Product Overview

V5013B,C,F THREE-WAY MIXING AND DIVERTING VALVES
60-2129—4
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Fig. 10. Mounting of flanged valve bodies.
NOTE: For V5013F and B, if the pressures in the pipe lines
at inlets A and B are unequal, a balancing cock may
be installed in the line carrying the higher pressure.
Best possible modulation will be obtained if this cock
is adjusted under actual operating conditions so that
pressures A and B are equal at midstroke.
OPERATION
Mixing and Diverting
It is important to understand the differences between mixing
valves (V5013B,F) and diverting valves (V5013C). When
applied to valves, the terms mixing and diverting do not
always carry the same connotation as when applied to
applications. Namely, a mixing application does not always
use a
mixing valve . The type of valve used is dependent upon
the piping of the application.
Valves
A mixing valve receives input flow at two ports, and
discharges the mixed flow at the third port. A diverting valve
receives input flow at one port, and diverts the flow to one of
two output ports.
IMPORTANT
V5013 Valves should not be piped backwards.
Applications
The terms diverting application and mixing application do not
always clearly define the appropriate V5013. The proper
V5013 depends on the valve piping. One example of this is
the coil bypass application (see Fig. 7 and 8). A diverting
valve installed upstream of the coil determines the flow
through the coil (see Fig. 7). This is functionally the same as a
mixing valve installed downstream of the coil directing water
from either the coil or the bypass to the return piping (see Fig.
8). Almost all new installations can use a V5013B,F Mixing
Valve, given an appropriate mixing valve piping arrangement.
CHECKOUT
It is important to check the valve stem to see that it operates
freely. Impaired valve stem operation may indicate that the
body was twisted by faulty piping or the stem was bent by
rough handling. Either of these conditions may warrant
replacement of the valve body or other components.
The valve should be checked at regular intervals for leakage
around the packing. The packing is spring-loaded and should
seldom require attention. If leakage is discovered and
inspection shows that the packing gland is screwed down
tightly, the valve must be repacked.
IF POSSIBLE, MOUNT COMPANION FLANGE ON PIPE BEFORE
MOUNTING FLANGE ON THE VALVE.
DO NOT APPLY PIPE DOPE TO VALVE FLANGE, COMPANION
FLANGE OR GASKET.
BE SURE FACE OF COMPANION FLANGE IS FLUSH WITH FACE
OF VALVE-BODY FLANGE AND ALIGNED SQUARELY BEFORE
TIGHTENING MOUNTING NUTS.
M11764
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