What length and size tube should be used with the 3d type remote pilot valves?
A. All testing at Milperra is performed with 6mm pilot lines no longer than 1000mm and with a bore of 4mm diameter. Pilot lines with a smaller bore restrict the exhaust of the dust collector valve and may prevent the valve from opening. Where the valve does open it is well established that even a small reduction in the bore of the pilot line will slow down the opening of the valve noticeably. Pilot lines of excessive length can also prevent a dust collector valve opening. This problem occurs when the pilot valve closes before the pilot line and dust collector valve is adequately exhausted to lift the diaphragm. The length at which this becomes a problem may vary between valves and installations, however a length of 1000mm is regarded as safe for most, if not all, applications. Where longer lines are required, the line length may be compensated in many cases by increasing the electrical on-time of the remote pilot valve. Naturally, the shorter the pilot line the faster the response of t
