Size

DN25 - 1"

DN32 - 11⁄4"

DN40 - 11⁄2"

DN50 - 2"

134

174

134

179

134

186

134

186

170

170

174

175

183

180

186

180

67

153

90

25

67

153

90

25

67

153

90

25

67

153

90

25

84

4.40

5.90

84

4.20

7.65

84

4.95

8.55

84

4.75

9.40

Control valves

Pressure reducing/surplussing valves

A

B

B

B

C

D

E

F

G

Dimensions / weights (approximate) in mm and kg

Scr. BSP/NPT PN16

ANSI 150

JIS 10

Weight

Scr.

*Flg

* Note: Flanged weights are typical of the BRV73 model and the figures quoted are based on the PN16 version.

E Withdrawal distance

Q

L

K

4.6.16

J

H

G

E

D

C

B

A

D

C

G

A

B

F Withdrawal distance

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P210-04) supplied with the product.

Installation note:

The valve should be installed in a horizontal pipeline with the

direction of flow as indicated by the arrow on the valve body.

How to order

Example: 1 off Spirax Sarco 1" screwed BSP BRV71 pressure

reducing valve with SG iron body, stainless steel bellows and

fitted with an orange spring for a downstream pressure control

of 3.5 to 9.0 bar g.

Spare parts

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

in broken line are not supplied as spares.

Available spares - Note the spares listed are common to all sizes

F

F

Pressure

adjustment

spring

Grey

Green

Orange

0.14 to 1.7 bar g

1.40 to 4.0 bar g

3.50 to 9.0 bar g

(Set of 4)

(Set of 4)

K, Q

K, Q

K, Q

J

E, C, H

B

G

F

L

A

D

Control bellows - Stainless steel

Bellows pushrod assembly,

(Sub assembly, head, 'O' rings,

lower pushrod and balancing bellows)

Bottom cap

Strainer screen

Return spring and gasket set

F

F

Bolt set

Return spring

How to order spares

Spring housing

Bottom cap

Always order spares by using the description given in the column

headed 'Available spares' and state the size, type and pressure

range of the reducing valve.

Example: 1 off Pressure adjustment spring (orange), having a

downstream pressure range of 3.5 to 9.0 bar g for a Spirax Sarco

1" BRV71 pressure reducing valve.

Page 4 of 4

BRV71 and BRV73 SG Iron Pressure Reducing Valves

TI-P210-01 CH Issue 4

Page 4 of 4

Gasket set