Steam traps

Ball float

Steam

saturation

curve

C

5.5.73

Sizes and pipe connections

DN15, DN20, DN25, DN40 and DN50.

Note: Flow direction when facing the body: - DN15 to DN25 is left to

right. - DN40 and DN50 is right to left.

Standard flanges are EN 1092 PN40 with face-to-face dimensions

in accordance with EN 26554 (Series 1).

On request - ASME (ANSI) B 16.5 Class 150 and 300 flanges are

available with face-to-face dimensions in accordance with EN 26554

(Series 1).

Note: ASME (ANSI) flanges are supplied with tapped (UNC) holes for

flange bolts.

Materials

No. Part

1 Body

2

Cover studs

Cover nuts

3 Cover gasket

4 Cover

Material

Austenitic

stainless steel

(316)

1.4408 / CF8M

Austenitic stainless steel

A2.70

Austenitic stainless steel

A4

Reinforced exfoliated graphite

Austenitic

stainless steel

(316)

1.4408 / CF8M

BS 970 431 S29

Pressure / temperature limits

DN15,

Valve seat

DN20 Stainless

and

steel

5

DN25

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A-B

A-C

A

Main valve

DN40

Stainless BS 3146 Pt2 ANC2

B

assembly

and

steel

DN50

DN15,

Valve seat

DN20 Stainless

gasket

and

steel

DN25

BS 970 416 S37

BS 1449 304 S11

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Pressure bar g

The product must not be used in this region.

This product should not be used in this region as damage to

the air vent may occur.

Flanged EN 1092 PN40 and ASME (ANSI) 300.

Flanged ASME (ANSI) 150.

6

Main valve

DN40

Reinforced exfoliated

assembly

and

graphite

gasket

DN50

Pivot frame

DN15,

assembly set

DN20 Stainless

screws

and

steel

DN25

BS 4183 18/8

BS 970 304 S15

BS 6105 A4.80

BS 1449 304 S16

BS 1449 304 S16

BS 1449 304 S16

steel

BS 970 431 S29

steel

BS 1449 409 S19

BS 970 303 S31

BS 1449 304 S11

BS 1449 304 S16

Note: The use of the bimetallic element extends the superheat

resistance to in excess of 400 °C.

7

Bolts DN40

Stainless

Main

steel

valve

Studs

Stainless

assembly and DN50

steel

nuts

8 Ball float and lever

Stainless

steel

DN15,

9 Support frame

DN20 Stainless

and

steel

DN25

DN15,

10 Pivot frame

DN20 Stainless

and

steel

DN25

DN15,

11 Pivot pin

DN20

Stainless

and

DN25

12 Erosion deflector

Stainless

steel

17

Air vent assembly for

Stainless

all pressure ratings

18 Air vent seat gasket

Stainless

steel

19 SLR assembly

Stainless

steel

20 SLR gasket

Stainless

steel

21 SLR seal

Graphite

Body design conditions

PMA

Maximum allowable pressure

TMA

Maximum allowable temperature

Minimum allowable temperature

PMO

Maximum operating pressure for

saturated steam service

PN40

40 bar g @ 100 °C

400 °C @ 27.4 bar g

-10 °C

32 bar g @ 239 °C

285 °C @ 30.3 bar g

400 °C @ 27.4 bar g

When fitted with a

Maximum

capsule

TMO

operating

temperature When fitted with a

bimetallic air vent

Minimum operating temperature

Note: For lower operating temperatures consult Spirax Sarco

DN15

Size

DN20

DN25

FT46-4.5

4.5 bar

FT46-10

10 bar

FT46-14

14 bar

FT46-21

21 bar

FT46-32

32 bar

PMX

Maximum differential

pressure

0 °C

DN40

DN50

4.5 bar

10 bar

-

21 bar

32 bar

60barg

48barg

Designed for a maximum cold hydraulic test pressure:

Note: With internals fitted, test pressure must not exceed:

Caution: The trap in its complete operational form must not be

subjected to a pressure greater than 48 bar otherwise damage to the

internal mechanism may result.

26 Inlet plate

DN40

and

Stainless

DN50 steel

only

Page 2 of 6

TI-P143-01 ST Issue 11

FT46 Stainless Steel Ball Float Steam Traps (DN15 to DN50)

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