Boiler house

Blowdown vessels

Valve coefficients

Size

Kv value

Materials

Valve

Body and insert

Stem seals

Vented ball

DN65

DN25 - DN50

DN25

DN32

30

40

Zinc plated carbon steel

Antistatic R-PTFE

Austenitic stainless steel

Austenitic stainless steel

Martensitic stainless steel

Carbon and graphite reinforced PTFE

DN40

81

DN50

103

DN65

197

Aluminium - anodised

Carbon steel - nickel plated

Nitrile rubber

Actuator

ASTM A216 WCB

Body, piston

and end caps

Pinion

'O' ring seals

Stem

Seats

AISI 316

AISI 316

AISI 420

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

2.9.20