Description
Technical Specifications
- Product Model: 38B5786X052
- Brand: Fisher (Emerson)
- Warranty: One Year
- Product Type: Relay Assembly (Relay A, Double-Acting)
- Compatible Device: FIELDVUE DVC6000 / DVC6200 Digital Valve Controller
- Operating Temperature: -40°C ~ +85°C
- Storage Temperature: -50°C ~ +90°C
- Response Time: Fast pneumatic signal amplification for valve positioning
- Protection Class: Internal module, protected within positioner housing
- Accuracy Class: Stable proportional pneumatic output for precise valve stroke control
- Supply Medium: Clean, dry instrument air
- Rated Pressure Range: 1.4–10 bar instrument air supply
- Communication Interface: Internal pneumatic connection to I/P converter
- Supported Actuator Type: Double-acting pneumatic valve actuators
- Overload Capacity: Built-in surge protection against pressure spikes
- Dimensions: Compact form factor designed for internal mounting inside DVC6000 / DVC6200
Product Overview
The Fisher 38B5786X052 is a Type A double-acting pneumatic relay assembly, an original internal spare component engineered for Emerson Fisher FIELDVUE DVC6000 and DVC6200 digital valve controllers. This pneumatic relay amplifies low-volume control signals from the I/P converter and delivers bidirectional air pressure to both sides of double-acting valve actuators. It eliminates slow actuator response and hunting caused by insufficient air flow, maintaining steady valve stroke positioning under dynamic process load variations. Instrument technicians, process control engineers and valve maintenance specialists rely on this assembly for reliable throttling control of critical process valves. Plug-in internal design simplifies on-site replacement without full positioner disassembly. It maintains consistent pneumatic gain and meets strict industrial EMC and process control standards for refineries, chemical plants and power facilities.
Application Scenarios
- Oil & Gas Refinery Process Control Valves: Matched with double-acting actuator control valves for distillation, separation and pipeline flow regulation. Delivers fast balanced pneumatic actuation for safety-relevant process loops.
- Chemical Plant Continuous Production Loops: Installed within DVC6200 positioners on reactor, heat exchanger and feed control valves. Precise stroke control stabilizes temperature, pressure and flow setpoints.
- Power Plant Steam & Water Control Valves: Used for boiler feed, condensate and flue gas damper control valves. Optimized air flow ensures rapid response during load fluctuation and unit transient conditions.
- DVC6000 / DVC6200 Positioner Maintenance & Retrofit: OEM spare replacement for faulty internal relays. Direct drop-in fit reduces equipment downtime during valve overhaul and preventative maintenance cycles.
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