Dwyer VB - Manual (Page 2)

©Copyright 2011 Dwyer Instruments, Inc. Printed in U.S.A. 12/11 FR# RB-443956-00
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]
Installation
Note: When the volume booster is replaced or installed, make sure of the
following:
1. Always wear safety equipment and follow safety procedures to prevent
injury.
2. Check product’s maximum specifications before installation to ensure
they are not exceeded. In order to minimize the damage in case of an
accident, be sure all compressed and pressurized input lines are by-
passed.
3. Air must be clean and dry to ensure proper functioning.
4. Inflow air must be exhausted through the volume booster’s side exhaust
port.
5. Make sure to check exhaust port for blockage or foreign objects.
Installing Series VB
When installing Series VB, be sure to check the following:
1. The VB should be installed between an actuator, positioner, and supply
line.
2. Before connecting any pipes, make sure the inside of pipe is clear, and
the size of the pipe is relevant to the capacity of the booster.
3. If the booster must be mounted on a bracket, be sure the bracket is
made according to the outer diameter.
Installation Layout of Series VB
troubleshooting
Valve is unresponsive to signal sent to positioner.
1. Check to see if air pressure supplied is constant and is held steady from
regulator to positioner and/or volume booster.
2. Check to see if air pressure is being exhausted from positioner’s exhaust
port.
3. Check supply and exhaust ports for blockage. Be sure they are free of
debris and foreign objects.
Unstable valve operation when signal is sent to positioner.
1. Reduce valve packing and/ or valve friction level.
2. Increase the size of the actuator.
Hunting occurs when the signal has been sent to the positioner.
1. Reduce valve packing and/or valve friction level.
2. Increase the size of the actuator.
3. Rotate control screw on top of booster counter-clockwise to reduce
sensitivity.
Slow valve operation after signal has been sent to positioner.
1. Check to see if regulator control pressure is too low.
2. Check supply line to actuator for blockage.
3. Check for leaks in the system.
4. Rotate control screw on top of booster counter-clockwise to enhance
sensitivity.
MaIntenanCe/RepaIR
Upon final installation of the Series VB, no routine maintenance is required.
The Series VB is not field serviceable and should be returned if repair is
needed. Field repair should not be attempted and may void warranty.
WaRRantY/RetURn
Refer to “Terms and Conditions of Sales” in our catalog and on our website.
Contact customer service to receive a Return Goods Authorization number
before shipping the product back for repair. Be sure to include a brief
description of the problem plus any additional application notes.
SUP. PORT
(COMPRESSOR)
OUT PORT
(ACTUATOR)
SIG. PORT
(POSITIONER)
PIPE(NIPPLE)
M6X30 BOLT
M8 BOLT
BRACKET
ACTUATOR