17
Note
Make sure the ‘‘Y’’ drain port is piped directly to the tank.
Back pressure cannot be tolerated at this valve port.
CAUTION
On solenoid operated directional valves, ensure
an electrical ground is connected to the valve.
This prevents the possibility of a shock hazard
if a coil develops a short circuit to the frame.
B. Fluids and Seals
Standard seals (Nitrile) can be used with petroleum,
water-glycols, and water-oil emulsion type fluids.
F1 seals (Butyl, EPR) must be used for alkyl
phosphate-ester base fluids and aircraft type fire-resistant
fluids. F1 seals cannot be used with petroleum or phosphate
ester-hydrocarbon blends.
F3 seals (Viton
) can be used with all commonly used
industrial hydraulic fluids. Viton
is compatible with
petroleum, water-base and synthetic fire-resistant fluids.
Viton is a registered trademark of E.I. Dupont
F6 seals (Nitrile) can be used with petroleum, water-glycols,
and water-oil emulsion type fluids.
The following table summarizes the compatibilities of the
most common phosphate ester fluids.
Fluid Type
F1
F3
F6
Skydrol
Yes
No
No
Pydraul 10-E
Yes
No
No
Pydraul 29-E-L-T, 50-E
65-E, 115-E
Yes
Yes
Yes
Pydraul 230-C, 312-C,
540-C
No
Yes
Yes
Fyrquel & Fyrlube
Yes
Yes
Yes
Fyrtek
No
Yes
Yes
Houghton Safe 1000 Series
Yes
Yes
Yes
C. Piping and Tubing
1. All pipes and tubing must be thoroughly cleaned before
installation. Recommended cleaning methods are
sandblasting, wire brushing and pickling.
2. To minimize flow resistance and the possibility of external
leakage, use only the necessary fittings and connections
required for proper installation.
3. The number of bends in tubing should be kept to a
minimum to prevent excessive turbulence and friction of fluid
flow. Tubing must not be bent too sharply. The recommended
radius for tube ends is three times the inside diameter.
D. Hydraulic Fluid Recommendations
Hydraulic fluid within the systems performs the dual function
of lubrication and transmission of power. To insure proper
lubrication, system life, and component reliability, fluid
selection should be made carefully with the assistance of a
reputable supplier. Fluid selection should be acceptable for
use with all valves, motors and pumps within the system.
The fluid recommendations noted in the data sheet are
based on our experience in industry as a hydraulic
component supplier. Where special considerations indicate a
need to depart from these recommendations, see your
Vickers sales representative.
E. Cleanliness
To ensure your hydraulic system is clean, perform the
following steps:
Clean (flush) the entire system to remove paint, metal
chips, welding shot, etc.
Filter each oil change to prevent introduction of
contaminants.
Provide continuous oil filtration to remove sludge,
products of wear and corrosion generated during the life
of the system.
Provide protection to all areas that can introduce
airborne contaminants into the system.
Perform regular servicing procedures of filters, breathers,
and reservoirs.
F. Overload Protection
A relief valve must be installed in the system as close to the
pump as possible. the relief valve limits pressure in the
system to a prescribed maximum. The setting of the relief
valve depends on the work requirements of the system.
