Masoneilan 33000 Series Butterfly Valves Instruction Manual | 15
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16. Actuators
Masoneilan Types 31/32/33 Pneumatic actuators, spring-opposed rolling diaphragm.
Actuator type based on Valve size
Valve
Size
Actuator
Type
Effective area
Stroke
Spring range
Max. Supply
Pressure
3“ CL 150
33 Size B
450 cm
2
(70 sq. in)
66.5 mm ( 2” 5/8)
7 - 16 psi
2.4 bar (35 psi)
3” CL 300,
4” CL 150
33 Size C
900 cm
2
(140 sq. in)
66.5 mm ( 2” 5/8)
9 - 16 psi
4” CL 300,
6” & 8”
31/32 Size D
387 cm
2
(60 sq. in)
101.6 mm (4“)
12-28 psi
3.45 bar (50 psi)
17-40 psi
4.83 bar (70 psi)
29-68 psi
6.21 bar (90 psi)
•
Pneumatic Scotch Yoke Actuator available option
•
Rotork Actuator (SR)
•
Gearbox
33 Size B and C
31/32 Size D
Rotork CP Type
Rotork GP Type
Figure 3: 33000 Series Valve Actuators for Different Variants
