Brochure

52
Regulators
Weight
Part (Approx.)
Model Number lbs. (kg)
Well, Copper 405529 1 (.5)
Well, SS 405532 3 (1.4)
The Series STPA Self-Contained Temperature pilot valves
are designed for applications such as steam to water
converters, domestic hot water, manufacturing process, or
Series STPA Self-Contained Temperature Control Pilots
Well for Series STPA
• Lightweight, compact size prevents strain on mounting pipes
• Easy temperature adjustment with calibrated dial
• Fast, easy installation
• Non-metallic, lockable temperature adjustment knob
• Tight shut-off provided by hardened stainless steel plug
and seat
• Packless construction eliminates seals that wear out
and leak
• Removable strainer helps prevent debris from
entering pilot
• Bulb overheat protection up to 100°F (55.6°C)
• Durable
1
⁄2" (15mm) NPT copper bulb with standard
10 ft. (3m) armored capillary (other lengths available)
• Optional Wells:
– Copper
– Stainless Steel
• Accuracy of control ± 10°F (± 5.6°C) with system recirculation
• Maximum temperature 450°F (232°C)
• Maximum operating pressure 250 psig (17.3 bar)
Note: These wells are only for use with Self-Contained Temperature Pilots.
Ordering Information
Self-Contained Temperature Pilots (Optional wells must be ordered separately)
Ordering Information
Wells
Capillary Maximum
Model Part Temperature Length Pressure Weight
Number Number Range °F (°C) ft. (m) psig (bar) lbs. (kg)
STPA-200 400866 50–200 (10–93) 10 (3) 250 (17.3) 6 (2.7)
STPA-200 400868 50–200 (10–93) 15 (4.6) 250 (17.3) 6 (2.7)
STPA-200 400869 50–200 (10–93) 20 (6.1) 250 (17.3) 6 (2.7)
STPA-200 400874 50–200 (10–93) 25 (7.6) 250 (17.3) 6 (2.7)
STPA-200 400875 50–200 (10–93) 30 (9.1) 250 (17.3) 6 (2.7)
STPA-300 400880 150–300 (66–149) 10 (3) 250 (17.3) 6 (2.7)
STPA-300 400881 150–300 (66–149) 15 (4.6) 250 (17.3) 6 (2.7)
STPA-300 400884 150–300 (66–149) 20 (6.1) 250 (17.3) 6 (2.7)
STPA-300 400889 150–300 (66–149) 25 (7.6) 250 (17.3) 6 (2.7)
STPA-300 400890 150–300 (66–149) 30 (9.1) 250 (17.3) 6 (2.7)
STPA-400 400892 250–400 (121–204) 10 (3) 250 (17.3) 6 (2.7)
1
⁄2" (12.7mm)
3
⁄8"
(9.5mm)
12
1
⁄4"
(311mm)
Signal
1
⁄2" NPT
9
3
⁄4"
(248mm)
Inlet
10
5
⁄8"
(270mm)
Stainless Steel–11
11
⁄
32" (280mm)
Copper–11
3
⁄
16" (284mm)
Stainless Steel–12
7
⁄8" (327mm)
Copper–12
7
⁄16" (316mm)
Materials of Construction
Part Specifications
Body Steel ASTM A108
Plug Stainless Steel ASTM A582
Seat Stainless Steel ASTM A582
Brass Components CDA 360 ASTM B16
Tubing Copper ASTM B75
Springs Stainless Steel ASTM A313
Strainer Stainless Steel ASTM A240
Gasket Copper ASTM B152
others that require accurate temperature control of heated
fluids.
Pressure and/or Temperature Pilot Operated Steam Regulators(continued)
Hoffman Specialty
®
RegulatorsHoffman Specialty
®
Regulators