Control Products T124 User Manual
SELECTING TEMP.
PILOTS
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SELECTING TEMPERATURE PILOTS
Any of the Main Valves described in the Main Valve Section can
be combined with any of the Pilots listed below, to produce the
SPENCE Temperature Regulator. This Regulator is designed to
control the flow of fluid to a heating or cooling element so as to
maintain a constant, adjustable, precise predetermined temperature. Pilots fully stroke valve within 5°F. The table below lists
the principal Temperature Pilots.
The Thermostats of these SPENCE Pilots are of the Vapor
Tension Type. They are ruggedly constructed and will not be
injured by overheating.
These SPENCE T emperatur e Pilots can be furnished with 150°F
range of temperature adjustment on special order. It should be
noted that since heavier Adjusting Springs are required for this
greater range the regulation will not be quite so accurate.
TEMPERATURE RANGES
20°F to 120°F 150°F to 300°F Thermostats can be furn50°F to 150°F 170°F to 270°F ished for temperatures
70°F to 170°F 250°F to 350°F higher than 350°F on
120°F to 220°F special order.
HEATING CONTROL Single Pilot Types T134 and Combination Pilot Type T14D2 reduce the steam pressure as well as
regulate the output temperature. A choice should be made
according to the maximum required delivery pressure, i.e., the
pressure needed in the heater to carry the peak load. Pilot
Types T14D and T14D2 in cast steel are designed for initial
steam pressures in excess of 500°F.
Of the Air Control Pilots, the Type T61 is the general choice.
The Type T60 is used for temperature indication or for remote
adjustment. The required heater pressure will determine the
choice of the A Series Pilot. See Product Pages.
COOLING CONTROL Pilot Type T52 is employed With Type
E or C Series Main Valves to control temperature by regulating
the flow of a cooling medium. This Pilot opens the Main Valve on
rising temperature and exercises no control over the delivery
pressure. The Air Control Pilots can be furnished with increasing
air signal on temperature rise for use in cooling control.
TEMPERATURE RANGESSelection of the following ranges of
temperature adjustment is recommended for the services noted:
50°F to 150°F Room or air duct control
120°F to 220°F Domestic or laundry hot water service.
70°F to 170°F Fuel oil preheating.
170°F to 270°F Fuel oil heating.
Type Service Conditions Operating Characteristics Main Valve
Cast Iron Cast Bronze
a
Cast Steel
Delivery
Maximum Maximum Maximum Maximum Maximum Maximum
Pressure
Initial Temper- Initial Temper- Initial Temper-
Pressure ature Pressure ature Pressure ature Maximum
psi °F psi °F psi °F psi
T134 250 450 — — 600 750 20
Cascade Control–Closes on rise in temperature–controls delivery pressure–decreases
E or C Series
T124 250 450 ———— 125
delivery pressure as temperature increases
& vice versa–spring loaded pressure control.
T14 250 450
——
600 750 — Closes on rise in temperature. E or C Series
T14D 250 450
——
600 750 150
Closes on rise in temperature–controls
delivery pressure at predetermined setting–
E or C Series
T14D2 250 450 — — 600 750 300
spring loaded pressure control
T52 250 450
——
— — — Opens on rise in temperature. E or C Series
Safety
Pilot
— — 300 500 — — — Prevents excessive temperature rise.
E or C Series
a
Bronze Body Pilots are recommended for water service.
* Rising output pressure on falling temperature. This action applied to an EA Series Regulator increases steam flow with decreasing
temperature. Direct action available for cooling control.
**Rate or reset available on application ***Other ranges on application 1Type 304 2Type 347 or optional Type 316
TEMPERATURE
REGULATOR PILOTS
AIR CONTROLLED TEMPERATURE PILOTS
NOTES ON SELECTION OF PILOTS
SPENCE Air Control Pilots, listed below, have been developed
to meet special conditions when used in conjunction with A
Series Pressure Pilots. The fast bi-metal thermostats have a
200°F adjustable range and protection against damage from
over-heating. By cascading an air signal onto a pressure regulator , the EAT Series temperature control reduces steam pressure
to an adjustable limit as well as regulating output temperature.
Bulb Bulb Bulb Range Maximum Bulb Control Action
Type Style Material Mounting °F Temperature °F Mode
No.736 Bronze
1
/2 NPT 50-250 350 Proportional Reverse*
T61
No. 737 St. Stl.
1
1
/
2 NPT 50-250 350 Proportional Reverse*
Sanitary
T64 No. 738 St. Stl.
1
Thermometer
50-250 350 Proportional Reverse*
Bushing
1
/2NPT
30-150 180 Proportional Reverse*
T60 No.745 St. Stl.
2
Union
100-300*** 350 Proportional Reverse*
Mounted
SIZING TEMPERATURE REGULATORS
DATA
REQUIRED FOR ORDERING
1. SERVICE
(a) Fluid flowing though Regulator.
(b) Type heater to be controlled.
2. INITIAL (INLET) PRESSURE
(a) Maximum/Minimum.
(b) Superheat, Gravity, etc.
(1) Steam Service–Total Temperature or Degrees
Superheat, if any.
(2) Air, Gases, Water and Liquids–Temperature and
Specific Gravity.
3. DELIVERY (OUTLET) PRESSURE Maximum required on
heater.
4. CAPACITY Maximum required flow through Regulator or
the following data leading to same:
(a) Quantity and type of fluid to be heated or cooled.
(b) Temperature rise or drop, °F.
5.THERMOSTAT CHARACTERISTICS:
(a) Controlled Temperature, °F–Maximum/Minimum.
(b) Operation–Open or Close on temperature rise.
(c) Thermostat Bulb–Style Number and Material.
(d) Flexible Tubing–Length and Material.
6. END CONNECTIONS Screwed or Flanged. (If flanged,
state drilling)
S
ELECTION OF TYPE AND SIZE OF REGULATOR
MAIN VALVE
A. TYPE —See Selection Criteria
for Steam, Air, Gases or Water
and Liquids in beginning of this
Section.
B. SIZE—See applicable Valve
Capacity Tables in this Section.
C. MATERIAL— See Main Valve
Selection Chart in Technical
Reference Section or individual
Product Pages.
D. ACCESSORIES—See Accessories in Other Products
Section.
EXAMPLE
Select size and type Regulator for heating 120 gpm water from
50°F entering temperature to 170°F final temperature in an
instantaneous heater. Steam supply at 125 psi pressure to be
reduced to 30 psi maximum in heater.
1. (a) Steam
(b) Instantaneous
2. (a) 125 psi
(b) None (saturated, 353°F total temperature)
3. 30 psi
4. See Capacity Tables in this Section.
(a) 120 gpm water.
(b) 170-50 = 120°F Rise
120
x 120 = 7200#/Hr.
2
5. (a) 170°F–Select standard Temperature Range from facing
page to include this final temperature.
(b) Close on temperature rise.
(c) Style No. 700 bronze. (See Options Section)
(d) Ten (10) feet, brass–fur nished unless otherwise specified.
6. Flanged, if 2
1
/2" size or larger.
S
ELECTION OF T
YPE AND SIZE OF REGULATOR
MAIN VALVE
A. Since maximum Delivery
Pressure is less than 75%
of minimum Initial Pressure
and the least pressure drop
exceeds required “minimal
differential”.
SELECT TYPE E
B. Using Capacity Tables in
this Section, for 7200#/Hr
and 125 psi initial pressure
SELECT 2" FULL PORT
C. For 125 psi, 353°F:
SELECT CAST IRON,
NPT 250
D. None required in this case.
PILOT
Since maximum Initial
Pressure 125 psi, Total
Temperature 353°F
maximum Delivery
Pressure 30 psi
SELECT TYPE T124
For 125 psi, 353°F:
SELECT CAST IRON
None required in this case.
PILOT
See Selection Criteria
and Selection Charts
opposite.
See Pilot Selection
Chart opposite or individual Product Pages.
ECONOMICAL SOLUTION: 3" SPENCE TYPE ET124, CAST IRON BODY, NPT 250 ENDS
TEMPERATURE RANGE 120-220°F EQUIPPED WITH 10 FEET OF BRASS FLEXIBLE TUBING
AND STYLE NO. 700 BRONZE THERMOSTAT BULB.
Temperature Regulators should always be protected by properly designed Strainers.
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SIZING TEMPERATURE
REGULATORS
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