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YARWAY MODEL 20 PNEUMATIC DIAPHRAGM ACTUATOR
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
FIGURE 1
20 - 55
TABLE 1 - FUNCTIONAL SPECIFICATIONS
Type
20 - 55 (see fig. 1)
Type
Direct acting
Action
Stem extends with air pressure
Diaphragm
950 cm
Air displacement
5225 cm
Max. thrust
11 kN (48.800 lbf)
Spring range
1.0 to 3.8 bar (15 to 55 psi)
Travel
55 mm (2⅛")
Travel speed
Depending on spring range, air supply
pressure, piping arrangement and air
capacity of auxiliary devices
Travel indicator
Integrated pointer and stainless steel
travel scale
Air connection
½" NPT female
Air supply
6.0 bar (max. 87 psi)
Ambient temperature
-29°C to +70°C (-20°F to +158°F)
(std)*
Weight
46.0 kg (102 lbs)
Handwheel
Side mounted (see fig. 2)
Weight
19.0 kg (42 lbs)
Protection level (std)**
IP55
NOTE
* = Optional temperature: -40°C to +80°C [-40°F to +158°F]
** = Optional protection level: IP66
FIGURE 2
20 - 55
2
3
FIGURE 3
20 - 90
20 - 90 (see fig. 3)
Direct acting
Stem extends with air pressure
950 cm
2
8550 cm
3
10 kN (44.400 lbf)
1.0 to 2.2 bar (15 to 32 psi)
90 mm (3½")
Depending on spring range, air supply
pressure, piping arrangement and air
capacity of auxiliary devices
Integrated pointer and stainless steel
travel scale
½" NPT female
6.0 bar (max. 87 psi)
-29°C to +70°C (-20°F to +158°F)
68.0 kg (150 lbs)
Side mounted (see fig. 4)
19.0 kg (42 lbs)
IP 55
FIGURE 4
20 - 90
2
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