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1. GENERAL PRODUCT INFORMATION
1.1 Principle of operation
1.1.1 The Power Flame K7 metering valve is listed and labeled by Underwriters Laboratories, Inc. for use
with #2 fuel oils at a maximum pressure of 300 PSI. This valve is available in different models to
best match to the desired fluid flow rate for the application. It is unique in that it can rotate CW or
CCW, offering a wider variety of linkage arrangement possibilities. A graduated dial and pointer is
provided as reference to the physical position of the flow metering mechanism. Full flow is reached
at the “OPEN” position. Flow decreases as the dial moves toward the “CLOSED” position. This
valve is not intended to replace a safety shutoff valve.
1.2 Model Identification
1.2.1 All metering valve model numbers begin with K7-.
1.2.2 The numeric value immediately following the model number designates the valve body size which
corresponds to its diameter in inches (3 = 3”).
1.2.3 The numeric value immediately following the valve body size indicates the maximum flow at full
open position with a 25 PSIG pressure drop across the valve. This value is factory-stamped onto
the label. The values listed below are in gallons per hour (GPH).
a. -0 = 4
b. -1 = 14
c. -2 = 23
d. -3 = 34
e. -4 = 47
f. -5 = 63
g. -6 = 133
h. -7 = 176
i. -8 = 230
1.2.4 Any subsequent suffixes (such as A, B, etc.) to the model number are reserved for future use
(consult factory).
