| BM20 | BM25 | BM35 | BF201 | 61
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VALVE INSTALLATION
Before installing the products, it is necessary to check that
it has not been damaged during internal handling and storage
operations. In case of long storage before usage, please check
that the product is complete with all its parts. In particular,
check that the protective plugs have not been removed. In all
cases in which the proper operation of the valve is doubtful,
make proper tests on bench and replace those parts found
faulty (oxidized, damaged, etc…). In case of uncertainty, please
contact an authorized BLB service center. Furthermore, make
sure that the system characteristics are those foreseen in the
original project (ltration, oil type and viscosity, temperature
control, tank capacity, etc…).
IMPORTANT: the installation of BM20, BM25, BM35 and BF201
requires the tightening of screws, ttings and hoses. For each of
these elements it is necessary to use the appropriate tools and
wrenches that allow the control of the tightening torque. Excessive
tightening causes deformations to the valve, compromising its
regular operation. Weak tightening may affect the functionality and
safety. Use the table below to determine the correct tightening
torque for each element. Do not use provisional extensions and
do not heat keys and wrenches.
PART THREAD
Nm
Fixing screws
M5 x 0,8
8.8
8
Fittings/Plugs
1/4’’ BSP
9/16”-18 SAE 6
16
3/8” BSP
3/4”-16 SAE 8
32
Main relief valves
3/8” BSP 32
3/8” BSP 32
BM20, BM25, BM35 AND BF201 INSTALLATION PROCEDURES
CONSISTS OF 3 STEPS:
STEP 1: xing
Prepare the area where the valve will be placed, in order to make
it easy to assemble, connect the hose and the adjustments during
start-up and testing. Install the valve in shock and vibration-free
areas. While moving the valve, do not cause accidental bumps or
shocks and follow the instructions listed in the “HANDLING AND
STORAGE” paragraph. The valve must be xed with M6 screws
through the holes provided. Apply thread-lock accessories. The
mounting position is irrelevant as long as the directional control
valve rests on a rigid and perfectly at surface. This is necessary
so that the tightening of the xing screws does not cause harmful
deformations.
This is necessary so that the tightening of the xing screws does
not cause harmful deformation.
STEP 2
: connecting the hydraulic hoses (inlet, uses, drain)
Use hoses and ttings suitable for the indicated maximum ow
and pressure.
It is strictly prohibited the usage of conic ttings and the reversal
of connections between inlet (P, P2) and tank lines (T, T2). In order
to avoid any contamination, remove the protective plugs from
the valve ports only when making hose connections. Do not use
tapes on the threads to make the seal. Tighten the ttings with the
tightening torque indicated in the previous table.
STEP 3: Sytem starting
Before starting, “wash the system” by ushing oil from an auxiliary
system. Start the system and then slowly operate the actuators
individually and not under load, until the system is lled with oil.
Proceed with the calibration of the valves and complete testing of
the system. If it is not possible to carry out the initial ushing, clean
the lter at the end of the testing. Do not calibrate valves without
rst applying a pressure gauge on the inlet section of the valve
and on line where deemed necessary.
INSTRUCTIONS