Control valves

Self-acting controls

ISO 9001

4.5.15

Steam

saturation

curve

Steam

saturation

curve

C

B

D

Cert. No. LRQ 0963008

TI-P036-01

CH Issue 5

BM and

BMF

BM, BMRA, BMF and BMFRA

Self-acting Control Valves

Description and available types

BM

Cast steel, normally open, single seat with 4 orifice sizes:

BM2, BM3, BM4 and BM6.

BMRA Cast steel, normally closed, single seat.

1

4

8

7

2 3

Cast iron, normally open, single seat with 4 orifice sizes:

BMF2, BMF3, BMF4 and BMF6.

BMF

BMFRA Cast iron, normally closed, single seat.

Sizes and pipe connections

BM and BMRA DN15 standard flange:

EN 1092 PN25

and ANSI 300

Note: ANSI 150 connections are available to special order for both

BM and BMRA self-acting control valves.

BMF and BMFRA DN15 standard flange:

Pressure / temperature limits

BM and BMRA

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A

���

���

���

EN 1092 PN16

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�

�

�

��

��

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1

54

6

BMRA and

BMFRA

2

Pressure bar g

BMF and BMFRA

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A

���

���

���

��

3

8

6

�

�

�

�

�

�

��

��

��

��

Pressure bar g

The product must not be used in this region.

When the valve is operated with a self-acting temperature

7

control system in this region a Spirax Sarco spacer must

be used in conjunction with the system.

A - B Flanged EN 1092 PN25 and ANSI 300

A - C Flanged ANSI 150

A - D Flanged EN 1092 PN16

Body design conditions

Maximum

BM and BMRA

design

BM and BMRA

PN25

BMF and BMFRA

PN16

Fitted to a Spirax Sarco spacer 350°C

Fitted directly to the actuator 232°C

Materials

No. Part

1 Body

BMF

BM

2 Valve closure member

3 Valve seat ring

4 Valve seat gasket

5 Ball return spring

6 Main return spring

7 Bonnet

8 Bonnet gasket

Material

temperature

BMF and BMFRA

BM

220°C

17.2 bar

10.3 bar

16.0 bar

10.3 bar

38 bar g

24 bar g

Cast iron

Cast steel

Stainless steel

Stainless steel

Mild steel

Stainless steel

Stainless steel

Steel

Reinforced exfoliated graphite

DIN 1691 GG 20

DIN 17245 GS C25

AISI 440 B

BS 970 431 S29

BS 1449 CS4

BS 2056 302 S26

BS 2056 302 S26

DIN 17243 C22.8

Maximum differential

pressure

Designed for a maximum cold

hydraulic test pressure of:

BMRA

BMF

BMFA

BM and BMRA

BMF and BMFRA

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification without notice.

© Copyright 2008

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