv = 3.4 and SHF = 12.2

1/2 inch (12.7 mm) minimum flow path diameter

Port Connections:

Pilot port: 1/8 inch inside hose diameter (Tygon R polyurethane recommended)

Flow port inlet and outlet 1/2 inch female NPT


4.2 inch (155 mm) diameter by 1.9 inch (49 mm) high


1.8 pounds (820 g)

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