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Eclipse Ratio Regulator, V1, Instruction Manual 742, 5/1/2009
Introduction
Product Description
The ES-Series Ratio Regulators are used in applications
where gas to air proportional flow is required. The gas flow
is controlled as a function of the air pressure through a
loading line which connects into the top of the regulator.
As the system air pressure increases, it forces the ratio
regulator valve to open causing the outlet pressure to
increase until the two pressures balance. As the load line
pressure increases, the ratio of the outlet pressure to the
load line pressure will be slightly less than 1:1.
The ratio regulators have a bias adjustment for varying the
gas flow when setting the burner at low fire. It can be used
to increase or decrease the gas flow resulting in gas rich
or lean combustion. The adjustment is restricted in the
gas rich direction therefore limiting the gas flow at zero air
pressure.
■ The ratio regulators are control valves only and
cannot be used as gas shut-off valves.
Figure 1.1. Ratio Regulators
Product Features
The ratio regulators are designed to optimize performance
as ambient temperature and inlet pressure vary. Features
include:
• UL recognized and CE approved for natural gas,
propane, and butane.
• Valve seat design for consistent low fire
repeatability.
• Balanced double diaphragm design allows regulator
to operate over a wide range of inlet pressures while
minimally affecting outlet pressure.
• Rugged die cast aluminum housing.
• Corrosion resistant internal components.
• Synthetic rubber diaphragms for excellent low
temperature performance.
• Inlet pressure tap with connector (1-1/2", 2" & 3"
NPT (Rp) models only).
Audience
This manual has been written for people who are already
familiar with all aspects of a combustion system and its
add-on components, also referred to as “the burner
system”.
The audience is expected to have had experience with the
ratio regulator component of a burner system.
Purpose
The purpose of this manual is to make sure that the ratio
regulator component of a burner system is used in a safe,
effective and trouble free manner.
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