Available types:

DRV7 and DRV7G are available in 6 pressure ranges (suffix 1-6).

Downstream pressure ranges:

Screwed

1⁄2" to 2"

Actuator

type

1

DRV7(G)B1(N)

2

DRV7(G)B2(N)

3

DRV7(G)B3(N)

4

DRV7(G)B4(N)

5

DRV7(G)B5(N)

6

DRV7(G)B6(N)

* DN32 to DN50 Range 0.15 - 0.6, DN65 to DN100 Range 0.3 - 0.6

**DN65 to DN100 Range 0.4 - 1.2.

Sizes and pipe connections

1⁄2", 3⁄4" 1", 11⁄4", 11⁄2", and 2"

Screwed BSP (BS 21 parallel), NPT also available on request.

DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80 and DN100.

Standard flanges: EN 1092 PN16 and PN25

Flanges available on request: ASME 150 and JIS

Pressure / temperature limits

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A

B

C

D

Range Valve type

Spring

colour

PN

Rating

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H

Steam

saturation

curve

Flanged

DN15 to DN100

A - D - E

A - C - G

A - B - F

H- H

Screwed and flanged EN 1092 PN25.

Flanged EN 1092 PN16.

Flanged ASME 150.

The DRV7G is limited to 90°C.

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H

G

F

E

Body design conditions

Maximum design pressure

Maximum design temperature

Minimum design temperature

Maximum operating temperature

Minimum operating temperature

PN25

25 bar g @ 100°C

DRV7

300°C @ 17.5 bar g

DRV7G

90°C @ 25 bar g

0°C

DRV7

300°C @ 17.5 bar g

DRV7G

90°C @ 25 bar g

1 or 1N

2 or 2N

3 or 3N

4 or 4N

5 or 5N

5 or 5N

Yellow

Yellow

Blue

Blue

Blue

Red

(bar)

*0.1-0.6

2.5

4.6.30

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Pressure bar g

The product must not be used in this region.

0°C

Note: For lower operating temperatures consult Spirax Sarco

Kvs values

Size DN 15

20 25

Kvs

3.4 6.5 11.4 16.4 24 40

58 92 145

Maximum differential pressure

DN15-DN50

25 bar

DN65-DN100

20 bar

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

Note: With internals fitted, test pressure must not exceed 25 bar g

32

40 50 65

Note: The Kvs values shown above are full capacities and should

Control valves

Pressure reducing/surplussing valves

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 2013

DRV7 and DRV7G

SG Iron

Pressure Reducing Valves

Description

The DRV7 is an SG iron direct acting bellows sealed pressure reducing valve. The standard version has an EPDM diaphragm and is

suitable for steam, water and air applications. The DRV7 is available with a Nitrile rubber diaphragm (suffix 'N') for oil applications.

A Nitrile rubber soft seated version (suffix 'G', limited to 90°C) is also available for applications that require tight shut-off. It is recommended

that for these applications a maximum pressure turndown ratio of 10:1 is observed.

Note: To protect the actuator diaphragm on steam applications a WS4 water seal pot must be installed in the downstream pressure

signal line to the actuator. Refer to TI-S12-03 for details.

Pressure

range

**0.2-1.2

2.5

0.8-2.5

6.0

2.0-5.0 16.0

4.5-10.0 25.0

8.0-20.0 25.0

be used for safety valve sizing purposes where they are required.

TI-P204-01

CH Issue 14

T

e

m

p

e

r

a

t

u

r

e

°

C

80 100

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