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P47 Series
Steam Pressure Limit Control
Description
The P47 controls are available with SPST, DPST, or
4-wire, two-circuit contacts for line voltage or low voltage. The pressure
connector is 1/4 in. male NPT (0-15 psig only) or 1/4 in. female NPT (for all
other ranges).
Applications
P47 steam pressure controls are designed for high limit or
operating control applications. A typical use is as a limit control on
steam heating systems. Models that close on a pressure increase are used
on steam unit heaters to avoid blower operation when steam pressure is below the
point required for adequate heating. The P47 can be used with steam,
water, air, or noncombustible gases that do not harm iron or copper.
Features
- long-life contact structure with high contact force
- easy-to-adjust single sight set scales show both
cut-in and cut-out settings
- compact size
- trip-free manual reset
Accessories
The Part No. TBG16A-600R Siphon is supplied with all
controls except models with 0 to 15 psig range.
Electrical Ratings
P47AA and P47BA
|
Motor Ratings VAC |
120 |
208 |
240 |
277 |
|
AC Full Load Amp |
16.0 |
9.2 |
8.0 |
- |
|
AC Locked Rotor Amp |
96.0 |
55.2 |
48.0 |
- |
|
AC Non-Inductive Amp |
16.0 |
16.0 |
16.0 |
16.0 |
|
Pilot Duty - 125VA, 120 to 600 VAC; 57.5 VA, 120 to 300
VDC |
P47GA
|
Pole Number |
Line-M2 (Main) |
Line-M1 (Auxiliary) |
|
Motor Ratings VAC |
120 |
208 |
240 |
277 |
120 |
208 |
240 |
277 |
|
AC Full Load Amp |
16.0 |
9.2 |
8.0 |
- |
6.0 |
3.3 |
3.0 |
- |
|
AC Locked Rotor Amp |
96.0 |
55.2 |
48.0 |
- |
36.0 |
19.8 |
18.0 |
- |
|
AC Non-Inductive Amp |
16.0 |
9.2 |
8.0 |
7.2 |
6.0 |
6.0 |
6.0 |
6.0 |
|
Pilot Duty: Both Poles 125 VA, 120 to 600 VAC; 57.5 VA,
120 to 300 VDC |
Selection Chart
|
Code Number |
Number of Poles |
Range psig (kPa) |
Differential psig (kPa) |
Max Over-Pressure psig (kPa) |
|
Min |
Max |
|
Contacts Open On Rise Automatic Reset |
|
P47AA-1C |
1 |
0 to 15 (0 to 103) |
2 (14) |
8 (55) |
50 (345) |
|
P47AA-4C |
1 |
20 in. Hg to 50 (-68
to 345) |
5 (34) |
35 (241) |
180 (1241) |
|
P47AA-13C |
1 |
0 to 150 (0 to 1034) |
12 (83) |
50 (345) |
325 (2241) |
|
Contacts Close On Rise Automatic Reset |
|
P47BA-1C |
1 |
0 to 15 (0 to 103) |
2 (14) |
8 (55) |
50 (345) |
|
P47BA-6C |
1 |
0 to 150 (0 to 1034) |
12 (83) |
50 (345) |
325 (2241) |
|
4-Wire Two Circuit1
Automatic Reset |
|
P47GA-9C1 |
Main Open High; Auxiliary Open Low |
0 to 150 (0 to 1034) |
12 (83) |
50 (345) |
325 (2241) |
1. The main contacts (Line-M2)
open on rise, as the auxiliary contacts (Line-M1) close.
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