Double Acting Type Pneumatic Valve Positioner Model VPP02/03 OVERVIEW

Double Acting Type Pneumatic Valve Positioner Model VPP02/03 OVERVIEW
No. SS2-8310-0300
Double Acting Type
Pneumatic Valve Positioner
Model VPP02/03
OVERVIEW
Model VPP02/03 double acting type pneumatic valve
positioner mounted on the valve is a force-balance
servo mechanism designed to position the control
valve correctly and rapidly by bleeding or feeding air
to the diaphragm, double acting actuation in
accordance with the pneumatic signal from a
controller.
SPECIFICATIONS
Model
VPP02 : Supply air pressure
200 to 340 kPa {2.0 to 3.5 kgf/cm²}
VPP03 : Supply air pressure
350 to 690 kPa {3.6 to 7.0 kgf/cm²}
(1)
Input signal
(1)
Full range 20 to 100 kPa (Standard)
Half range 20 to 60 kPa (Low range)
Half range 60 to 100 kPa (High range)
Code
1
2
3
Output characteristics:
Linear, Equal percentage and Quick opening.
Supply air pressure:
Additional specifications (by special order):
200 to 690 kPa {2.0 to 7.0 kgf/cm²}
Corrosion-resistant and silver finish (Semi-standard specification Y138):
• Corrosion-resistant (Acryl baking) finish (Y138A) ;
Resistance for corrosive gases.
• Corrosion-proof (Epoxy baking) finish (Y138B) ;
Resistance for corrosive liquids.
• Silver-normal (Acryl baking) finish (Y138C) ;
Protection for temperature rise of device caused by
direct sun light, radiation heat, etc.
• Silver-corrosion-resistant (Acryl baking) finish (Y138D) ;
Protection for above-mentioned temperature rise
and resistance for corrosive gases.
Air consumption:
20 Nl/min. (normal state, supply air pressure 490 kPa
{5.0 kgf/cm²})
Maximum capacity of air flow:
250 Nl/min. (supply air pressure 490 kPa {5.0 kgf/cm²})
Pneumatic tubing connection:
Rc 1/4
Ambient temperature:
-30 to +80 °C
Performance:
Note) Silver finish is not applicable for alkaline gases.
Accuracy ; + 1% F.S.
Dead band ; 0.5% F.S.
Weight:
3.5 kg
Travel adjustable range:
14 to 100 mm
Housing material:
Aluminum alloy casting
Finish:
Acryl baking finish (For corrosion-resistant and silver
finish, refer to the optional specification.)
Color of finish:
Dark beige (Munsell 10YR 4.7/0.5)
-1-
9th edition
No. SS2-8310-0300
Azbil Corporation
Cam characteristics:
Linear (cam 1, standard) and two other kinds. By
selecting the other two cams, valve characteristics can be
approximated as follows:
10
90
20
80
30
70
40
50
60
70
Direct acting positioner
Reverse acting positioner
Input pressure span (%)
0 100
(1) For reverse acting valve
Cam 2
• Linear characteristic valve plug
--> Quick opening characteristic
• Equal percentage characteristic valve plug
--> Linear characteristic
Cam 3
• Linear characteristic valve plug
--> Equal percentage characteristic
• Quick opening valve plug
-->Linear characteristic
CAM 3
60
CAM 1
50
CAM 2
40
30
80
20
90
10
100
0
10
20
30
40
50
60
70
80
90
(2) For direct acting valve
100
Valve stem travel (%)
The effect of cams 2 and 3 applied to direct action valves
is reversed as compared with the case of reverse action
valves.
Figure 1 Cam characteristics
(Unit : mm)
Output air
connection
Rc1/4
163
55
108
17
58
105
278
147 56
48
28
Output air
connection
Rc1/4
Supply air
connection
Rc1/4
20
60
Input air
connection
Rc1/4
Figure 2 External dimensions
Ordering information
When ordering, please specify;
1) Model number
2) Input range
3) Supply air pressure
4) Actuator model No.
5) Output characteristic
6) Option
-2-
Note
Please, read ‘Terms and Conditions’ from following URL before
the order and use.
http://www.azbil.com/products/bi/order.html
Specifications are subject to change without notice.
1-12-2 Kawana, Fujisawa
Kanagawa 251-8522 Japan
http://www.azbil.com/
9th edition: Aug. 2015
No part of this publication may be reproduced or duplicated
without the prior written permission of Azbil Corporation.
(11)
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