65 251/123 ED
1/2
65 251/123 ED
0.75
0.75
T
B
31.75
31.75
P
A
25.9
25.9
15.5
15.5
5.1
5.1
12.7
12.7
31
31
M5
M5
Ø4
Ø4
Ø7.5 (max)
Ø7.5 (max)
21.5
21.5
30.2
30.2
40.5
40.5
33
33
CHM3
PILOT OPERATED
CHECK VALVE
SERIES 10
HYDRAULIC SYMBOLS
OPERATING PRINCIPLEMOUNTING SURFACE
— This is a check valve (spring closing and cone on edge
seals) with a built-in flow control feature. The mounting
surface is according to the ISO 4401 standards.
— Its use allows:
- to stop the flow in one direction;
- the flow in one direction, if opened by a pilot pressure;
- the free flow in the other direction.
— The CHM3 are always mounted under the ISO 4401-03
directional solenoid valves and can be assembled with all
other ISO 4401-03 valves.
PERFORMANCES (measured with mineral oil of viscosity 36cSt at 50°C)
Maximum operating pressure
Check valve cracking pressure
bar
350
3
Maximum flow rate in controlled lines
Maximum flow rate in the free lines
l/min
50
75
Ratio between the pressure in the locked
chambers and the piloting pressure
3.4:1
Ambient temperature range
°C -20 / +60
Fluid temperature range
°C -20 / +80
Fluid viscosity range
cSt 10 ÷ 400
Fluid contamination degree
According to ISO 4406:1999
class 20/18/15
Recommended viscosity
cSt 25
Mass
kg 1.3
MODULAR VERSION
ISO 4401-03
p max 350 bar
Q max (see table of performances)
ISO 4401-03-02-0-05
(CETOP 4.2-4-03-350)
CHM3-SA CHM3-SB
CHM3-D
65 251/123 ED
2/2
CHM3
SERIES 10
REPRODUCTION IS FORBIDDEN. THE COMPANY RESERVES THE RIGHT TO APPLY ANY MODIFICATIONS.
40
40
48
48
1
18.7
18.7
7.5
7.5
T
BA
P
96
96
80.5
80.5
46
46
2 - CHARACTERISTIC CURVES
(values obtained with viscosity of 36 cSt at 50°C)
1 - IDENTIFICATION CODE
Configurations:
D = seal on lines A and B of the actuator
SA = seal on line A of the actuator
SB = seal on line B of the actuator
dimensions in mm
only for CHM3-SB
only for CHM3-SA
3 - HYDRAULIC FLUIDS
Use mineral oil-based hydraulic fluids HL or HM type, according to
ISO 6743-4. For these fluids, use NBR seals. For fluids HFDR type
(phosphate esters) use FPM seals (code V). For the use of other
kinds of fluid such as HFA, HFB, HFC, please consult our technical
department.
Using fluids at temperatures higher than 80 °C causes a faster
degradation of the fluid and of the seals characteristics.The fluid
must be preserved in its physical and chemical characteristics.
NOTE: The standard valve is supplied with surface treatment of phosphating black. The zinc-nickel finishing on the valve body makes
the valve suitable to ensure a salt spray resistance up to 600 hours.
(test operated according to UNI EN ISO 9227 standards and test evaluation operated according to UNI EN ISO 10289 standards).
Option:
/ W7 = Zinc-nickel surface treatment
(see NOTE). Omit if not required.
Series No. (the overall and mounting
dimensions remain unchanged from 10 to 19)
Modular version
Pilot operated check valve
ISO 4401-03 size
C H M 3 - / 10
Seals:
N = NBR seals for mineral oil (standard)
V = FPM seals for special fluids
4 - OVERALL AND MOUNTING DIMENSIONS
1
Mounting surface with sealing rings:
4 OR type 2037 (9.25x1.78) - 90 Shore
