PQ-FV in-line flow controls is ideal for low-cost and lightweight applications when mounting directly to an NPT port on a cylinder or valve is required. It can be easily added to existing circuitry and is lightweight and compact in size. In the meter-out versions, intake air flows freely through the flow control. Exhaust air is then metered out through an adjustment screw. With the meter-in series, air is metered in through an adjustment screw. Exhaust air flows freely.