Boiler house Steam injectors
2
System examples The tables below give steam capacities for some typical injector/valve/controller combinations for tanks vented to atmospheric pressure. Intermediate values may be obtained by linear interpolation. For alternatives or special applications refer to specific Spirax Sarco literature or contact our sales engineers. The tables below are examples only, and the valve/controller combinations shown may not be available in all markets. Note: Steam pressure at the injector will be much reduced and proper injection and mixing may not occur if a smaller valve (or larger injector) is fitted.
Self-acting control system examples Injector type IN15
IN25M
IN40M
Number off
1
2
1
1
2
3
BX6 DN15 (½")
SB DN15 (½")
SB DN20 (¾")
KB51 DN25 (1")
KC51 DN40 (1½")
KC51 DN50 (2")
Valve type/size
Valve Kv
1.65
2.58
3.81
9.8
16.48
34.0
2.2 4
Self-acting control with 2 m (6.6 ft) capillary Range 1. -20 ° C to 110 ° C (-4 F to 230 F)
Self-acting control with 2 m (6.6 ft) capillary Range 2. 40 ° C to 105 ° C (104 F to 221 F)
Controller type
Steam supply pressure bar g (psi g)
System saturated steam capacity kg/h (lb/h)
2 (29) 4 (58) 6 (87)
47 (104) 78 (172) 109 (240) 142 (313) 171 (377) 201 (443) 218 (481)
82 (181) 140 (309) 195 (430) 236 (520) 310 (683) 365 (805) 393 (866)
110 (243) 200 (441) 280 (617) 360 (794) 450 (992)
350 (772)
580
1150 (2540) 1750 (3858) 2525 (5567) 3200 (7055) 3800 (8378) 4500 (9921) 5000 (11023)
550 (1213) 750 (1653) 1000 (2205) 1200 (2646)
1000 (2205) 1400 (3086) 1750 (3858) 2075 (4575) 2500 (5512) 2675 (5897)
8 (116) 10 (145) 12 (174) 13 (189)
TI-P401-05 EMM Issue 13
Page 4 of 5
IN15, IN25M and IN40M Steam Injectors
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