Features & Benefits
Easy handling and installation
Very low weight and small overall proportions.
Precise and stable differential pressure control
Unrivaled accuracy thanks to the new PILOT technology.
Measuring and system diagnostics
Unique features to validate and better understand system behavior to minimize energy consumption.
Technical Information
Application:
Heating and cooling systems.
Installation in the return pipe.
Functions:
Differential pressure control
Pre-setting Δp over the load (ΔpL)
Measuring (ΔpL)
Dimensions:
2 1/2" - 8"
Pressure class:
Class 150
Max. differential pressure (ΔpV):
174 psi
Setting range:
1* - 7 psi
4* - 21 psi
12* - 58 psi
*) Delivery settings
Leakage rate:
Tight sealing
Temperature:
Max. working temperature:
- with measuring points, standard: 248 °F
- with measuring points, double secured: 302 °F
Min. working temperature: 14 °F
Media:
Water or neutral fluids, water-glycol mixtures (0-57%).
Material:
Valve body: Ductile iron EN-GJS-400-15
Pilot extension body: Brass
Pilot body: AMETAL®
O-rings: EDPM rubber
Seat seal: EPDM/Stainless steel
Plug mechanism: Stainless steel and brass
Membrane: EPDM rubber
Springs: Stainless steel
Screws and nuts: Stainless steel
AMETAL® is the dezincification resistant alloy of IMI Hydronic Engineering.
Surface treatment:
Pilot body: Non treated
Valve body: Electrophoretic painting.
Marking:
TA, IMI, Size, Class, Cvm, Tmin/max, serial number, valve body material and flow direction arrow, label, ΔpL range.
Colour identification on top of the pilot:
1 - 7 psi: Blue
4 - 21 psi: Orange
12 - 58 psi: Grey
CE-marking:
2 1/2" - 5": CE
6" - 8": CE 1370 *
*) Notified body.
Flanges:
According to ASME/ANSI B16.42 Class 150.
Articles
Flanged
Flanges according ASME/ANSI B16.42 Class 150.
3.3 ft capillary pipe (Ø0.25"), capillary pipe connection Ø0.25" x R1/4" and capillary pipe connection with shut-off Ø0.25" x G3/8" are included.
Class 150
Size | Number of bolt holes | D [in] | L [in] | H1 [in] | H2 [in] | Cvm | qmax [gpm] | lb. | Article No ** North America | Article No International |
1 - 7 psi | ||||||||||
2 1/2" | 4 | 7.09 | 7.48 | 10.7 | 3.54 | 87 | 233 | 39.7 | 23121-2411-065 | 23121-2311-065 |
3" | 4 | 7.52 | 7.99 | 11.1 | 3.78 | 127 | 343 | 46.3 | 23121-2411-080 | 23121-2311-080 |
4" | 8 | 9.02 | 9.02 | 11.9 | 4.53 | 208 | 559 | 75.0 | 23121-2411-100 | 23121-2311-100 |
5" | 8 | 10 | 10 | 12.3 | 5 | 312 | 841 | 99.2 | 23121-2411-125 | 23121-2311-125 |
6" | 8 | 11 | 10.5 | 13 | 5.51 | 462 | 1246 | 126 | 23121-2411-150 | 23121-2311-150 |
8" | 8 | 13.5 | 11.5 | 14.2 | 6.77 | 694 | 1867 | 183 | 23121-2411-200 | 23121-2311-200 |
4 - 21 psi | ||||||||||
2 1/2" | 4 | 7.09 | 7.48 | 10.7 | 3.54 | 87 | 233 | 39.7 | 23121-2421-065 | 23121-2321-065 |
3" | 4 | 7.52 | 7.99 | 11.1 | 3.78 | 127 | 343 | 46.3 | 23121-2421-080 | 23121-2321-080 |
4" | 8 | 9.02 | 9.02 | 11.9 | 4.53 | 208 | 559 | 75.0 | 23121-2421-100 | 23121-2321-100 |
5" | 8 | 10 | 10 | 12.3 | 5 | 312 | 841 | 99.2 | 23121-2421-125 | 23121-2321-125 |
6" | 8 | 11 | 10.5 | 13 | 5.51 | 462 | 1246 | 126 | 23121-2421-150 | 23121-2321-150 |
8" | 8 | 13.5 | 11.5 | 14.2 | 6.77 | 694 | 1867 | 183 | 23121-2421-200 | 23121-2321-200 |
12 - 58 psi | ||||||||||
2 1/2" | 4 | 7.09 | 7.48 | 10.7 | 3.54 | 87 | 233 | 39.7 | 23121-2431-065 | 23121-2331-065 |
3" | 4 | 7.52 | 7.99 | 11.1 | 3.78 | 127 | 343 | 46.3 | 23121-2431-080 | 23121-2331-080 |
4" | 8 | 9.02 | 9.02 | 11.9 | 4.53 | 208 | 559 | 75.0 | 23121-2431-100 | 23121-2331-100 |
5" | 8 | 10 | 10 | 12.3 | 5 | 312 | 841 | 99.2 | 23121-2431-125 | 23121-2331-125 |
6" | 8 | 11 | 10.5 | 13 | 5.51 | 462 | 1246 | 126 | 23121-2431-150 | 23121-2331-150 |
8" | 8 | 13.5 | 11.5 | 14.2 | 6.77 | 694 | 1867 | 183 | 23121-2431-200 | 23121-2331-200 |
**) Distributed by Victaulic.
Cvm = gpm at a pressure drop of 1 psi and maximum opening corresponding to the p-band.
Flanged
Flanges according ASME/ANSI B16.42 Class 150.
3.3 ft capillary pipe (Ø0.25"), capillary pipe connection Ø0.25" x R1/4" and capillary pipe connection with shut-off Ø0.25" x G3/8" are included.
Class 150
Size | Number of bolt holes | D [in] | L [in] | H1 [in] | H2 [in] | Cvm | qmax [gpm] | lb. | Article No ** North America | Article No International |
1 - 7 psi | ||||||||||
2 1/2" | 4 | 7.09 | 7.48 | 10.7 | 3.54 | 87 | 233 | 39.7 | 23121-2412-065 | 23121-2312-065 |
3" | 4 | 7.52 | 7.99 | 11.1 | 3.78 | 127 | 343 | 46.3 | 23121-2412-080 | 23121-2312-080 |
4" | 8 | 9.02 | 9.02 | 11.9 | 4.53 | 208 | 559 | 75.0 | 23121-2412-100 | 23121-2312-100 |
5" | 8 | 10 | 10 | 12.3 | 5 | 312 | 841 | 99.2 | 23121-2412-125 | 23121-2312-125 |
6" | 8 | 11 | 10.5 | 13 | 5.51 | 462 | 1246 | 126 | 23121-2412-150 | 23121-2312-150 |
8" | 8 | 13.5 | 11.5 | 14.2 | 6.77 | 694 | 1867 | 183 | 23121-2412-200 | 23121-2312-200 |
4 - 21 psi | ||||||||||
2 1/2" | 4 | 7.09 | 7.48 | 10.7 | 3.54 | 87 | 233 | 39.7 | 23121-2422-065 | 23121-2322-065 |
3" | 4 | 7.52 | 7.99 | 11.1 | 3.78 | 127 | 343 | 46.3 | 23121-2422-080 | 23121-2322-080 |
4" | 8 | 9.02 | 9.02 | 11.9 | 4.53 | 208 | 559 | 75.0 | 23121-2422-100 | 23121-2322-100 |
5" | 8 | 10 | 10 | 12.3 | 5 | 312 | 841 | 99.2 | 23121-2422-125 | 23121-2322-125 |
6" | 8 | 11 | 10.5 | 13 | 5.51 | 462 | 1246 | 126 | 23121-2422-150 | 23121-2322-150 |
8" | 8 | 13.5 | 11.5 | 14.2 | 6.77 | 694 | 1867 | 183 | 23121-2422-200 | 23121-2322-200 |
12 - 58 psi | ||||||||||
2 1/2" | 4 | 7.09 | 7.48 | 10.7 | 3.54 | 87 | 233 | 39.7 | 23121-2432-065 | 23121-2332-065 |
3" | 4 | 7.52 | 7.99 | 11.1 | 3.78 | 127 | 343 | 46.3 | 23121-2432-080 | 23121-2332-080 |
4" | 8 | 9.02 | 9.02 | 11.9 | 4.53 | 208 | 559 | 75.0 | 23121-2432-100 | 23121-2332-100 |
5" | 8 | 10 | 10 | 12.3 | 5 | 312 | 841 | 99.2 | 23121-2432-125 | 23121-2332-125 |
6" | 8 | 11 | 10.5 | 13 | 5.51 | 462 | 1246 | 126 | 23121-2432-150 | 23121-2332-150 |
8" | 8 | 13.5 | 11.5 | 14.2 | 6.77 | 694 | 1867 | 183 | 23121-2432-200 | 23121-2332-200 |
**) Distributed by Victaulic.
Cvm = gpm at a pressure drop of 1 psi and maximum opening corresponding to the p-band.
For working area less than Cv = 5.
Expansion vessel
For working area less than Cv = 5.
3.3 ft capillary pipe (Ø0.25"), capillary pipe connection Ø0.25" x R1/4" and capillary pipe connection with shut-off Ø0.25" x G3/8" are included.
Factory set at 43.5 psi (3 bar).
H [in] | D [in] | EAN | Article No |
10.8 | 3.5 | 3831112532052 | 23124-2542-001 |
For capillary pipe Ø0.25 in. with R1/4 connection.
Capillary pipe connection
For capillary pipe Ø0.25 in. with R1/4 connection.
1 pc 0.25xR1/4 included in TA-PILOT-R.
EAN | Article No | |
0.25" x R1/4" | 52 759-222 |
Brass/EPDM
Venting screw
Brass/EPDM
d | EAN | Article No |
M6 | 3831112527980 | 52 759-211 |
Can be installed without draining of the system.AMETAL®/Stainless steel/EPDM
Measuring point, extension 2.36 in.
Can be installed without draining of the system.
AMETAL®/Stainless steel/EPDM
L [in] | EAN | Article No |
2.36 | 7318792812804 | 52 179-006 |
Capillary pipe
Ø0.25 in.
1 pc included in TA-PILOT-R.
L [ft] | EAN | Article No |
3.3 | 52 759-221 |
Capillary pipe connection with shut-off
For replacement of existing measuring point on STAF/STAF-SG.
52 266-208:
1 pc G3/8 included in TA-PILOT-R.
d | D | Valve size | EAN | Article No |
G1/4 | 6 mm | 3/4" - 2" | 7318793999504 | 52 265-209 |
G3/8 | 6 mm | 2 1/2" - 16" | 7318793999405 | 52 265-208 |
Max 248°F (intermittent 302°F)AMETAL®/EPDM
Measuring point
Max 248°F (intermittent 302°F)
AMETAL®/EPDM
d | L [in] | EAN | Article No |
M14x1 | 1.7 | 7318792813207 | 52 179-014 |
M14x1 | 4.1 | 7318793858108 | 52 179-015 |
d | L [in] | EAN | Article No |
M14x1 | 1.7 | 7318792813207 | 52 179-014 |
M14x1 | 4.1 | 7318793858108 | 52 179-015 |
Suitable when insulation is used.Stainless steel/EPDM/Brass.
Venting extension
Suitable when insulation is used.
Stainless steel/EPDM/Brass.
d | D [in] | L [in] | EAN | Article No |
M6 | 0.47 | 2.76 | 3831112531727 | 52 759-220 |
For connection of capillary pipe while permitting simultaneous use of our balancing instrument.
Measuring point, two-way
For connection of capillary pipe while permitting simultaneous use of our balancing instrument.
For connection to existing measuring point on STAF/STAF-SG.
Can be installed during operation.
D | H [in] | EAN | Article No |
0.25" | 2.7 | 7318794026100 | 52 179-207 |