STAF, STAF-SG

IMI TA
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​​​​​​​ Balancing valve – PN 16 and PN 25 – DN 20-400 A flanged, cast iron (STAF) and ductile iron (STAF-SG) balancing valve that delivers accurate hydronic performance in an impressive range of applications. The STAF/STAF-SG is ideal for use mainly on the secondary side in heating and cooling systems.

Handwheel

Equipped with a digital read-out, the handwheel ensures accurate and straightforward balancing.

Self-sealing measuring points

For simple, accurate balancing.

Positive shut-off function

For easy maintenance.

Technical description

Applications:

Heating and cooling systems.

Functions:

Balancing
Pre-setting
Measuring
Shut-off (The balancing cone for valve DN 65-400 is pressure released).

Dimensions:

STAF: DN 65-150
STAF-SG: DN 20-400

Pressure class:

STAF: PN 16
STAF-SG: PN 16 and PN 25 (see each product)

Temperature:

Max. working temperature: 120°C
Min. working temperature: -10°C

Media:

Water or neutral fluids, water-glycol mixtures (0-57%).

Material:

Body, STAF: Cast iron EN-GJL-250 (GG 25).
Body, STAF-SG: Ductile iron EN-GJS-400-15.

DN 20-150:
Bonnet, cone and spindle of AMETAL®.
DN 200-300:
Bonnet and cone of ductile iron EN-GJS-400-15, and spindle of AMETAL®.
DN 350-400:
CE marked products: Bonnet of ductile iron EN-GJS-400-15, cone of ductile iron EN-GJS-400-15 and gunmetal CuSn5Zn5Pb5 (EN 1982), and spindle of AMETAL®.
Not CE marked products: Bonnet of ductile iron EN-GJS-400-15, cone of silicon brass CuZn16Si4-C (EN 1982) and gunmetal CuSn5Zn5Pb5 (EN 1982), and spindle of AMETAL®.

Cone DN 65-400: PTFE coated.

Seals: EPDM.
Slip washer: PTFE.
Bonnet bolts: Surface treated steel.
Measuring points: AMETAL® and EPDM.
Handwheel: DN 20-50 polyamide and TPE, DN 65-150 polyamide, DN 200-400 aluminium.


AMETAL® is the dezincification resistant alloy of IMI Hydronic Engineering.

Surface treatment:

DN 20-200: Epoxy painting.
DN 250-400: Duasolid painting.

Marking:

Body: TA, PN, DN, flow direction arrow, material and casting date (year, month, day).
CE-marking:
CE: STAF (PN 16) DN 65-150, STAF-SG (PN 16) DN 200, STAF-SG (PN 25) DN 50-125.
CE 0409*: STAF-SG (PN 16) DN 250-400, STAF-SG (PN 25) DN 150-400.
*) Notified body.

Face to face length:

ISO 5752 series 1, BS 2080 and EN 558-1 series 1.

STAF – Cast iron

Bolted bonnet

PN 16, ISO 7005-2, EN 1092-2

DN
Number of
bolt holes
D
L
H
Kvs
Kg
EAN
Article No
65-2
4
185
290
205
85
12.4
7318792823305
52 181-065
80
8
200
310
220
120
15.9
7318792823404
52 181-080
100
8
220
350
240
190
22
7318792823503
52 181-090
125
8
250
400
275
300
32.7
7318792823602
52 181-091
150
8
285
480
285
420
42.4
7318792823701
52 181-092

→ = Flow direction


Kvs = m3/h at a pressure drop of 1 bar and fully open valve.

STAF-SG – Ductile iron

Threaded bonnet

PN 25, ISO 7005-2, EN 1092-2 (DN 20-50 also fit PN 16 flanges)

DN
Number of
bolt holes
D
L
H
Kvs
Kg
EAN
Article No
20
4
105
150
100
5.7
2.3
7318792825705
52 182-020
25
4
115
160
109
8.7
2.9
7318792825804
52 182-025
32
4
140
180
111
14.2
4.3
7318792825903
52 182-032
40
4
150
200
122
19.2
5.2
7318792826009
52 182-040
50
4
165
230
122
33
6.6
7318792826108
52 182-050

Bolted bonnet

PN 25, ISO 7005-2, EN 1092-2

DN
Number of
bolt holes
D
L
H
Kvs
Kg
EAN
Article No
65-2
8
185
290
205
85
11
7318792826207
52 182-065
80
8
200
310
220
120
14
7318792826306
52 182-080
100
8
235
350
240
190
19.6
7318792826405
52 182-090
125
8
270
400
275
300
28.1
7318792826504
52 182-091
150
8
300
480
285
420
37.1
7318792826603
52 182-092

Bolted bonnet

Measuring points on body

PN 16, ISO 7005-2, EN 1092-2

DN
Number of
bolt holes
D
L
H
Kvs
Kg
EAN
Article No
200
12
340
600
430
765
76
7318792823800
52 181-093
250
12
400
730
420
1185
122
7318792823909
52 181-094
300
12
460
850
480
1450
163
7318792824005
52 181-095
350
16
520
980
585
2200
287
7318793859402
52 181-096
400
16
580
1100
640
2780
391
7318793859303
52 181-097
Not CE marked products *
350
16
520
980
585
2200
297
7318794004603
52 181-196
400
16
580
1100
640
2780
406
7318794004702
52 181-197

PN 25, ISO 7005-2, EN 1092-2

DN
Number of
bolt holes
D
L
H
Kvs
Kg
EAN
Article No
200
12
360
600
430
765
76
7318792826702
52 182-093
250
12
425
730
420
1185
122
7318792826801
52 182-094
300
16
485
850
480
1450
163
7318792826900
52 182-095
350
16
555
980
585
2200
287
7318793843401
52 182-096
400
16
620
1100
640
2780
391
7318793843500
52 182-097
Not CE marked products *
350
16
555
980
585
2200
297
7318794004801
52 182-196
400
16
620
1100
640
2780
406
7318794004900
52 182-197

*) NOTE: Not allowed to be installed in EU or EFTA countries.

→ = Flow direction


Kvs = m3/h at a pressure drop of 1 bar and fully open valve.

Accessories

Measuring point

AMETAL®/EPDM

d
L
EAN
Article No
DN 20 - 50
R1/4
39
7318792813108
52 179-009
R1/4
103
7318792814600
52 179-609
DN 65 - 400
R3/8
45
7318792813009
52 179-008
R3/8
101
7318792814501
52 179-608

Measuring point, extension 60 mm

(not for 52 179-000/-601)
Can be installed without draining of the system.
AMETAL®/Stainless steel/EPDM

L
EAN
Article No
60
7318792812804
52 179-006

Measuring point

For older STAD and STAF
Max 150°C
AMETAL®/EPDM

d
L
EAN
Article No
DN 20 - 50
R1/4
30
7318792812408
52 179-000
R1/4
90
7318792814303
52 179-601
DN 65 - 400
R3/8
30
7318792812903
52 179-007
R3/8
90
7318792814402
52 179-607

Identification tag

EAN
Article No
7318792779206
52 161-990

Handwheel

Complete

DN
EAN
Article No
20 - 50
7318794043503
52 186-007
65 - 150
7318792834806
52 186-002
200 - 400
7318792835001
52 186-004

Allen key

For locking of setting.

[mm]
For DN
EAN
Article No
3
20 - 150
7318792836008
52 187-103
5
200 - 400
7318792836107
52 187-105

Insulation

For heating/cooling
CFC-free polyurethane. Covered with grey PVC.
See catalogue leaflet "Prefab insulations" for complete details.

For DN
L
D
C
EAN
Article No
50
390
250
252
7318792840708
52 189-850
65
450
270
272
7318792840807
52 189-865
80
480
290
292
7318792840906
52 189-880
100
520
320
322
7318792841002
52 189-890
125
570
350
352
7318792841101
52 189-891
150
660
380
382
7318792841200
52 189-892

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