P.A. VB 280 Technical Manual

VB 280-VB350
Pressure regulating unloader valve.
At gun shut off, the water flow is bypassed at reduced pressure.
Part Number Rated
pressure
bar - MPa
60.1600.00 280 - 28
60.1700.00 350 - 35
(1) The valve has been designed for a continuous use at a water temperature of 60° C. It can resist for sh ort periods at a
maximum temperature of 90° C.
(2) This is the maximum pressure increase implemented in the circuit for the intervention of the valve and to bring all the
fluid in bypass (percentage figures of the pressure set up)
(3) This is the pressure reduction necessary in comparison to the set up, in order that the valve brings back pressure in
the circuit. (percentage figures of the pressure set up)
Instruction manual, maintenance, installation, spare parts.
For a correct utilization, follow the directions of this manual
Re-print them on the Use and Maintenance booklet of the machine.
- Unloader Valve (discharging)
•
60.1600.00 VB 280
•
60.1700.00 VB 350
- Assembly equipped with a high pressure proof compensation.
- Compact dimensions.
- Sturdy steel and brass construction.
- Adjustable locknut to control max pressure.
- Possibility to fit a venturi injector, on delivery, for chemicals.
- Nylon knob
- By-pass G1/2 F.
- Easy maintenance.
Technical specifications
Max. flow rate: 40 l/min.
Permissible Minimum
pressure adjustable
pressure
bar - MPa bar - MPa
310 - 31 28 – 2.8
390 - 39 35 – 3.5
G 3/8 MF
G 3/8 MF
Max temperature: 90° C (1)
(2)Trapped (3)Pressure drop
pressure at circuit to reset bypass
closure
%
12
12
Last update: 14/07/10
E 237
Technical manual:
DN 10
CE
Inlet
Outlet
bypass
%
44 G3/8 MF
44 G3/8 MF
n. 12.9237.00
Weight
g
850
880
1