Bray 6P Series User Manual

Adjustment – Poppet Seat
Balance Pressure A/M Adjustment
NOTICE
The Poppet Seat Adjuster is factory set and sealed
before the positioner is shipped. Do not adjust
Auto / Manual default setting (Automatic) as shown.
Troubleshooting
Positioner does not respond to the input signal
1. Check the supply pressure to the actuator. The
supply must be at least 40 psi / 2.7 Bar / 0.27 MPa
2. Check if input signal is properly supplied to the
positioner. The signal range should be 3-15 psi.
3. Check if the positioner’s nozzle (5) has been
blocked. If the nozzle has been blocked by any
substances, please contact your local
Bray distributor for a replacement.
4. Check if feedback shaft has been adjusted
properly and engaged to actuator pinion.
The pressure of OUT 1 reaches exhausting
pressure level and does not come back down
1. Check Auto/Manual (A/M) switch. For proper
operation it must be in the “A” position.
2. Check for a gap or damage between the nozzle
(5)andtheapper(13). If damaged, please con-
tact your local Bray distributor.
Hunting occurs
• Check if feedback springs (15) have been dis-
placed.
• Hunting may occur when the positioner is
attached to a very small capacity actuator (ex:
Bray Series 92/93 size 48). In such case, install
anoutputoriceforOUT1andOUT2perthe
following steps.
1. Remove Pilot Valve Assembly (Figure 2).
2. Remove the O-ring from OUT 1 and OUT 2
port,installoriceinandreinstalltheO-ring
to OUT 1 and OUT 2 again. When mounting
theoutputorice,payattentionnottoletdust
ordebrisentertheorice(Figure 16).
3. If hunting does not stop after installing the
outputorice,pleasecontactyourlocal
Bray distributor.
Actuator only operates Open or Closed
1. Check tubing connection
2. Check cam direction
Linearity is too low
1. Check if Zero and Span has been properly adjusted.
2. Check if supply air pressure level is stable from
the regulator. If the level is unstable, replace the
regulator.
O-ring
Orifice Diameter
Orifice
OUT 1
OUT 2
O-ring
Orifice Diameter
Orifice
OUT 1
OUT 2
Bray
®
is a registered trademark of BRAY INTERNATIONAL, Inc.
© 2013 Bray International. All rights reserved.
OM-6P-001 11-2013
R
CONTROLS
Figure 15
Figure 14
A/M
Automatic/ Manual
Poppet Seal
Adjuster
A/M
A/M
Bray Series 6P
Operation and Maintenance Manual
JamiesonEquipmentCompany
www.jamiesonequipment.com
tollfree800.875.0280

Bray 6P Series Specifications

General

Brand	Bray
Model	6P Series
Category	Valve Positioners
Language	English