Boiler house
Steam injectors
Capacities
System capacities in kg/h of injected steam when heating tanks vented to atmospheric pressure.
System type
Control valve Size
Steam supply pressure
INS15
1⁄2" BSP
INS20
3⁄4" BSP
INS25
INS40
INS50
1" BSP
11⁄2" BSP
2" BSP
Capacities in kg/h of saturated steam
1 150
1 400
1 750
2 100
2 525
2 800
2 950
3 200
3 280
3 600
3 800
3 920
4 200
4 500
5 000
INS65
21⁄2" BSP
bar g
2
3
4
5
6
6.9
7
8
8.2
9
10
10.3
11
12
13
psi g
29
44
58
73
87
100
102
116
118
131
145
150
160
174
189
350
580
425
750
550
1 000
650
1 150
750
1 400
840
1 535
850
1 550
2 275
2 500
2 675
2 500
3 350
4 200
5 000
5 800
6 500
6 600
7 400
7 550
8 200
9 000
-
-
-
-
INS80
3" BSP
3 700
4 900
6 000
7 200
8 400
9 450
9 550
10 700
10 950
11 850
13 000
-
-
-
-
combined pressure
Vacuum breaker
VB14 - 1⁄2"
VB14 - 1⁄2"
VB14 - 1⁄2"
VB14 - 1⁄2"
VB14 - 1⁄2"
VB14 - 1⁄2"
VB14 - 1⁄2"
87
110
120
160
150
200
180
240
215
280
237
316
240
320
275
360
278
370
290
410
315
450
325
460
350
-
-
375
-
-
400
-
-
1 000
1 750
1 020
1 780
1 100
1 900
1 200
2 075
1 230
2 135
Where steam supply pressures are higher consider the use of a pressure reducing valve or alternatively, the use of a
reducing and temperature control valve. Please consult Spirax Sarco for a suitable type.
Equipment details
Note: All equipment is available screwed BSP. For options of NPT or API connections refer to relevant literature.
System type Control valve*
Controller type
SA128 with 2 m capillary
SA128 with 2 m capillary
SA128 with 2 m capillary
SA121 with 2 m capillary
SA121 with 2 m capillary
SA121 with 2 m capillary
SA121 with 2 m capillary
Range
Range 1
-20 to 110°C
Range 1
-20 to 110°C
Range 1
-20 to 110°C
Range 2
40 to 105°C
Range 2
40 to 105°C
Range 2
40 to 105°C
Range 2
40 to 105°C
Sensor pocket
Stainless steel - 1"
to suit SA128
Stainless steel - 1"
to suit SA128
Stainless steel - 1"
to suit SA128
Stainless steel - 1"
to suit SA121
Stainless steel - 1"
to suit SA121
Stainless steel - 1"
to suit SA121
Stainless steel - 1"
to suit SA121
Steam injector
1 x IN25M - 1"
1 x IN25M - 1"
1 x IN40M - 11⁄2"
2 x IN40M - 11⁄2"
3 x IN40M - 11⁄2"
5 x IN40M - 11⁄2"
7 x IN40M - 11⁄2"
INS15
SB
INS20
SB
INS25
KB51
INS40
KC51
INS50
KC51
INS65
NS
INS80
NS
1⁄2"
3⁄4"
1"
11⁄2"
2"
21⁄2"
3"
* SB control valve is bronze, single seat, normally open, direct acting.
KB51 and KC51 control valves are bronze, single seat, normally open, bellows balanced, direct acting.
NS control valve is gunmetal, double seat, normally open, stainless steel trim, direct acting.
A Y-type strainer is recommended upstream of the control valve. The Y-type strainer should normally be the same size as the steam
supply pipeline. Consider a Spirax Sarco brass / bronze Fig 12 strainer.
An isolating valve is recommended upstream of the Y-type strainer.
Consider the use of an M10 Spirax Sarco carbon steel ball valve or a HV3 bronze stop valve.
Safety information, installation and maintenance
This document does not contain sufficient information to install the system safely. See the relevant Installation and Maintenance Instructions
supplied with the system components.
Safety note:
Your attention is drawn to Safety Information Leaflet IM-GCM-10.
Installation note:
Spirax Sarco direct steam injection heating systems are designed to operate with the minimum of noise provided the installation is correct.
How to order
Example: 1 off Spirax Sarco INS15, 1⁄2" screwed BSP, direct steam injection heating system.
TI-P401-03 AB Issue 5
INS Direct Steam Injection Heating Systems
2.2.6
