Brochure

Tunstall Corporation
118 Exchange Street • Chicopee, MA 01013
© July 2014
We reserve the right to alter designs, specifications and information without notice.
Phone [phone] · Fax [phone]
www.tunstall-inc.com • www.maconcontrols.com
Bulletin-EKV-0714
Valves
COOLING VALVE
EKV 20
Areas of use
The EKV valves are designed for use in refrigera-
tion plants, induction or fan coil units where the
flow of cold water through the heat exchangers
can be regulated to obtain constant differentiated
temperatures in different parts of the building.
Function
The sensor medium of a thermostat component
expands with rising temperature. The expansion
is transmitted to the valve spindle and conus,
opening the valve to permit flow of coolant. A
return spring in the valve body closes the valve
when the pressure on the spindle is relieved. The
valve will be balanced so that the plug comes to
rest in a given position, passing a given flow of
coolant. Any change in the temperature at the
sensor bulb causes a change in the position of the
plug and thus increases or reduces the flow. The
desired temperature is set by adjusting the regula-
tion knob on the thermostat.
Features
 Compact dimensions
 Forged brass valve
 Actuators can be changed without draining
the system
 Stainless steel spindle
 Shipped with protective cap that may be used
for controlling cooling during construction
period
 Easy, one-trade installation
 Replaceable insert
 Prevents over- and under-cooling
 Accessories available for proper mounting of
 sensor in circulating air for good sensing
function
 24 Volt electric or non-electric t’stats avail-
able
 Provides constant temperature
EKV15 - 1/2” EKV20 - 3/4”
Max. Static Pressure 145 PSI 145 PSI
Cv - Value 1.8 2.75
Fittings
1/2 Union Sweat 3/4 Union Sweat
O.A. Length w/Fittings 4-1/2” 5”
Weight 6 oz 8 oz
Height Less Operator 2-1/8” 2-1/8”
Technical Data