Pressure independent VAV valve with pressure dependent backup

Details Pressure independent VAV valve with pressure dependent backup Pressure independent VAV valve with pressure dependent backup

1988-11-08

1989-05-16

Tanner, Harry B.

Automatic temperature and humidity regulation

Miscellaneous

Burner controls with automatic cutoff

236 495, 236 94, F24F 700, F25B 2900

Patent

active

048302740

ABSTRACT:
A pressure independent variable air volume valve (VAV valve) functions as a pressure dependent valve upon detecting a malfunctioning airflow indicator. Under normal operating conditions, the VAV valve modulates supply airflow to a comfort zone in response to the zone temperature and the rate of airflow through the valve. If the airflow indicator fails, the VAV valve modulates the supply airflow in response to the zone temperature, independent of the airflow indicator.

REFERENCES:
patent: 4291832 (1981-09-01), Ginn et al.
patent: 4406397 (1983-09-01), Kamata et al.
patent: 4432210 (1984-02-01), Saito
patent: 4653280 (1987-03-01), Hansen et al.
patent: 4716957 (1988-01-01), Thompson et al.

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