Bray Series 55 5-micron filter regulator for compressed-air filtration and pressure regulation, compatible with supply air branches for 6A and 6P positioners. The unit has a set pressure range of 7–125 PSIG and features 1/4" NPT or G 1/4 inlet and outlet ports. It is suitable for upstream air preparation for positioners, reducing the likelihood of contaminants entering internal air passages.
Series 55 Filter Regulator Product Image
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Bray Series 55 5-Micron Filter Regulator for 6A and 6P Positioners
5-micron filter regulator for pneumatic positioner air supply pre-treatment, supporting 1/4-inch connections.
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Specifications
- Filtration Rating
- 5 Micron (5 Micron Standard)
- Set Pressure Range
- 7 – 125 PSIG (0.05 - 0.85 MPa / 0.5 - 8.6 Bar)
- Maximum Rated Pressure
- 0 – 250 PSIG (0 - 17.2 bar / 0 - 1.70 MPa)
- Standard Rated Flow
- 30 SCFM (measured at 100 psig inlet pressure, 90 psig no-flow secondary setting, and 10 psig pressure drop)
- Operating Temperature Range
- 32°F - 175°F (0°C - 80°C)
- Inlet and Outlet Port Threads
- 1/4" NPT or G 1/4
- Pressure Gauge Port Thread
- G 1/8
- Valve Body Material
- Zinc Alloy (Zinc)
- Filter Bowl Material
- Clear polycarbonate (standard); metal zinc alloy with sight glass (optional)
- Filter Bowl Capacity
- 2 Ounce
- Mounting Method
- Stainless steel wall-mount bracket or panel-mounted threaded fastening
Application scenarios
Bray Series 6A Smart Positioner Air Supply Pretreatment
Installed on the compressed-air supply branch to the Bray Series 6A positioner, it uses 5-micron nominal filtration to remove solid and liquid contaminants and regulates downstream supply pressure, reducing the likelihood of contaminants entering the positioner's internal air passages.
Bray Series 6P Pneumatic Positioner Air Supply Pretreatment
Installed on the compressed-air supply branch upstream of the Bray Series 6P positioner, it uses 5-micron nominal filtration to remove solid and liquid contaminants and regulates downstream supply pressure, providing the positioner with filtered and pressure-reduced compressed air.
Selection points
5-Micron Filtration and Pressure Regulation for 6A and 6P Positioners
Provides 5-micron nominal filtration and pressure regulation. The documentation specifically recommends use with Bray 6A and 6P positioners to reduce the impact of compressed-air contaminants on the positioner's internal pneumatic circuits.
Transparent and Metal Filter Bowl Options
Supplied standard with a transparent polycarbonate filter bowl, with an optional zinc alloy metal filter bowl with sight glass. Select based on site requirements for bowl material and visual inspection.
Compatible with Wall-Mount and Panel-Mount Installation
Supports installation using a stainless steel wall-mount bracket and panel mounting via threads, facilitating adaptation to different equipment layouts.
Installation & maintenance notes
Do Not Connect to High-Pressure Compressed Gas Cylinders
Do not connect this filter regulator to high-pressure compressed gas cylinders. Supply pressure must not exceed the product's maximum rated pressure of 250 PSIG (17.2 bar/1.70 MPa).
Verify Pressure Gauge Port Thread Specification
When installing a pressure gauge, verify that the port specification is G1/8 and use a matching threaded connection. Do not force installation with incompatible threads.
Frequently Asked Questions
What is the operating principle of the Series 55 filter regulator?
The Series 55 first filters the air supply and then regulates the pressure. Three coordinated steps provide stable downstream pressure output. The 5-micron filter element removes solid particles and liquid contaminants, ensuring clean air for downstream pneumatic equipment.
What applications are suitable for this valve's set pressure range?
The set pressure range is 7–125 PSIG, making it suitable for pneumatic control applications requiring stable control of low- to medium-pressure air supplies. The specific configuration must be confirmed according to the actual model and application conditions.
What are the key points for Series 55 connections and installation?
Pressure ports are available with 1/4" NPT threads or G1/4 metric threads, while the pressure gauge port is G1/8. Optional stainless steel wall-mount brackets or panel mounting are available for convenient installation in accordance with common piping standards.
What is recommended when using it with positioners?
Use with Series 6A or Series 6P pneumatic positioners is strongly recommended to prevent small contaminants from clogging the positioner air passages, improving overall control accuracy and reliability.
What maintenance features does this filter regulator offer?
The filter bowl features a quick-release locking design for easy removal, cleaning, and replacement of the 5-micron filter element. Its transparent design allows on-site monitoring of moisture accumulation and liquid level, while a metal guard provides protection. Refer to the on-site operating manual for specific maintenance details.