Product Handbook 2026 - Volume 2

Steam traps Balanced pressure

8

Pressure/temperature limits (ISO 6552)

Body design conditions

PN25

PMA Maximum allowable pressure

25 bar g @ 120 °C

Steam saturation curve

TMA Maximum allowable temperature

242 °C @ 20 bar g

Minimum allowable temperature

-10 °C

PMO Maximum operating pressure

21 bar g @ 217 °C

Pressure bar g

TMO Maximum operating temperature

242 °C @ 20 bar g

The product must not be used in this region. The product should not be used in this region or beyond its operating range as damage to the internals may occur.

Minimum operating temperature 0 °C Designed for a maximum cold hydraulic test pressure of 38 bar g

Materials

1

7

2

5

8 9

5.2.31

4 3

6

8.2 50

No.

Part

Material

1 2 3 4 5 6 7 8

Cover

Steel

1.0460 (C22.8)

Capsule

Stainless steel

Valve seat

Stainless steel

Strainer screen

Stainless steel

Cover gasket

Nickel reinforced exfoliated graphite

Body

Steel

1.0460 (C22.8)

Cover bolts

Steel M8 x 25 mm

BS 1506 - 621 A B7M

Valve seat gasket

Stainless steel

9

Spacer plate

Stainless steel

10

Spring

Stainless steel

TI-P124-08 CMGT Issue 3

Page 2 of 4

BPM21L Steel Balanced Pressure Thermostatic Steam Trap

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