Product Handbook 2026 - Volume 2

Steam traps Ball float

8

FTS23 - Pressure/temperature limits (ISO 6552) Stainless steel body and cover Flanged PN40

Pressure psi g

0

145

290

435

580

797 572 392 212

752

A

Steam saturation curve

32 14

A

Pressure bar g

The product must not be used in this region.

A - A Flanged PN40

Body design conditions

PN40

PMA Maximum allowable pressure

40 bar g @ 0 °C

580 psi g @ 32 °F

TMA Maximum allowable temperature

425 °C @ 21.7 bar g

797 °F @ 315 psi g

Minimum allowable temperature

-10 °C

14 °F

FTS23-07 7 bar g @ 425 °C 102 psi g @ 797 °F FTS23-23 23 bar g @ 350 °C 334 psi g @ 662 °F

PMO Maximum operating pressure

TMO Maximum operating temperature

425 °C @ 21.7 bar g

662 °F @ 315 psi g

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

0 °C

32 °F

FTS23-07

7 bar

102 psi

D PMX Maximum differential pressure

FTS23-23

23 bar

334 psi

Designed for a maximum cold hydraulic test pressure of:

60 bar g

870 psi

8.5 132

Please note that the trap in its complete operational form must not be subjected to pressures greater than 40 bar g (580 psi g) as damage to the internals may occur.

TI-P605-01 CMGT Issue 3

Page 4 of 10

FTS23 Stainless Steel Body and Cover FTC23 Carbon Steel Body with Stainless Steel Cover Ball Float Steam Traps

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