Product Info
The Bray Series 6P is a pneumatic positioner designed to operate quarter-turn valves and actuators. It features quick and accurate response, high energy efficiency, and simple zero and span adjustment procedures. The positioner can be easily switched between double acting and single acting operation.
Preventive Maintenance Schedule
Monthly:
- Inspect and clean nozzle and flapper
- Check zero and span adjustments
Annual:
- Replace any worn or damaged parts
Semi-annual:
- Inspect and clean all internal components
- Lubricate moving parts
Weekly:
- Inspect for any damage or wear
- Check supply air pressure
Daily:
- Check for proper operation and leaks
Parts List
- Spool: Spool component of the positioner (Part Number: Not Available)
- Right Poppet: Poppet component of the positioner (Part Number: Not Available)
- Seat: Seat component of the positioner (Part Number: Not Available)
- Spool Chamber: Chamber component of the positioner (Part Number: Not Available)
- Nozzle: Nozzle component of the positioner (Part Number: Not Available)
- Span Adjustment: Adjustment component for span (Part Number: Not Available)
- Cam: Cam component of the positioner (Part Number: Not Available)
- Actuator Stem: Stem component of the actuator (Part Number: Not Available)
- Inner Actuator Chamber: Inner chamber of the actuator (Part Number: Not Available)
- Outer Actuator Chamber: Outer chamber of the actuator (Part Number: Not Available)
- Bellows: Bellows component of the positioner (Part Number: Not Available)
- Zero Adjustment: Adjustment component for zero (Part Number: Not Available)
- Flapper: Flapper component of the positioner (Part Number: Not Available)
- Left Poppet: Poppet component of the positioner (Part Number: Not Available)
- Feedback Springs: Springs for feedback mechanism (Part Number: Not Available)
Product Specs Sheet
- Category: Double Acting / Single Acting Pneumatic
- Input Signal: 3-15 psig (0.2 – 1.0 barg)
- Supply Pressure: 20-100 psig (1.4 – 7.0 barg)
- Stroke: 0 to 90°
- Air Connection: 1/4″ NPTF
- Gauge Connection: 1/8″ NPTF
- Protection: IP66
- Cam: Linear & Optional Reverse Acting
- Ambient Temperature Ranges: Std. = -4°F to +158°F (-20°C to +70°C), High = -4°F to +248°F (-20°C to +120°C), Low = -40°F to +158°F (-40°C to +70°C)
- Linearity: ±2.0% Full Scale (F.S.)
- Hysteresis: ±1.0% Full Scale (F.S.)
- Sensitivity: ±0.5% Full Scale (F.S.)
- Repeatability: ±0.5% Full Scale (F.S.)
- Air Consumption: .1 Acfm (1.4 LPM) @ 20 psia (1.4 barA), .39 Acfm (11 LPM) @ 60 psia (4 barA)
- Flow Capacity: 2.8 Acfm (80 LPM) @ 20 psia (1.4 barA), 7.1 Acfm (200 LPM) @ 60 psia (4 barA)
- Housing Material: Die-cast Aluminum, Powder-coated
- Weight: 3.7 lbs (1.7 kg)
Troubleshooting
- Positioner does not respond to input signal:
- Check supply pressure to the actuator
- Check if input signal is properly supplied to the positioner
- Check if the nozzle has been blocked
- Check if feedback shaft has been adjusted properly
- Pressure of OUT 1 reaches exhausting pressure level and does not come back down:
- Check Auto/Manual (A/M) switch and ensure it is in the ‘A’ position
- Check for a gap or damage between the nozzle and the flapper
- Hunting occurs:
- Check if feedback springs have been displaced
- Install an output orifice for OUT 1 and OUT 2 if positioner is attached to a very small capacity actuator
- Actuator only operates Open or Closed:
- Check tubing connection
- Check cam direction
- Linearity is too low:
- Check if Zero and Span have been properly adjusted
- Check if supply air pressure level is stable from the regulator
Please
note that any procedure, checklist, or other document available on Limble is provided for general education and
information only and does not constitute legal, medical, or financial advice. Limble makes the materials available
AS IS and AS PROVIDED, without warranties of any kind. By downloading or using any such materials, you assume the
risk that they may not be appropriate for your specific situation and agree that you are solely responsible for any
such use, including compliance with applicable law and with meeting any conditions of product warranties. It is
recommended to contact OEM for the most accurate information.
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