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The Price PCV is designed as a pressure control valve to regulate duct pressure in a VAV or VVT system.
The PCV uses either a field calibrated electric or PIC DDC controller to ensure that over or under pressurization of the duct will not occur.
Typical Applications
The PCV can be used as either a bypass unit or as a throttling device
In the bypass application, static pressure is normally measured 2/3 down the longest duct run. The PCV will bypass main supply air to a plenum or air handler return to maintain duct static pressure at a constant setting.
In the throttling (or "downstream") application, placing a static pressure sensor downstream of a PCV unit will allow for control of the pressure supplied to the VAV diffusers. The control valve is designed to maintain duct static pressure through adjustment of a control damper.
| Construction
PCV |
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- Rectangular ducts constructed of
22 gauge zinc-coated steel.
- Round ducts constructed of 24 gauge
zinc-coated steel.
- Damper fabricated from 22 gauge
zinc-coated steel, mechanically fastened.
- Damper shaft, sensor and all fasteners exposed to air flow are type 304 stainless steel.
- Damper shaft bearings and damper gasket are polyethylene.
- Controller cover and all external metal components are zinc-coated steel.
- SP300 sensor.
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Sequence of Operation –
Constant pressure, by-pass |
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- On an increase in duct static pressure the controller/actuator will open the VAV damper to increase the amount of air bypassed.
- On a decrease in duct static pressure the controller/actuator will close the VAV damper to reduce the amount of air bypassed.
- Duct static pressure is held constant.
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| Calibration |
PCV controllers require field calibration of the duct static pressure set-point. Controllers are factory set at a default value of 0.3 in. w.g. |
 Product Selection Checklist |
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- Select
Unit Size based on airflow requirement.
- Select
PCV.
Example:
16 x 15 PCV or 8 PCV |
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