Dwyer VB - Manual

Bulletin V-VB
the Series VB Volume Booster is a one to one signal to output relay
and an ideal solution to increasing valve stroke speed. A large input
signal change to the booster delivers high volume for quick throttling
control. Volume booster responds to the slightest changes in input
signal, which in turn increases accuracy of the output of air pressure to
the actuator. This booster receives the positioner’s signal output and
supplies the proper air pressure to the actuator to reduce response and
adjustment time.
features
• Supplies constant air pressure at the rate of 1:1.
• By-pass control ensures safety of control valve.
• Responds to the slightest change in input signal, increasing accuracy
of output air to the actuator.
• Built in mesh screen filters out unwanted dust and debris.
• Improves speed of valve movement.
• Boosts valve functions reaction speed.
Structure
The structure of the Series VB is shown below.
DWYeR InStRUMentS, InC.
phone: 219/879-8000 www.dwyer-inst.com
p.O. BOX 373 • MICHIGan CItY, InDIana 46360, U.S.a. fax: 219/872-9057 e-mail: [email protected]
SpeCIfICatIOnS
Max Supply pressure: 145 psi (10 bar).
Max Signal/Output pressure: 101.5 psi (7 bar).
Signal Connection: 1/4˝ NPT.
In/Output pressure Ratio: 1:1.
temperature Limits: -4 to 158°F (-20 to 70°C).
Linearity: ±1% FS.
Construction: Aluminum; SS (SS models only).
In/Output Connection: See model chart.
Weight: See model chart.
Specifications - Installation and Operating Instructions TM
Series VB Volume Booster
Weight
1.1 lb (0.5 kg)
2.9 lb (1.3 kg)
1.7 lb (0.76 kg)
4.2 lb (1.9 kg)
5.1 lb (2.3 kg)
11 lb (5 kg)
Model
VB-01
VB-01SS
VB-02
VB-02SS
VB-03
VB-03SS Cv
1.02
1.02
2.32
2.32
4.98
4.98
In/Out Connection
1/4˝ NPT
1/4˝ NPT
1/2˝ NPT
1/2˝ NPT
3/4˝ NPT
3/4˝ NPT
ADJUST BOLT
UPPER COVER
UPPER DIAPHRAGM
EXHAUST RING
LOWER DIAPHRAGM
BASE BODY
STEM (POPPET)
SPRING
DRAIN PLUG
S I G
VB-01 VB-02 VB-03
SIGNAL PORT
1/4 NPT
SIGNAL PORT
1/4 NPT
SIGNAL PORT
1/4 NPT
6-3/8
[162.02]
1-27/32
[47.00]
4-51/64
[122.00]
3-25/64
[86.00]
25/32
[20.00]
3-7/64
[79.00]
Ш3-15/16
[100.00]
4-15/64
[107.50]
1-3/64
[26.50]