The pressure switches PS* are electro-hydraulic piston type, with an electric exchange contact that switches to achieve a predetermined pres- sure value.
The pressure in the hydraulic circuit acts on the internal piston, opposed by the spring, whose load can be adjust by or with the adjustment screw or the knurled knob. Upon reaching the set pressure, the piston moves causing the exchange switching of the micro-contact.
The pressure switches are available with four pressure ranges from 6 to 630 bar, with wall mount or threaded of 1/4″ BSP, female.
The version with the adjustment knob is provided with a graduated ver- nier with the values of pressure.
MAX OPERATING PRESSURE (PS): 650 bar
PRESSURE TEST (PT): 1.43 x PS
SETTING RANGE: 6 ÷ 630 bar
WORKING TEMPERATURE: -20 ÷ +120 °C
REPEATABILITY: ≤ 1% of the value set
HYSTERESIS: see Table 12.3l/m
FLUID VISCOSITY RANGE: 10 ÷ 400 cSt
RECOMMENDED VISCOSITY: 36 cSt
FLUID CONTAMINATION DEGREE: class 20/18/15 according to ISO 4406/99
BODY MATERIAL:die-cast aluminium
SEALS: – P = Nitrile rubber (NBR) – V = Fluorocarbon (FPM)
HYDRAULIC CONNECTION: – G = 1/4” BSP ISO 228, female – F = plate with screws
ELECTRICAL CONNECTION: Electrical 3 poles connector + earthling DIN 43650 Pg 9
ELECTRICAL FEATURES: see Table 12.3c WEIGHT: see Table 12.3f/g/h/i