Technical Specifications

28000 Series Varipak Control Valves | 13
Accessories and Options
Pneumatic Positioner (Model 7700P)
Type
pneumatic, force balance
Mounting
built-in bracket in actuator
Action
direct: increasing instrument signal
increases air output
Characteristics
linear
Instrument signal
3 to 15, 6 to 30 or 3 to 27 psi
200 to 1000, 400 to 2050 or
(200 to 1850 mbar)
3 to 9, and 9 to 15 psi
(200 to 600 and 600 to 1000 mbar)
split range
Connections
1/4" NPT instrument and supply –
1/8" NPT output
Average air consumption
0.15 scfm at 30 psi supply
(0.26 Nm
3
/h at 2.1 bar supply)
Max. air output
4.20 scfm (7 Nm
3
/h)
Supply pressure effect
0.05 percent of full stroke variation per
psi supply pressure change
(0.07 percent per 100 mbar)
Open loop gain
70
Linearity
± 0.5 percent
Sensitivity
0.1 percent
Repeatability
0.1 percent
Full stroke time
less than one second
Weight
3.3 lbs (1.5 kg)
Other Accessories
Proximity sensors and limit switches
Digital positioners – HART
®
and
Fieldbus Foundation
Handwheel, airsets and solenoid valves
Electropneumatic Positioner (Model 7700E)
Type
electropneumatic, force balance
Mounting
compact, without external linkage
to the actuator (see Fig. 15)
Action
direct: increasing instrument signal
increases air output
Characteristics
linear
Instrument signal
4-20 mA
Air Connections
1/4" NPT supply – 1/8" NPT output
Average air consumption
0.24 scfm (0.4 Nm
3
/h)
Electrical connections
1/2" NPT or M20
Weight
7.7 lbs (3.5 kg)
Hazardous Location Protection
ATEX Approvals (94/9/EC Directive)
Explosionproof
No. SIRA 02 ATEX 1274
Intrinsic Safety
No. SIRA 02 ATEX 2277 X
FM (Factory Mutual) Approvals
Explosionproof
Intrinsic Safety
Non-incendive and
Dust-ignitionproof
CSA Approvals
(Canadian Standards Association)
Explosionproof
Intrinsic Safety
Non-incendive
Figure 11: Model 7700P Pneumatic
Positioner
Figure 12: Model 7700E
Electropneumatic Positioner