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Membrane Pressure Vessel Relocation
Use ONLY Dayco Imperial Nylo-Seal 88-NSR-1/2 tubing for high pressure connections.
Pay attention to the direction and flow path of the tubing before disassembly. Make sure
that you reinstall the tubing in the same manner. Rotate the 90 degree high pressure tube
fittings on the Clark Pump for ideal tube runs. The high pressure fittings are typically pre-
installed at the factory. These fittings seal with an O-ring and require no Teflon tape or pipe
dope. Loosen the backing nut, rotate the fitting, and reseat the backing nut.
Follow the high pressure tube connection instructions on the next page. Connect the
tubes to one of the components, secure the tube runs, and then trim and connect to the other
component. A 90 degree bend in a tube is better than a 90 degree fitting. A tube, when
mounted, should have at least one gentle bend to allow for expansion. Do not connect a
tube straight between hard mounted fittings.
When connecting the tubes to their components, be sure to hold the fitting body with a
wrench during the final tightening. Of special note are the stainless steel tube fittings on the
membrane housing which seal with an O-ring and should be seated all the way in, but need
only to be snug, not tight as with tapered threads. Hold the fitting with a wrench while in-
stalling the tube.
The fittings on the Clark pump have an O-ring seal and can be re-oriented by backing out
the O-ring stop nut. Rotate the fitting to align with the tube and tighten the nut just past
hand tight. Do not over tighten!