Boiler house

Blowdown vessels

2.9.13

Steam

saturation

curve

Steam

saturation

curve

Pressure / temperature limits

The product must not be used in this region

KBV21i

Pressure bar g

Body design conditions

PMA Maximum allowable pressure

TMA Maximum allowable temperature

Minimum allowable temperature

PMO Maximum operating pressure for saturated steam service

TMO Maximum operating temperature

Minimum operating temperature. Note: For lower operating temperatures consult Spirax Sarco

PMX Maximum differential pressure is limited to the PMO

Designed for a maximum cold hydraulic test pressure of :

PN40

40 bar g @ 120°C

260°C @ 0 bar g

-29°C

17.25 bar g

260°C @ 0 bar g

-29°C

60 bar g

The product must not be used in this region

KBV40i

Pressure bar g

Body design conditions

PMA Maximum allowable pressure

TMA Maximum allowable temperature

Minimum allowable temperature

PMO Maximum operating pressure for saturated steam service

TMO Maximum operating temperature

Minimum operating temperature. Note: For lower operating temperatures consult Spirax Sarco

PMX Maximum differential pressure is limited to the PMO

Designed for a maximum cold hydraulic test pressure of :

ASME 300

51 bar g @ 38°C

260°C @ 0 bar g

-29°C

17.25 bar g

260°C @ 0 bar g

-29°C

76.5 bar g

DN65

197

Valve coefficients

Size

DN25

DN32

Kv value

30

40

How to specify

DN40

DN50

81

103

DN40 key operated boiler blowdown valve, flanged PN40 with carbon reinforced seats and stainless steel key.

How to order

Example: 1 off Spirax Sarco DN40 KBV21i key operated boiler blowdown valve having PN40 (F4) flanged connections.

Page 2 of 5

TI-P405-47 EMM Issue 2

KBV21i and KBV40i Key Operated Boiler Blowdown Valve

T

e

m

p

e

r

a

t

u

r

e

°

C

T

e

m

p

e

r

a

t

u

r

e

°

C