3329 Manual
KOBELT MANUFACTURING CO. LTD
Rev A
MNL-3329.docx
9
The exhaust ports do not need to be connected.
Install the port fittings using thread sealant and tighten to 2 - 3 turns from finger tight. Use brass pipe
fittings as steel fittings are too heavy and may split the port.
Do not over tighten the fittings as damage to the valve may occur.
The piping to the relay valves must be adequately sized to ensure adequate response times. The piping
must be selected to safely withstand the pressures required to operate the system. Secure the piping
against vibration with pipe clamps per the schedule in the table below.
Table 1: Pipe Clamp Table
PIPE CLAMP TABLE
PIPE SCHEDULE
3/8”
-
½” tube
[DN6]
¼” –
1/2”
pipe
½”
-
3/4” tube
[DN8-DN15]
¾
”
pipe
1”
-
1.25” tube
[DN20]
1
”
pipe
1
.50” tube
[DN25]
CLAMP SPACING
3 ft [914 mm]
4 ft [1219 mm]
5 ft [1524 mm]
6.5 ft [1981 mm]
All piping must be cleaned prior to connection to the actuators. Welded carbon steel piping must be
pickled to remove the scale produced by welding.
Kobelt 3329 relay valves
are equipped with “U” cups and “O” rings and therefore require lubrication in
order to provide long service life. Unlubricated seals will have excessive friction and wear. The oil that
is required for the lubricator should be a hydraulic type with a viscosity grade of 10 to 32 centistokes.
Heavy oils do not work well for lubricators.
The main supply line to the control head should be equipped with a filter, regulator and lubricator. The
filter’s function is to remove moisture and dirt in the system
, and the regulator will provide a constant
air pressure to the control system.
3.3
E
LECTRICAL
C
ONNECTIONS
The 3329-EP relay valve is equipped with three connection points as follows:
1.
Electro-proportional solenoid:
a.
2 pole + PE, DIN 43650-A
2.
Bypass solenoid:
a.
2 pole + PE, DIN 43650-A
3.
Pressure Feedback:
a.
4 pin
–
M12
Pin 1: Vin
Pin 2: not used
Pin 3: Output
Pin 4: GND
Ensure that the mating cables are securely fastened to their respective receptacles.
