Latest Update: 20/04/2018
1
VB 450-200/300
- Unloader Valve
Technical Booklet:
E 258
Pressure regulating unloader valve.
It bypasses water flow at low pressure when gun shuts off.
DN 32
Technical Data
Max. Flow Rate: 450 l/min. Max. Temperature: 90°C
(1)
P/N
RATED
PRESSURE
bar - MPa
PERMISSIBLE
PRESSURE
bar - MPa
MIN.
ADJUSTABLE
PRESSURE
bar - MPa
(2)MAX PRESS.
INCREASE AT
SYSTEM SHUT
OFF
%
(3)PRESSURE
DROP AT
BYPASS
RESET
%
INLET
OUTLET
BYPASS
WEIGHT
g
60.4020.00
200 - 20
220 - 22
20 - 2
10,7%
43,8%
1“1/4 Bsp FF 1“1/2 Bsp F
5950
60.4030.00
300 - 30
330 - 33
30 - 3
7,8%
43,3%
1“1/4 Bsp FF 1“1/2 Bsp F
6025
(1)
The valve is especially designed for a constant use at a water temperature of 60°C. It can withstand up to a max.
temperature of 90°C for short intervals only.
(2)
The max. pressure increase at system shut off is a percent value of calibration pressure. When it occurs, the valve is
set in operation and the whole fluid is diverted into bybass.
(3)
The pressure decrease at bypass reset is a percent value of calibration pressure. It indicates the pressure drop
required for the valve to restore pressure in the system.
Instruction, Maintenance, Installation, Spare Parts Booklet.
For a correct use of the item, please follow the instructions.
Please copy all relevant information on the use and maintenance booklet of
the machine.
n. 12.9258.00
60.4020.00
VB 450/200
1”1/4 Bsp FF
60.4030.00
VB 450/300 1”1/4 Bsp FF
-Intended for use with high flow rates
-Special steel spring with superior mechanical features, to maintain
calibration settings for longer
-Check valve specifically designed to prevent jammings
-Screw/Locknut adjusment to set maximum pressure level
-Dynamic seals with O-ring and sliding gasket
-Fixing screw slots
