Control valves

Pressure reducing/surplussing valves

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ISO 9001

TI-P045-14

CH Issue 5

Cert. No. LRQ 0963008

BRV2S and BRV2B

SG Iron

Pressure Reducing Valves

Description

The BRV2S and BRV2B are direct acting pressure reducing valves

designed for applications using steam or gases such as

2

compressed air. This range of pressure reducing valves have SG

iron bodies and are available with screwed or flanged

connections.

Available types

BRV2S Stainless steel bellows

BRV2B Phosphor bronze bellows

BRV2SP Stainless steel bellows

BRV2BP Phosphor bronze bellows

18

3

1

7

20

* BRV2SP and

BRV2BP only

17*

16*

4

9

19

10

12

11

13

14

15

LM 24

With external pressure

sensing connection

BRV2 pressure reducing valves are supplied with one of three

colour coded springs which are identified by the disc (18) located

on the adjustment handwheel; Note: Where control spring ranges

6

overlap always use the lower range to give better control:

Grey

For downstream pressure control: 0.14 to 1.7 bar g

Green

For downstream pressure control: 1.40 to 4.0 bar g

Orange For downstream pressure control: 3.50 to 8.6 bar g

Standards

This product fully complies with the requirements of the European

Pressure Equipment Directive 97/23/EC.

Certification

This product is available with a manufacturers' Typical Test Report.

Note: All certification/inspection requirements must be stated at

the time of order placement.

Sizes and pipe connections

1⁄2", 3⁄4" and 1" screwed BSP (BS 21 Rp) or NPT.

DN15, DN20 and DN25 flanged EN 1092 PN25.

Pressure/temperature limits

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8

Materials

No.Part

1 Spring housing

2 Adjustment handwheel

3 Top spring plate

4

Pressure adjustment

spring

5 Bellows assembly

6

Bellows assembly

gasket

7 Hex. bolt (M8 x 25 mm)

8 Body

Materials

Aluminium epoxy coated

Polypropylene

Steam

saturation

curve

Cast iron

Silicon chrome

spring steel

Stainless steel

Phosphor bronze/brass BS 2872 Cz 122

Stainless steel reinforced exfoliated

graphite

DIN 1691 GG 20

BS 2803 685 A55

Range 2

316Ti/316L

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Pressure bar g

The product must not be used in this region.

BS 3692 Gr. 8.8

DIN 1693 GGG 40.3

ASTM A276 316L

BS 970 431 S29

BS 1449 316 S11

AISI 420

BS 20056 316 S42

BS 1449 316 SH

BS 970 431 S29

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum allowable temperature

Maximum operating pressure

for saturated steam service

Maximum operating temperature

Minimum operating temperature

PN25

25 bar g @ 120°C

210°C @ 19 bar g

-10°C

19 bar g @ 210°C

210°C @ 19 bar g

Steel zinc plated

SG iron

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Stainless steel

Brass

Polypropylene

Stainless steel

Mild steel copper plated

0°C

Note: For lower operating temperatures consult Spirax Sarco

10 Pushrod

11 Valve seat

12 Valve seat gasket

13 Valve

14 Valve return spring

15 Strainer screen

16 Blanking plug

17 Compression fitting

18 Spring range ID disc

19 Bulkhead plate

20 Tamper-proof pin

Note: Items 10, 11, 13, 14, 15 and 19 are all part of one assembly.

Maximum downstream reduced pressure

8.6 bar g

Maximum differential pressure

19 bar

Maximum recommended turndown ratio 10:1 at maximum flow

Designed for a maximum cold hydraulic test pressure of 38 bar g

Note: With internals fitted, test pressure must not exceed 19 bar g

316L

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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