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Hydraulic & Fuel Filtration Division
VF-71E Filter Housing Installation Instructions
VEL1658R12 0316 PN09-881
www.velcon.com
Parker Hannifi n Corporation
Hydraulic & Fuel Filtration Division
1210 Garden of the Gods Road
Colorado Springs, CO 80907 USA
VF-71E Filter Housing
Installation Instructions
DESCRIPTION
Th
e VF-71E Filter Housing is designed for use in industrial applications with a variety of oils and other liquids. Th
e
housing is shipped with no cartridge installed. Cartridges must be ordered separately.
CONNECTIONS SIZE: 3/4" NPT
HOUSING PRESSURE RATING: 150 psi
NOTE: FOR LIQUID SERVICE ONLY. Do not use or leak test this fi lter vessel with compressed air or
other gasses.
INSTALLATION
1. Install the housing in an area that provides access to the inlet, outlet, and drain fi ttings. Allow at least 18 inches of
clearance above the band clamp for cartridge removal.
2. Make inlet and outlet connections to the appropriately labeled fi ttings. DO NOT fl ow backwards through the
housing.
3. Installation of pressure gauges is recommended to monitor diff erential pressure across the housing and to allow
accurate determination of when the fi lter cartridge should be changed. Th
e auxiliary tap in the vessel lid can be
used to install a gauge for measuring the pressure upstream. If the backpressure is expected to vary, it is recom-
mended that gauges be installed upstream and downstream.
4. On systems where pressure can exceed 75 psi, a pressure bypass around the pump should be installed to protect
the cartridge and the system from a high pressure shock of sudden cartridge seal-off due to a slug of water.
5. Installation of shut-off valves on the inlet and outlet lines may be required to isolate the housing during cartridge
change-out.
6. Install the cartridge as outlined in the cartridge change-out section.
7. Write the proper cartridge model number on the enclosed replacement cartridge label, fasten it to the housing
shell just below the VF-71E label, then cover the cartridge label with the enclosed clear plastic sticker.
OPERATION
1. Check that all unused fi ttings on the vessel are plugged.
2. Open the top air vent and check that the bottom housing drain is closed.
3. Start the pump and verify that air is venting from the housing. IF NOT,
TURN THE UNIT OFF; check all lines for
obstructions.
4. Allow all air to vent from the housing. Close the top air vent when fl uid
begins to bleed out.
5. Th
e vent should be opened periodically to expel any entrapped air. A large
accumulation of air will reduce the fi ltering area of the cartridge.
6. Check all fi ttings and lid for leakage. Additional tightening may
be required.
7. Note the pressure gauge reading. For most oils it will be below 5 psi with a
clean cartridge.
