Habonim Catalog Interactive 2024 V04 15022024 - Catalog - Page 486
ACCESSORIES
IMPACT™
Self opening
When the actuator has closed the valve the IMPACT™ maintains the air pressure on the springs
until the next operation. This gives the actuator a higher spring end torque which is ideal for
“self-opening" valves. Because high pressure fluid loads the entire valve port it creates a force
that acts against the actuator springs.
How to calculate additional spring closing torque
The following steps will help you understand how to calculate the additional torque the
IMPACT™ Air Assist will give your Spring Return actuator. The IMPACT™ will work with any
type actuator, and you should use the torque tables provided by your actuator of preference:
Step 1: Calculate Torque difference
In the Double acting Torque table find the actuator model and size that you are working with.
Calculate the torque difference of 1 bar at any pressure.
Example shown The Spring Return actuator model size is C30 and the ∆P of 1 bar calculated
is between 5.0 bar (73 psi) and 6.0 bar (87 psi). The additional torque will be: 130-107=23[Nm]
(1,150-947=203in-lb).
Step 2: Calculate Spring Torque
In the Spring Return torque tables find the actuator model and size with the spring combination
that you are working with. Locate the Spring End torque and add the additional torque as above.
Example shown The Spring Return actuator model size is C30 with 2C spring combination.
The Spring End torque is 44[Nm] (389in-lb). The new Spring End torque will be: 44+23=67[Nm]
(389+203=592in-lb).
Double acting table
Model
∆P = 1 bar
Spring return table
Operating pressure (bar)
Size
Spring
set
3.0
4.0
5.0
6.0
7.0
8.0
C15
C20
10
14
17
21
24
27
2A
18
25
32
38
45
51
2A2B
C25
39
52
65
79
92
105
C30
62
84
107
130
153
176
486
ACTUATION
C30
Air pressure - bar (psi)
Spring torque
3.0 (44)
7 (102)
8 (116)
Start End Start End Start End Start End
36
19
125
107
148
129
42
26
120
96
143
118
53
31
2B
115
87
138
109
62
36
2C
107
72
130
94
78
44
