Bently Nevada 165855-15-CN Cylinder Pressure Transducer for Reciprocating Compressors

Product Introduction

When reciprocating compressor cylinder pressure readings drift or sensors fail due to harsh conditions, the Bently Nevada 165855-15-CN Cylinder Pressure Transducer provides a reliable solution. Designed for continuous monitoring of cyclic absolute pressure changes inside compressor cylinders, this transducer forms an integral part of a Reciprocating Compressor Condition Monitoring and Asset Management System when paired with the 3500/77M Cylinder Pressure Monitor and System 1 Plant Asset Management Software. The 165855-15-CN features a patent-pending design that maintains accuracy even after extended cycling over large pressure gradients, and it withstands over-pressure upsets without diaphragm degradation.

Technical Specifications Breakdown

The 165855-15-CN operates with a power supply of 18 to 30 Vdc and draws less than 15 mA maximum current. Its frequency response covers 0 Hz to 5500 Hz ± 1 dB, enabling capture of rapid pressure fluctuations. The pressure range option for this specific model is 0 to 172 bar (0 to 2,500 psia) with armor. The transducer weighs 0.4 Kg, making it compact yet robust for industrial mounting. The agency approval option is CN for country-specific approvals, ensuring compliance with local standards.

Industry Applications

This transducer excels in reciprocating compressor monitoring for oil and gas, petrochemical, and chemical processing plants. In natural gas compression stations, the 165855-15-CN delivers accurate pressure data to detect valve leaks, ring failures, or cylinder loading issues. For hydrogen sulfide service, the Hifluor O-ring option provides compatibility with aggressive media. The sensor head withstands temperatures up to 150 °C (302 °F), allowing installation directly on hot compressor cylinders. By integrating with System 1 software, operators gain real-time insights to optimize maintenance schedules and reduce unplanned downtime.

Installation & Setup Guidance

Mount the transducer into an isolation valve or pressure indicator port on the compressor cylinder. A special adapter, such as the 166393 adapter, ensures a proper seal between the port and the transducer. The electronics housing is separated from the wetted sensor head by 1 metre of cable; secure the electronics near the compressor for optimal performance. Apply a mounting torque of 68 N-m (50 lbf-ft) to the 7/8-14 UNF thread. For moisture-prone environments, the IP67-rated body and NEMA 4X design protect against water ingress, but ensure the connector remains dry.

Maintenance & Reliability

The robust C-276 and 316L stainless steel construction resists corrosion in harsh chemical environments. The gold-plated wetted surface, per MIL-G-45204 Type III Grade A, minimizes contamination and ensures consistent readings. Inspect O-rings periodically for compatibility with the process media: Hifluor (black) for hydrocarbons and natural gas, Ethylene Propylene (purple) for ammonia-based media. The transducer automatically recovers from over-pressure events up to 1.5 times full scale (proof pressure), with burst pressure at 3 times full scale (2 times for 689 bar/10,000 psia units). Regular calibration checks every 12 months are recommended to maintain accuracy.

Selection Guide & Purchasing Advice

Before ordering the 165855-15-CN, verify the pressure range matches your application: this model covers 0 to 172 bar (0 to 2,500 psia) with armor. Confirm the O-ring material compatibility with your process media. The CN agency approval option is suitable for country-specific requirements. For complete technical specifications, please contact BluePLC Industrial. We stock genuine Bently Nevada parts and can assist with cross-referencing existing transducer models.