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This Series 1140 regulator automatically controls the flow of steam, water or other medium passing through its valve by responding to temperature changes at the bulb. The bulb contains a liquid which vaporizes when heated. Vapor pressure generated in bulb is transmitted through the capillary tubing to the flexible bellows which moves the valve disc or plunger controlling the flow of the medium through the valve. Movement of the bellows is opposed by a spring, providing a means of adjustment. The regulator only controls within the temperature range stamped on the name plate and can be adjusted to control at any point within its range.
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