德意美 elero 757085301 电机

elero 757085301    电机
Burst pressure 653 psi (45 bar)
Element collapse pressure rating
(conforming to ISO 2941)
72.5 psi (5 bar)(only cellulose
element)
145 psi (10 bar)
BY-PASS VALVE
By-pass setting 2.9 psi (0,2 bar) (Suction)
By-pass setting 25 psi (1,7 bar) (Return)
OPERATING TEMPERATURE
With Buna seals -22  195 °F (-30  90 °C)
With Viton seals -4  230 °F (-20  110 °C)
INDICATORS (3)
Rear manometer
Visual indicator
Electrical indicator
Visual diffential indicator
Visual electrical differential indicator
(3) Characteristics and dimensions at page 20 and 21
DEGREE OF FILTRATION
Absolute Filtration
Code Material Degree of filtration
FG010 Micro-fibre glass 10 m
FG025 Micro-fibre glass 25 m
Nominal Filtration
Code Material Degree of filtration
SP010 Cellulose 10 m
SP025 Cellulose 25 m
MS060 Steel 60 m
MS090 Steel 90 m
HF 620 / HF 625
2 002 ICAT008-002
01/03.2011
SIZING – PRESSURE DROP
The total pressure drop of the filter is calculated by summing the pressure drop value in the housing to the one in the filtering
element.
Total p  p in housing + p in element
In filters of HF 620 series in normal working conditions, the total p must not be more than 1.4 psi (0,1 bar) on suction
line and 5.8 (0,4 bar) on return line.
In filters of HF 625 series in normal working conditions, the total p must not be elero 757085301    电机more than 5.8 psi (0,4 bar).
To establish the values of pressure drop involved, the following pages provide some diagrams with curves referred to
the use of mineral oils SAE 10 with kinematic viscosity of 120 SSU (30 cSt) and density of 7.29 lb/gal (0,856 kg/dm3
).
Calculation example
Filter HF620-30.155-AS-FG010-B17-GG-B-XB-DA-G
Flow rate= 29 US gpm (110 l/min)
Kinematic viscosity: 120 SSU (30 cSt)
Oil density : 7.29 lb/gal (0,856 kg/dm3
)
Filtering degree: 10 m
Data obtained from the diagrams:
p in housing = 1.45 psi (0,10 bar) (page 5)
p in element = 3.77 psi (0,26 bar) (page 8)
Totalp = 1.45 + 3.77 = 5.22 psi (0,36 bar) (p is lower than maximum value admitted – therefore sizing is correct).
If oil with different kinematic viscosity and different density is used, the values obtained from the diagrams will be re-calculated
considering the following indications:
1) The pressure drop of the housing is proportional with the oil density, therefore for oil with density different to 7.29
lb/gal (0,856 kg/dm3
) the value of the p in the head-bowl will be:
p in housing =
p of diagram (psi) ? Oil density ( lb/gal) [psi] 7.29 (lb/gal)
Or
p in housing =
p of diagram (bar) ? Oil density ( kg/dm3
) [bar] 0,856 (kg/dm3
elero 757085301    电机)
2) The pressure drop of the element is proportional with the oil density and kinematic viscosity, therefore for oil with
density different to 7.29 lb/gal (0,856 kg/dm3
) and kinematic viscosity different to 120 SSU (30 cSt) the value of p in the
element will be:
p in element = p of diagram (psi) ? Oil density (lb/gal) ? Oil viscosity (SSU) [psi]
7.29 (lb/gal) 120 (SSU)
Or
p in element = p of diagram (bar) ? Oil density (kg/dm3
) ? Oil viscosity (cSt) [bar]
0,856 (kg/dm3
) 30 (cSt)

filter head (pos.2) or if needed by using a strap wrench.
It is advisable not to recover the oil in the element since it is