Direct Operated Pressure Regulator BRV2

Direct Operated Pressure Regulator

BRV2

The BRV2 is a direct acting pressure reducing valve suitable for steam or gases, such as compressed air.

Model

➪

Sizes

Connections

Construction

Options

BRV2S

1/2" , 3/4", 1"

NPT

Ductile Iron

BRV2B with phosphor bronze/brass bellows assembly

BRV2SP & BRV2SB optional types with external pressure sensing

16

2

18

3

4

7

C

ONSTR UCTION

M

ATERIALS

17

18

19

20

8

9

10

11

12

13

14

15

16

3

4

No.

Part

1 Spring Housing

2 Adjustment Hand Wheel

5

6

7

Top Spring Plate

Pressure Adjustment

Spring

Material

Aluminum Epoxy Coated

Mineral Reinforced Nylon

Cast Iron

Silicone Chrome

Spring Steel

Bellows Assembly Option Stainless Steel

Phosphor Bronze/Brass

Bellows Assembly Gasket Stainless Steel Reinforced

Exfoliated Graphite

Spring Housing Bolts Steel–Zinc plated

M8 x 25 mm

Body - Screwed & Flanged SG Iron

Guide Bush Graphite Filled PTFE

Pushrod

Valve Seat

Valve Seat Gasket

Valve

Valve Return Spring

Strainer Screen

Spring Range

Identification Disc

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Stainless Steel

Polypropylene

Bulkhead Plate

Tamperproof Pin

Blanking Plub

Compression Fitting

Stainless Steel

Mild Steel - Copper Plated

Stainless Steel

Brass

Material Spec.

LM 24

DIN 1691 GG 20

BS 2803 685 A55

Range 2

316Ti/316L

BS 3692 Gr 8.8

DIN 1693 GGG40.3

ASTM A276 Gr 316L

BS 970 431 S29

BS 1449 316 S11

AISI 420

BS 20056 316 S42

BS 1449 316 SH

316L

BS970 431 S29

L

IMITING

O

PERATING

C

ONDITIONS

-

STEAM OR GAS

Max. Upstream Pressure

Max. Downstream Pressure

Max. Operating Temperature

Max. Cold Hydraulic Test

275 psig (19 barg)

115 psig (8.0 barg)

410˚F (210˚C)

550 psig (38 barg)

Max. Recommended Turndown Ratio 10:1 psig at Maximum Flow

Shutoff ANSI Class IV

400

Pressure barg

0 2 4 6 8 10 12 14 16 1819

200

1

6

5

T

YPICAL

A

PPLICATIONS

Small steam or gas pressure reducing applications.

18

8

9

17

10

12

11

13

14

15

1

20

19

200 100

50

Do not use in this region

100 150

Pressure psig

200 250 275

D

OWNSTREAM

P

RESSURE

R

ANGES

For the following downstream pressures, three color-coded springs are available. Where the pressures overlap, use the lowest pressure spring to give the downstream pressure required:

Grey: 2 to 25 psig Green:

0.14 to 1.7 barg

20 to 60 psig

1.4 to 4.0 barg

Orange:

3.5 to 8.6 barg

50 to 125 psig

D

IMENSIONS

(

NOMINAL

)

IN INCHES AND MILLIMETERS

Size A C D E

Withdrawal

Distance

Weight

1/2" 3.3

83

2.2

55

5.0

1.0

126.5

25

3.4 lb

1.55 kg

3/4"

1"

3.8

96

4.25

108

2.2

55

2.2

55

5.0

1.0

126.5

25

5.0

1.0

126.5

25

3.6 lb

1.65 kg

4.2 lb

1.90 kg

Local regulation may restrict the use of this product below the conditions quoted. Limiting conditions refer to standard connections only.

In the interests of development and improvement of the product, we reserve the right to change the specification.

TI-3-107-US 07.97

Direct Operated Pressure Regulator

BRV2

C

APACITIES – Saturated steam capacities in lb/h

Full lift capacities for safety valve sizing are shown below:

Cvs (Kvs)

1/2" (DN15)

1.8

(1.5)

3/4" (DN20)

2.9

(2.5)

1" (DN25)

3.5

(3.0)

Q

S

PARE

P

AR TS

150

(10)

165

(11)

180

(12)

195

(13)

245

(17)

125

(8.6)

120 (8)

105 (7)

90 (6)

75 (5)

60 (4)

45 (3)

30 (2)

15 (1)

0

Steam

Capacity lb/h

0

0

0

0

Compressed

Air Capacity cfm Free Air

0

0

30 (2)

45

(3)

60

(4)

75

(5)

105

(7)

90

(6)

120

(8)

Upstream pressure psig (barg)

Pressure

Adjustment

Spring

F

80

100

150

160

200

300

240

300

450

320

400

600

400

500

750

480 560 1/2" DN 15

600 700 3/4" DN 20

900 1050 1" DN 25

J

Valve

& Seat

Assembly

L

M

20

20

40

40

40

60

60 80 100 120 140 160 180 200

1/2" DN 15

80 100 120 140 160 180 200 220 240

3/4" DN 20

80 120 160 200 240 280 320 380

1" DN 25

D

G Spring

Housing

Bolts

E

F

F

Bellows Set

Gasket Set

M

H

OW TO USE THE CHAR T

The curved lines labelled 30, 45, 60, etc., represent upstream pressures. Downstream pressures are read along the vertical line on the left hand side of the chart.

Example:

Required, a reducing valve to pass 160 lb/h reducing from 150 to 60 psi. From the downstream pressure of 60 on the left hand side of the chart extend out horizontally until the line meets the curved 150 psi upstream line. At this point, read vertically downward where it will be seen that 1/2" BRV2 will be required.

I

NSTALLATION AND

M

AINTENANCE

The valve should be installed in a horizontal pipeline with the direction of flow as indicated by the arrow on the valve body.

When the required set pressure has been achieved, the tamper proof pin may be used to prevent further pressure adjustments.

Any strainer fitted upstream of the BRV2S, and the strainer screen fitted inside the valve should be cleaned regularly so that the flow to the valve is not restricted. Full Installation and Maintenance Instructions are supplied with each product.

BRV2SP/BRV2BP

When external pressure sensing is used, remove the blanking plug (19) and fit the

1/8"/6mm O/D compressing fitting (20-supplied). The other end of the 6mm sensing pipe should be connected into the downstream pipework at least 1m downstream from the valve. For more detail, see Installation and Maintenance Instructions.

Spirax Sarco, Inc., 1150 Northpoint Blvd, Blythewood, SC 29016

Spare Parts

The spare parts available are shown in heavy outline.

Parts drawn in broken line are not supplied as spares.

AVAILABLE SPARE

Valve and seat assembly

* Bellows (Stainless Steel)

Option

* Spring Housing Cap Screw (set of 4)

F,M,L,J

E,F

Phosphor Bronze/Brass

G

D,Q * Pressure Adjustment Spring

Grey 2-25 psig • Green 20-60 psig

Orange 50-125 psig

* Set of all gaskets F,M

* Common to all sizes.

How to order

Always order spares by using the description given in the column headed Available Spare and stating the size, type and pressure range of the reducing valve.

Example:Pressure Adjustment Spring, pressure range

50-125 psig (orange) for 1/2" Spirax Sarco Type

BRV2 Reducing Valve.

TI-3-107-US 07.97

Telephone: (803) 714-2000 FAX (803) 714-2222