V50AB-1C Johnson Controls MODULATING Valve

Overview

The Johnson Controls V50AB-1C is a self-operated, temperature-actuated modulating valve designed to regulate the flow of gas on natural or LP gas-fired outdoor crop dryers. It functions autonomously without the need for external electrical power or wiring, using a vapor pressure sensing element to modulate gas supply to the main burner in response to temperature changes at the sensing bulb, thereby maintaining a consistent air drying temperature.

Features

• Mechanical Autonomy: Operates as a self-contained temperature regulator, eliminating the need for electrical actuators or external wiring.
• Fast, Uniform Response: Designed with a simplified mechanism ensuring the free movement of internal components for precise modulation.
• Simple Setpoint Calibration: Features an integrated “T” handle range screw on top of the spring housing for straightforward on-the-fly adjustments.
• Built for Exposed Conditions: Constructed with a durable brass body and robust high-temperature diaphragms suitable for outdoor environments.
• Internal Bypass Capability: Features a threaded hole in the internal web, allowing for the installation of field-selectable bypass orifices to maintain a minimum flame when the close-off point is reached.

Specifications

• Valve Size: 1/2 inch
• Connection Type: FNPT (Female National Pipe Thread)
• Temperature Range: 90°F to 210°F (32°C to 99°C)
• Maximum Line Working Pressure: 30 psig (207 kPa)
• Capillary and Bulb Style: 10 feet armored capillary with an 11/16 in. x 10 in. air bulb
• Body Material: Brass

Applications

• Outdoor crop dryer service, including portable grain dryers and storage grain bins.
• Regulation of natural or LP gas manifolds to prevent temperature fluctuations and optimize thermal processing parameters.
• Vapor or liquid withdrawal systems utilizing a direct or indirect vaporizer (not intended for use as an expansion valve on straight liquid withdrawal lines).