Control valves

Self-acting controls

Kv values

BX2

BX3

0.38

0.64

For conversion:

Capacities

Spare parts

BX4

1.03

Cv (UK) = Kv x 0.963

BX6

BXRA

1.65

0.59

Cv (US) = Kv x 1.156

The spare parts available are shown in solid outline. Parts drawn

in broken line are not supplied as spares.

For saturated steam sizing capacities, see TI-GCM-08.

For water sizing capacities, see TI-GCM-09.

Dimensions / weights (approximate) in mm and kg

Size

A

B

Weight

1⁄2"

80

83

0.7

Available spares

Valve seat assembly

Gasket set

How to order spares

BX valve

BXRA valve

(packet of 3 each)

3, 4, 6, 8

3, 4, 6, 8

4, 8

Always order spares by using the description given in the column

headed 'Available spares' and state the size and type of valve.

Example: 1 - Valve seat assembly for a 1⁄2" BXRA self-acting

control valve.

A

B

1

4

3

6

8

BX

BXRA

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-S21-01) supplied with the product.

Installation note:

The valve should be fitted in a horizontal line. The actuator position

will depend on the type fitted to the valve.

4

3

6

8

How to order

Example: 1 off Spirax Sarco 1⁄2" screwed BSP BX4 self-acting control

valve with gunmetal body and stainless steel trim.

7

Recommended tightening torques

Item no.

3

7

Part

Valve seat

Bonnet

N m

40 - 50

40 - 50

TI-P036-02 CH Issue 5

BX and BXRA Gunmetal Self-acting Control Valves

Spindle

retaining

nut

or

mm

18 A / F

4.5.18