Boiler house Blowdown vessels
2
Valve coefficients Size
DN25
DN32
DN40
DN50
DN65
Kv value
30
40
81
103
197
Materials Valve Body and insert
Actuator Body, piston and end caps
Zinc plated carbon steel
ASTM A216 WCB
Aluminium - anodised
Stem seals
Antistatic R-PTFE
Pinion
Carbon steel - nickel plated
Vented ball
Austenitic stainless steel
AISI 316
'O' ring seals
Nitrile rubber
DN65
Austenitic stainless steel
AISI 316
Stem
DN25 - DN50 Martensitic stainless steel
AISI 420
2.9 19
Seats
Carbon and graphite reinforced PTFE PDR 0.8
How to specify Air actuated ball valve, DN40, PN40 with carbon reinforced seats, 90 degree rotary pneumatic actuator and switch box. NAMUR compatible solenoid valve 220 / 240 Vac. How to order Example: 1 off Spirax Sarco DN40 ABV21i air actuated boiler blowdown valve having PN40 (F4) flanged connections plus 1 off MV11 solenoid valve 220 / 240 Vac.
TI-P405-45 EMM Issue 3
Page 3 of 7
ABV21i and ABV40i Air Actuated Boiler Blowdown Valves
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